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금속 적층제조를 통해 제작된 내부 구조물의 압축변형 및 파단에 관한 연구
진칭예(QINGYE JIN),정호승(Ho-seung Jeong),손용(Yong Son),연시모(Si-Mo Yeon),박상후(Sang-hu Park) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11
Developing of AM (Additive Manufacturing) process, lattice structures are fabricated with stable mechanical properties recently. Lattice structures have its potential performances after yield and during destruction. In this study, fracture characteristics of the lattice structures (BCC & FCC) fabricated by SLM process with optimized manufacturing condition were analyzed by FE-Analysis and Experiments. As a result, several fracture modes and preferential fracture area were found by FE-Analysis, comparing with result of compression experiment result. In addition, the lattice structures have great sacrificial prices rather than structural prices, because of its fracture characteristics that whose strength rises during destruction till final fracture. Lattice structures seem to have nice application value with disposable lightweight parts for impact, such as impact armor for defense or aerospace. Impact characteristics, which has high sacrificial price, of usual lattice structures will be studied as a future research.