摘要
针对复合材料低能冲击损伤机理研究不足的现状,应用复合材料层合板三维逐渐累积冲击损伤预测方法,对3种不同铺层顺序的T300/BMP-316层合板的低能冲击过程进行了详细分析,研究了其损伤在各层中的分布规律,并结合层合板的应力等值线图,分析了基体开裂及分层的损伤机理,研究认为基体开裂产生主要由垂直于纤维方向的拉应力达到一定值后,基体和纤维的形变不协调引起的;冲击背面附近和冲击正面附近的分层,分别是由基体开裂和相邻层的弯曲刚度不协调引起的。
In accordance with the lack of research about impacted damage mechanism, the low-energy impact damage process of T300/BMP-316 laminates with three different ply stacking sequences was analyzed using a 3-D progressive impact damage analysis method. The influences of ply parameters on the impact damage of the laminates were first investigated and the impact damage mechanism was discussed by combining with the figure of impact stress in the laminates. It is found that matrix cracking is caused by the inconsistent distortion of matrix and fiber when the tensile stress perpendicular to the fiber direction reaches a certain value, and delamination near to the impacted back face and front face are caused individually by matrix cracking and the inconsistent bend stiffness between two laminas.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2013年第2期169-174,共6页
Journal of Materials Science and Engineering
关键词
层合板
冲击
损伤机理
逐渐损伤
数值模拟
laminate
impact
damage mechanism
progressive damage
numerical simulation
