Abstract
The three-dimensional thermoelastic stresses in a circular cylindrical crystal are considered. The crystal is modelled as a cubically–orthotropic linear elastic solid, with three independent elastic properties. The cubic anisotropy renders the problem asymmetric, despite the axi-symmetry of the geometry and thermal loading. A general perturbation solution technique is described, valid for cubic crystals with weak anisotropy. The deviation of the elastic moduli tensor from that of an isotropic material is used as a perturbation parameter. Numerical results are presented for a GaAs boule grown in an LEC process, as a function of the anisotropy parameter.
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