PVC夹芯板在冲击载荷下的动态响应与失效模式

发布时间：2018-08-20 13:33

【摘要】：通过开展对泡沫金属子弹撞击加载聚氯乙烯(polyvinyl chloride,PVC)夹芯板的实验,结合三维数字图像相关性(three dimensional digital image correlation,DIC-3D)技术,研究固支夹芯板在撞击加载条件下的动态响应,获得夹芯板受撞击及响应的变形过程,并结合图像分别分析夹芯板整体及三层结构的变形和失效模式;研究子弹冲量与背板最终变形之间的关系和相似冲量下等面密度不同芯层密度的夹芯结构的抗撞击性能。结果表明:夹芯板的破坏和失效主要集中在泡沫金属子弹直接作用区域,背板挠度由中间向固定端逐渐减小,子弹冲量与背板变形近似成线性关系。在等质量的条件下,降低芯层密度、增加芯层厚度可以有效降低背板的变形,实验结果对聚合物夹芯结构的工程优化设计具有一定的参考意义。
[Abstract]:The dynamic response of clamped sandwich panel subjected to impact loading was studied by means of the experiments of metal foam bullets impacting on the sandwich panel loaded with polyvinyl chloride and the (three dimensional digital image correlation (DIC-3D) technique of 3D digital image correlation, and the dynamic response of the clamped sandwich panel under impact loading was studied. The deformation process of sandwich panel subjected to impact and response was obtained, and the deformation and failure modes of the sandwich panel and its three-layer structure were analyzed by combining the images. The relationship between the bullet impulse and the final deformation of the backplane and the impact resistance of the sandwich structure with equal surface density and different core layer density under the similar impulse were studied. The results show that the failure and failure of sandwich panel are mainly concentrated in the direct action area of foam metal bullets, the deflection of the back plate decreases gradually from the middle to the fixed end, and the bullet impulse is approximately linear with the deformation of the back plate. Under the condition of equal quality, reducing the density of core layer and increasing the thickness of core layer can effectively reduce the deformation of back plate. The experimental results have some reference significance for the engineering optimization design of polymer sandwich structure.
【作者单位】：哈尔滨工业大学高速撞击研究中心;
【基金】：国家自然科学基金项目(11372088)
【分类号】：O347.3

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