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Dissertations / Theses on the topic 'Fatigue strength analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Lester, Charles Gilbert IV. "Analysis of fatigue behavior, fatigue damage and fatigue fracture surfaces of two high strength steels." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42795.

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Building fuel efficient automobiles is increasingly important due to the rising cost of energy. One way to improve fuel efficiency is to reduce the overall automobile weight. Weight reductions using steel components are desirable because of easy integration into existing manufacturing systems. Designing components with Advanced High Strength Steels (AHSS) has allowed for material reductions, while maintaining strength requirements. Two Advanced High Strength steel microstructures investigated in this research utilize different strengthening mechanisms to obtain a desired tensile strength grade

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Ghosh, Abie. "A residual strength approach for the fatigue analysis of welded components /." Title page, contents and abstract only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09ph4275.pdf.

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3

Gordon, Debra Anne. "Analysis of force parameters used to assess the fatigability of mammalian motor units." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184368.

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The investigation of motor-unit fatigability in reduced-animal models has been dominated by a single fatigue test, one fatigue index, and an emphasis on changes in the magnitude of (usually peak) force. Although the standard fatigue test has been reported to elicit changes in the dynamic phases of an isometric tetanus, this has not been systematically studied in single motor units. Furthermore, changes in the profile of individual tetani during the fatigue test have led some investigators to suggest that other force parameters (i.e., integrated force) or fatigue indices may provide additional

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4

Harati, Ebrahim. "Fatigue strength of welds in 800 MPa yield strength steels : Effects of weld toe geometry and residual stress." Licentiate thesis, Högskolan Väst, Avd för tillverkningsprocesser, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-8009.

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Nowadays there is a strong demand for lighter vehicles in order to increase the pay load. Through this the specific fuel consumption is decreased, the amount of greenhouse gases is lowered and the transport economy improved. One possibility to optimize the weight is to make the components from high strength steels and join them by welding. Welding is the main joining method for fabrication of a large proportion of all engineering structures. Many components experience fatigue loading during all or part of their life time and welded connections are often the prime location of fatigue failure.Fa

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5

February, Eugene J. "Analysis of fatigue crack properties of the weld metal of gas metal Arc welded 300WA steel." Thesis, Cape Peninsula University of Technology, 2006. http://hdl.handle.net/20.500.11838/1278.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2006.<br>Welded joints are major causes for concern in the engineering arena for two basic reasons. In the first instance the weld is known to be a region of weakness within a structure and is caused by residual and applied stress concentrations. Secondly, the behaviour of the stress patterns is somewhat difficult to predict accurately due to the difficulty of conforming to the geometry and process parameters. The experimental procedure in this work commenced with specimens being welded with a technique ve

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6

Hayes, Michael David. "Structural Analysis of a Pultruded Composite Beam: Shear Stiffness Determination and Strength and Fatigue Life Predictions." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11066.

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This dissertation is focused on understanding the performance of a particular fiber-reinforced polymeric composite structural beam, a 91.4 cm (36 inch) deep pultruded double-web beam (DWB) designed for bridge construction. Part 1 focuses on calculating the Timoshenko shear stiffness of the DWB and understanding what factors may introduce error in the experimental measurement of the quantity for this and other sections. Laminated beam theory and finite element analysis (FEA) were used to estimate the shear stiffness. Several references in the literature have hypothesized an increase in the e

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7

Han, Hyung-Seop Lim Tae-Hong. "Design of new root-form endosseous dental implant and evaluation of fatigue strength using finite element analysis." Iowa City : University of Iowa, 2009. http://ir.uiowa.edu/etd/294.

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8

Han, Hyung-Seop. "Design of new root-form endosseous dental implant and evaluation of fatigue strength using finite element analysis." Thesis, University of Iowa, 2009. https://ir.uiowa.edu/etd/294.

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The purpose of this study was to investigate the fatigue life of an endosseous root-form dental implant using finite element analysis. A conventional Brånemark dental implant system was redesigned to utilize the biocompatible, lightweight magnesium alloy coating which promotes bone growth. ANSYS Workbench 11.0 was used to generate a three-dimensional mesh of a model created in Pro Engineer with the actual size specifications. Regulations and schematic of test set-up from ISO 14801 - "Fatigue test for endosseous dental implants" were strictly followed to simulate the fatigue test. To validate t

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9

Djukic, Luke Philip Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Effects of thermal residual stresses on static strength and fatigue life of welded carbon-fibre/epoxy composite joints." Awarded By:University of New South Wales. Mechanical & Manufacturing Engineering, 2010. http://handle.unsw.edu.au/1959.4/44619.

