梯度蜂窝夹芯板在爆炸荷载作用下的动力响应

发布时间：2018-01-15 00:29

本文关键词：梯度蜂窝夹芯板在爆炸荷载作用下的动力响应　出处：《爆炸与冲击》2016年03期 　论文类型：期刊论文

【摘要】：利用弹道冲击摆锤系统对分层梯度蜂窝夹芯板在爆炸荷载下的动力响应进行了实验研究,分析了梯度蜂窝夹芯板在爆炸荷载作用下的变形失效模式,并与传统非梯度蜂窝夹芯板的抗爆性能做了对比。通过一维应力波理论,分析了应力波在梯度芯层中的传播规律。应力波透射系数在梯度试件中比非梯度芯层中小,而且相对密度递减的芯层组合有最小的应力波透射系数。综合考虑结构变形失效模式,后面板挠度,芯层压缩量以及应力波传播特点得到:分层梯度蜂窝夹芯板的抗爆性能明显优于传统的非梯度夹芯板,在所研究的荷载范围内,芯层相对密度从大到小排列试件的抗爆性能相对较好。
[Abstract]:The dynamic response of layered gradient honeycomb sandwich panel under explosion load is studied experimentally by using ballistic impact pendulum system. The deformation failure mode of gradient honeycomb sandwich panel under explosive load is analyzed. And compared with the traditional non-gradient honeycomb sandwich panel anti-explosion performance, through one-dimensional stress wave theory. The transmission coefficient of stress wave in gradient core layer is smaller than that in non-gradient core layer. And the core layer combination with decreasing relative density has the minimum stress wave transmission coefficient. Considering the deformation failure mode of the structure, the deflection of the rear panel is considered. The characteristics of core lamination shrinkage and stress wave propagation show that the anti-explosion performance of layered gradient honeycomb sandwich panel is obviously superior to that of traditional non-gradient sandwich panel, which is within the studied range of load. The relative density of core layer is relatively good from large to small.
【作者单位】：太原理工大学应用力学与生物医学工程研究所;
【基金】：国家自然科学基金项目(11172196) 山西省自然科学基金项目(2014011009-1)
【分类号】：O381
【正文快照】： 随着汽车工业及航空航天技术的不断发展,夹芯复合结构由于比强度和比刚度高而被广泛的应用于防撞吸能构件的设计中。研究人员做了许多有关夹芯结构准静态[1]、动态[2]力学行为的工作,涉及的芯层结构包括蜂窝[3]、金属泡沫[4]、波纹板[5]及点阵结构[6]等多种形式,但大多数研究

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