Abstract
An inelastic bifurcation buckling of symmetrically laminated metal matrix composite (MMC) plates under non-uniform thermal loading is analyzed. The metallic matrix is modeled as a thermoelasto-viscoplastic material with temperature-dependent properties (both elastic and viscoplastic). This suggests that, in the prebuckling state, a MMC plate should be considered as a statistically non-homogeneous thermoelasto-viscoplastic structure. To treat the problem, a method based on a combination of micromechanical and structural analyses is used. As a result, a buckling criterion, incorporating the effective instantaneous constitutive behaviour at every point of the plate at each increment of thermal loading, is obtained. Results are presented for simply supported and clamped SiC/Ti plates. The effects of length-to-thickness and aspect ratios, lamination angle, fiber volume fraction, and different types of spatial temperature distributions on the critical buckling temperature are illustrated. Comparisons with the results obtained using an approach that treats the effect, of temperature-dependent material properties in a simplified manner, are presented. Comparisons with the corresponding elastic solutions, obtained by neglecting the inelastic effects in the metallic matrix, are given.
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