Relevant bibliographies by topics / Coupon Tests

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Coupon Tests'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Coupon Tests"

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Nikhamkin, M. S., N. A. Sazhenkov, and D. Samodurov. "Fatigue Testing Method of Test Coupon and Structurally Equivalent Samples of Carbon Fiber Reinforced Polymer for Gas Turbine Engine Parts and Assemblies." Solid State Phenomena 284 (October 2018): 43–47. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.43.

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The carbon fiber reinforced polymer composite are widely used in industry as major structural materials. They represent the greatest interest for the production of gas turbine engines parts because of their high specific strength. But before adaptation these materials into the structure, it is necessary to conduct a number of tests, both on test coupon and on structurally equivalent samples for determining physical, in particular, fatigue properties of these materials. However, the high cost of manufacturing coupons for such tests has a negative impact on the adaptation of carbon fiber reinforced polymer composite into the composition of final products. In this paper it is presented a method for fatigue tests of test coupon and structurally equivalent samples of carbon fiber reinforced polymer, aimed at reducing the consumption of coupons which are necessary for obtaining fatigue properties. Based on the developed method, a series of carbon fiber coupons was tested and the fatigue limit was obtained. At the same time, the use of coupons was minimized.
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J. Kitchen, Philip, Sharifah Faridah Syed Alwi, Norbani Che-Ha, and Pei Yee Lim. "Coupon redemption behaviour: a Malaysian cross-segment investigation." Marketing Intelligence & Planning 32, no. 1 (January 28, 2014): 66–88. http://dx.doi.org/10.1108/mip-05-2013-0089.

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Purpose – The purpose of this paper is to examine differing attitudinal characteristics (attitude and subjective norms) and perceptions of coupon characteristics (coupon value and coupon expiration date) towards coupon redemption based on psychological and demographic segments of consumers who may well differ in their purchase motivations and accompanying decision making. Design/methodology/approach – Following a detailed literature review, the characteristics are examined by means of a structured questionnaire administered via “mall intercept” to a convenience sample in major shopping areas in Malaysia. Findings – Following a variety of statistical tests, the findings support the use of coupon proneness, value consciousness, price consciousness and brand involvement as separate variables underpinning coupon usage propensity and indicated the value of coupons if used judiciously in relation to pre-identified segments. Research limitations/implications – The limitations associated with convenience sampling apply here, that is the findings cannot be generalised. Practical implications – The basis for sound parameters for the use of coupons are of value to marketing management. Originality/value – The paper offers an unique insight into coupon propensity and usage from a little-known economy. Its value lies in the degrees of support offered to findings from more advanced economies and a basis for differentiation in the Malaysian context.
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Huang, Yuner, and Ben Young. "The art of coupon tests." Journal of Constructional Steel Research 96 (May 2014): 159–75. http://dx.doi.org/10.1016/j.jcsr.2014.01.010.

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Freeman, R. A., and D. C. Silverman. "Technical Note:Error Propagation in Coupon Immersion Tests." CORROSION 48, no. 6 (June 1992): 463–66. http://dx.doi.org/10.5006/1.3315961.

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Sunar Bükülmez, Pınar, and Oguz C. Celik. "Pre and post-fire mechanical properties of structural steel and concrete in steel-concrete composite cellular beams." MATEC Web of Conferences 282 (2019): 02054. http://dx.doi.org/10.1051/matecconf/201928202054.

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This paper presents an experimental investigation into possible variations of mechanical properties of structural steel and concrete in composite cellular beams exposed to ISO 834 fire and cooled down phases. Four full-scale fire tests were performed on protected and unprotected beams under assumed service loads. Tensile stress-strain behavior of steel coupons taken from the beams and compressive strengths of concrete cores taken from the reinforced concrete slabs are studied. Material coupon tests for steel are carried out as per TS EN ISO 6892-1. As for the concrete, compression tests were conducted. Coupon test results reveal that, after fire testing, a maximum reduction ratio of 65% in ultimate strain is obtained for the unprotected beam samples. This indicates that the reductions in the mechanical properties of steel in the protected beams are much less when compared to those of the unprotected beams. It is also found that the maximum increase in post-fire strength/pre-fire strength ratios for concrete is 11% for the unprotected beam, while a 20 % decrease is recorded for water based protected cellular beam. For the protected specimens, the RC slabs were exposed to higher temperatures, and the compressive strength of concrete after testing was lower than that of the unprotected beam slabs.
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Clay, Stephen B., and Philip M. Knoth. "Experimental results of fatigue testing for calibration and validation of composite progressive damage analysis methods." Journal of Composite Materials 51, no. 15 (September 16, 2016): 2083–100. http://dx.doi.org/10.1177/0021998316670132.

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The Air Force Research Laboratory led a research effort to benchmark the accuracy of static and fatigue predictions of several emerging composite progressive damage analysis techniques. The static portion of this technical effort is described in detail in a previous special issue of the Journal of Composite Materials. This paper provides the details of the fatigue experiments that were conducted to calibrate and validate the computational models. Initially, in-plane and out-of-plane S–N curves were generated through coupon tests that were performed on unidirectional laminae. The challenges experienced during fatigue testing of in-plane, matrix-dominated unidirectional coupon specimens are presented in detail. The higher fidelity test data from the fiber-dominated and out-of-plane experiments are also included in this paper. Following the calibration experiments, a series of tension–tension fatigue validation tests were conducted on open-hole coupons with three different stacking sequences. Each specimen was cycled to a pre-determined number of fatigue cycles, followed by static residual strength tests in both tension and compression. This paper provides the stress–strain responses of these validation tests as well as high-resolution X-ray computed tomography images of the subsurface damage as a function of cycles. Seven analysis teams used these test results to calibrate their models and to benchmark the accuracy of their predictions of damage and residual mechanical properties.
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Clay, Stephen B., and Philip M. Knoth. "Experimental results of quasi-static testing for calibration and validation of composite progressive damage analysis methods." Journal of Composite Materials 51, no. 10 (July 15, 2016): 1333–53. http://dx.doi.org/10.1177/0021998316658539.

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The Air Force Research Laboratory directed a research program to evaluate nine different composite progressive damage analysis methods under both quasi-static and fatigue loading. This paper describes the coupon tests that were performed at the Air Force Research Laboratory for calibration and validation of the methods under quasi-static conditions. The basic elastic and failure properties of unidirectional IM7/977-3 graphite/epoxy were first determined in order to properly calibrate the models. Validation tests were then performed on unnotched and open-hole coupons with three different laminate stacking sequences under both tension and compression loading conditions. This paper summarizes these experimental results and provides X-ray computed tomography images at subcritical load levels.
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Gallagher, Joseph P., and Lorrie Molent. "Effect of Load Spectra and Stress Magnitude on Crack Growth Behavior Variability from Typical Manufacturing Defects." Advanced Materials Research 891-892 (March 2014): 100–105. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.100.