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Thermoset Composite Welding (TCW) is a process designed specifically for joining composite materials, developed by the Cooperative Research Centre for Advanced Composite Structures (CRC-ACS). The TCW manufacture process is carried out at higher temperatures than those used in service, causing thermal residual (TR) stresses to develop in the joints. An investigation of the strength of single-lap shear joints (SLJs), and the development of laminate free edge microcracks (LFEMs) is presented in this thesis. The reported investigations are primarily experimental. Finite element analysis has been u

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10

Narayanaswamy, Nitin. "Adhesive modelling in multi-material structures : Evaluating the strength and fatigue life of adhesive joints." Thesis, Linköpings universitet, Mekanik och hållfasthetslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-165507.

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Advancements in material science and manufacturing techniques are enabling the use of lightweight metal alloys and polymer composites in several combinations and shapes for producing more efficient and lightweight structures for automotive applications without compromising strength, stiffness and/or durability. When evaluating the strength of the structure, the joints are of importance. For multi-material structures adhesives are often the best type of joints. However, traditional finite element methods using stress criteria cannot accurately predict the failure of these adhesive joints under

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11

Bow, David Russell. "Mechanical analysis and simulation of the nitrinol ring-stent : assessing the radical strength, fatigue safety and compaction strains." Thesis, University of Strathclyde, 2018. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=30262.

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12

Mumtaz, Noman Ali, and Mansoor Khurshid. "Static and fatigue design of load carrying welded joints in high strength steels : -In collaboration with Cargotec Sweden AB." Thesis, KTH, Lättkonstruktioner, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-77517.

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This thesis work is carried out in Cargotec Sweden AB, Bromma Conquip to study the behavior of load carrying welded joints in different weld metal strength mismatch conditions and various penetration ratios. Static and fatigue strength calculations have been made using FEA and experimentation. The joint in the Telescopic beam of the spreader STS45 has been analyzed. Telescopic beam is one of the critical and main parts in the spreader, which is directly subjected to the load of containers at various ports. Previous studies show that this joint limits the strength of the spreader, it has thus b

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13

Duchoň, Peter. "Analýza spoje křídlo-trup letounu L 410 NG z hlediska filozofie konstrukce s přípustným poškozením." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231189.

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Master's thesis deals with the damage tolerance analysis of wing-to-fuselage joint of L 410 NG airplane. Thesis includes determination of the load distribution to the individual attachments of wing-to-fuselage joint, residual strength analysis and residual fatigue life analysis of the most loaded attachment lugs, calculation of fatigue crack growth curves in the attachment solids and inspection program proposal. This analysis was performed using FE model of the wing and central part of the fuselage and AFGROW software.

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14

Shenoy, Vikram. "Damage characterisation and lifetime prediction of bonded joints under variable amplitude fatigue loading." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/5400.

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Adhesive bonding is one of the most attractive joining techniques for any structural application, including high profile examples in the aerospace, automotive, marine construction and electrical industries. Advantages of adhesive bonding include; superior fatigue performance, better stress distribution and higher stiffness than conventional joining techniques. When the design of bonded joints is considered, fatigue is of critical importance in most structural applications. There are two main issues that are of importance; a) in-service damage characterisation during fatigue loading and, b) lif

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15

Sláma, Ondřej. "Jeřábová kočka 360 t." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377477.

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The topic of this diploma thesis is the frame of the foundry crane with load capacity 360 t. The frame is analysed by strength inspection and fatigue strength inspection according to norm ČSN EN 13001. The analysis are made by using finite element method on shell model. The diploma thesis was made in cooperation with Královopolská a.s. company.

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Klíč, Jan. "Posouzení pevnosti a životnosti hydraulického klapkového uzávěru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231102.

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Theoretical part of this master thesis is focused on the theory of fatigue life. The second part deals with the assesment of static strength the closing flap in front of water turbine. Futher fatigue analysis of the closing flap is performed considering corrosive environment. The aim is to verify the required service lifetime of 50 years.

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Otevřel, Marek. "Rám kočky 330 t mostového licího jeřábu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232036.

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The topic of this diploma thesis is the frame of the foundry trolley crane 330/65/20t. The crane crab is used for handling with molten metal. The frame is analyzed by strength inspection and fatigue strength inspection. The process is according to ČSN EN 13001. The analyses are made by using finite element method on a beam and shell models. The diploma thesis was made in cooperation with the Královopolská a.s. company.

