【摘要】 采用泡沫金属子弹撞击加载的方式研究了T700碳纤维复合材料面层-泡沫铝芯体的夹芯结构动力响应。利用激光测速装置、高速摄像仪和位移传感器记录了泡沫子弹的撞击速度、子弹撞击夹芯板全过程和夹芯板后面板中心点的位移时程曲线。研究了加载冲量和芯层相对密度对夹芯板冲击响应的影响,得到了碳纤维复合材料-泡沫铝夹芯板的变形与失效模式。同时,采用ABAQUS有限元软件进行数值模拟,研究了复合材料面板铺层方式、面层厚度、芯层厚度和相对密度以及泡沫铝子弹的长度、速度和相对密度等参数对夹芯板冲击响应的影响。更多还原

【Abstract】 Here,dynamic responses of a square sandwich panel composed of T700 carbon fiber laminated face sheets and aluminum foam core were studied with tests. The square sandwich panel with four edges clamped was impacted by an aluminum foam projectile. A high speed-video camera and a laser displacement transducer were used to record the velocity of the foam projectile,the process of the foam projectile impacting the panel ’s front face sheet and the displacement time history curve of the central point on its back face sheet. The effects of loading time momentum and core layer relative density on the panel’s impact responses were studied to get deformations and failure modes of the panel. At the same time,dynamic responses of the carbon fiber composite sandwich panel with aluminum foam core under impact loading were simulated and analyzed with the finite element software ABAQUS. The results showed that composite facesheets’ thickness and layering mode,foam core’s thickness and relative density,and foam projectile’s length,velocity and relative density etc. have obvious influences on impact responses of the sandwich panel.更多还原