Relevant bibliographies by topics / Stress Concentration Factors

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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 'Stress Concentration Factors'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Stress Concentration Factors"

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Honda, Takashi, Tetsuya Sasaki, Teruhito Ohtsuka, and Etsuji Yoshihisa. "OS03W0395 The effect of heat conduction on stress concentration factors and stress intensity factors determined by thermoelastic stress analyses." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2003.2 (2003): _OS03W0395. http://dx.doi.org/10.1299/jsmeatem.2003.2._os03w0395.

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Segev, R. "Generalized Stress Concentration Factors." Mathematics and Mechanics of Solids 11, no. 5 (June 10, 2005): 479–93. http://dx.doi.org/10.1177/1081286505044131.

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Muminovic, Adis J., Isad Saric, and Nedzad Repcic. "Numerical Analysis of Stress Concentration Factors." Procedia Engineering 100 (2015): 707–13. http://dx.doi.org/10.1016/j.proeng.2015.01.423.

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Schindler, S., and J. L. Zeman. "Stress concentration factors of nozzle–sphere connections." International Journal of Pressure Vessels and Piping 80, no. 2 (February 2003): 87–95. http://dx.doi.org/10.1016/s0308-0161(03)00026-7.

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Xing Ji, Xi-Rui Liu, and Tsu-Wei Chou. "Dynamic Stress Concentration Factors in Unidirectional Composites." Journal of Composite Materials 19, no. 3 (May 1985): 269–75. http://dx.doi.org/10.1177/002199838501900305.

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Croccolo, D., and N. Vincenzi. "Stress concentration factors in compression—fit couplings." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 6 (June 1, 2010): 1143–52. http://dx.doi.org/10.1243/09544062jmes1881.

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The aim of the present work is to define the maximum stress generated by the coupling of axially symmetric and continuous shafts press-fitted into axially symmetric hubs. The theoretical stresses given by the well-known formulae of the thick-walled cylinders theory are constant on the whole coupling surface, but if the shaft extends beyond the hub there is a stress concentration factor on the boundary zone. This occurrence is confirmed by finite element analyses performed by the authors on several different shaft—hub couplings. The analysed couplings have the shaft extended beyond the hub, the shafts press-fitted into the hubs, and both shafts and hubs loaded by an external pressure and an internal pressure. The stress concentration factors have been calculated in this work and their expressions have been derived as a function of some tensile and geometrical parameters. By combining the thick-walled cylinders theory with the proposed formulae, it is possible to evaluate the maximum stress located at the end of the hub without performing any numerical investigations.
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DURELLI, A. J., and E. ROJAS TOLEDO. "Stress-Concentration Factors as Function of Displacements." Experimental Techniques 9, no. 9 (September 1985): 25–30. http://dx.doi.org/10.1111/j.1747-1567.1985.tb02050.x.

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Chiang, Chun‐Ron. "On stress concentration factors in orthotropic materials." Journal of the Chinese Institute of Engineers 22, no. 3 (April 1999): 301–5. http://dx.doi.org/10.1080/02533839.1999.9670467.

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Grabias, M., and M. Chrzanowski. "Influence of damage on stress concentration factors." Materials Science 34, no. 5 (September 1998): 701–8. http://dx.doi.org/10.1007/bf02355789.

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Brown, K. N., J. H. Sims Williams, J. Devlukia, and C. A. McMahon. "Reasoning with geometry: Predicting stress concentration factors." Artificial Intelligence in Engineering 5, no. 4 (October 1990): 182–88. http://dx.doi.org/10.1016/0954-1810(90)90019-z.

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Dissertations / Theses on the topic "Stress Concentration Factors"

