碳纤维增强复合材料层合板的抗冲击性能

为了研究碳纤维增强环氧树脂基复合材料层合梁的抗冲击性能,应用金属泡沫弹撞击加载的方式,结合高速摄像机,对等厚度层合梁结构的动态响应和失效行为展开实验研究。研究不同冲击加载强度对层合梁的动态失效过程、变形轮廓、中点变形、失效模式及能量耗散比的影响。结果表明:随着冲击强度的增加,中点变形响应速度随之增加,层合梁变形模式由整体变形转变为局部变形,且局部化效应随之增加,并伴随严重的基体和纤维断裂失效。层合梁能量耗散比随冲击强度的增加而增加,并展现出与结构失效模式直接关联的弹性变形、中心断裂和完全失效3个不同阶段。

Impulsive Resistance of the CFRP/Epoxy Laminate

To investigate the impulsive resistance property of the carbon fiber reinforced polymer and epoxy(CFRP/Epoxy)laminate,the dynamic response and failure behaviors of the CFRP/Epoxy laminate beam subjected to varying impulsive intensities were experimental studied.The impulsive loading was generated by the impact of aluminum foam projectile which was fired by a one-stage light gas gun system.To capture the dynamic process of the impacts,a high-speed camera was employed.The impulsive resistance property in terms of dynamic failures,deformation profiles,midpoint deflections,failure modes and specific energy absorption was analyzed by considering the intensity effects of the impulsive loading.The results indicate that the rate of midpoint deflection response increases with the increasing impulses.The deformation regime of the composite beam changes from structural deformation to local deformation with the increasing impulses,accompanying with server matrix and fiber damages.With the impulse increasing,the specific energy absorption(SEA)undergoes three stages which are directly related to the failure modes of the laminates.