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DSTO conducted a comprehensive series of fatigue coupon tests as part of the fatigue life substantiation of the RAAF F/A-18 Hornet. The study employed five spectra which were applied to flat aluminium alloy 7050-T7451 coupons to determine the effects of manufacturing discontinuities and stress magnitude on the fatigue nucleation and crack growth behavior. Crack growth behavior was established using optical microscopy and scanning electron fractography, measuring crack sizes greater than approximately 0.05 mm. This paper reports the fraction of life to failure as well as the probability of occurrence of a crack with a defined size.
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Xu, Bo, Junwu Xia, Renwei Ma, Jian Wang, Xiaomiao Chen, Hongfei Chang, and Lihai Zhang. "Investigation on True Stress-Strain Curves of Flat and Corner Regions of Cold-Formed Section Using 3D Digital Image Correlation Method." Advances in Civil Engineering 2019 (December 16, 2019): 1–18. http://dx.doi.org/10.1155/2019/3138176.

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The true stress-strain curve is the critical method to describe the practical material mechanical performance and the essential precondition to develop the advanced numerical simulation. Experimental, analytical, and numerical procedures were performed in present research to investigate the true stress-strain curves of flat and corner regions of the cold-formed channel section. The coupon tests with the 3D digital image correlation system were conducted on flat and corner specimens to directly obtain the true stress-strain curves. The experimental results indicate that the tensile secondary-hardening phenomenon at the plastic strain stage was observed in the true stress-strain curves of flat coupons, and initial strain hardening behavior was produced in that of corner coupons. Flat region exhibits a significant improvement of true ultimate strength compared to the engineering value. The stress status of the corner region is developed to ultimate strength at the early strain phase and exhibits a slight increase compared with the nominal values at the plastic phase. Cold-rolling action limits the ductility performance of the corner region, which highly restrains the tensile strain hardening at the plastic condition. Thus, the true yielding strength of the corner region is obviously higher, but the true ultimate strength is significantly lower than that of the flat region. Together with the optical measuring results, a trilinear model with two-stage strain hardening and a simplified trilinear models were established for describing the true stress-strain curves of flat and corner regions, respectively. The load-displacement curves from numerical simulations fit very well with those of coupon tests, which validate the reliability of the optic measurement and the dependability of the simplified constitutive models.
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Park, Chan Y., Nam H. Kim, and Raphael T. Haftka. "How coupon and element tests reduce conservativeness in element failure prediction." Reliability Engineering & System Safety 123 (March 2014): 123–36. http://dx.doi.org/10.1016/j.ress.2013.10.012.

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Dissertations / Theses on the topic "Coupon Tests"

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Tola, Tola Adrian Patricio. "Analytical and Experimental Investigation of Low-Cycle Fatigue Fracture in Structural Steel." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/100051.

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The mechanism of metal material failure due to inelastic cyclic deformations is commonly described as Low-Cycle Fatigue (LCF). Fracture in steel structures caused by earthquakes can be associated with this mechanism. Mathematical expressions describing the material deterioration due to LCF are often referred to as LCF laws. The accurate determination of the safety of steel structures against earthquake-induced failure requires the use of LCF laws which have been sufficiently validated with experimental test data. The present study combined experimental testing and computational simulation to enhance the understanding of structural steel fracture due to LCF. The experiments were conducted in specimens extracted from the flat and corner regions of two rectangular steel hollow sections with different thickness. A total of 60 cylindrical specimens with a circumferential notch were subjected to different combinations of axial and torsional loading. The loading protocols and notch geometry were designed to produce different stress states at the location of fracture initiation. Finite element analyses were conducted to obtain the stress state and inelastic strains at the fracture initiation location. This information was then used for the calibration of five existing LCF laws. The calibration also allowed the comparative evaluation of the capability of the different laws to capture fracture initiation for different stress states, with a single set of values for the various parameters. The accuracy of the calibrated LCF laws to predict fracture initiation in a large-scale test was also investigated. To this end, a test was conducted on a rectangular steel tube subjected to cyclic axial loading. A finite element analysis of this test was conducted, and predictions of the instant and location of fracture initiation using the calibrated LCF laws were compared with the experimental observations.
Doctor of Philosophy
The mechanism of material failure due to repeated cycles of large deformations is denoted as Low-Cycle Fatigue (LCF); this failure mechanism can occur in steel structures subjected to loading conditions such as those induced by earthquakes. Mathematical expressions that evaluate the material deterioration due to LCF are often used to predict the instant and location of fracture initiation in small-scale and large-scale tests. An experimental program was conducted for the study of fracture associated with LCF. A total of 60 specimens were fabricated with material extracted from the flat and corner regions of two rectangular steel tubes; the applied loads elongated and/or twisted the specimens until they ruptured. Computational simulations of these tests were conducted to obtain key information at the location of the observed fracture initiation. This information was used to adjust five mathematical expressions suggested by previous researchers that could predict the same instant of fracture initiation observed in the experiments. The accuracy of the predictions from each of these mathematical expressions was evaluated. The accuracy of these mathematical expressions to predict fracture initiation in a large-scale test was also investigated. To this end, an experiment was conducted on a rectangular steel tube subjected to repeated cycles of deformation. A computational simulation of this test was also developed, and predictions of the instant and location of fracture initiation were compared with the experimental observations.
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Lima, Ricardo Alves. "O Teste do Desenho do Casal no diagnóstico da satisfação conjugal." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/47/47131/tde-15022011-101129/.

