04.1 - Aerospace Grade Materials, Structural Analysis, Fatigue and Damage Tolerance
EFFICIENT THERMOMECHANICAL SIMULATION FOR METALLIC LATTICE STRUCTURES FABRICATED BY ADDITIVE MANUFACTURING
N. Tsushima, Japan Aerospace Exploration Agency, Japan; M. Kita¹, I. Matsubara¹, M. Ohishi, Ryoyu Systems Co., Ltd., Japan; R. Higuchi, 2The University of Tokyo, Japan; K. Yamamoto¹; ¹3Cybernet Systems Co., Ltd., Japan
In this study, the efficiency and accuracy of different heat source models and numerical configurations in thermomechanical simulations are investigated. We focus on the powder bed fusion (PBF) process, which is one of the popular processes offering compatibility with metal alloys for practical stiffness and strength properties. Structural characteristics of lattice structures with geometrical predictions of fabricated lattice structures with various thermomechanical simulations are also investigated to evaluate the feasibilities of each simulation model in terms of computational efficiency and accuracy. The study provides a better understanding of the fabrication process and resulting geometrical deviation of lattice structures by the AM.