Ti/Cf/PEEK混杂层板低速冲击及剩余拉伸性能实验研究  

Experimental study on the low velocity impact damage and residual tensile properties of Ti/Cf/PEEK hybrid laminates

作　　者：袁潇洒 Bhuwan Sapkota 郭华鑫 仲浪 潘蕾[1] YUAN Xiaosa;Bhuwan Sapkota;GUO Huaxin;ZHONG Lang;PAN Lei(College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210000,China)

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210000

出　　处：《振动与冲击》2020年第22期96-102,共7页Journal of Vibration and Shock

基　　金：国家重点研发计划(2017YFB0703300,2017YFB0703301);江苏省国际科技合作项目(BZ2017063)。

摘　　要：通过实验研究Ti/Cf/PEEK纤维金属层板低速冲击损伤机制及冲击后拉伸性能。混杂层板采用2/1和3/2两种铺层结构,铺层角度均为0°、45°、90°,分别在15 J和25 J冲击能量下进行冲击试验,对比分析两种铺层结构之间及同一铺层结构不同铺层角度之间的冲击损伤机制和剩余拉伸强度退化规律、剩余拉伸失效模式。结果表明:两种铺层结构的混杂层板冲击损伤机制主要有塑性变形、缩进、形成损伤区域、开裂、基质侵入金属损伤区域、纤维断裂、分层等,45°铺层角度的层板表现出较好的抗冲击损伤扩展性能。剩余拉伸强度退化规律与纤维铺放角度有关,0°铺放角度的层板冲击后剩余拉伸强度最高,其次是45°铺层方向,最差是90°铺层方向;2/1结构混杂层板剩余拉伸失效模式近似脆性断裂,而3/2结构层板既有延性断裂的特征,又有脆性断裂的特征。The low velocity impact damage mechanism and tensile properties after impact of Ti/Cf/PEEK fiber metal laminates were studied experimentally.The hybrid laminates were composed of 2/1 and 3/2 ply structures,and the ply angles of the both structures were 0°,45°,90°.The impact tests were carried out under the impact energy of 15 J and 25 J respectively.For the two types of ply structures and for the same structure with different ply angles,the impact damage mechanism,residual tensile strength degradation and residual tensile failure mode were compared and analyzed.The results show that the impact damage mechanism of the hybrid laminates with two kinds of ply structures mainly includes the processes of plastic deformation,indentation,formation of damaged areas,cracking,matrix erosion,fiber breakage,delamination,etc..45°layup direction laminates exhibit good impact damage resistance.The residual tensile strength degradation is related to the fiber placement angle.With 0°layup direction the remaining tensile strength of the laminates after impact is the highest,followed by the case of 45°layup direction,the worst is the case of 90°layup direction.The residual tensile failure mode of the 2/1 structural hybrid laminates is approximately brittle fracture,and that of the 3/2 structural laminates has both ductile fracture characteristics and brittle fracture characteristics.

关 键 词：纤维金属层板(FML) 低速冲击 损伤机制 剩余拉伸强度退化规律 剩余拉伸失效模式 

分 类 号：TB333[一般工业技术—材料科学与工程]