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CARVALHO, EDUARDO ATEM DE. "STRESS INTENSITY FACTORS AND STRESS CONCENTRATION FACTORS FOR V NOTCHES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1992. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24990@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
A partir das equações de Williams e Creager foi desenvolvido um método híbrido, que acopla fotoelasticidade a um método numérico-computacional para determinação a dos fatores de intensificação de tensões (FIT) em placas planas sujeitas aos Modos I e II de abertura, com ou sem arredondamento na raiz do entalhe. Às equações propostas acopla-se um polinômio completo que representa uma tensão não-singular (sigma). Assim feito é possível a determinação dos coeficientes KI, KI e termos de sigma. Três programas de computador foram desenvolvidos para as formulações (Williams ou Creager): O primeiro: a partir da configuração das franjas isocromáticas, obtém-se KI e KII e os termos relativos à tensão não singular. O segundo: o desvio relativo a cada ordem de franja é determinado a partir dos termos acima. O terceiro: a partir dos valores determinados regenera-se as franjas isocromáticas para compara-las com as originais. As formulações foram testadas em modelos de barras com trincas e entalhes (com e sem arredondamento na raiz) e seus resultados comparados com dados disponíveis na literatura. Os fatores de influência na determinação de KI e KII, estudados foram: a quantidade de pontos e o ângulo delimitador da região de coleta de dados, bem como a influência dos termos referentes ao campo não singular e alguns aspectos do método numérico implementado. Como aplicação estudou-se o caso do corpo de prova tipo Charpy, onde, a partir das equações de Creager e dos valores de KI e KII assim determinados, pôde-se obter o valor de Kt para uma dada geometria.
A hybrid method coupling photoelasticity to a numerical-computational method which implements the William s (modes I and II) and Creager s (mode I) equations has been developed to determine the mixed-mode stress intensity factors in sharp notches and blunt cracks. The equations take into account the presence or not of a radius in the tip of the notch. To the proposed equations was added a complete polynomial, which represents the non-singular stress field. Three computational programs were developed for both formulations (William s and Creager): one to determine KI, KII and the non-singular terms, the second to evaluate the error between the actual situation and the results obtained and the third to regenerate the isochromatic fringes. The method has been tested in bars with cracks and notches (taking or not into account the existence of the radius at the depth of the notch) and the results were compared to experimental and analytical data found in the literature. Factors which have influence on the determination of KI, KII, were discussed: the number of data points and sector angle where those points are collected as well as the influence of the number of non-singular terms and some aspects of the numeric method. Two applications were studied: Charpy type test specimen under tension and bending and a beam with deep simetrycal grooves. With the values of KI and KII obtained by the Creager s equations one can determine the valeu of sigma x and sigma y in the analyzed situation, as well as the Kt value.
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Jandali, M. W. "Stress concentration factors for multiplanar tubular joints." Thesis, University of Manchester, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.523561.

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Biegler, Mark Warren. "Determination of stress concentration factors using experimental methods." Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/80145.

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Several experimental methods are examined for stress concentration factor determination. Tests are performed on a chosen 2-D specimen using strain gages, brittle coating, brittle specimen failure, photoelasticity, and Moire interferometry. Results are compared to each other and to finite element analysis performed on the same geometry. Strain gaging and photoelasticity were chosen as the best methods for stress concentration factor determination.
Master of Science
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Mutter, Nathan J. "Stress concentration factors for v-notched plates under axisymmetric pressure." Honors in the Major Thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1461.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.
Bachelors
Engineering and Computer Science
Mechanical Engineering
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Russell, Larry C. "Stress concentration factors of stepped structures and shouldered shafts under combined loading." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-01102009-063934/.

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Thompson, R. M. "The boundary-integral equation method applied to the derivation of stress concentration and stress intensity factors." Thesis, Cranfield University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353628.

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Kirkhope, Kenneth J. (Kenneth James) Carleton University Dissertation Engineering Mechanical. "Evaluation of stress intensity factors in multi-cracked thick-walled cylinders using finite element methods." Ottawa, 1988.

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Ozkeskin, Asli. "Settlement Reduction And Stress Concentration Factors In Rammed Aggregate Piers Determined From Full- Scale Group Load Tests." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12605153/index.pdf.

