In order to apply the Berger method to the large thermal bending of sandwich plates, a modified method which employs average face strains is presented. The governing field equations are derived by the variational calculus for a thermal stress field when reduced strain energy is used, and they are formulated quasi-linearly with respect to the deflection and the differences of in-plane displacements on each face. As in the case of elastic plates, we may analyse sandwich plates that undergo thermal effects as well as mechanical loading with relative ease by the present method.
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