基于拓扑优化的泡沫填充点阵结构力学行为研究

Research on Mechanical Behavior of Foam Filled Lattice Structure Based on Topology Optimization

采用拓扑优化方法设计刚度导向点阵结构,结合三维打印技术和泡沫填充技术,获得泡沫填充点阵结构,并结合材料试验机研究泡沫填充点阵结构在准静态压缩条件下的力学行为研究结果表明,泡沫填充点阵结构相比未填充的点阵结构,初始压溃应力增大24%,能量吸收能力提高25%,增大和提高的幅值远大于点阵结构与单纯泡沫试件性能的叠加,通过研究确认,泡沫填充有改善点阵结构力学性能的作用。

The topology optimization method was used to design the rigidity-oriented lattice structure,in combination with 3 D printing technology and foam filling technology,the foam filled lattice structure was obtained,and in combination with the material testing machine,the mechanical behavior of the foam filled lattice structure under quasi-static compression conditions was investigated. The findings show that compared with the unfilled lattice structure,the foam filled lattice structure has an initial crush stress increase of 24%and an energy absorption capacity increase of 25%. The increase and improvement amplitude is much larger than the superposition of performance of the lattice structure and the pure foam specimen. It is confirmed through research that the foam filling can improve the mechanical properties of the lattice structure.