摘要
基于3D打印与拓扑优化技术设计了65%、75%、85%体积分数钛合金轻质结构,并通过SLM制备85%试样,建立准静态压缩模型,分析其压缩性能与失效机制。研究结果显示,85%试样模拟与实验误差小于8%,验证了模型的可靠性。抗压强度随体积分数下降呈非线性,其中85%结构因高致密度,稳定性佳,强度达到1.15 GPa。变形分析表明,应力集中引发分阶段塑性变形为孔壁均匀屈服、局部剪切带形成及斜向断裂。
This study integrates 3D printing and topology optimization to design titanium alloy lightweight structures with volume fractions of 65%,75%,and 85%,and fabricates the 85%specimen via selective laser melting(SLM).A quasi-static compression model was established to analyze compressive performance and failure mechanisms.Results show that the simulation error for the 85%specimen is below 8%,validating the model′s reliability.Compressive strength decreases nonlinearly with reduced volume fraction,with the 85%structure achieving optimal stability(1.15 GPa strength)due to high densification.Deformation analysis reveals that stress concentration triggers multi-stage plastic deformation:initial uniform yielding of pore walls,localized shear band formation,and eventual oblique fracture.
作者
明乐
蔡高参
MING Le;CAI Gaoshen(School of Mechanical Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《电工技术》
2025年第22期232-234,239,共4页
Electric Engineering
关键词
轻质结构
拓扑优化
压缩性能
钛合金
lightweight structures
topology optimization
compressive performance
titanium alloy
