复合材料外物损伤规律及损伤后拉伸疲劳研究  

Study on Foreign Object Damage Rule and Tensile Fatigue of Composite Materials

作　　者：刘丰瑞 陈伟[1] 陆楷楠 赵振华[2] 刘璐璐[1] 罗刚[2] LIU Fengrui;CHEN Wei;LU Kainan;ZHAO Zhenhua;LIU Lulu;LUO Gang(Aero-engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航空发动机热环境与热结构工业和信息化部重点实验室,江苏南京210016 [2]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

出　　处：《机械制造与自动化》2023年第1期42-47,共6页Machine Building & Automation

摘　　要：为研究复合材料受外力冲击的规律和冲击后疲劳的特性,分别使用200 m/s、300 m/s的冲击速度、直径4 mm、3 mm的钢珠以90°和30°入射角度冲击复合材料层合板,模拟外物损伤的过程,共设计了24组冲击试验和9组疲劳试验。根据结果比对冲击速度、冲击物大小、冲击角度对冲击损伤的影响,分别对复合材料层合板损伤的长度、宽度和深度进行研究。对冲击后的层合板进行拉伸疲劳试验,根据所得到的疲劳极限,建立冲击损伤长度、宽度、深度和疲劳强度的关系。结果表明:相对于冲击角度,冲击物大小变化对层合板损伤影响更大,冲击速度的影响最小;疲劳强度与损伤长度和宽度的相关性较为明显,而与损伤深度的相关性较小。To study the impact law and impacted fatigue characteristics of composite materials,4 mm and 3 mm diameter steel balls were used to impact the composite laminates at the speeds of 200 m/s and 300 m/s and at the angels of 30 and 90 to simulate the process of foreign object damage,24 groups of impact tests and 9 groups of fatigue tests were designed and conducted.According to the test results,the effects on the impact damage by impact velocity,foreign object size and impact angle were compared,and the damage length,width and depth of composite laminates were studied respectively.The tensile fatigue tests of the damaged laminates were carried out.According to the obtained fatigue limit,the relationship between the length,width,depth of impact damage and fatigue strength was established.The results show the impact material size change has a greater effect on the damage of composite laminates than the impact angle with the the least effect on impact velocity,while the fatigue strength has obvious correlation with the length and width of damage,but poor correlation with the depth of damage.

关 键 词：复合材料 外物损伤 冲击速度 冲击角度 外物尺寸 拉伸疲劳 

分 类 号：TB302.3[一般工业技术—材料科学与工程]