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O casamento e a satisfação conjugal são aspectos importantes do desenvolvimento humano, que têm despertado o interesse de muitos pesquisadores no campo da Psicologia, principalmente na área Clínica e da Avaliação Psicológica. Este estudo teve como objetivo principal desenvolver um novo instrumento para a avaliação da satisfação conjugal, o Teste do Desenho do Casal (TDC) e estabelecer possíveis indicadores gráficos e dinâmicos para esse propósito. Assim pretendeu-se verificar por meio do TDC se existem diferenças relativas à satisfação conjugal entre pessoas com e sem filho(s) e entre homens e mulheres da cidade de São Paulo. Participaram da pesquisa 201 sujeitos, 100 homens e 101 mulheres, divididos igualmente em grupos com e sem filhos. Todos eram casados pela primeira vez por um período entre um e dez anos completos, não estavam em situação de gravidez e possuíam, no mínimo, ensino médio incompleto. A coleta de dados foi realizada individualmente. Os instrumentos foram: material gráfico para a aplicação do TDC; Formulário Complementar de Satisfação Conjugal (elaborado especialmente para esse estudo); Escala de Satisfação Conjugal (ESC); Marital Adjustement Test, adaptado à realidade brasileira (MAT-MARI) e gravador. Após a avaliação das ESCs e dos MAT-MARIs foram excluídos 27 sujeitos da amostra de análise, pois se enquadravam numa faixa neutra de avaliação da satisfação conjugal. A amostra final foi constituída de 174 sujeitos, metade de cada sexo. Os desenhos foram avaliados por sete juízes, com experiência na avaliação de técnicas projetivas gráficas. Os principais resultados em relação ao TDC foram: coeficientes de precisão acima de 0,600 na avaliação da maioria dos juízes em 28 dos 38 itens propostos; os itens de impacto da estória e impacto da avaliação global apresentaram validade para avaliação 4 da satisfação conjugal; sete itens foram considerados esperados, com freqüência >85% nos desenhos; foram identificados dez itens como indicadores de insatisfação conjugal; foi estabelecido um número mínimo de indicadores para o diagnóstico de insatisfação conjugal. Quanto às principais diferenças relativas à satisfação conjugal entre homens e mulheres, com e sem filhos, foram encontrados: 14 aspectos que diferenciaram significativamente as respostas de pessoas satisfeitas e insatisfeitas conjugalmente (p_0,02), bem como foram encontradas diferenças significativas entre homens e mulheres em relação aos aspectos que consideram importantes para a satisfação conjugal. Concluiu-se que o TDC e os dados complementares obtidos podem auxiliar profissionais na clínica de família e casais, tanto no diagnóstico da insatisfação conjugal como na proposta de medidas preventivas ao bem estar no casamento. Entretanto, verificou-se também a necessidade de aprofundamento nos estudos da avaliação psicológica e da detecção de elementos relativos à vida conjugal no curso do desenvolvimento familiar, pois tais variáveis apresentam-se, ao longo do tempo, extremamente dinâmicas e multifacetadas.
Marriage and marital satisfaction are important aspects of human development, which have raised the interest of many researchers in Psychology, especially in the areas of Clinical Psychology and Psychological Assessment. The main objective of this study was to develop a new instrument for the evaluation of marital satisfaction, the Couple Drawing Test (CDT), as well as to establish possible graphic and dynamics indicators for that purpose. We intended to verify, through CDT, whether there were differences, concerning marital satisfaction, between individuals with and without children, and also between men and women in the city of Sao Paulo. An initial number of 201 subjects took part in the research, 100 men and 101 women, equally divided in groups of individuals with and without children. They had all been married for the first time, for a period of 1-10 years, without occurrence of pregnancy during research period, and possessed a minimum educational level of incomplete high school. Data was collected individually. The assessment instruments were: graphic material for the administration of the CDT; a Marital Satisfaction complementary assessment form (especially developed for this study); Marital Satisfaction Scale (MSS); Marital Adjustment Test adapted to Brazilian context (MAT-MARI); and voice recorder. After the evaluation of the MSSs and MAT-MARIs, 27 subjects were excluded from the sample analysis because they fell in a neutral range of the marital satisfaction indicators. The final sample had 174 subjects, half of each sex. The drawings were evaluated by seven judges who were psychologists with expertise in the evaluation of projective graphic techniques. The main results concerning the CDT were: reliability coefficients higher than 0,600 in the evaluation of the majority of judges in 28 out of the 38 proposed items; the items story impact and global evaluation impact showed appropriate validity for the evaluation of marital satisfaction; seven items were considered expected, with a >85% frequency on drawings; ten items were identified as indicators of marital dissatisfaction; a minimum number of indicators was established for the diagnosis of marital dissatisfaction. Concerning the main differences in marital satisfaction for men and women, with and without children, the findings were that 14 aspects significantly distinguished the answers of maritally satisfied and dissatisfied individuals (p_0,02) and significant differences were found between men and women with regard to the issues 6 considered important for the marital satisfaction. The conclusion was that the CDT and the complementary data obtained might assist professionals in their clinical work with families and couples, not only in the diagnosis of marital dissatisfaction, but also in the suggestion of preventive actions regarding the marriage welfare. Nevertheless, we emphasize the need of further studies on psychological evaluation and identification of elements concerning marital life in the course of family development, once the variables researched proved to be, over time, extremely dynamic and multifaceted.
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Harris, Victor W., Brian Visconti, Nelly Nelson, and Ginny Hinton. "Rethinking Traditional Pre-Test Post-Test Evaluation in Couple & Relationship Education: Final Results From a Three-Year Study." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/secfr-conf/2019/schedule/37.

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Corrêa, Stefane Santos. "Qualidade dos couros de tilápia, corvina e pescada amarela." Universidade Estadual do Oeste do Paraná, 2017. http://tede.unioeste.br/handle/tede/3140.

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Submitted by Marilene Donadel (marilene.donadel@unioeste.br) on 2017-11-08T23:52:44Z No. of bitstreams: 1 Stefane_S_Corrêa_2017.pdf: 1344962 bytes, checksum: 2369f5181c7145ed68be3f6f7181b3f8 (MD5)
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The leather tanning of fish is a way of alleviating the damage caused by chromium salts to the environment. this work had as objective evaluate the process of tanning leather in the skins in corvina and pescada amarela from fishing made in the northern region of Brasil and tilápia origin of fish farming. The species caught in the fishing of the region present the potential for use in the tanning because they are large, which allows you to add value to the final product. The skins were to the same tanning process not differing in any of its stages. to determine the efficiency of the process, the skins of corvina, pescada amarela and tilapia were submitted to the resistence test the traction, stretching and progressive tear in the longitudinal and transverse directions of the body of the fish and the physical-chemical analysis. the resistance tests the traction and stretching were satisfactory for manufacturing of products and clothing. However, suggests improve the grease of the tanning process.
O curtimento vegetal de couro de peixes é uma forma de amenizar os danos causados pelos sais de cromo ao ambiente. Este trabalho teve como objetivo avaliar o processo de curtimento nas peles de corvina e pescada amarela oriundas da pesca realizadas na região norte e tilápia oriunda de piscicultura do estado do Paraná. As peles foram submetidas ao mesmo processo de curtimento vegetal não diferindo em nenhuma das suas etapas. Para determinar a eficiência do processo, as peles de corvina, pescada amarela e tilápia foram submetidas à análise físico-química, ao teste de resistência à tração, alongamento e rasgamento progressivo no sentido longitudinal e transversal do corpo do peixe. Foi realizada a analise histológica dos couros, para se analisar a estrutura das fibras. Os testes de resistência à tração e alongamento foram satisfatórios, comprovando que as peles das espécies capturadas na pesca da região norte do Brasil apresentam potencial para utilização no curtimento, apresentando qualidade apropriada para confecção de produto, vestuário e calçado. Entretanto, sugere-se aprimorar a etapa de engraxe do processo de curtimento.
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Harris, Victor W., Brian Visconti, Prami Sengupta, and Ginny Hinton. "Justification for Use of the Pre-Test then Retrospective Pre-then-Post-Test Evaluation in Couple and Relationship Education." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/secfr-conf/2018/schedule/7.

