复合材料层合板二次低速冲击损伤扩展研究  

Research on Secondary Low-Velocity Impact Damage Propagation in Composite Laminates

作　　者：冯冠华 朱书华[1] 刘翀 陈稳 朱强 肖鹏 FENG Guan-hua;ZHU Shu-hua;LIU Chong;CHEN Wen;ZHU Qiang;XIAO Peng(Nanjing University of Aeronautics and Astronautics,Nanjing 210000,China;China Special Vehicle Research Institute,Jingmen 448000,China)

机构地区：[1]南京航空航天大学,江苏南京210000 [2]中国特种飞行器研究所,湖北荆门448000

出　　处：《航空计算技术》2024年第6期38-42,共5页Aeronautical Computing Technique

基　　金：国家重大科技专项资助(Y2019-I-0018-0017);航空科学基金项目资助(20230009052004)。

摘　　要：为了获得复合材料层合板在二次冲击下的损伤积累与扩展,本文采用试验与有限元仿真分析相结合的方法,研究了二次冲击后的损伤情况和载荷-时间曲线。对比单次冲击试验与有限元分析得到的载荷-时间曲线误差仅为8.9%,并对比了C扫损伤图和有限元仿真损伤图吻合较好,验证了模型的正确性。通过有限元分析对二次低速冲击进行了研究,发现在第二次冲击下峰值载荷提升了16.7%。对比总能量相等的单次冲击,单次冲击下层合板吸收能量为18.5 J,冲头传递给层合板的能量更多,损伤更严重;此外研究了冲击次数与冲击能量之间的关系,发现单次冲击与二次冲击总能量比为√2时,造成的损伤几乎一致。To investigate the damage accumulation and propagation in composite laminates under secondary impact,this study combines experimental methods with finite element simulation analysis to examine the damage state and load-time curves following secondary impacts.A comparison between the experimental and finite element analysis-derived load-time curves for single impacts reveals an error margin of only 8.9%.Additionally,the correlation between C-scan damage images and finite element simulation damage images is found to be satisfactory,thereby validating the accuracy of the model.Through finite element analysis of secondary low-velocity impacts,it is observed that the peak load increases by 16.7%during the second impact.When compared to a single impact with equivalent total energy,the laminate absorbs 18.5 J of energy in a single impact,transferring more energy from the impactor to the laminate and resulting in more severe damage.Furthermore,the relationship between the number of impacts and the impact energy is investigated,revealing that when the total energy of a single impact is 2 times that of the secondary impact,the resulting damage is almost identical.

关 键 词：复合材料 二次冲击 渐进损伤分析 损伤扩展 

分 类 号：TB33[一般工业技术—材料科学与工程]