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Dissertations / Theses on the topic 'Thermal and optical stress'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Kylner, Carina. "Light scattering for analysis of thermal stress induced deformation in thin metal films." Doctoral thesis, KTH, Fysik, 1997. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2547.

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Today, thin film based devices are found in a wide field of applications. The main reasons are that thin film technology enables access to unique physical properties and possibilities to miniaturize devices. Thin film devices are generally described in terms such as electrical, optical and magnetical properties. However, the lifetime of these devices is often limited by mechanical stresses causing plastic deformation. An effect of the plastic deformation is hillocking where isolated features are created on the film surface. The continual need to improve performance, reduce size as well as cost

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2

Amazirh, Abdelhakim. "Monitoring crops water needs at high spatio-temporal resolution by synergy of optical/thermal and radar observations." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30101.

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L'optimisation de la gestion de l'eau en agriculture est essentielle dans les zones semi-arides afin de préserver les ressources en eau qui sont déjà faibles et erratiques dues à des actions humaines et au changement climatique. Cette thèse vise à utiliser la synergie des observations de télédétection multispectrales (données radar, optiques et thermiques) pour un suivi à haute résolution spatio-temporelle des besoins en eau des cultures. Dans ce contexte, différentes approches utilisant divers capteurs (Landsat-7/8, Sentinel-1 et MODIS) ont été developpées pour apporter une information sur l'

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3

Schulze, Christopher A. [Verfasser]. "Minimizing Thermal Stress in Glass Production Processes : Model Reduction and Optimal Control / Christopher A Schulze." Aachen : Shaker, 2007. http://d-nb.info/1166509206/34.

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4

Åberg, Jonas. "On the Experimental Determination of Damping of Metals and Calculation of Thermal Stresses in Solidifying Shells." Doctoral thesis, KTH, Materialvetenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4038.

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This thesis explores experimentally and theoretically two different aspects of the properties and behaviour of metals: their ability to damp noise and their susceptibility to crack when solidifying. The first part concerns intrinsic material damping, and is motivated by increased demands from society for reductions in noise emissions. It is a material’s inherent ability to reduce its vibration level, and hence noise emission, and transform its kinetic energy into a temperature increase. To design new materials with increased intrinsic material damping, we need to be able to measure it. In this

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5

Lankford, Maggie E. "Measurement of Thermo-Mechanical Properties of Co-Sputtered SiO2-Ta2O5 Thin Films." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1627653071556618.

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6

Kravchenko, Grygoriy A. "Crack patterns in thin films and X-ray optics thermal deformations." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002770.

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7

Yi, Duo. "Intégration de capteurs à fibre optique par projection thermique pour des applications de contrôle de structures intelligentes." Thesis, Belfort-Montbéliard, 2016. http://www.theses.fr/2016BELF0285/document.

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Ce mémoire présente la modélisation, la simulation, l’expérimentation et la conception d’une structure composite intelligente pour des mesures de haute température (jusqu’à 300 °C). Pour ce faire, une fibre à revêtement métallique, particulièrement résistante pour de tels niveaux thermiques, a été considérée et intégrée au sein d’un revêtement d'alumine. La structure composite intelligente se compose alors du substrat, du dépôt et d’un capteur à fibre optique à modulation d’intensité. Pour mener cette étude, une estimation des flux thermiques basée sur le thermogramme expérimental s’est révélé

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8

Zhang, Bufa. "Optical methods of thermal diffusivity measurement." Thesis, London South Bank University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336374.

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9

Vuppala, Archana. "Thermal and thermal stress analyses of the state-changing tooling." abstract and full text PDF (free order & download UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1460787.

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10

Sun, Mengyue SUN. "Optical sensor for normal stress distribution." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525432600494617.

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11

Koetniyon, Saiprasit. "Thermal stress analysis of automotive disc brakes." Thesis, University of Leeds, 2000. http://etheses.whiterose.ac.uk/2938/.

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A brake disc rotor forms pan of a foundation brake and rotates with the wheel hub assembly. The main function of a foundation brake is to generate a retarding torque by converting mechanical energy to thermal energy by virtue of the frictional work done in relative sliding at the rotor-pad interface. In practice, most brake discs arc made from cast iron and in use arc sometimes subjected to high thermal stresses which can lead to permanent plastic deformation and occasionally rotor cracking. The aim of the present work is to investigate the thermal response of such a cast iron brake disc using

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12

Hu, Yajie. "Thermal Barrier Coating Modeling for Stress Analysis." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42668.