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Despite the developments in the last decades, field performance information for short aggregate pier improved ground is needed for future design and to develop a better understanding of the performance of the short (floating) aggregate piers. A full-scale field study was performed to investigate the floating aggregate pier behavior in a soft clayey soil. Site investigations included five boreholes and sampling, four CPT soundings, and SPT and laboratory testing. The soil profile consisted of 8m thick compressible clay overlying weathered rock. Four large plate load test stations were prepared. A rigid steel footing having plan dimensions of 3.0m by 3.5m were used for loading. Four 65cm diameter reaction piles and steel cross beams were used to load the soil in each station. First test comprised of loading the untreated soil up to 250 kPa with increments, and monitoring the surface settlements. Moreover, distribution of settlements with depth is recorded by means of deep settlement gages installed prior to loading. Other three tests were conducted on clay soil improved by rammed aggregate piers. In each station, seven stone columns were installed, having a diameter of 65cm, area ratio of 0.25, placed in a triangular pattern with a center to center spacing of 1.25m. The length of the columns were 3m, 5m in the two station resembling floating columns, and 8m in the last station to simulate end bearing columns to observe the level of the improvement in the floating columns. Field instrumentations included surface and deep settlement gages, and load cell placed on a aggregate pier to determine distribution of the applied vertical stress between the column and the natural soil , thus to find magnitude of the stress concentration factor, n , in end bearing and floating aggregate piers. It has been found that, the presence of floating aggregate piers reduce settlements, revealing that major improvement in the settlements takes place at relatively short column lengths. It has been also found that the stress concentration factor is not constant, but varies depending on the magnitude of the applied stress. The magnitude of stress concentration factor varies over a range from 2.1 to 5.6 showing a decreasing trend with increasing vertical stress.
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Daryusi, Ali. "Beitrag zur Ermittlung der Kerbwirkung an Zahnwellen mit freiem und gebundenem Auslauf." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1240915811153-56748.

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Durch die zunehmende technologische Entwicklung des Getriebe-, Gelenkwellen-, Werkzeugmaschinen-, Kraftfahrzeug-, sowie Landmaschinenbaus steigen die zu übertragenden Leistungen und Drehmomente enorm. Dies führt zu einem wachsenden Bedarf an formschlüssigen Profilwellenverbindungen und deren erhöhter Lebensdauer und Genauigkeit. Hierbei bilden die Zahnwellenverbindungen (ZWVen) mit Evolventenflanken nach DIN 5480 /N1/ den Regelfall für eine Vielzahl der Anwendung. Abhängig von Festigkeitsüberlegungen, Herstellungsverfahren und Platzbedarf treten in der Praxis nahezu ausschließlich die folgenden zwei Grundtypen auf. Es handelt sich dabei zum Ersten um die Zahnwelle (ZW) mit freiem Auslauf.Die zweite Geometrievariante ist die Zahnwelle mit gebundenem Auslauf, die eine nach DIN 471 /N2/ genormte Sicherungsringnut (SRN) enthalten kann. Zahnwellenverbindungen dienen zur Übertragung großer, wechselnder und stoßartiger Drehmomente ohne zusätzliches Verbindungselement durch die Profilierung der Welle und Nabe. Axiale Verschiebbarkeit unter Last, Profilverschiebungsmöglichkeit, einfache Montage und Demontage sowie die Herstellung mit hochleistungsfähigen umformenden und spanenden Massenfertigungsverfahren, die die Herstellungskosten verhältnismäßig niedrig halten, sind technisch bedeutsame Eigenschaften, die zum ansteigenden Einsatz von ZWVen führen (z.B. /N1/, /Vil84/, /Koh86/ und /Wes96/). Starke Kerbwirkung und erhebliche Überdimensionierung benachbarter Gestaltungszonen sind die wesentlichen Schwachpunkte der Profilverbindungen. Eine große Anzahl (ca. 80 %) von Ausfällen im Maschinenbau ist auf Schäden an Achsen und Wellen infolge konstruktiv bedingter Kerben zurückzuführen (z.B. /N3/ und /Hai89/). Speziell im Bereich der hochbeanspruchten Profilwellen-Verbindungen kommt es auf Grund der starken Querschnittsveränderungen und der häufig angewandten Ausläufe und Formelemente, z. B. Zahn- und Keilwellen zu Kerbwirkungen, die erhebliche örtliche Spannungskonzentrationen sowohl im Zahnfußbereich und Zahnlückenauslauf als auch im Bereich der Verbindung selbst verursachen. Diese Beanspruchungskonzentrationen sind fast in der Hälfte aller Zahnwellenbrüche die häufigste Ursache für Dauerbrüche (Ermüdungs- bzw. Schwingungsbrüche) und für Schäden (bleibende Verformung, Anriss, Gewaltbruch) infolge Maximalbelastung. Hier trifft die Lastüberhöhung am Welle-Nabe-Verbindungsrand mit dem Steifigkeitssprung des Verzahnungsendes auf der Welle zusammen /Die93/. Die erwähnten Schadensfälle belegen, dass der heutige Kenntnisstand über eine beanspruchungsgerechte Auslegung von Zahnwellen noch recht lückenhaft ist. Deshalb sind neue Erkenntnisse über Form- bzw. Kerbwirkungszahlen bei Einzel- und Mehrfachkerben von scharf und weniger scharf gekerbten Zahnwellen mit Auslauf für eine treffsichere Festigkeitsberechnung erforderlich und stellen damit die Hauptschwerpunkte dieser Arbeit dar. Das vorliegende Forschungsprojekt, welches sich erstmals mit der Ermittlung der Beanspruchungen in torsions-, und biegebelasteten Zahnwellen mit freiem und gebundenem Auslauf befasst, wurde im Rahmen der Forschungsvereinigung für Antriebstechnik e.V. (FVA) unter der Nummer T 467 und dem Forschungsthema „ Ermittlung der Kerbwirkung bei Profilwellen für die praktische Getriebeberechnung von Zahnwellen“ initiiert und untersucht.
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Huhnke, Christopher Robert. "Factors Affecting Minimum Dissolved Oxygen Concentration in Streams." Cleveland State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=csu1533910328223568.

