The dynamic response and failures of carbon/epoxy composite laminates subjected to underwater impulsive loading are investigated experimentally. The effect of impulsive intensity and thickness of laminates on dynamic deformation, failure modes, and associated mechanisms is identified and quantified respectively. The plates are subjected to underwater impulsive loads of different intensities with a lab-scaled underwater explosive simulator. 3D DIC is employed to capture the dynamic response in terms of response rate, mid-span deflection, and deflection-profile history during the elastic response process, followed by a series of postmortem non-destructive investigation and microscopic examinations to examine the failure modes and its distributions, and analyse the associated mechanisms. The results show that the intensity of impulse, thickness and failure of panels affect the dynamic response of laminate plates significantly. The non-surface failure has very limited influences on the tendency of the deflection-impulse relationship, and the local failure on the surface occurring later than the delamination and fiber fracture through the thickness of laminates. The blast resistance of composite laminates is not enhanced continuously with the increasing thickness due to the inconsistent changes of failure modes. With similar areal mass, meanwhile, composite laminates perform better blast-resistant performance than that of the metallic structures.

实验研究了碳/环氧复合材料层压板在水下冲击载荷作用下的动力响应和破坏。分别确定并量化了层压板的脉冲强度和厚度对动态变形，破坏模式和相关机理的影响。使用实验室规模的水下爆炸模拟器，这些板承受不同强度的水下冲击载荷。在弹性响应过程中，使用3D DIC捕获响应速率，中跨挠度和挠曲轮廓历史方面的动态响应，然后进行一系列事后无损调查和显微镜检查，以检查破坏模式和它的分布，并分析相关的机制。结果表明，冲动的强度，面板的厚度和破坏会严重影响层压板的动力响应。非表面破坏对挠曲-脉冲关系趋势的影响非常有限，并且表面上的局部破坏发生在层压板厚度范围内的分层和纤维断裂之后。由于破坏模式的不一致变化，复合材料层压板的抗爆炸性没有随着厚度的增加而连续提高。同时，在具有相似的面质量的情况下，复合层压板的抗爆炸性能要比金属结构更好。并且表面的局部故障发生在分层和纤维断裂之后，直到层压板的厚度。由于破坏模式的不一致变化，复合材料层压板的抗爆炸性没有随着厚度的增加而连续提高。同时，在具有相似的面质量的情况下，复合层压板的抗爆炸性能要比金属结构更好。并且在层压板厚度范围内，表面的局部失效要晚于分层和纤维断裂。由于破坏模式的不一致变化，复合材料层压板的抗爆炸性没有随着厚度的增加而连续提高。同时，在具有相似的面质量的情况下，复合层压板的抗爆炸性能要比金属结构更好。