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Thermal barrier coatings (TBCs) have been used widely in aerospace and land-based gas turbines. The TBC system consists of a top coat layer, a thermally grown oxide (TGO), a bond coat layer and a substrate. The growth kinetics of the TGO significantly affects the durability of TBCs. At a critical TGO thickness, the growth stresses exceed the ceramic-bond coat interface strength, resulting in TBC system failure. Regardless of the deposition method used, it is vitally important to accurately predict the TBC lifetime by investigating the determinants of the failure. The main objective of this stu

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13

Hosie, Andrew. "Differentiating thermal from non-thermal eccrine sweating during exercise and heat stress." Access electronically, 2002. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20041105.114628/index.html.

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14

Liang, L. H., and Y. G. Wei. "Ultralow Thermal Conductivity and Thermal Stress of Ceramics with Surface Nanowire-structures." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/34880.

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An analytical model on the size and fraction dependent thermal conductivity, elastic modulus and thermal stress of nanowire-composites are developed, and the theoretical prediction agrees with the experimental results of Si nanowires. And the model proposes that the high thermal shock strength of ceramics can be achieved by surface nanostructurization, which is related to the low thermal conductivity and thermal stress of the nanostructures and voids. The theory will be helpful to guide design of thermal barrier coatings. When you are citing the document, use the following link http://ess

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15

Moon, Il Kweon. "Optical performance of bimetallic mirrors in thermal environments." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/279805.

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Evaluation of the optical performances of bimetallic mirrors with various substrate shapes was conducted using the finite element analysis program, SDRC-IDEAS. In these analyses, two different plating materials, nickel and aluminum were considered for an aluminum and a beryllium mirror substrate. Thermal environments used in this study are: a unit thermal soak (temperature difference), an axial temperature distribution, and radial temperature distributions on the mirror substrate. The goal of this study is to optimize the optical surface quality for various plating thicknessess. Surface errors

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16

Roshan, Fekr Masoud. "Stress analysis of an optical ground wire." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0034/NQ64657.pdf.

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17

Pandhari, Abhijit. "Modeling of thermal stress cycling in refractory materials." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/62359.

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In metallurgical reactors, the thermal stress field of refractories always changes with the heat transfer conditions at the hot-face. It is suggested that ‘thermally induced refractory cracking’ is often the primary cause of in-service refractory failure but quantitative support for this is lacking. The current work is focussed on studying this aspect by developing an experimentally validated thermomechanical model that considers refractory strength degradation under repeated thermal cycling. A thermo-mechanical model has been developed with ABAQUS to predict thermal stress and damage in a re

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18

Abedian, Ali. "Thermal stress analysis of unidirectional fiber reinforced composites." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0026/NQ32776.pdf.

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19

Rao, Hejamadi Dhananjay. "Thermal stress in concrete slabs under different constraints." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4752.

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Thesis (M.S.)--West Virginia University, 2006.<br>Title from document title page. Document formatted into pages; contains viii, 127 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 123-126).

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20

Walker, Breanna E. "The Effects of Thermal Stress on Balanus glandula." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/scripps_theses/189.

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Global climate change has become an increasing source of concern due to the recent build-up of greenhouses gases in the atmosphere. The rocky intertidal zone, as the interface between land and sea, is particularly vulnerable to climate change. Many inhabitants of the intertidal zone are sessile and thus experience both terrestrial and aquatic lifestyles at low and high tides, respectively. When emersed at low tide, organisms experience a number of abiotic stresses including heat stress, desiccation stress, and low oxygen availability. Most intertidal organisms have evolved from marine animals

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21

BRAGA, LEDA MARIA PASSOS FARIA. "STRESS ANALYSIS OF THERMAL NATURE UNDER VISCOELATIC BEHAVIOR." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1988. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19060@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Este trabalho apresenta a modelagem teórica e correspondentes soluções numéricas, associadas ao problema de tensões e deformações num cilindro longo de material viscoelástico, submetido a resfriamento em meio homogêneo. Apresentam-se as hipóteses adotadas na caracterização térmica e mecânica do material, bem como procedimentos e resultados experimentais obtidos na aplicação destas suposições e técnicas para a resina poliéster.<br>The problem of computing stress and strain histories under viscoelastic behaviour in a long cylinder