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Books on the topic "Stress Concentration Factors"

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1901-, Peterson Rudolph Earl, ed. Peterson's stress concentration factors. 2nd ed. New York: Wiley, 1997.

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Jandali, Morhaf W. Stress concentration factors in multiplanar tubular joints. Manchester: UMIST, 1997.

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Shipping, Lloyd's Registerof. Complex tubular joints: Assessment of stress concentration factors for fatigue analysis. London: HMSO, 1985.

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Kiwanuka, Frederick. Finite element assessment of RHS fillet welded connectionsd: Stress concentration factors of k-joint with overlap. Manchester: UMIST, 1995.

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Wimpey Offshore Engineers and Constructors. Elastic Stress Concentration Factor (SCF) tests on tubular steel joints: A programmeof tests by Wimpey Offshore Engineers & Constructors Limited for the UK Department of Energy. London: H.M.S.O., 1988.

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Schwartz, Steven A. The Big Book of Nintendo Games. Greensboro, USA: Compute Books, 1991.

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Pilkey, Deborah F., Walter D. Pilkey, and Zhuming Bi. Peterson's Stress Concentration Factors. Wiley & Sons, Incorporated, John, 2020.

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Pilkey, Walter D. Peterson's Stress Concentration Factors. Wiley & Sons, Incorporated, John, 2008.

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Pilkey, Deborah F., Walter D. Pilkey, and Zhuming Bi. Peterson's Stress Concentration Factors. Wiley & Sons, Limited, John, 2020.

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Pilkey, Deborah F., Walter D. Pilkey, and Zhuming Bi. Peterson's Stress Concentration Factors. Wiley & Sons, Incorporated, John, 2020.

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Book chapters on the topic "Stress Concentration Factors"

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Paruolo, Nathalia, Bianca Pinheiro, Thalita Mello, and Ilson Paranhos Pasqualino. "Stress Concentration Factors on Welded Tubular Joints." In Lecture Notes in Civil Engineering, 681–700. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4672-3_42.

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Lombardi, Cristian, Bianca Pinheiro, and Ilson Paranhos Pasqualino. "Stress Concentration Factors of Damaged Ship Side Panels." In Lecture Notes in Civil Engineering, 291–304. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4672-3_18.

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Packer, Jeffrey A., George S. Frater, and Kim S. Elliott. "Experimental Determination of Strain Concentration Factors in RHS Truss Gap K-Connections." In Applied Stress Analysis, 316–25. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0779-9_31.

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Fricker, D. C. "Stress Concentration Factors For Intersecting Arrays of Notches In Beams Under Pure Bending." In Applied Stress Analysis, 131–39. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0779-9_13.

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Ritz, F., T. Beck, and S. Kovacs. "Fatigue behavior of X10CrNiMoV12-2-2 under the influence of mean loads and stress concentration factors in the very high cycle fatigue regime." In Fatigue of Materials at Very High Numbers of Loading Cycles, 253–72. Wiesbaden: Springer Fachmedien Wiesbaden, 2018. http://dx.doi.org/10.1007/978-3-658-24531-3_12.

