PVC泡沫夹芯板低速冲击响应数值模拟

发布时间：2018-02-24 04:14

本文关键词： 低速冲击泡沫夹芯板通用接触面面接触　出处：《玻璃钢/复合材料》2016年02期 　论文类型：期刊论文

【摘要】：针对复合材料夹芯结构受到外来物体的撞击后易产生冲击损伤的特点,结合Hashin失效准则和泡沫压碎模型,在Abaqus/Explicit中建立了闭孔聚氯乙烯泡沫夹芯结构有限元模型。在验证模型正确的基础上,分析了通用接触和面面接触对载荷历程及界面分层面积的影响,并分析了面面接触下,冲击区域处(30mm×30mm)三种网格尺寸(0.5mm,1.0mm及1.5mm)对夹芯结构低速冲击响应的影响。研究结果表明,面面接触更适合模拟夹芯板的低速冲击响应。当冲击能量为4J,网格尺寸为0.5mm时,接触力载荷历程与试验得到的载荷曲线更接近,但是曲线上不能观察到载荷突降点,而1.0mm和1.5mm时载荷历程曲线上都能观察到载荷突降点,并且都出现在0.0005s附近。
[Abstract]:According to the characteristics that the composite sandwich structure is easily damaged by the impact of foreign objects, combined with the failure criterion of Hashin and the foam crushing model, The finite element model of closed cell PVC foam sandwich structure is established in Abaqus/Explicit. Based on the correctness of the model, the influence of general contact and surface contact on the load history and interface stratification area is analyzed, and the surface contact is analyzed. The effects of three kinds of mesh sizes (0.5mm 1.0mm and 1.5mm) on the low-velocity impact response of sandwich structure are studied. The results show that the surface-to-surface contact is more suitable for simulating the low-velocity impact response of sandwich panels. When the impact energy is 4J, the mesh size is 0.5mm. The load history of the contact force is closer to the load curve obtained by the test, but the sudden drop point of the load can not be observed on the curve. However, the load sudden drop point can be observed on the load history curve of 1.0mm and 1.5mm, and both of them appear in the vicinity of 0.0005s.
【作者单位】：中北大学山西省高分子复合材料工程技术研究中心;中北大学材料与工程学院;
【基金】：青年科学基金项目(51503187)
【分类号】：TB332

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