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A retrospective pre-then-post survey instrument design was intentionally used as a good fit for the SMART programming in order to evaluate learning outcomes both before and after the program for several reasons (see Marshall, Higginbotham, Harris, & Lee, 2007; Moore & Tananis, 2009) summarized below. The experimental pretest-posttest design using a control or comparison group is considered to be one of the most respected methods that can be used to measure change in individuals (Campbell & Stanley, 1966; Kaplan, 2004). This design is highly regarded because of its control over internal validity concerns and ability to compare results from the same people or groups of people at multiple time points. While there are advantages to using the pretest-posttest method, there are some limitations with this research method as well. One limitation comes with finding an adequate comparison group, which can be difficult or impossible for the researchers to locate. Another limitation concerns the possible lack of resources and time available for community-based programs to complete comprehensive pretest-posttest comparisons (Brooks & Gersh, 1998). Also, in order for the pretest-posttest comparisons to be meaningful, participants must attend the complete program from start to finish (Pratt, McGuigan, & Katzey, 2000). Due to the nature of community education programs, attrition and sporadic attendance are common issues (Pratt, McGuigan, & Katzev, 2000). While the pretest-posttest information must be complete for comparisons to be made, it may be challenging for researchers to see the actual changes in attitudes, behaviors, or skills if the participants overstate their original attitudes, behaviors, or skills when completing the pretest (Howard & Daily, 1979; Moore & Tananis, 2009). This overestimation may occur when the participants do not have a clear understanding of the attitudes, behaviors, or skills that the program is targeting (Pratt, McGuigan, & Katzev, 2000). A lack of knowledge on certain topics (e.g., attitudes, behaviors, skills) often supports the initial need for a program intervention, but this same issue may show participants during the program that they actually knew much less than they thought when they completed the pretest. Thus, one must be aware of the potentially misleading information from pretest-posttest comparisons due to the participants’ change in perspective (Howard & Daily, 1979). “Response shift bias,” first referred to by Howard and Daily (1979), explains the “program-produced change in the participants’ understanding of the construct being measured” (Pratt, McGuigan, & Katzev, 2000, p. 342). Response shift bias was assessed in this study by administering a pre-test at the beginning of programming and a pre-then-post test at the end of programming. Results indicate that response shift bias was present in a majority of the variables studied and that the design of administering a pre-test and then a retrospective pre-then-post test is a good fit for exposing response shit bias. Specific results will be discussed.
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Dufouil, Carole. "Modelisation des correlations intra-couple : application a l'etude des factions cognitives." Paris 11, 1997. http://www.theses.fr/1997PA11T011.

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YGUEL, HENRY SYLVIE. "Test d'efficacite des instruments endodontiques utilises en traction pure : mise au point d'un protocole experimental original." Nancy 1, 1988. http://www.theses.fr/1988NAN13403.

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Enaim, Mohammed. "Etude de la co-forgeabilité d'u multi-matériau : application à un coupe d'acier." Thesis, Paris, ENSAM, 2019. http://www.theses.fr/2019ENAM0002/document.

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Le forgeage multi-matériaux est un procédé permettant la mise en forme et l’assemblage simultanés de matériaux différents. Ce procédé permet d’obtenir des pièces multi-matériaux avec le « bon matériau placé au bon endroit ». L’objectif des travaux de thèse est de définir les conditions nécessaires à l’établissement de la liaison métallurgique par forgeage à l’interface d’un couple d’aciers. Dans un premier temps, l’état de l’art a servi à l’identification les phénomènes physiques accompagnant le forgeage multi-matériaux et les paramètres clés pilotant l’établissement de la liaison métallurgique. Le principe de base de l’établissement d’une liaison passe par la fragmentation des oxydes en surface des matériaux et par l’application d’une pression de contact favorisant le contact entre les matériaux nus et la diffusion. Les deux paramètres clés identifiés sont donc la pression normale de contact et l’expansion de surface. Le protocole de caractérisation du co-forgeage mis en place comporte trois essais « simples » permettant de solliciter les interfaces avec des pressions et des expansions différentes. Ces dernières, estimées par simulation numérique de l’essai, sont mises en relation avec la qualité des liaisons obtenues évaluée, quant à elle, au travers d’observations métallographiques. Les premières simulations permettent de dimensionner les campagnes expérimentales. Celles-ci sont ensuite conduites sur les moyens de mise en forme de la plateforme VULCAIN. Les efforts de mise en forme et la géométrie globale des pièces et la répartition de matière servent de base à l’identification des paramètres de la simulation. La simulation ainsi obtenue et les observations métallographiques aux interfaces sont ensuite mises en lien. Cette démarche a permis de confirmer l’importance du rôle joué par la pression de contact et l’expansion de surface sur l’établissement d’une liaison au cours de la mise en forme du multi-matériaux. La répartition et la forme des particules d’oxydes semblent liées au chemin thermomécanique subi par l’interface
The multi-material forging is a forming process allowing, simultaneously, the welding and shaping of multi-material parts with the right material at the right place. The purpose of the presented work is to identify the necessary conditions to obtain a metallurgical bond during forming between two different grades of steel. First, the state of the art allowed the identification of the physical phenomena occurring during multi-material forging and the determination of the key parameters of the bonding which are the contact pressure and the surface expansion at the both sides of the interface. The mechanisms to establish metallurgical bond by forging are based on the breaking and the dispersion of the oxide layer at the interface then the extrusion of the soft material through the voids generated between the oxide fragments. Second, the characterization methodology of this work is presented. It consists of three “simple” forming tests leading to different interface conditions (contact pressure and surface expansion). The first simulations allow the design of the experimental plan for each test. The comparison between simulations and experiments allows the identification of physical parameters of the simulation. Then, the contact pressure and the surface expansion of the identified simulations are used to analyze the metallographic structure and the bonding at the interface.The developed work confirms the major effect of the contact pressure and the surface expansion on the establishment of a metallurgical bond during multi-material forming. The size and the shape of the oxide particles seem to depend on the thermomechanical path at the interface
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Humphreys, Lauren R. "The couple relationship and adjustment following prenatal genetic testing for advanced maternal age in women with normal test results." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/29116.