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Satish, Jajula, Shubhashis Sanyal, and Shubhankar Bhowmick. "Effect of Temperature on Stress Concentration Factor." In Lecture Notes in Mechanical Engineering, 641–48. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1124-0_55.

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Kachanov, Mark, Boris Shafiro, and Igor Tsukrov. "Basic stress intensity factors (SIFs) and stress concentrations (2-D configurations)." In Handbook of Elasticity Solutions, 283–303. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0169-3_11.

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Sugiura, Masakatsu, and Masaichiro Seika. "Dynamic Stress Analysis of a Three-Dimensional Solid Body (Dynamic Stress Concentration Factor around a Cavity)." In Applied Stress Analysis, 336–45. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0779-9_33.

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Calì, Michele, Salvatore Massimo Oliveri, and Marco Evangelos Biancolini. "Thread Couplings Stress Analysis by Radial Basis Functions Mesh Morphing." In Lecture Notes in Mechanical Engineering, 114–20. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70566-4_19.

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AbstractTraditional analytical methods are approximate and need to be validated when it comes to predict the tensional behavior of thread coupling. Numerical finite element simulations help engineers come up with the optimum design, although the latter depends on the constraints and load conditions of the thread couplings which are often variable during the system functioning. The present work illustrates a new method based on Radial Basis Functions Mesh Morphing formulation to optimize the stress concentration in thread couplings which is subject to variable loads and constraints. In particular, thread root and fillet under-head drawings for metric ISO thread, which are the most commonly used thread connection, are optimized with Radial Basis Functions Mesh Morphing. In metric ISO threaded connection, the root shape and the fillet under the head are circular, and from shape optimization for minimum stress concentration it is well known that the circular shape becomes seldom optimal. The study is carried out to enhance the stress concentration factor with a simple geometric parameterization using two design variables. Radial Basis Functions Mesh Morphing formulation, performed with a simple geometric parameterization, has allowed to obtain a stress reduction of up to 12%; some similarities are found in the optimized designs leading to the proposal of a new standard. The reductions in the stress are achieved by rather simple changes made to the cutting tool.
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Hodhigere, Yuvaraj, Jyoti S. Jha, Asim Tewari, and Sushil Mishra. "Finite Element Analysis-Based Approach for Stress Concentration Factor Calculation." In Lecture Notes in Mechanical Engineering, 1–6. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6002-1_1.

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Conference papers on the topic "Stress Concentration Factors"

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Pinheiro, Bianca de Carvalho, Ilson Paranhos Pasqualino, and Se´rgio Barros da Cunha. "Stress Concentration Factors of Dented Pipelines." In 2006 International Pipeline Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ipc2006-10598.

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A nonlinear finite element model was developed to assess stress concentration factors induced by plain dents on steel pipelines subjected to cyclic internal pressure. The numerical model comprised small strain plasticity and large rotations. Six small-scale experimental tests were carried out to determine the strain behavior of steel pipe models during denting simulation followed by the application of cyclic internal pressure. The finite element model developed was validated through a correlation between numerical and experimental results. A parametric study was accomplished, with the aid of the numerical model, to evaluate stress concentration factors as function of the pipe and dent geometries. Finally, an analytical formulation to estimate stress concentration factors of dented pipelines under internal pressure was proposed. These stress concentration factors can be used in a high cycle fatigue evaluation through S-N curves.
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Pinheiro, Bianca, Ilson Pasqualino, and Nathália de Azevedo. "Stress Concentration Factors of Dented Rigid Risers." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10128.

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Rigid risers are widely employed in the offshore industry nowadays, assuming the vertical (riser tower) or catenary (steel catenary riser, SCR) configurations. During operation, these structures undergo dynamic loads generated by the action of currents and waves. Rigid risers can also be subjected to collision from neighboring vessels or impact of heavy objects launched from them, resulting in the introduction of defects. The possibility of a fatigue failure must be addressed since these defects induce high localized stresses in the damaged section. The aim of this work is to evaluate the stress concentration induced by plain dents on rigid risers under combined dynamic bending and constant tension loads. A finite element model is developed to reproduce denting and spring back processes and estimate the stress concentration on the dented riser under combined bending and tension loads. The model is used in a parametric study to evaluate stress concentration factors (SCFs) for varying dimensions of dents and risers. Analytical formulae are developed considering the results from the parametric study to estimate SCFs of dented risers, which can be used in a theoretical fatigue life study, modifying standard S-N curves, and help to forewarn a fatigue failure.
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Liu, Guanyong, Tae-Hyun Baek, and Myung-Soo Kim. "Stress Concentration Factors in the Stepped Plate." In Electrical and Electronic Engineering 2016. Science & Engineering Research Support soCiety, 2016. http://dx.doi.org/10.14257/astl.2016.130.06.

