多孔柱准静态压缩力学行为和吸能特性分析

Analysis of quasi-static compression mechanical behavior and energy absorption characteristics of porous columns

对蜂窝、内凹和正方形的多孔柱以及加固后的多孔柱在准静态单轴压缩作用下的力学行为和吸能特性进行了实验和仿真研究。通过实验结果和有限元仿真结果的对比,验证了结果的可靠性。基于实验和有限元仿真结果,分析了不同构型多孔性的最大承载力、弹性模量和吸能能力。结果表明,随着孔隙率的降低,蜂窝构型的最大承载力逐渐增大,3棱加固的蜂窝多孔柱承载力最大,无加固的蜂窝多孔柱弹性模量最大。而对于内凹构型,十字加固的多孔柱承载力最大,竖直加固的多孔柱弹性模量最大。对于相同质量的蜂窝、内凹和正方形多孔柱,蜂窝多孔柱的承载力最大。多孔柱的吸能能力和承载能力变化规律基本一致。

The mechanical behavior and energy absorption capacity of honeycomb, re-entrant and square porous columns and reinforced porous columns under quasi-static uniaxial compression were studied by experiments and simulations. Through the comparison of experimental results and finite element simulation results, the reliability of the results were verified. Based on the experimental and finite element simulation results, the maximum bearing capacity, elastic modulus and energy absorption capacity of porous column with different structures were analyzed. The results show that with the decrease of porosity, the maximum bearing capacity of the honeycomb structure gradually increases, the bearing capacity of honeycomb porous column with three-sided reinforcement is the largest, and the elastic modulus of honeycomb porous column without reinforcement is the largest. For re-entrant structure, the porous column with cross-reinforcement has the largest bearing capacity, and the porous column with vertical reinforcement has the largest elastic modulus. For honeycomb, re-entrant and square porous columns with same quality, bearing capacity of the honeycomb porous column is the largest. The variation law of energy absorption capacity of porous colvomns is basically consistent with that of carrying capacity.