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本文运用弹塑性有限变形理论讨论了受压层合圆板层间剥离的扩展。初始缺陷的层间裂纹有一段稳定期,当压缩量超过临界值后,裂纹首先在缺陷层内迅速扩展并很快涉及邻近的各层。文中给出了裂纹扩展情况及应力分布的有限元模拟结果。将剥离后的基体层用小模量的弹性体替代,可避免确定剥离面分离或接触的难点,使计算大为简化。
In this paper, the application of elastic-plastic finite deformation theory to discuss the expansion of pressure-laminated circular delamination. The interlaminar cracks in the initial defects have a period of stability. When the compressive strength exceeds the critical value, the cracks first rapidly expand in the defect layer and soon involve the adjacent layers. In this paper, the finite element simulation results of crack propagation and stress distribution are given. Replacing the peeled base layer with a small modulus elastomer can avoid the difficulty of determining the separation or contact of the peeled surface and greatly simplify the calculation.