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22

URURAHY, MARCELO FERREIRA PINTO. "THEORETICAL-EXPERIMENTAL THERMAL STRESS ANALYSIS IN VISCOELASTIC CYLINDERS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1991. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19375@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Apresenta-se neste trabalho o desenvolvimento de um modelo teórico-numérico baseado na Teoria da Viscoelasticidade Linear capaz de prever as distribuições transientes e residuais das componentes de tensão e de deformação de um cilindro polimérico longo submetido a resfriamento brusco. Descrevem-se, ainda, os procedimentos experimentais adotados como intuito de se determinarem algumas propriedades térmicas e mecânicas do sistema epóxi DER331/XG0103/XB81215. Finalmente, comparam-se os resultados fornecidos pelo modelo teórico-numéri

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23

Ntsoane, T. P. "Residual stress in Pt coatings under thermal influence." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/8778.

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Includes bibliographical references.<br>Resistance thermometers are commonly employed when accurate temperature measurements are required. The detection part consists of a thin metallic ﬁlm deposited on a ceramic substrate. In this work, commercially manufactured Pt-Al₂O₃ composites annealed at 0°C, 300°C, 600°C and 1170°C above room temperature were investigated for residual stress using the non-destructive X-ray diffraction technique. The apparatus used for the investigation was a Ψ-goniometer with a scintillation detector. The measured data were analysed with "sin²Ψ"-method. The total stres

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24

Morris, Nathan Bradley. "Physical and physiological considerations for mitigating thermal stress." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/17916.

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To determine the type of intervention which best mitigates thermal stress within a given context, two important factors need to be taken into account: the specific characteristics of the ambient environment (temperature, humidity, air speed and mean radiant temperature) and how the thermoregulatory control system will detect and potentially physiologically compensate the applied intervention. The purpose of the present thesis was to further explore these concepts and apply newly generated knowledge to the presently pressing context of human adaptation to heatwaves. The purpose of Studies 1-3 w

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25

Radhakrishnan, Sadhana. "Stress Analysis of Embedded Devices Under Thermal Cycling." PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4075.

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Embedded active and passive devices has been increasingly used by in order to integrate more functions inside the same or smaller size device and to meet the need for better electrical performance of the component assemblies. Solder joints have been used in the electronic industry as both structural and electrical interconnections between electronic packages and printed circuit boards (PCB). When solder joints are under thermal cyclic loading, mismatch in coefficients of thermal expansion (CTE) between the printed circuit boards and the solder balls creates thermal strains and stresses on the

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26

Daniel, Gwenaelle Monique. "Optical and thermal transport modelling of laser-tissue interaction." Thesis, University of the West of England, Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392811.

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27

Wolters, Stephen D. "Thermal infrared and optical observations of near-Earth asteroids." Thesis, Open University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437781.

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28

Johnson, Jeremy A. (Jeremy Andrew). "Optical characterization of complex mechanical and thermal transport properties." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68543.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2011.<br>Page 176 blank. Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 163-175).<br>Time-resolved impulsive stimulated light scattering (ISS), also known as transient grating spectroscopy, was used to investigate phonon mediated thermal transport in semiconductors and mechanical degrees of freedom linked to structural relaxation in supercooled liquids. In ISS measurements, short optical pulses are crossed to produce a periodic excitation profile in or at the surface of the sample. Lig

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29

Magnabosco, Marina. "Self localization and mapping using optical and thermal imagery." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/6704.

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Given a mobile robot starting from an unknown position in an unknown environment, with the task of explores the surroundings, it has to be able to build an environmental map and localize itself inside that map. Achieving a solution of this problem allows the exploration of area that can be dangerous or inaccessible for humans. In our implementation we decide to use two primary sensors for the environment exploration: an optical and a thermal camera. Prior work on the combined use of optical and thermal sensors for the Simultaneous Localization And Mapping (SLAM) problem is limited. The innovat

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30

Evans, Craig A. "The optical and thermal properties of quantum cascade lasers." Thesis, University of Leeds, 2008. http://etheses.whiterose.ac.uk/5079/.

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The optical and thermal properties of quantum cascade lasers (QCLs) are investigated through the development of comprehensive theoretical models. The optical properties of various multilayer quantum cascade laser waveguides are investigated by solving Maxwell’s equations using a transfer-matrix method. The complex material refractive indices are calculated using a Drude-Lorentz model which takes into account both phonon and plasma contributions to the material properties. A Caughey-Thomas-like mobility model is used to estimate the temperature dependence of the electron mobility which is found

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31

Šumić, Mersiha. "Thermal Performance of a Solarus CPC-Thermal Collector." Thesis, Högskolan Dalarna, Energi och miljöteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:du-14526.