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Mathews, Gemi Maria, and Althaf M. "Review on Factors Governing Stress Concentration Factor at Tubular Joints." In International Web Conference in Civil Engineering for a Sustainable Planet. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.112.31.

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Tubular structures have become so much in use because of their structural performance and attractive appearance. But at the intersections of these tubular structures (i.e., tubular joints), there is stress concentration which adds the fatigue damage in structures which is exposed to cyclic loads. The stress concentration factor plays a crucial role in the computation of fatigue life of tubular structures exposed to cyclic loads. This paper aims to review the factors governing stress concentration factor at tubular joints.
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Thibaux, Philippe, and Steven Cooreman. "Computation of Stress Concentration Factors for Tubular Joints." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10934.

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Stress concentration factors for tubular joints were computed using solid quadratic elements. The results of the computations are compared with experiments reported in the literature and with expressions reported in the literature and in design codes. An influence of element size and element type was observed, which leads to recommendations regarding element size of four quadratic elements in thickness, which is finer than in different published recommendations. A parametric study was performed, showing that stress concentration factors from the literature are not always conservative, particularly at the crown toe of the chord, while they tend to be overconservative at the chord saddle. The stress concentration factor for the inside of the member was also computed; it is found that it can be close to the stress concentration factor at the weld toe for both the in plane or out of plane bending modes.
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6

Garg, Ajay, and Ravi Tetambe. "Elastic Stress Concentration Factors (Kt) by Stress Gradient Method Using FEA." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/cie-1615.

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Abstract The elastic stress concentration factor, Kt, is critical in determining the life of machines, especially in the case of notched components experiencing high cycle fatigue. This Kt is defined as the ratio of the maximum stress (σmax) at the notch to the nominal stress (σnom) in the region away from the notch effect. For simple geometries such as, plate with a hole, calculation of Kt from either closed form solution or from making simple but valid assumptions is possible [1,2]. However, for complex machine components such data is usually not available in the literature. Using Kt values from the simple geometries may lead to either over or under estimation of the real Kt for such complex geometries. Such error can then further lead to a substandard product or a product which is overdesigned and expensive. Present paper outlines a methodology for computing reasonably accurate elastic stress concentration factor, Kt, using finite element analysis (FEA) tool. The maximum stress (σmax) is readily available from the finite element analysis. The nominal stress (σnom) near the stress concentration is however can not be directly extracted from the FEA results. A novel approach of estimating reasonably accurate σnom is presented in this paper. This approach is based on selecting the correct path at the stress concentration region, post processing the stress and the stress gradient results along that path and identifying the cut of point where stress concentration effect begins to take place. This methodology is first validated using two examples with known Kt and later applied to a real world problem.
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7

Lotsberg, Inge, and Harald Rove. "Stress Concentration Factors for Butt Welds in Plated Structures." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23316.

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Geometric stress concentration factors for butt welds in stiffened plates have been investigated by finite element analysis. The purpose of these analyses has been to establish a data basis that can be used to develop an analytical expression for stress concentration factors (SCF) for butt welds in stiffened plates. The geometry investigated is that typical used in stiffened plates in floating production vessels and ships. The geometry is also considered to be in the relevant range for semisubmersibles. Stress concentration factors are derived at the butt weld in the midway between the longitudinal stiffeners and at butt welds in way of cope holes of the longitudinal stiffener. Based on the performed work an equation accounting for eccentricity of plates due to fabrication tolerances and difference in thickness is derived that also has been included in the DNV Recommended Practice for fatigue analysis.
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Strzelczyk, Andrzej T., and San S. Ho. "Evaluation of Stress Concentration Factors by Finite Element Analysis." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93571.

