China Foundry
Title: Compression behavior of 316L lattice structures produced by indirect additive manufacturing
Author: Yan-peng Wei1,2, Hao Yang3, Jing-chang Cheng1, Peng Gao1, Jian Shi1, **Feng Lin2, and *Bo Yu1
Address: 1. State Key Laboratory of Light Alloy Casting Technology for High-end Equipment, Shenyang Research Institute of Foundry Co., Ltd., Shenyang 110022, China; 2. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; 3. Key Laboratory of Space Physics, Beijing 100076, China
Key words: 316L lattice structures; indirect additive manufacturing; compression behavior; investment casting; finite element simulation
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Document Code: A
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Abstract:
As a new type of lightweight structure, metallic lattice structure has higher stiffness, and strength to weight ratio. To freely obtain 316L lattice structures with designed cell structure and adjustable porosity, additive manufacturing combined with investment casting was conducted to fabricate the 316L lattice structures with Kelvin cell. The compression simulation of 316L lattice structures with different porosities was carried out by using the finite element method. The numerical simulation results were verified by compression experiment, and the simulated results were consistent with the compression tests. The results showed that the compressive mechanical properties of 316L lattice structures are directly related to porosity and independent of strut diameters size. The 316L lattice structures with Kelvin cell have a smooth stress-strain curve and obvious plastic platform, and the hump stress-strain curves are avoided.