한국분말야금학회지 Vol. 27 No. 4 (p.318-324)

외연적 유한요소법을 이용한 적층제조 공정 중 응력 장 변화 계산

Computation of Stress Field During Additive Manufacturing by Explicit Finite Element Method
키워드 :
Additive manufacturing,Explicit finite element analysis,Stress field,Heat conduction

목차

Abstract
1. 서 론
2. 열팽창을 고려한 유한요소 방정식
3. 구성방정식
4. 열응력 수치해석 결과
5. 결 론
References

초록

In the present work, an explicit finite element analysis technique is introduced to analyze the thermal stress fields present in the additive manufacturing process. To this purpose, a finite element matrix formulation is derived from the equations of motion and continuity. The developed code, NET3D, is then applied to various sample problems including thermal stress development. The application of heat to an inclusion from an external source establishes an initial temperature from which heat flows to the surrounding body in the sample problems. The development of thermal stress due to the mismatch between the thermal strains is analyzed. As mass scaling can be used to shorten the computation time of explicit analysis, a mass scaling of 108 is employed here, which yields almost identical results to the quasi-static results.