铝合金轴心受压构件的稳定性研究与数值模拟

为了给试验提供可靠的依据与指导,采用有限元软件ABAQUS对17根6082-T6型高强铝合金轴心受压构件进行数值模拟,并与试验结果进行对比分析.对影响有限元计算结果的各项因素,包括网格划分与尺寸、端板厚度、初弯曲大小和材料参数进行分析.有限元模型采用完全积分形式的20节点实体单元,铝合金应力应变关系采用Ramberg-...

Stability research and numerical simulation of high-strength aluminum alloy column in compression

To provide reliable verification and guidance for experiments,numerical simulations of 17 high-strength aluminum alloy columns in compression were conducted using ABAQUS and the results were compared with experimental results.Factors which influenced simulation results,including meshes size,thickness of end plates,initial imperfection and material properties were analyzed.3D full integration continuum element C3D20 and Ramberg-Osgood model for stress-strain relationship were adopted in simulation.The simulation results show that the relative errors of buckling load between experiments and simulations are under 12%;the meshes size and thickness of end plates have a negligible influence on stability coefficient,and the existence of end plates rarely influence mechanical properties of specimens with hinge supports;as initial geometric imperfection ascends and the parameter n of aluminum alloy descends,the value of stability coefficient decreases;buckling loads of specimens obviously increases as proof stress f0.2increases,especially for specimens with small slenderness ratio.