恒定高应变率拉伸条件下泡沫金属力学性能

张晓阳 谭仕锋 刘泽宇 赵飘

张晓阳, 谭仕锋, 刘泽宇, 赵飘. 恒定高应变率拉伸条件下泡沫金属力学性能[J]. 爆炸与冲击, 2024, 44(1): 013105. doi: 10.11883/bzycj-2023-0128
引用本文: 张晓阳, 谭仕锋, 刘泽宇, 赵飘. 恒定高应变率拉伸条件下泡沫金属力学性能[J]. 爆炸与冲击, 2024, 44(1): 013105. doi: 10.11883/bzycj-2023-0128
ZHANG Xiaoyang, TAN Shifeng, LIU Zeyu, ZHAO Piao. Mechanical property of metallic foams under dynamic tension with constant high strain rate[J]. Explosion And Shock Waves, 2024, 44(1): 013105. doi: 10.11883/bzycj-2023-0128
Citation: ZHANG Xiaoyang, TAN Shifeng, LIU Zeyu, ZHAO Piao. Mechanical property of metallic foams under dynamic tension with constant high strain rate[J]. Explosion And Shock Waves, 2024, 44(1): 013105. doi: 10.11883/bzycj-2023-0128

恒定高应变率拉伸条件下泡沫金属力学性能

doi: 10.11883/bzycj-2023-0128
基金项目: 国家自然科学基金项目(11902140);湖南省自然科学基金项目(2018JJ3425);
详细信息
    作者简介:

    张晓阳(1988- ),男,博士,讲师,xyzhang@usc.edu.cn

  • 中图分类号: O347.1

Mechanical property of metallic foams under dynamic tension with constant high strain rate

  • 摘要: 为了探究泡沫金属恒定应变率动态拉伸力学行为,基于3D Voronoi模型,采用双向拉伸加载方式和1.55倍等效胞孔直径高度的试件,实现了5000 s−1恒定高应变率动态拉伸条件下泡沫金属力学性能测试数值模拟实验,模拟结果显示:动态拉伸过程满足应力均匀性和变形均匀性要求,且试件破坏位置合理;在恒定应变率(0.5~5000 s−1)动态拉伸时,泡沫金属的破坏应变基本不受应变率的影响;当应变率不超过500 s−1 时,破坏应力受应变率影响很小,当应变率在 500~5000 s−1 时,破坏应力随着加载速率的增大而线性增大。
  • 图  1  3D Voronoi模型及网格划分

    Figure  1.  3D Voronoi model and grid division

    图  2  模型A、B拉伸加载示意

    Figure  2.  Schematic under tensile loading of model A and B

    图  3  动态拉伸加载应变率-时间曲线

    Figure  3.  Stain rate-time curve of dynamic tensile simulations

    图  4  模型A和B拉伸向均分示意图

    Figure  4.  Schematic of drawing direction equalization of model A and B

    图  5  各组模型伪应变能与内能比值($ \eta ={E}_{\mathrm{a}\mathrm{s}}/U $

    Figure  5.  Ratio of the artificial strain energy to internal energy ($ \eta ={E}_{\mathrm{a}\mathrm{s}}/U $) for dynamic tension simulations

    图  6  300 s−1拉伸时模型z=0截面变形过程

    Figure  6.  Deformations of foams at z=0 section under dynamic tension loading with strain rate of 300 s−1

    图  7  模型动态拉伸破坏示意图

    Figure  7.  Dynamic tensile failure diagram of each model

    图  8  拉伸模型应力-应变曲线及其应力不均匀性指标

    Figure  8.  Stress-strain curves and stress inhomogeneity of models

    图  9  各组模型应变不均匀性指标

    Figure  9.  Strain inhomogeneity of foam models

    图  10  模型B重复性验证

    Figure  10.  Repeatability verification of model B

    图  11  模型B高应变率拉伸破坏

    Figure  11.  Failure of the model B under high strain rate tensile loading

    图  12  模型B动态拉伸应力-应变曲线及不均匀性指标(5000 s−1

    Figure  12.  Dynamic tensile stress-strain curves and non-uniformity of the model B (5000 s−1)

    图  13  模型B不同应变率动态拉伸应力−应变曲线

    Figure  13.  Stress-strain curves of model B under dynamic tension loading with different strain rates

    图  14  应变率对泡沫铝动态拉伸破坏应力和应变的影响

    Figure  14.  Effects of strain rate on failure stress and strain of aluminum foam under dynamic tension loading

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出版历程
  • 收稿日期:  2023-04-10
  • 修回日期:  2023-10-25
  • 网络出版日期:  2023-11-07
  • 刊出日期:  2024-01-11

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