期刊
MECHANICS OF MATERIALS
卷 129, 期 -, 页码 290-305出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mechmat.2018.12.006
关键词
Tubular truss lattice; Interlocking method; Stainless steel; Stress-strain model; Mechanical properties
资金
- National Natural Science Foundation of China [11432004, 11421091]
A novel node interlocking assembly method is proposed for manufacturing a new type of pyramidal welded tube lattice sandwich structures with enhanced mechanical properties, consisting of millimeter-scale tubular truss cores and single layer solid face sheets. Sandwich panel specimens with relative densities ranging from 1.99-5.47% are fabricated from a stainless steel alloy. Mechanical responses and energy absorption are tested under through-thickness compressive and transverse shear loading. A three-stage nominal compressive stress strain model for as-brazed stainless steel welded tubes with different wall thicknesses is proposed to accurately predict the inelastic buckling strength of the lattice cores as well as the nonlinear material behaviors up to a nominal strain level on the order of 0.23. In general, the tested compressive and shear stiffnesses and strengths are in good agreement with analytical predictions. By comparison with numerous competing periodic cellular topologies, the node-interlocking pyramidal welded tube lattices exhibit significantly better overall mechanical properties, especially for specific strengths and specific energy absorptions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据