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18

Massart, Thierry Jacques. "Multi-scale modeling of damage in masonry structures." Doctoral thesis, Universite Libre de Bruxelles, 2003. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211218.

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<p align="justify">The conservation of structures of the historical heritage is an increasing concern nowadays for public authorities. The technical design phase of repair operations for these structures is of prime importance. Such operations usually require an estimation of the residual strength and of the potential structural failure modes of structures to optimize the choice of the repairing techniques.</p> <p><p align="justify">Although rules of thumb and codes are widely used, numerical simulations now start to emerge as valuable tools. Such alternative methods may be useful in this resp

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19

Khurshid, Mansoor. "Static and fatigue analyses of welded steel structures : some aspects towards lightweight design." Doctoral thesis, KTH, Lättkonstruktioner, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200829.

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The objectives of this thesis comprise of overcoming the challenges in designing lightweight welded structures such as material selection, choice of fatigue design methods, and increased performance by using improvement techniques. Material selection of welded joints is dependent on the filler and base material strengths. Partially and fully penetrated cruciform and butt welded joints were designed in under-matching, matching, and over-matching filler materials. Base material steel grades were S600MC, S700MC, and S960. Current design rules are developed for welds in steel up to yield strength

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20

Oliveira, Danilo Flamini. "Efeitos de diferentes tratamentos de superfície nas características superficiais, resistência adesiva, estabilidade da adesão e sobrevida de coroas/pilares de Y-TZP obtidos por CAD/CAM após ciclagem termomecânica e fadiga termomecânica acelerada." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-30082017-093307/.

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O estudo avaliou a efetividade de tratamentos de superfície na modificação superficial e adesão da zircônia ao cimento resinoso; a estabilidade de união após ciclagem termomecânica entre coroas metal free com copings em zircônia ou coroas monolíticas em zircônia e pilares personalizados do mesmo material, submetidos a tratamento superficial, e a influência destes na sobrevida dos sistemas protéticos após fadiga termomecânica acelerada. A pesquisa foi desenvolvida em 2 etapas. Na primeira, discos de zircônia foram distribuídos em sete grupos (n=6): G1 (Rocatec); G2 (ácido hidrofluorídrico 40%,

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21

Strommer, Bohumír. "Posouzení rámu kočky mostového magnetového jeřábu 15t 27,5m." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231190.

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The diploma thesis deals with crab frame of bridge magnet crane with lifting capacity 15t used in steel mill for handling billets. Thesis contains strength analysis and fatigue strength check of crab frame based on ČSN EN 13001. Strength analyses are made by using beam and shell models of finite element method. The diploma thesis was carried out in cooperation with Královopolská a.s. company.

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22

Fukushima, Karen Akemi. "Comportamento de fadiga e perfis de tensões residuais de cerâmicas odontológicas." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/23/23140/tde-16042015-100653/.

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Capítulo 1. Objetivos: Medir e comparar o perfil de tensão residual da cerâmica de recobrimento aplicada sobre infraestruturas em zircônia tetragonal policristalina estabilizada por ítria (Y-TZP), em um compósito de alumina/zircônia (ZTA) e em uma alumina policristalina (AL). Material e Métodos: Os perfis de tensão residual de cada um dos materiais foi medido por meio do método \"hole-drilling\" em discos de 19 mm de diâmetro e 2,2 mm de espessura (0,7 mm de infraestrutura + 1,5 mm de porcelana de cobertura) .Resultados: Os espécimes de AL exibiram tensões de compressão que aumentaram numerica

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23

Hart, M. J. Alexandra. "Action in Chronic Fatigue Syndrome: an Enactive Psycho-phenomenological and Semiotic Analysis of Thirty New Zealand Women's Experiences of Suffering and Recovery." Thesis, University of Canterbury. Social and Political Sciences, 2010. http://hdl.handle.net/10092/5294.

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This research into Chronic Fatigue Syndrome (CFS) presents the results of 60 first-person psycho-phenomenological interviews with 30 New Zealand women. The participants were recruited from the Canterbury and Wellington regions, 10 had recovered. Taking a non-dual, non-reductive embodied approach, the phenomenological data was analysed semiotically, using a graph-theoretical cluster analysis to elucidate the large number of resulting categories, and interpreted through the enactive approach to cognitive science. The initial result of the analysis is a comprehensive exploration of the experienc

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24

Anastassiou, Michel. "Influence des conditions de soudage sur les contraintes residuelles dans un point soude par resistance sur toles minces d'acier a bas carbone : relation avec la tenue en fatigue." Paris, ENSAM, 1987. http://www.theses.fr/1987ENAM0012.

