反对称正交铺层层板的热稳定

1.导言 复合材料结构在外载作用下力学响应由于温度的变化,层板的稳定问题的研究才刚开始涉及。热失稳问题在层板结构的应用中可能会产生,比如当宇航器在外层空间飞行时,由于受到太阳的幅射,温度改变而使层板失稳。国外有不少学者已开始这方面的研究,然而大都还限于经典理论范畴。本文提供的层板临界失稳温度控制方程是在Kirchhoff假设基础上考虑横向剪切变形影响后得来的,对于反对称正交铺设层板,可以找到解析解,并将结果与对称正交层板、经典理论结果作了比较,本文的结论对层板热稳定设计有一定

THERMAL BUCKLING OF ANTISYMMETRIC CROSS-PLY LAMINATED COMPOSITE PLATES

Buckling of antisymmetric cross-ply laminated composite plates due to temperature changes is investigated in this paper. Displacement equations including the effect of transverse shear deformation are derived for determing critical buckling temperatures. Exact solutions for simply supported antisymmetric cross-ply laminates are obtained and the results are compared with the classical lamination theory and symmetric cross-ply laminates. Numerical results indicate that the transverse shear deformation and coupling have significant effect on the thermal buckling behaviour. The present theory predicts the thermal buckling more accurately when compared to the classical lamination theory.