반응용재료의 압축거동 및 액상의 유동을 고려한 유한요소해석

A Compression Behavior of Semi-Solid Material and Finite Element Analysis Considering Flow of Liquid Phase

Compression behavior of semi-solid aluminum alloys with controlled solid fractions was investigated in the present study. The stress and strain relationships were obtained from the compression test. Variations of the solid fraction distribution and the material behaviour were investigated for various friction coeffieiants and die speedsd. For a finite element analysis, the semi-solid material was described by a compressible regid viscoplastic model for the solid region and darcy's law for the liquid region. The computed results were compared with experimental data for the validity of the yield criteria.