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The aim of this master thesis is an investigation of the thermal performance of a thermal compound parabolic concentrating (CPC) collector from Solarus. The collector consists of two troughs with absorbers which are coated with different types of paint with unknown properties. The lower and upper trough of the collector have been tested individually. In order to accomplish the performance of the two collectors, a thorough literature study in the fields of CPC technology, various test methods, test standards for solar thermal collectors as

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32

Boussoufi, Félix. "Nanocristaux semi-conducteurs colloïdaux pour dispositifs opto-électroniques : synthèse et stabilité sous contraintes thermiques et optiques." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS231.

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Les nanocristaux semi-conducteurs colloïdaux sont devenus durant ces trente dernières années une classe de matériaux pouvant adresser de nouvelles solutions technologiques pour un grand nombre d’applications : diodes électroluminescentes, panneaux solaires, photodétecteurs infrarouges, systèmes d’imagerie médicale, etc. Néanmoins ces nanocristaux sont confrontés à une faible stabilité de leurs propriétés opto-électroniques face à des contraintes externes (chaleur, lumière, humidité, oxygène), limitant leur utilisation dans de nombreuses applications. Il est donc aujourd’hui nécessaire d’étudie

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33

Lu, Kaichang. "Design problems in infra-red optical systems." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339522.

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34

Mallick, Vishal. "Stress analysis of metal/CFRP adhesive joints subjected to the effects of thermal stress." Thesis, University of Bristol, 1989. http://hdl.handle.net/1983/4b861d50-c290-4ea9-a3ac-94d9b39dfaa6.

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35

Cockcroft, Steven Lee. "Thermal stress analysis of fused-cast Monofrax-S refractories." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30991.

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Mathematical models of heat flow and elastic stress generation based on the finite-element method have been developed and utilized to analyze the Epic-3 Monofrax-S casting process (Monofrax-S is primarily composed of 47-57% A1₂O₃, 34-41% ZrO₂ and 10-15% SiO₂). The results of the mathematical analysis, in conjunction with information obtained from a comprehensive industrial study, has led to the development of mechanisms for the formation of the various crack types found in this casting process. Thermal stresses have been predicted to be generated early in the solidification process in associ

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36

Bosomworth, P. A. "Thermal stress damage resistance of gel-bonded magnesia refractories." Thesis, University of Leeds, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371841.

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37

Soomro, A. B. "The generation of thermal stress and strain during quenching." Thesis, Sheffield Hallam University, 1986. http://shura.shu.ac.uk/20385/.

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A viscoelastic-plastic mathematical model was used to calculate the thermal stress and strain generated during the quenching of an infinite plate of high hardenability steel (835M30) in water, oil and Polymer. In the present work the mathematical model was modified to include the effect of initial stress on the rate of stress relaxation, which has been found to be significant. The data required to incorporate this effect into the calculations, were obtained experimentally during the-.present investigation. The effect of an applied stress during transformation (transformation plasticity) was al

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38

Chen, Chung-Yu, and 陳忠佑. "Thermal Stress Analysis for Multi-Channel MT Ferrule and Optical Design for Optical Fiber Package." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/80989919504515166430.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>92<br>In recent years, the global communication and internet have been more and more popular. In order to support high fiber count and dense optical connection demand for high-power optical fiber delivery system, multi-fiber with SFF (Small Form Factor) will for sure be the optical fiber connectors in the future and the development of MT connectors will especially become the main trend. The end face cracking of multimode optical fiber will likely be created in epoxy-curing, cleaving and polishing during the assembly process of connector and there will be problems of

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張振裕. "The thermal stress analysis of the forming mold of glass optical elments." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/23338637118457629891.

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Lin, Chi-Chau, and 林啟超. "The Study on the Stress and Fatigue Life in Ferrule-Epoxy-Fiber Module of Optical Fiber Connector under Thermal Cycling." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/17859809882357740553.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>91<br>The effects of different ferrule length and epoxy layer thickness of the module of optical fiber connector under thermal cycling are investigated in this thesis. The finite element method package, MSC. MARC, is used in this study and the coupled thermal-elastic-plastic model is employed in the analysis. The mechanical behavior and life prediction with different length of ferrule and thickness of epoxy layer are considered. It is shown that the thickness of epoxy layer has the major effect on the life of the module. The stress and strain in the fiber and ep

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Mow-Lowry, Conor Malcolm. "Thermal noise and optical cooling." Phd thesis, 2011. http://hdl.handle.net/1885/150253.