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Černý, Martin. "Konstrukční návrh uložení měřící aparatury IMC ve vozidle." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377458.

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Devices for measuring the dynamic load and vibration of certain parts of the bodywork or parts of other parts of the vehicle are made using accelerometers and measuring instruments IMC. It must be simply installed into the interior of the vehicle so that it is not necessary to remove any parts of the interior and to avoid damage to all parts of the interior. The preparation must also withstand the considerable dynamic load generated by the harder operation tests.

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Baglieri, Giulia. "Caratterizzazione a fatica con intaglio di acciai innovativi ultra-alto resistenziali." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Lo scopo della presente ricerca è valutare l’idoneità dell’acciaio da utensili innovativo K890, prodotto da Böhler con metallurgia delle polveri, ad essere impiegato per la realizzazione di componenti motore di moto da corsa, quali alberi a camme e a gomiti, in sostituzione dell’acciaio da nitrurazione GKHW, prodotto da Aubert&Duval con processo ESR (Electro Slag Remelting). Lo studio è stato condotto a valle di una precedente sperimentazione condotta su provini non intagliati ed ha previsto l'esecuzione di prove di trazione e prove di fatica a flessione rotante con intaglio oltre a prove di d

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Wu, Zheng-Wei, and 吳政緯. "Fatigue Strength Analysis of Container Ship by Hydro-Elastic Dynamics." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/83937251722483390178.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>101<br>In accordance with hydro-elastics (HE), this study uses the modal superposition method to examine the hydro-elastic effect from the interaction between ships and waves and the stress distribution of different deformations under a wave load. The study obtained the stress response amplitude operator (RAO) of stress concentrating area to transfer wave spectrum to structure stress spectrum, and then assessed structural fatigue damage and life. A ship sailing on the sea is not only exposed to static pressure from water and weight of the ship and cargo but als

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Wu, Sz-Hao, and 吳偲豪. "Fatigue and ultimate strength analysis of Aluminum alloy high speed craft." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/70871644937759505779.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>102<br>Recently Aluminum alloy has been applied for high speed vessel because its density is 1/3 of steel, and has good corrosion resistance. For aluminum structure not only the equivalent yield strength need be considered, the strength reduction due to heat affected after welding, and relative lower fatigue strength should be taken account, if the design of aluminum structure member is based on the exsisted desing of steel structure, the fatigue life and the ultimate strength of structure member should be assessed. In this work the Palmgren-Miner rule was used

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"Compliant mechanisms design with fatigue strength control: a computational framework." Thesis, 2013. http://hdl.handle.net/10388/ETD-2013-06-1100.

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A compliant mechanism gains its motion from the deflection of flexible members or the deformation of one portion of materials with respect to other portions. Design and operation of compliant mechanisms are very important, as most of the natural objects are made of compliant materials mixed with rigid materials, such as the bird wings. The most serious problem with compliant mechanisms is their fatigue problem due to repeating deformation of materials in compliant mechanisms. This thesis presents a study on the computational framework for designing a compliant mechanism under fatigue strength

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Sung, Chun-Ching, and 宋俊卿. "Structural Strength and Fatigue Analysis for a 4D Simulator of Virtual Reality." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/06539822159443680776.

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碩士<br>國立屏東科技大學<br>車輛工程系所<br>103<br>In this research, finite element analysis is used to evaluate structural strength and fatigue analysis of 4D virtual reality simulator in motion and static state. A finite element model of 4D virtual reality simulator is established using software HyperMesh. Static analysis is performed to evaluate the static strength and fatigue life prediction based on EU standard EN 13814 and EN 1993-1-9. Dynamic simulation is then performed based on the scenario of the film of 4D simulator. The movement of platform and seats are driven by six driving cylinders, which are

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Ghosh, Abir. "A residual strength approach for the fatigue analysis of welded components / Abir Ghosh." 1996. http://hdl.handle.net/2440/22490.

