변형하는 동일물체간의 접촉처리를 고려한 대형강괴 자유단조의 2차원 열점소성 유한요소해석

Two-Dimensional Thermo-Viscopiastic Finite Element Analysis of Free Forginf for Large Ingot Considerinf Internal Contact Treament on One Deforming Body

Internal contact scheme between two free surfaces on one deforming body has been proposed by using the penalty method. It has been imposed to be internal boundary condition on two-dimensional thermo-viscoplastic finite element method so as to analyze one deforming body, which has two free surfaces penetrating each others. Analysis of side pressing with a circular void and a inclined elliptic hole have been carried out in order to verity the proposed contact scheme. A finite element code imposed internal boundary condition has been applied to two-dimensional analysis of free forging of large ingot with a void. Through the analysis, effects of working parameters in order to consolidate voids have been investigated.