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Two studies were undertaken to explore how aspects of the couple relationship might play a role in women's experience of prenatal diagnosis (PND). Both studies involved women referred to the Children's Hospital of Eastern Ontario (CHEO) for prenatal genetic counseling due to advanced maternal age (AMA). The first study examined the role of the partner during the genetic counseling session by comparing 123 women who attended the session alone with 222 women accompanied by their partners, on the basis of self-report measures completed immediately prior to and following the session. Accompanied women reported somewhat higher levels of state anxiety and PND-related decisional conflict before the session than did those who attended alone (p < .05). The presence of the partner could thus reflect a support-seeking coping strategy employed by women to cope with feelings of indecision and anxiety surrounding the issue of prenatal diagnosis. Alternatively, it is possible that attendance by the partner contributed to anxiety and uncertainty among women. The second study sought to clarify the reasons for partner attendance or non-attendance at the genetic counseling and testing appointments, and to explore how certain relationship variables might relate to women's individual and marital adjustment following PND. Ninety-five women completed self-report measures prior to genetic counseling (Time 1), during the waiting period for PND test results (Time 2), and after normal results were known (Time 3). Many women reported that their partners attended the appointments on the basis of the couple's view of PND as a shared experience, or to provide emotional and decisional support for the women. The most common reason for partner non-attendance was work-related conflicts. At Time 2, distress was predicted by the degree to which women approached the PND decision jointly with their partners, and marital adjustment was predicted by women's satisfaction with the support received from their partners. Marital adjustment at Time 3 was predicted by earlier levels of partner agreement about PND-related issues. The association between pre-counseling partner agreement and Time 3 well-being was mediated by women's use of relationship-focused coping (partner support seeking and empathic responding) and moderated by women's satisfaction with their partners' support. Joint decision-making at Time 1 was linked to Time 3 adjustment indirectly, through women's satisfaction with their partners' support. Finally, women's use of avoidant coping strategies mediated the association between perceived partner support and Time 3 adjustment outcomes. Results suggest that aspects of the couple relationship have the potential to facilitate or hinder women's experience of PND counseling and testing, thus highlighting the potential benefits of focusing at least a portion of the genetic counseling session on couple-related issues.
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Schrank, Silvia Gabriela. "Tratamento de efluentes da indústria de couros através de processos avançados de oxidação." Florianópolis, SC, 2003. http://repositorio.ufsc.br/xmlui/handle/123456789/85483.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Química.
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A indústria do couro consome grande quantidade de água no processamento das peles, alcançando cerca de 30 a 80 m3 por tonelada de peles processadas. Os efluentes líquidos são caracterizados pela alta salinidade, alto conteúdo de matéria orgânica (DQO, DBO, COT, COD), nitrogênio orgânico e amônia. Além disso, estão presentes corantes, surfactantes, sulfetos orgânicos e inorgânicos, cromo, fenóis, surfactantes não-iônicos e pesticidas. As técnicas tradicionais para tratar efluentes de curtume são eficientes, mas predominantemente transferem parcialmente estes poluentes da fase líquida para a fase sólida, gerando o problema de disposição de resíduo sólido altamente tóxico. Novos métodos têm sido desenvolvidos para tratar efluentes industriais com o objetivo de produzir efluente tratado de alta qualidade e redução da geração do volume de lodo químico ou biológico. Desde a década de 70 os Processos de Oxidação Avançados (POAs) para tratar água, efluentes industriais e poluição atmosférica têm sido estudados. Estes processos envolvem a geração de radicais hidroxil como intermediários reativos, os quais têm um alto potencial de oxidação, capazes de decompor não-seletivamente compostos orgânicos, inorgânicos e metálicos, formando produtos menos nocivos. Neste trabalho foi estudado o tratamento de efluentes de curtumes utilizando Processos Avançados de Oxidação, utilizando efluentes sintéticos e efluentes reais de curtumes. A redução fotocatalítica simultânea do Cr(VI) e degradação do corante preto Luranzol S Kong foi estudada num reator batelada utilizando dióxido de titânico como catalisador. Os resultados mostraram que é possível eliminar cor e reduzir Cr(VI) simultaneamente, sendo que o corante atua como um doador de elétrons para a redução do Cr(VI). A cinética de descolorização obedeceu um modelo do tipo Langmuir-Hinshelwood e a velocidade da reação é mais rápida em pH ácido do que em pH neutro. Foram avaliados os processos de ozonização (O3), degradação fotocatalítica (TiO2/UV), degradação fotoquímica (H2O2/UV) e o processo Fenton, para tratar o efluente real da indústria do couro. A eficiência destes processos foi avaliada através de caracterização convencional (DQO, DOC, TOC, DBO, nitrato, amônia, sulfato, cloreto), toxicidade, e análises de substâncias específicas por cromatografia gasosa - espectrometria de massa e cromatografia líquida - espectrometria de massa. Os efeitos do pH, da concentração de H2O2 e da concentração de Fe2+ foram estudados. A oxidação dos poluentes orgânicos contidos no efluente de curtume, aplicando diferentes técnicas de POA, é mais ou menos efetiva de acordo com o potencial de oxidação do reagente utilizado e ao ajuste das condições do processo. Todos as processos de tratamento aplicados (TiO2/UV, O3, Fenton e H2O2/UV) resultaram em oxidação parcial e mineralização acompanhados da diminuição da DBO5. Apesar da degradação parcial, a toxicidade permaneceu constante. As análises de substâncias específicas aplicando GC- ou LC-MS acusaram a presença de fenol, benzotiazol, nonilfenoletoxilato e polietilenoglicol no efluente, que foram completamente degradados durante as diferentes etapas de POAs, conforme as análises GC-MS e LC-MS. Apesar da destruição de poluentes pelos diferentes tratamentos oxidativos, não foi observado aumento da biodegradabilidade, uma vez que foram encontrados compostos oxidados polares, com estrutura poliéter, gerados pelos tratamentos, e estes compostos são de difícil degradação ou eliminação nas estações de tratamento de efluentes.
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Books on the topic "Coupon Tests"

1

National Association of Corrosion Engineers. Preparation and installation of corrosion coupons and interpretation of test data in oilfield operations. Houston: NACE, 1991.

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Jellison, Jane. Evaluation of multilayer printed wiring boards by metallographic techniques: An illustrated guide to the preparation and inspection of plated-through hole test coupons based on the requirements of MIL-P-55110D. Washington, D.C: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Pinilla, Noelia. Tests De La Pareja / Couple Tests. Editorial Libsa Sa, 2004.

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Houser, Tcat, and Gudrun Funk. CompTIA Security+ Exam Coupon + CompTIA Security+ SY0-101 Practice Test. StudyExam4Less, 2005.

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Houser, Tcat, and Gudrun Funk. CompTIA Network+ Exam Coupon + CompTIA Network+ N10-002 Practice Test. StudyExam4Less, 2005.

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Determination of atomic oxygen fluence using spectrophotometric analysis of infrared transparent witness coupons for long duration exposure tests. [Washington, DC: National Aeronautics and Space Administration, 1993.

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Houser, Tcat, and Gudrun Funk. CompTIA A+ Exam Coupons + CompTIA A+ 220-301 Hardware and CompTIA 220-302 A+ Operating System Practice Tests. StudyExam4Less, 2005.

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Darling. Don't Fight It, Just Write It: A Couple One Year Relationship Evaluation Questionnaire Test. Dorrance Pub Co, 2003.

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Dohle, Gert R. Surgical treatment of male infertility. Edited by David John Ralph. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199659579.003.0097.

