中文摘要：

运用ABAQUS软件对复合材料层合板低速冲击下的损伤状态进行模拟,采用单一变量法,以损伤面积为表征参数,针对影响低速冲击下复合材料层合板损伤性能的诸多因素进行分析,以便在材料研制的初期预见其损伤阻抗。分层损伤是层合板低速冲击下的主要损伤形式之一,基于损伤力学、断裂力学和黏性理论,建立零厚度的三维界面单元来精确模拟层间分层。拐点是损伤阻抗的主要表征,基于试验研究和有限元模拟,在冲击力-时间曲线上计算出拐点,通过比较不同材料的拐点值,判定不同层合板的损伤阻抗。低速落锤冲击试验验证了此模型的合理性。

英文摘要：

Damage of composite laminates due to low-velocity impact depends on number of factors.The simulation of composite laminates damage is carried out with ABAQUS software.Several influence factors are analyzed in order to foresee the damage resistance of composite laminates in the early stage with the method which regards damage area as the single-variable parameter.Delamination is one of leading damage forms of laminates.Based on damage mechanics,fracture mechanics and cohesive theory,cohesive unites are constituted in this paper to simulate delamination accurately.The point of inflexion is a central characterization of damage resistance.Based on the experiments and finite element model,damage resistances of different laminates are determined by contrasting diverse inflexion value which can be calculated on impact force-time curves.The rationality of the model has been confirmed by the low-velocity impact test.