压缩预应力下缝合复合材料层板低速冲击响应数值模拟  

Numerical Simulation of Low Velocity Impact Response of StitchedComposite Laminates under Compressive Preload

作　　者：刘学涛 毛春见[1] 吴玉根 钟茂平 LIU Xuetao;MAO Chunjian;WU Yugen;ZHONG Maoping(State Key Laboratory of Mechanics and Control for Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;The 725th Research Institute of China Shipbuilding Industry Corporation,Luoyang 471000,China;Jiangxi Hongdu Aviation Industry Co.,Ltd.,Nanchang 330024,China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,江苏南京210016 [2]中国船舶重工集团公司第七二五研究所,河南洛阳471000 [3]江西洪都航空工业集团有限责任公司,江西南昌330024

出　　处：《材料科学与工程学报》2023年第3期418-424,共7页Journal of Materials Science and Engineering

基　　金：江苏省自然科学基金资助项目(BK20160786);江苏省优势学科建设工程资助项目(PAPD)。

摘　　要：通过建立无预应力下低速冲击数值模型,将仿真结果同试验结果相比较,验证了模型的正确性;并在此基础上施加2400με压缩预应变来分析缝合层板的冲击响应。结果表明:缝合复合材料层板在承受压缩预应力时,层板的弯曲变形增大,冲击力最大值减小,冲头的回弹速度降低,分层损伤投影面积增加,能量损耗增加。压缩预应力对缝合层板低速冲击有较大的影响。By establishing the numerical model of low velocity impact without preload,the simulation results are compared with the test results to verify the correctness of the model.On this basis,2400μεcompressive pre-strain is applied to analyze the impact response of stitched laminates.The results show that when the stitched composite laminates is subjected to compressive preload,the bending deformation of the laminate increases,the maximum impact force decreases,and the rebound speed of the punch decreases.Compressive preload has a great influence on the low velocity impact of stitched laminates,which should be considered in practical engineering problems.

关 键 词：缝合复合材料层板 压缩预应力 低速冲击 显式有限元 冲击响应 

分 类 号：TB332[一般工业技术—材料科学与工程]