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Bibliography: leaves 240-257.<br>xvii, 274 leaves : ill. ; 30 cm.<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>The main objective of this research is to develop a fundamentally new fatigue design and assessment procedure which can be used to predict the variation in crack size, strength and inspection periods as well as endurances. Basic fracture mechanics and fatigue procedures are used to illustrate this new technique.<br>Thesis (Ph.D.)--University of Adelaide, Depts. of Civil & Environmental Engineering and Mechani

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Ko, Chih-Wei, and 柯智瑋. "Experimental Analysis on the Static and Fatigue Strength for Single Lapped Adhesive Specimens." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/76195499396824188693.

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碩士<br>中華大學<br>機械與航太工程研究所<br>95<br>In the industrial, there are a lot of joint in order to accord with the demand, often use adhesive joint method , and there is a lot of joint under the dynamic load environment is used, often cause of the fatigue failure because of adhesive debonding. In the research, the static and fatigue strength of adhesive is using the single lapped joint specimens. Adhesive of the joint specimens use three kinds of adhesive thickness and two kinds of over lap. In the static tests, the static limit of the adhesive joint where measured and recorded, in order to load levels

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Liu, Li-chiu, and 劉麗秋. "Finite Element Analysis of Bending strength and Fatigue Life of Silicon Micro-Cantilever Beams." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/19593967465741875594.

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碩士<br>逢甲大學<br>材料與製造工程所<br>93<br>Abstract This thesis utilizes Finite Element software ANSYS, to analyze and simulate flexural stress-strain behavior of Si micro-cantilever beam subjected to concentrated loading without and with offset. With fatigue S-N curve obtained from experiment in literature as the property of the beam, the micro-cantilever beam with different length and thickness is simulated to subjected several fatigue periods with various amplitude fatigue cycle, and fatigue accumulated damage is calculated. The analysis result shows that the more the concentrated loading is offset

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Liu, Chin-Wei, and 劉晉瑋. "Analysis of Structural Strength and Fatigue for Skid Landing Gears Using Finite Element Method." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/j7t3q6.

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碩士<br>國立臺北科技大學<br>機電整合研究所<br>102<br>The structural safety of landing gear is especially important for helicopter. Landing gear needs to support the weight of the full loaded helicopter and lower the impact while landing. The present study built the models with Solidworks which is a three-dimensional computer-aided software and used finite element method analysis software ANSYS Workbench to analyze skid landing gear models. In the present study, there are four tubular shapes of landing gears have been considered. The present study used static analysis to find out their optimal tilt angle and be

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Hsieh, Chih-Hui, and 謝志輝. "Finite Element Analysis on the Strength and Fatigue Properties of an Automotive Twist Beam." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/8j5fg2.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>106<br>Rear wheel suspension system play an important role in vehicle system. It can determine the comfort and operability of the vehicle. Therefore, it received the attention of industry in design and analysis. About design, it can achieve the desired performance by modified the shape of torsion beam; About accurate analysis, it can be established by CAE finite element software. Use efficient way to understand whether the performance of the design for the torsion beam is feasible or not. This study discusses the establishment of the strength analysis method for tor

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Lian, Wei Guang, and 連偉光. "Failure and fatigue strength analysis of bolted joints in composite laminates with clamp-up effects." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/36254754493964446011.

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Lee, Jyh-Chang, and 李智強. "Experimental Analysis of Fatigue Strength for Composite Laminated Plate with Center Hole under Pretorsional Load." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/44736076302880028976.

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Chen, Han, and 陳翰. "Experimental Analysis on Two-Stage Cumulative Bending Fatigue Strength of Glass/Polypropylene/Aluminum Foam Sandwich Structures." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/37226368935787389700.

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碩士<br>國立臺灣海洋大學<br>機械與機電工程學系<br>101<br>The two-stage cumulative bending fatigue behavior of the sandwich beams with glass/polypropylene laminate faces and aluminum foam cores was experimentally studied in this thesis to elucidate the loading sequence effect of the innovative material. The experimental results show that the sums of the cycle ratios of the two stages are larger than unity no matter in the high-to-low or low-to-high loading cases. Furthermore, the sums of the cycle ratios of the two stages in the low-to-high loading cases are higher than those in the high-to-low cases, indicating

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Chang, Li-Yen, and 張立言. "Experimental Analysis on The Static and Fatigue Strength for Aluminum Honeycomb Sandwich Strctures under Bending Loading." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/60691397389029837313.

