基于连续损伤模型的复合材料波纹梁压溃分析

复合材料的耐撞性受到了广泛重视,而波纹梁因其优异的抗屈曲构型被广泛应用于飞机翼梁和直升机底板等经常发生碰撞的结构中。进行了复合材料波纹梁的屈曲分析,研究了高度对波纹梁破坏模式的影响。建立复合材料波纹梁的连续损伤单波模型,层内基于Hashin判据建立含损伤因子的损伤刚度矩阵,层间根据二次名义应力准则和B-K准则模拟损伤演化,并通过典型复合材料波纹梁压溃试验验证了所建立模型的正确性。基于单波分析模型,通过施加周期性边界条件和反对称边界条件,研究了多波结构的吸能特性。

Collapse Analysis of Composite Corrugated Beams Based on Progressive Damage Model

The impact resistance of composite materials has been widely valued, and corrugated beams are widely used in aircraft spar and helicopter floor structures that often collide due to their excellent buckling-resistant configuration. The buckling analysis of corrugated composite beams is performed, and the effect of height on the failure mode of corrugated beams is studied. A single-wave continuous damage model for composite corrugated beams is established. The damage stiffness matrix with damage factors is established in the layers based on the Hashin criterion. The damage evolution is simulated between the layers according to the quadratic nominal stress criterion and B-K criterion. The burst test verifies the correctness of the model. Based on the single-wave analysis model, the energy absorption characteristics of multi-wave structures are studied by applying periodic boundary conditions and antisymmetric boundary conditions.