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Surgical treatment of male infertility is indicated in men with obstructive azoospermia due to epididymal and vassal blockage, in infertile men with a varicocele and oligozoospermia, and to harvest spermatozoa for future intracytoplasmic sperm injection (ICSI). Testis biopsy may be performed in men with normal testis volume and normal gonadotrophins to confirm the diagnosis of obstructive azoospermia. Furthermore, testis biopsies are indicated in men with risk factors for testis cancer, such as infertility and ultrasonograhic abnormalities.Varicocele repair seems effective in case of an infertility duration of at least 2 years, oligozoospermia, and otherwise unexplained infertility in a couple. The advantages of surgery in these couples are a fair chance of spontaneous pregnancies at relative low cost and with less obstetric problems and birth defect compared to pregnancies from IVF procedures.
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Haubold, Johannes. Converging Perspectives on Antiochos III. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198805663.003.0006.

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This chapter compares three texts about the Seleukid monarch Antiochos III: a decree of the Seleukid Greek city of Teos published shortly before the king’s war with Rome; a description of his conduct of the war written by the pro-Roman historian Polybios; and a cuneiform text from Babylon about Antiochos’ visit to the city just after the war. I argue that, despite differences in style, cultural background, historical context, and political allegiance, these texts converge around key themes of Seleukid imperial discourse, such as the king as benefactor and the importance of the royal couple. The chapter thus serves as a corrective to recent scholarship that tends to stress the differences between Greek and non-Greek perspectives on the Seleukid kings.
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Book chapters on the topic "Coupon Tests"

1

Brinkman, C. R., K. C. Liu, R. L. Graves, B. H. West, and G. M. Begun. "Low Heat Rejection Diesel Ceramic Coupon Tests." In 4th International Symposium on Ceramic Materials and Components for Engines, 1121–30. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2882-7_126.

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Malinowski, Paweł H., Tomasz Wandowski, Wiesław M. Ostachowicz, Maxime Sagnard, Laurent Berthe, Romain Ecault, Igor Solodov, Damien Segur, and Marc Kreutzbruck. "Extended Non-destructive Testing for the Bondline Quality Assessment of Aircraft Composite Structures." In Adhesive Bonding of Aircraft Composite Structures, 223–57. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-92810-4_4.

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AbstractWe present the results of extended non-destructive testing (ENDT) methods for bond line quality assessment in adhesive joints. The results presented were derived for important application scenarios with regards to aircraft manufacturing and the in-service repair of composite structures. The electromechanical impedance (EMI), laser shock adhesion testing (LASAT), and nonlinear ultrasound scanning (NUS) were used on flat coupon samples, scarfed samples, and curved samples. The EMI method applied to the flat coupons showed some relation of the frequency shift to the level of contamination. For the curved samples, there was insufficient sensitivity to differentiate distinct levels of contamination, while for scarfed samples in most cases both detection and distinction were possible. The LASAT method gave good results for the coupon samples, which were also in accordance with the results of the $${\text{G}}_{\text{IC}}$$ G IC and $${\text{G}}_{\text{IIC}}$$ G IIC tests. For coupon samples with multiple contaminations, we obtained results with varying significance. In the case of NUS, the measurements revealed an increase in nonlinearity affected by contamination at the interphase between the CFRP adherend and the adhesive layer for the majority of scenarios comprising single contamination of flat coupons and scarfed samples. The effect of multiple contaminations was a decrease in nonlinearity for the curved samples.
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Tserpes, Konstantinos, Elli Moutsompegka, Mareike Schlag, Kai Brune, Christian Tornow, Ana Reguero Simón, and Romain Ecault. "Characterization of Pre-bond Contamination and Aging Effects for CFRP Bonded Joints Using Reference Laboratory Methods, Mechanical Tests, and Numerical Simulation." In Adhesive Bonding of Aircraft Composite Structures, 51–117. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-92810-4_2.

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AbstractIn this chapter, the pre-bond contamination and ageing effects on carbon fiber reinforced plastic (CFRP) adherends and CFRP bonded joints are characterized by means of reference laboratory non-destructive testing (NDT) methods, mechanical tests, and numerical simulation. Contaminations from two fields of application are considered, namely in aircraft manufacturing (i.e. production) and for in-service bonded repair. The production-related scenarios comprise release agent, moisture, and fingerprint, while the repair-related scenarios comprise fingerprint, thermal degradation, de-icing fluid, and a faulty curing of the adhesive. For each scenario, three different levels of contamination were pre-set and applied, namely low, medium and high level. Furthermore, two types of samples were tested, namely coupons and pilot samples (a stiffened panel and scarf repairs). The CFRP adherends were contaminated prior to bonding and the obtained surfaces were characterized using X-ray photoelectron spectroscopy. After bonding, the joints were tested by ultrasonic testing. To characterize the effects of each contamination on the strength of the bonded joints, mode-I and mode-II fracture toughness tests, and novel centrifuge tests were conducted on the coupons, while tensile tests were performed on the scarfed samples. Additionally, numerical simulation was performed on CFRP stiffened panels under compression using the LS-DYNA finite element (FE) platform.
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Motes, William H., and Susan G. Motes. "Field Test of Package Coupon Effects on Brand Choice Behavior." In Proceedings of the 1984 Academy of Marketing Science (AMS) Annual Conference, 62–66. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16973-6_13.

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Andrulonis, Rachael, Royal Lovingfoss, and John Tomblin. "Additive Manufactured Polymer Test Coupons: Issues and Solutions." In Structural Integrity of Additive Manufactured Parts, 334–54. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2020. http://dx.doi.org/10.1520/stp162020180100.

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Fink, Brandi C., and Alyson F. Shapiro. "Locke-Wallace Marital Adjustment Test." In Encyclopedia of Couple and Family Therapy, 1–3. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-15877-8_405-1.

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Fink, Brandi C., and Alyson F. Shapiro. "Locke-Wallace Marital Adjustment Test." In Encyclopedia of Couple and Family Therapy, 1719–21. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-49425-8_405.

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Zhang, Qinglong, Zongbin Liu, Quanwei Cai, and Ji Xiang. "TST: A New Randomness Test Method Based on Coupon Collector’s Problem." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 362–73. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-23829-6_25.

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Schlag, Mareike, Kai Brune, Hauke Brüning, Michael Noeske, Célian Cherrier, Tobias Hanning, Julius Drosten, et al. "Extended Non-destructive Testing for Surface Quality Assessment." In Adhesive Bonding of Aircraft Composite Structures, 119–222. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-92810-4_3.