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碩士<br>中華大學<br>機械與航太工程研究所<br>94<br>The static and fatigue strength for Aluminum honeycomb sandwich plates under four-point bending were experimentally analyzed in the research. The thickness of face sheet; the height and the size of honeycomb cell were considered as the study parameters in the experimental program. Totally seven different kinds of specimens were designed to study the effect of these parameters on the strength of honeycomb sandwich plates. In the static tests, the ultimate strength, local out-of-plane deformation, and in-plane strain on the face sheet of specimens were measure

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李傳華. "= The prediction of fatigue strength and life and the analysis of interlaminar stresses in composite laminates." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/29548188888936809287.

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Cordeiro, Andreia Patricia Santos. "Adaptação portuguesa do questionário Checklist of Individual Strength (CIS20-P) : Análise das propriedades psicométricas”." Master's thesis, 2012. http://hdl.handle.net/10400.12/3781.

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Dissertação de Mestrado apresentada ao ISPA - Instituto Univeristário<br>Objetivo: O objetivo deste estudo foi analisar as propriedades psicométricas da versão portuguesa Checklist of Individual Strength (CIS20-P). Este questionário consiste em quatro dimensões (Fadiga Subjetiva, Concentração, Motivação e Atividade Física) que medem a severidade da fadiga. Método: Foram realizados dois estudos: o primeiro estudo (Estudo 1) analisou as características psicométricas do CIS20-P numa amostra de 431 sujeitos saudáveis (M idades=36; 74,5% género feminino e 25,5% masculino); o segundo estudo (Estudo

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Aghachi, Izendu Emenike Alu. "Dynamic stress analysis of composite structures under elastic wave load : particulate reinforced metal matrix composites." 2012. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000194.

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D. Tech. Mechanical Engineering.<br>Discusses the main objective of this study was to extend the hybrid method developed by Paskaramoorthy, et al (1988). This objective was to study the effect of elastic wave on any particulate reinforced metal matrix composite (PRMMC). The specific objectives were: to compare the effect of plane wave and shear vertical wave on a particular particulate reinforced metal matrix composite (PRMMC)-Mg/TiC, using analytical method ; to use the extended hybrid method to determine the effect of particle size and single interface layer on Mg/TiC.

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Wendler, Jörg. "Tragfähigkeitsberechnung von Bauteilen mit Mehrfachkerben im Nennspannungskonzept." 2019. https://tud.qucosa.de/id/qucosa%3A35202.

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In der Praxis weisen Wellen und Achsen häufig komplex gestaltete oder überlagerte Kerbformen (Mehrfachkerben) auf, die von normativen Methoden zur Berechnung der Ermüdungsfestigkeit nicht erfasst sind. Die vorliegende Arbeit widmet sich daher der Zusammenführung von Kerbspannungsergebnissen einer Finite-Elemente-Analyse mit dem genormten Ermüdungsfestigkeitsnachweis nach DIN 743. Dazu erfolgt die Ableitung einer neuen, spannungsmechanisch begründeten Berechnungsmethode zur Integration von örtlich mehrachsigen Spannungszuständen in den nennspannungsbasierten Tragfähigkeitsnachweis. Die grundleg

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唐自鶴. "Experimental Analysis on Static and Fatigue Bending Strengths of Glass-Polypropylene Composite/Aluminum Foam Sandwich Structures." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/79294648095613251631.

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碩士<br>國立臺灣海洋大學<br>機械與機電工程學系<br>101<br>In this thesis, the static and bending fatigue strengths of the sandwich beams with glass/polypropylene laminate faces and aluminum foam core were experimentally analyzed. The ply directions of the laminate faces, the core heights, and the face thicknesses were considered as the variables in the experimental program. The critical loads for five considered characteristic failure mode, i.e., face failure, local indentation, and three types of core shear failure, were obtained theoretically. The minimum critical load among the five critical loads correspondin

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Wu, Pei-Lin, and 吳沛霖. "Effects of Different Alloys and Printed Circuit Board Surface Finishes on the Intermetallics Growth Microstructure Mechanical Strength and Failure Analysis of Thermomechanical Fatigued Lead-free Solder Joints." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/13116194669934711173.

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博士<br>國立臺灣科技大學<br>化學工程系<br>92<br>This study is to investigate the effects of different alloys and Printed Circuit Board (PCB) surface finishes on the intermetallic compounds (IMCs) growth, microstructure, mechanical strength and failure analysis of thermomechanical fatigued lead-free solder joints. The growth of the IMC between Small Outline J（SOJ）leads and SnAgCu solder depended strongly on the PCB surface finish and thermomechanical fatigue (TMF). The parabolic TMF cycle dependence clearly suggests that the growth processes are controlled primarily by solid-state diffusion. The si

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