航空材料学报2024，Vol.44Issue(6)：97-106,10.DOI:10.11868/j.issn.1005-5053.2023.000163
基于SLM的316L不锈钢椭圆截面体心四方点阵结构压缩性能
Compression properties of 316L stainless steel E-BCT lattice structure based on SLM process
摘要
Abstract
The elliptic section body-centered tetragonal(E-BCT)lattice structure of 316L stainless steel fabricated based on selective laser melting(SLM),represents an enhanced lattice structure with improved compressive performance.By optimizing the cross-sectional shape of the struts in the traditional body-centered tetragonal(BCT)lattice,the compressive properties of the lattice structure are significantly improved.Based on the mathematical model of the E-BCT lattice structure,the theoretical force model,and the Timoshenko beam theory,a relationship model is derived between structural parameters and relative density as well as effective elastic modulus.E-BCT lattice structures with varying semi-major axis lengths of the elliptical cross-section are fabricated using the SLM process,and static compression tests and finite element simulations are conducted.The study reveals that as the semi-major axis and shape factor of the elliptical cross-section increase,the performance of the E-BCT lattice structure improves significantly compared to the BCT lattice.The maximum improvement in effective elastic modulus is 637%,with average experimental and theoretical simulation errors of 6.5%and 5.1%respectively.The yield strength shows the maximum increase of 654%,with an average experimental and simulation error of 5.4%.Additionally,the specific stiffness and specific strength exhibit maximum improvements of 308%and 321%respectively.关键词
选区激光熔化/点阵结构/椭圆截面/实验与仿真/压缩性能Key words
selective laser melting/body-centered tetragonal/elliptic section/experiment and simulation/compression property引用本文复制引用
朱峰立,许明三,韦铁平,叶建华,潘文瀚,杨林沂..基于SLM的316L不锈钢椭圆截面体心四方点阵结构压缩性能[J].航空材料学报,2024,44(6):97-106,10.基金项目
国家自然科学基金(51575110) （51575110）
福建省自然科学基金(2020J01872) （2020J01872）