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In the ASME Code fatigue evaluation, the total stress at the critical region of a structure is often calculated as a product of nominal stress and the SCF (stress concentration factor). The SCF values are usually taken from technical material like the Welding Research Bulletin [1] or Peterson’s Stress Concentration Factors book [2]. However, the published data do not cover all stress concentration cases; furthermore, many results are ambiguous or with limited accuracy. This paper recommends direct evaluation of the stress concentration by finite element analysis. It presents examples of automatic generation of finite element models which apply to practical cases. The examples show that the finite element method is an effective way for stress concentration assessment; the method can give accurate (convergent) results for a wide variety of cases of geometry and loading conditions.
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Chen, Tuanhai, and Guoming Chen. "Stress Concentration Factors in Tubular K-Joints Under Combined Loadings." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20215.

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A numerical method of stress concentration factors (SCFs) in tubular K-joints under combined loadings was proposed, and the loading effects on SCFs were investigated by using this method. Since it couldn’t present the state of stress concentration very well if the displacements were used as the boundary conditions, the load boundary conditions were selected to analyze the stress distribution of the tubular K-joints. In view of the disadvantages of the superposition of stress distributions from each uniaxial loading mode, an alternative method for the calculation of the hot spot stress under combined loadings was provided. In this method, three basic types of basic loadings namely, axial loading, in-plane and out-of-plane bending moments were applied to the tubular joints simultaneously by virtue of the submodeling technique in ANSYS system. Then the stress distributions along the intersection of tubular K-joints under combined loadings were developed directly, and the hot spot stresses were obtained through extrapolation. Finally, according to parametric study, the loading effects of ice thickness and drift direction on SCF distributions and values were studied through this method. The investigation provides the theoretical basis for determining SCF in tubular K-joints under different load cases in evaluating the ice-induced fatigue of offshore platforms, and has very important engineering application value.
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Benjamin, Adilson C., Divino J. S. Cunha, Rita C. C. Silva, Joa˜o N. C. Guerreiro, George C. Campello, and Francisco E. Roveri. "Stress Concentration Factors for a Drilling Riser Containing Corrosion Pits." In ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2007. http://dx.doi.org/10.1115/omae2007-29281.

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The residual fatigue life of a corroded riser joint can be evaluated by means of a fatigue analysis based on S-N data. In this case nominal stresses are determined through a global riser analysis in which the drilling riser is modeled as a tensioned beam subjected to loads throughout its length and with boundary conditions at each end. The effect of the corrosion defects is taken into account multiplying the nominal stresses by stress concentration factors (SCFs) derived by local Finite Element (FE) analyses of the riser joints containing corrosion defects. In this paper stress concentration factors for a drilling riser containing corrosion pits are calculated using solid FE models. These pits are situated on the external surface of the riser joints. Three shapes of corrosion pits are considered: semi spherical, cylindrical wide and cylindrical narrow. Five depths of corrosion pits are considered: 12.6%, 20.1%, 30.2%, 40.3% and 50.3% of the riser wall thickness. The riser outside diameter and the riser wall thickness are 533.4 mm (21 in) and 15.9 mm (0.625 in), respectively.
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Reports on the topic "Stress Concentration Factors"

1

Pao, P. S., and Ronald L. Holtz. Effect of Crack Tip Stress Concentration Factor on Fracture Resistance in Vacuum Environment. Fort Belvoir, VA: Defense Technical Information Center, January 2015. http://dx.doi.org/10.21236/ada614088.

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2

Shoales, Gregory A., and Scott A. Fawaz. Stress Concentration Factor Determination for Various Tensile Test Specimen Configuration by the Finite Element Method Using MSC/PATRAN and MSC/NASTRAN. Fort Belvoir, VA: Defense Technical Information Center, February 2004. http://dx.doi.org/10.21236/ada430477.

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SIEGFRIED, MATTHEW, STEPHEN HARRIS, CHARLES NASH, WESLEY WOODHAM, and THOMAS WHITE. MODELING THE DESTRUCTION OF GLYCOLATE IN THE DEFENSE WASTE PROCESSING FACILITY (DWPF) RECYCLE STREAM AND CONCENTRATION FACTORS FOR GLYCOLATE IN THE 2H EVAPORATOR. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1669099.

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4

Summary of and factors affecting pesticide concentrations in streams and shallow wells of the lower Susquehanna River basin, Pennsylvania and Maryland, 1993-95. US Geological Survey, 2001. http://dx.doi.org/10.3133/wri014012.

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