Analysis of Residual Stress Distribution in Anisotropic Thermo-Elastic Bimorph Systems

Igor Dobovšek

doi:10.4028/www.scientific.net/AMM.736.74

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 736Analysis of Residual Stress Distribution in...

Analysis of Residual Stress Distribution in Anisotropic Thermo-Elastic Bimorph Systems

Abstract:

We present an analysis of residual stresses in longitudinal and transversal direction of a bimorph element induced by a change in external temperature field due to mismatch in thermal and elastic characteristics in dissimilar two-phase composite material with laminated structure. Representative Volume Element of the system is defined as a heterogeneous two-phase layered element bonded at an interface in a sense of coherent bi-layer, where each phase possesses distinct anisotropic material characteristics. We use a homogenization procedure with particular form of strain field, which satisfies compatibility equations in the bulk and at an interface. Special rule of mixtures derived from a spatial averaging principle yields explicit dependence of through-thickness residual stress on a compositional parameter defined as a volumetric fraction of one phase of the system.

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Periodical:

Applied Mechanics and Materials (Volume 736)

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74-79

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.736.74

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Online since:

March 2015

Authors:

Igor Dobovšek*

Keywords:

Anisotropy, Laminate Structure, Residual Stress, Thermal Mismatch

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