复合材料三角形层板稳定性分析与实验研究

 给出了正交异性三角形简支板和固支板临界载荷的计算方法。对5种不同铺层的14块碳/环氧层板进行了稳定性实验研究。理论预测与实验结果基本一致。

ANALYSIS AND EXPERIMENTAL STUDY OF THE STABILITY OF TRIANGULAR LAMINATED COMPOSITE PLATES

This paper gives a method for calculating critical loads of simply supported and clamped orthotropic triangular plates. For the clamped plates, generalized variational principle and the technique of relaxing boundary conditions to find the low limit of eigenvalues are used to avoid the difficulty of finding the deflection function which exactly satisfies the clamped boundary conditions. To examine the validity of this method, an experimental investigation is carried out and forteen graphite/epoxy laminated plates with five different ply orentations are tested. To apply loads easily, testing specimens are made into rectangular shape and clamped boundary conditions of triangular plates are achieved by triangular frams. Experimental critical loads are determined by Southwell Plot Method. The experimental results agree with the theoretical predictions.