玻璃纤维增强型复合材料层合梁在受轴向质量块冲击时,由于纤维铺层间的粘结强度较小,该区域易出现初始裂纹,进而扩展为脱层损伤。文章探讨了采用有限元数值模拟对脱层的产生与扩展进行建模、计算分析的方法。针对发生在纤维层间的脱层损伤,基于传统的应力失效准则,结合断裂力学的B-K能量失效准则,建立了混合失效准则来定义界面处的损伤规律,将发生脱层的潜在区域定义为粘结接触。计算结果与实验对比具有较好的一致性。 When the glass fiber reinforced composite laminated beam is impacted by the axial mass, the initial crack easily appears in the area due to the small bond strength between the fiber layers, which further expands to the delamination damage. In this paper, the method of modeling and analyzing the generation and expansion of delamination using finite element numerical simulation is discussed. Based on the traditional stress failure criteria and BK energy failure criterion in fracture mechanics, a hybrid failure criterion is established to define the damage law at the interface. The potential area where delamination occurs is defined as viscosity Knot contact. The calculated results are in good agreement with the experimental ones.