Strain rate effect on the out-of-plane dynamic compressive behavior of metallic honeycombs: Experiment and theory
Strain rate effect on the out-of-plane dynamic compressive behavior of metallic honeycombs: Experiment and theory
复制标题
应变率对金属蜂窝体面外动态压缩行为的影响：实验与理论
DOI：
10.1016/j.compstruct.2015.06.015
复制
发表时间：
2015-11
影响因子：
6.3
通讯作者：
Fang Daining
中科院分区：
文献类型：
--
作者：
Tao Yong;Chen Mingji;Chen Haosen;Pei Yongmao;Fang Daining
许多研究表明，金属蜂窝的动态抗压强度高于准静态抗压强度，但其原因仍有争议。本文旨在研究母材应变率对金属蜂窝材料面外动态压缩行为的影响。利用万能试验机和分离式Hopkinson压杆分别对铝蜂窝进行了准静态和动态试验。动态试验的速度值在6~19米/S之间。目前和现有的高原应力测量方法都采用率无关(R-I)和率相关(R-D)冲击理论进行评估。研究表明，在低、中、高冲击速度下，R-D激波理论能提供更准确的预测结果。基于R-D冲击理论，定量分析了应变率效应的影响，合理解释了测量平台应力随冲击速度的变化趋势。分析表明，在较宽的速度范围内，应变率效应对金属蜂窝的动态增强有很大的贡献。
Many studies reveal that the dynamic compressive strength of metallic honeycombs is higher than the quasi-static one, but the reasons for that are still debatable. This paper aims to study the strain rate effect of parent materials on the out-of-plane dynamic compressive behavior of metallic honeycombs. Quasi-static and dynamic tests on aluminum honeycombs were performed with universal testing machine and Split Hopkinson Pressure Bar, respectively. The velocity values of dynamic tests were from about 6 to 19 m/s. The present and existing measures of plateau stress are evaluated by both the rate-independent (R-I) and rate-dependent (R-D) shock theories. It is shown that the R-D shock theory proposed in our previous study provides more accurate predictions at low, medium and high impact velocities. Based on the R-D shock theory, the influences of strain rate effect are analyzed quantitatively and the change tendencies of measured plateau stresses with impact velocities are explained reasonably. The analysis indicates that the strain rate effect has a large contribution to the dynamic enhancement of metallic honeycombs in a wide velocity range.
登录
查看更多内容
影响因子：
6.3
作者：
Shanqing Xu;J. Beynon;D. Ruan;G. Lu
通讯作者：
Shanqing Xu;J. Beynon;D. Ruan;G. Lu
影响因子：
2.5
作者：
Jaeung Chung;A. Waas
通讯作者：
Jaeung Chung;A. Waas
影响因子：
7.3
作者：
Han Zhao;I. Elnasri;S. Abdennadher
通讯作者：
Han Zhao;I. Elnasri;S. Abdennadher
不同蜂窝结构铝蜂窝抗压强度的实验和数值研究
影响因子：
5.1
作者：
Zhang Xiong;Zhang Hui;Wen Zhuzhu
通讯作者：
Wen Zhuzhu
影响因子：
5.1
作者：
J. Harrigan;S. Reid;C. Peng
通讯作者：
J. Harrigan;S. Reid;C. Peng