On axial splitting and curling behaviour of circular sandwich metal tubes with metal foam core
On axial splitting and curling behaviour of circular sandwich metal tubes with metal foam core
复制标题
泡沫金属芯圆形夹层金属管的轴向劈裂和卷曲行为
DOI：
10.1016/j.ijsolstr.2020.06.021
复制
发表时间：
2020-10-01
影响因子：
3.6
通讯作者：
Wang, Tiejun
中科院分区：
文献类型：
--
作者：
Zhang, Jianxun;Ye, Yang;Wang, Tiejun
对泡沫金属夹芯圆管的轴向劈裂和卷曲行为进行了理论分析和实验研究。夹芯管轴向开裂，试件远端预制裂纹使夹芯带向外卷曲。对夹层圆管进行了轴向压缩实验，得到了夹层圆管的变形模式，建立了夹层圆管轴向开裂和卷曲的理论模型，该模型考虑了裂纹撕裂、塑性弯曲、卷曲、泡沫压缩和摩擦等因素的影响。结果表明，分析预测捕捉实验结果合理。在圆形夹层管轴向劈裂卷曲吸能装置中，管壁厚度、泡沫强度、泡沫厚度、预制裂纹数和模具半角度的影响至关重要。(C)2020爱思唯尔有限公司保留所有权利。
Axial splitting and curling behaviour of circular sandwich metal tubes with metal foam core is investigated analytically and experimentally. The sandwich tubes split axially and the strips curl outward by prefabricated cracks at the distal end of the specimens. Axial compression experiments of circular sandwich metal tubes are carried out and deformation modes are found. A theoretical model is developed to predict the axial splitting and curling behaviour of the circular sandwich metal tubes including effects of the tearing of the cracks, plastic bending, curling, foam compression and friction. It is shown that the analytical predictions capture the experimental results reasonably. Effects of the tube thickness, foam strength, foam thickness, the number of the prefabricated cracks, and the semi-angle of the die are of vital important in energy absorption devices by the axial splitting and curling of circular sandwich tubes. (C) 2020 Elsevier Ltd. All rights reserved.