The plastic deformation behavior of additively manufactured anisotropic structures are analyzed using the finite element method (FEM). Hill’s quadratic anisotropic yield function is used, and a modified return-mapping method based on dual potential is presented. The plane stress biaxial loading condition is considered to investigate the number of iterations required for the convergence of the Newton-Raphson method during plastic deformation analysis. In this study, incompressible plastic deformation is considered, and the associated flow rule is assumed. The modified returnmapping method is implemented using the ABAQUS UMAT subroutine and effective in reducing the number of iterations in the Newton-Raphson method. The anisotropic tensile behavior is computed using the 3-dimensional FEM for two tensile specimens manufactured along orthogonal additive directions.

Abstract
1. 서 론
2. 회귀착점 방법과 뉴튼-랩슨 반복계산법(NRM)
3. Hill의 이방성 2차 항복함수와 소성변형률속도 포텐셜
4. 수치계산을 통한 수렴속도 검증
5. 이방성 적층 제조된 인장시편의 모델링
6. 결 론
감사의 글
References

• 양승용(한국기술교육대학교 기계공학부) | Seung-Yong Yang (Korea University of Technology and Education)
• 진두한(주식회사 타드) | Doo-Han Jin (Corporation TAAD) Corresponding author
• 김정한(한밭대학교 신소재공학과) | Jeoung-Han Kim (Hanbat National University) Corresponding author