Experimental and simulated compressive properties of work-hardened X-type lattice truss structures

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• 作者：Qiancheng Zhang ; Tianjian Lu ; ^{tjlu@mail.xjtu.edu.cn}
• 关键词：sandwichs ; work hardening ; resistance welding ; X-type core
• 刊名：Acta Mechanica Solida Sinica
• 出版年：2012
• 期刊代码：P51_08949166
• 类别：et
• 出版时间：April, 2012
• 卷：25
• 期：2
• 页码：111-116
• 文件大小：617 K

摘要

The expanded metal sheets were folded with 11%work-hardening. These were subsequently used with resistance welding to construct X-type lattice truss sandwich panels having a core relative density of 0.17. The sandwich panels were tested in uniaxial compression and, for comparison, the method of finite elements was employed to simulate the measured compressive stress-strain curves. The peak compressive strength was 32%higher than that of pyramidal core sandwiches. The enhanced mechanical properties of the work-hardened X-Type lattice structures mainly originate from the contribution of straight struts with low degree of curvature and work hardening, rather than the two-dimensional staggered nodes.