不同铺层厚度复合材料的低速冲击特性与损伤模式研究  

Impact Behaviors and Damage Modes of Composites Under Low-Velocity Impact With Different Layup Thicknesses

作　　者：郝扣安[1] 王振清[1] 周利民[2] 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,哈尔滨150001 [2]香港理工大学机械工程系

出　　处：《应用数学和力学》2013年第7期661-671,共11页Applied Mathematics and Mechanics

基　　金：国家自然科学基金资助项目(11272096);高等学校博士学科点专项科研基金资助项目(20112304110015)

摘　　要：复合材料凭借其轻质、高强的特性逐渐在工程材料界占据重要地位,对于复合材料的冲击损伤的研究也一直吸引着诸多研究学者的关注.为表征不同铺层厚度复合材料层合板的抗冲击性能,利用自由落体冲击设备,进行了复合材料层合板的冲击实验研究.给出了不同冲击能量下的损伤模式,并利用位移、速度、接触力以及能量的时间变化曲线,深入分析了侵入和穿透两种损伤模式的特点.研究发现,随着铺层厚度的增加,复合材料在冲击过程中吸收的能量也随之增加.引入能量平衡法,基于体系的能量守恒定律,利用Newton-Raphson数值方法求解了侵入损伤模式下的接触力大小,通过实验结果给定挠度求解了对应的速率变化情况,并将理论结果与实验结果进行比较.Characteristics such as light weight and high strength, have made composite one of the most promising engineering materials, and its damage performance under impact has attrac- ted many researchers＇ attention. The low-velocity impact test based on the free-ball impact de- vice was employed to study the impact properties of composites with different thickness. The features of damage modes were analyzed, and were summarized in aspects of relationships be- tween deflection, velocity, contact force, energy and time. It was found that the energy ab- sorbed by composites increased with the thickness. The energy balanced model was introduced based on the principle of conservation of total energy, and the resulting equation was solved with Newton-Raphson numerical technique. The energy balanced model results were compared with the experimental results.

关 键 词：复合材料 低速冲击 损伤模式 能量平衡法 

分 类 号：O346[理学—固体力学]