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Thermal noise and optical quantum noise place fundamental limits on the displacement sensitivity of interferometric gravitational wave detectors. Projects such as Advanced LIGO employ a wide range of techniques to reduce thermal noise and use very high optical powers to reduce quantum noise. Thermal noise is Brownian motion caused by the thermal energy in each mode of oscillation. It is fundamentally linked with mechanical loss via the fluctuation-dissipation theorem. The thermal energy of, for example, the fundamental resonance of the suspension of a mirror can be concentrated into the reson

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"Stress-engineered optical elements." UNIVERSITY OF ROCHESTER, 2008. http://pqdtopen.proquest.com/#viewpdf?dispub=3300620.

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Hong, C. C., and 洪志強. "INTERLAMINAR STRESS AND THERMAL STRESS ANALYSES OF LAMINATED PLATES." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/18164329162890659488.

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博士<br>國立中興大學<br>應用數學系<br>87<br>In the part of the interlaminar stresses analyses, a stress-function-based variational approach is used to determine the interlaminar stresses in a multilayered strip of laminate subject to arbitrary combinations of axial extension, bending, the steady and the unsteady aerodynamic loading of fluid flow over the upper surface of laminated composite plate. The finite difference method for determining the interlaminar stresses in a laminated strip is used. Symmetric four-layer, cross-ply and angle-ply laminates are considered in detail. Some numerical solutions by u

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Wen-TungYang and 楊文通. "Analogies between optical and thermal propagation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/rjwt9f.

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碩士<br>國立成功大學<br>光電科學與工程學系<br>105<br>A analogy between optical and thermal propagation in heterogeneous anisotropic media had been proposed recently. All thermal parameters are related to optical ones in artificial metallic media, thus making possible to use numerical codes developed for optics. Our develops and analyzes a metamaterial for heat dissipation. Similar photonic crystal, some frequency of photonic can penetrate, another frequency of photonic can’t penetrate. Electromagnetic and heat diffusion simulations based on the finite element method (FEM) are accomplished to verify that the de

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Wang, Jenq-Chyi, and 汪正祺. "Thermal stress analysis of semiconductor wafers in rapid thermal processing." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/88438136622610522548.

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碩士<br>國立成功大學<br>機械工程學系<br>86<br>Thermal stresses are an important consideration in production processes involving large temperature changes. Recently, Thermal stresses have also become significant in semiconductors related to wafers. To calculate the thermal stresses, we analysis four kinds of boundary conditions. This article investigates the thermal stress in a 8 inch wafer with its surfaces subjected to heat radiation. In order to obtain the solution of the governing equation, which i

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Abdo, Amr Yehia. "Modeling of the thermal response and the thermal distortion of optical mask during optical lithography exposure process." 1999. http://catalog.hathitrust.org/api/volumes/oclc/44731843.html.

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Huang, Chih-Hung, and 黃志宏. "Thermal Stress Analysis of Electronic Packages." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/83014860367136633742.

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碩士<br>國立交通大學<br>機械工程系<br>88<br>The aim of this study is to investigate the failure behavior induced by thermal cyclic loading of the Thermal -Enhanced PBGA. In this study, thermal stress analyses of Au wire, interfaces of different materials and solder balls are carried out by using ANSYS finite element simulation code. In addition, local heat transfer coefficients distribution is used to simulate conjugate heat transfer problem on the package surfaces. Results show that there are defects happed in some positions contacted with heat spreader. Cracks in the chip corner points and fat

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Chen, Yao-Shing, and 陳耀星. "Thermal Stress Measurements in Electronics Packages by Piezoresistive Stress Sensor." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/76763367609882783074.

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碩士<br>中正理工學院<br>電機工程研究所<br>87<br>ABSTRACT The purpose of this article is quantitatively extracting the stress distribution in microelectronics packages through in-situ and non-destructive measurements. To this end, the P-type and N-type piezoresistive stress sensors were first designed and manufactured by conventional IC process. Secondly, the stress sensors were packaged and the resistance variations of the sensors were measured at different temperature so that the relationship between stress distribution and temperature were extracted according to the piezoresistive t

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Liu, Kun-I., and 劉坤一. "Transient Thermal Stress and Residual Stress analysis in Plate Welding." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/18338594692718581054.

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Liu, Kun-Yi, and 劉坤一. "ransient thermal stress and residual stress analysis in plate welding." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/03654790707247342621.

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