【摘要】 采用空气炮、渗透剂增强 X射线照相法对受到中心横向冲击的一系列平纹编织 S glass epoxy层板以及由此产生的损伤情况进行了研究 ,并采用有限元程序对层板的应力状态进行了分析。基于以上研究 ,发现 :相同动能下 ,小质量、高速度的弹体在板中产生的损伤面积大于大质量、低速度弹体 ;层板铺层角的变化对冲击载荷 时间曲线无显著影响 ;随冲击速度的提高 ,铺层角变化对层板损伤的影响变得显著 ,铺层角的错配可以偏转冲击裂纹的扩展方向。更多还原

【Abstract】 Systematic experimental studies on the sequential damage of centrally transversely impacted plan woven fabric S glass/epoxy laminates have been conducted by using gas gun and penetrant enhanced X ray radiography. The finite element code is developed to understand the stresses distributions in the plates. Based on the study, it can be concluded that the small mass, high velocity impactor can produce more serious damage than large mass, low velocity impactor in the same kinetic energy. The ply orientation has no influence on the force time histories of laminates; with the velocity increasing, the influence of the ply orientation on the damage mode and extent become obvious. Mismatch of ply orientation can deflect the propagation of impact induced cracks.更多还原