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AbstractThis chapter introduces various extended non-destructive testing (ENDT) techniques for surface quality assessment, which are first characterized, then enhanced, and finally applied to assess the level of pre-bond contaminations intentionally applied to carbon fiber reinforced plastic (CFRP) adherends following the procedures described in the previous chapter. Based on two user cases comprising different scenarios that are characteristic of either aeronautical production or repair, the detailed tests conducted on two types of sample geometry, namely flat coupons and scarfed pilot samples with a more complex shape, form the basis for applying the advanced ENDT procedures for the monitoring of realistic and real aircraft parts, as will be described in Chap. 10.1007/978-3-319-92810-4_5. Specifically, the reported investigations were performed to assess the surface quality of first ground and then intentionally contaminated CFRP surfaces using the following ENDT tools: the aerosol wetting test (AWT), optically stimulated electron emission (OSEE), two differently implemented approaches based on electronic noses, laser-induced breakdown spectroscopy (LIBS), Fourier-transform infrared (FTIR) spectroscopy, laser-induced fluorescence (LIF), and laser vibrometry.
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Hyatt, Tommy, Richard Martin, and Rich Fields. "Design of Coupons and Test Methodology for Orthotropic Characterization of FFF-Processed Ultem 9085." In Structural Integrity of Additive Manufactured Materials & Parts, 176–87. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2020. http://dx.doi.org/10.1520/stp163120190126.

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Conference papers on the topic "Coupon Tests"

1

Ribeiro Pla´cido, Joa˜o Carlos, Guilherme F. Miscow, Paulo E. V. de Miranda, and Theodoro A. Netto. "Drill Pipe Fatigue Analysis: Full Size Apparatus and Coupon Tests." In ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/omae2002-28354.

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Drill pipe fatigue damage occurs under cyclic loading conditions due to, for instance, rotation in curved sections of the well. Failures caused by crack nucleation and propagation are one of the highest risks to the structural integrity of these pipes. Usually, failure mechanisms develop in the transition region of the tool joint. Several mechanical and metallurgical factors affect the fatigue life of drill pipes. The former are mainly geometric discontinuities such as transition zones, pits and slip marks. The latter are related to the size and distribution of crystalline grains, phases and second phase particles (inclusions). In this study, the roles played by both factors in the fatigue life of drill pipes are studied through an extensive experimental test program. To this end, a fatigue simulator was designed and built to test full-scale drill pipes under rotating cyclic bending and constant tension loading. Additionally, the fundamental fatigue mechanisms are investigated via laboratory tests in small-scale coupons. These tests were performed in an opto-mechanical fatigue apparatus that was specially designed to perform in-situ real time monitoring surface analysis during the experiments.
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van Leeuwen, Hans, Don van Delft, John Heijdra, Henk Braam, Eric Jo̸rgensen, Denja Lekou, and Pantelis Vionis. "Comparing Fatigue Strength From Full Scale Blade Tests With Coupon-Based Predictions." In ASME 2002 Wind Energy Symposium. ASMEDC, 2002. http://dx.doi.org/10.1115/wind2002-21.

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In order to get a deeper understanding of the blade to blade variations and to determine the statistical distribution of the fatigue strength of rotor blades, 37 small rotor blades have been tested in static and fatigue loading. The blades are 3.4 m commercially available blades adapted to the needs of the project. Next to these blade tests, also coupons of identical material have been tested. The tests have encompassed static flapwise bending tests, flapwise fatigue tests at two different sections of the blade and edgewise fatigue tests. Since some blades could be re-used after a first test, a total number of 42 blade tests has been carried out in three different testing laboratories. The blades showed large deformation and development of creep. After correction for these phenomena, the fatigue strength of the blades seemed very good predictable with the classical Goodman relation using the well known slope parameter of 10.
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3

Park, Chanyoung, Nam Ho Kim, and Raphael T. Haftka. "The effect of the number of coupon and element tests on conservativeness." In 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2013. http://dx.doi.org/10.2514/6.2013-1819.

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van Leeuwen, H., D. van Delft, J. Heijdra, H. Braam, E. Jorgensen, D. Lekou, and P. Vionis. "Comparing fatigue strength from full-scale blade tests with coupon-based predictions." In 2002 ASME Wind Energy Symposium. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-21.

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5

Wright, Kenneth H., Todd A. Schneider, Jason A. Vaughn, Bao Hoang, Frankie Wong, and Gordon Wu. "Bypass diode temperature tests of a solar array coupon under space thermal environment conditions." In 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC). IEEE, 2016. http://dx.doi.org/10.1109/pvsc.2016.7750123.

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6

Adams, Timothy M., Jason Hebeisen, Jie Wen, and Douglas Munson. "Development of Crack Growth Curves and Correlation to Sustained Pressure Test Results for Cell Classification 445574C High Density Polyethylene Pipe Material." In ASME 2013 Power Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/power2013-98078.

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Code Case N755-1 of the ASME Boiler and Pressure Vessel Code, Section III, Division 1 Code currently permits the use of high density polyethylene (HDPE) in buried Safety Class 3 piping systems. There have been concerns with the Slow Crack Growth (SCG) of HDPE emanating from scratches that may occur during fabrication or installation. The possible use of tensile coupon tests for determining the life span of the pipe with surface scratches could provide a more cost effective testing method than does the use of sustained pressurized crack pipe tests. This paper presents the results of further investigation into the SCG rates of notched PE 4710 HDPE pipe made from a cell classification 445574C bimodal resin. The da/dt versus KI curves were developed from notched coupon testing. Standard fracture methods were then used to predict the failure time of the notched pressurized pipe specimens subjected to long-term hydraulic stress. The results for the SCG depth of the externally notched sustained pressurized pipe tests are provided along with the notched coupon test results. The actual failure times of the notched pressurized pipe tests are compared to the predicted failure times for the same specimens.
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McCay, Mary Helen, Pei-feng Hsu, D. Edward Croy, David Moreno, and Mengqi Zhang. "The Fabrication, High Heat Flux Testing, and Failure Analysis of Thermal Barrier Coatings for Power Generation Gas Turbines." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63683.

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Thermal barrier coatings (TBC) are used to protect the hot components of gas turbines engines to enhance thermal efficiency and component service life. The coating, based on yttria stabilized zirconia, is used in this study. In this paper high heat flux testing with a temperature gradient across the coating thickness of TBC coated coupons is presented. These buttons are subject to precisely-controlled laser heating on the top side and compressed air cooling on the bottom side. Analysis of the thermal conductivity change with respect to heating time and peak temperature, failure assessment, and metallurgical examination are also presented. Some important results of using this method of testing are: definition of the service time vs temperature relationship for TBC lifetime; improved durability of TBCs under severe environmental conditions; determination of effective steady-state sintering conductivity; identification of onset of coating cracking and delamination; adjustable peak temperature, automated and accelerated thermal cycling, etc. This leads to faster testing turn-around for TBC development. Two different types of heating modes can be employed: soak test and cycle test. In soak tests, coated coupons are subjected to steady laser heat flux for up to 12 hr. In cycle tests, the laser heat flux is on for one hour and then off to cool the coated coupons for three minutes. Coupon top surface temperatures from 1200 to 1528°C are maintained in various test cases. At the highest temperature test cases, delamination of TBC (cycle test) and surface crack (soak test) are observed. All key measurements (temperatures, laser power to coupon, compressed air flow rate, etc.) are recorded per second. The normalized thermal conductivity can be computed in real time or processed after the test. It is found that the normalized thermal conductivity increases in the first few hours or cycles of heating and it either reaches a near steady state value or decreases due to surface cracking or delamination in the later state of testing.
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Boulanger, Andrew, Hardik Patel, John Hutchinson, William DeShong, Weibin Xu, Wing Ng, and Srinath Ekkad. "Preliminary Experimental Investigation of Initial Onset of Sand Deposition in the Turbine Section of Gas Turbines." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56059.

