Analysis of the thermoelastic response of a semi-space to a short laser pulse

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dc.contributor.advisor Hetnarski, Richard
dc.contributor.advisor Ghoneim, Hany
dc.contributor.advisor Torok, Josef Renz, Gary 2010-07-12T14:43:51Z 2010-07-12T14:43:51Z 1997-05-13
dc.description.abstract A study of the thermoelastic response of a semi-space medium to a short laser pulse generated heat is presented. This study uses the generalized thermoelasticity theory proposed by Green and Lindsay. This theory generalizes the classical theory of thermoelasticity by developing hyperbolic heat conduction equations and temperature-rate dependent constitutive equations. By so doing, an inherent paradox and physically unrealistic result in the classical theory of thermoelasticity that proposes infinite speed of thermal responses through a medium is corrected. Its validity is justified by the satisfaction of Fourier's law by which classical thermoelasticity is based. The Green-Lindsay theory adopts two thermal relaxation times and a thermoelastic coupling constant as specific material parameters to account for finite speed thermoelastic waves. The model presented in this study uses a semi-space medium that has imposed on its boundary a laser induced heat of the form of a product of an exponentially decreasing function of the semi-space depth and a skewed Gaussian temporal profile. A numerical analysis of the exact closed form solution is presented. This analysis reveals that for a fixed cross section of the semi-space depth, the stress-temperature response is represented by a pair of smooth transiental functions of time and display two distinct planar thermal wave fronts of finite speed. en_US
dc.language.iso en_US en_US
dc.relation RIT Scholars content from RIT Digital Media Library has moved from to RIT Scholar Works, please update your feeds & links!
dc.subject Mechanical engineering en_US
dc.subject.lcc QA933 .R469 1997
dc.subject.lcsh Thermoelastic stress analysis--Mathematical models en_US
dc.subject.lcsh Thermoelasticity--Mathematics en_US
dc.title Analysis of the thermoelastic response of a semi-space to a short laser pulse en_US
dc.type Thesis en_US Kate Gleason College of Engineering en_US
dc.description.department Department of Mechanical Engineering en_US

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