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Particle ingestion into modern gas turbine engines is known to reduce performance and may damage many primary gas path components through erosion or deposition mechanisms. Many studies have been conducted that evaluate the effects of particulate ingestion in primary and secondary gas path components. However, modern gas turbines have gas path temperatures that are above most previous studies. As a result, this study performed particle deposition experiments at the Virginia Tech Aerothermal Rig facility at engine representative temperatures. Arizona Test Dust of 20 to 40 μm was chosen to represent the particle ingested into rotorcraft turbine engines in desert and sandy environments. The experimental setup impinged air and sand particles on a flat Hastelloy X coupon. The gas and sand mixture impacted the coupon at varying angles measured between the gas flow direction and coupon face, hereby referred to as coupon angle. For this study, gas and sand particles maintained a constant flow velocity of about 70 m/s and a temperature of about 1100°C. The coupon angle was varied between 30° to 90° for all experiments. The experimental results indicate sand deposition increased linearly from about 975 °C to 1075 °C for all coupon angles. A multiple linear regression model is used to estimate the amount of deposition that will occur on the test coupon as a function of gas path temperature and coupon angle. The model is adequate in explaining about 67% of the deposition that occurs for the tests. The remaining percentage could be explained with other factors such as particle injection rates and exact surface temperature where the deposits occur.
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9

Timms, Chris, Duane DeGeer, and Martin McLamb. "Effects of a Thermal Coating Process on X100 UOE Line Pipe." In ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2005. http://dx.doi.org/10.1115/omae2005-67401.

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The increased demand for high strength linepipe for onshore and offshore pipeline systems has been well documented over the past few years. The economic benefits have been demonstrated, and solutions have been developed to address the technical issues facing high strength linepipe use. However, there are still a few unanswered questions, one of which is addressed in this paper: what is the effect of thermal treatment during the pipeline coating process on the material behaviour of high strength linepipe? This paper presents the results of a thermal coupon study investigating the effects of low temperature heat treatment on the tensile and compressive stress strain curves of samples taken from X100 linepipe. Thirty axial test coupons and thirty circumferential test coupons were machined from a 52 inch diameter, 21 mm wall thickness UOE X100 linepipe. Some of the coupons were maintained in the as-received condition (no heat treatment) while others were heat-treated in a manner that simulates a coating plant induction heat treatment process. All coupons were subsequently tested in tension or compression, either at room temperature or at −18°C. This study has provided a number of interesting results. In regards to material strength, the heat treatment increased the tensile and compressive yield strengths in the longitudinal and circumferential coupons. Axial tensile, axial compressive and circumferential tensile yield strength increases ranged from 5 to 10%. Circumferential compressive yield strength increases ranged from 14 to 24%. A Y/T ratio increase of approximately 7% was observed for all heat-treated tensile coupons. The coupon tests conducted at −18°C were only slightly different than their room temperature counterparts; with an average yield strength increase of 4% in all directions and orientations and a slight reduction in Y/T ratio.
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10

Allan, M. L., C. C. Berndt, J. A. Brogan, and D. Otterson. "Thermal Sprayed Polymer Coatings for Corrosion Protection in a Biochemical Treatment Process." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p0013.

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Abstract Thermal sprayed ethylene methacrylic acid (EMAA) and ethylene tetrafluoroethylene (ETFE) coatings were evaluated for corrosion protection in a biochemical process to treat geothermal residues. Coupon, Atlas cell, peel strength and cathodic disbondment tests were performed in aggressive environments including geothermal sludge, hypersaline brine and sulfur oxidizing bacteria (Thiobacillus jerrooxidans) to determine coating suitability for protecting storage tanks and reaction vessels. It was found that the polymers were resistant to chemical attack and biodegradation at the test temperature of 55°C. The EMAA coatings protected 3l6L stainless steel from corrosion in coupon tests. However, corrosion of mild steel substrates coated with EMAA and ETFE occurred in Atlas cell tests that simulated a lined reactor operating environment and this resulted in decreased adhesive strength. Peel tests revealed that failure mode was dependent on exposure conditions. Cathodic disbondment tests in brine at room temperature indicated that EMAA coatings are resistant to disbondment at applied potentials of -780 to -1070 mV SCE for the test conditions and duration.
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Reports on the topic "Coupon Tests"

1

May, C. G. Law Vendor Coupon Co2 Blasting Tests. Office of Scientific and Technical Information (OSTI), July 2003. http://dx.doi.org/10.2172/816855.

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2

Edwards, W. Coupon Container Pressure Test. Office of Scientific and Technical Information (OSTI), October 2020. http://dx.doi.org/10.2172/1688579.

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3

Mark Fitzsimmons, Dave Grimmett, and Bryan McEnerney. CANMET Gasifier Liner Coupon Material Test Report. Office of Scientific and Technical Information (OSTI), January 2007. http://dx.doi.org/10.2172/921015.

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4

May, C. G. LAW Radioactive Coupon CO{sub 2} Decontamination Test. Office of Scientific and Technical Information (OSTI), January 2004. http://dx.doi.org/10.2172/821204.

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5

L. R. Zirker, M. K. Adler Flitton, T. S. Yoder, and T. L. Trowbridge. Examination of the 1970 National Bureau of Standards Underground Corrosion Test Welded Stainless STeel Coupons from Site D. Office of Scientific and Technical Information (OSTI), January 2008. http://dx.doi.org/10.2172/926327.

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Collar, J. I., M. Crisler, J. Hall, D. Holmgren, D. Nakazawa, K. O. O'Sullivan, R. Plunkett, et al. COUPP, a Heavy-Liquid Bubble Chamber for WIMP Detection: First Tests in the MINOS Near-Detector Gallery. Office of Scientific and Technical Information (OSTI), July 2004. http://dx.doi.org/10.2172/993555.

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Rosseel, Thomas M., Mikhail A. Sokolov, Xiang Chen, and Randy K. Nanstad. Light Water Reactor Sustainability Program: Report on the Completion of the Machining of Zion Unit 1 Reactor Pressure Vessel Blocks into Mechanical and Microstructural Test Specimens and Chemical Analysis Coupons. Office of Scientific and Technical Information (OSTI), May 2018. http://dx.doi.org/10.2172/1471907.

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