Numerical analysis on thermal compression of #br#
sample used in a thermal simulation testing machine
XIE Zhengjun 1,FAN Tian 2,XIE Jianbo 2
1. School of Materials Science and Engineering, Southwest University of Science and
Technology, Mianyang 621000, China;2. School of Materials Science and Engineering,
Shanghai University, Shanghai 200444, China
Abstract： Deform3D numerical simulation software was used to simulate the dynamic deformation, internal stress, microstructure damage, dynamic strain and plastic deformation differences of the hotrolled specimens in the high temperature compression tests using a thermal simulation testing machine (Gleeble 3500). The results showed that the surface area of the sample first decreased and then increased in the process of compression. The surface area was the minimum at about 5 s, and the decrease percentage was 4.1%. Then it increased sharply after 8.4 s with the increase percentage of 14.4%. In the whole compression stage, the maximum stress on both ends of the specimen was about 70 MPa. The value of destructive damage (Damage) was 0.22, the strain was 1.43, and the maximum deformation rate of the top region was 1.19 mm/s. In the process of air cooling and quenching, the temperatures in the corner region of top and bottom boundary surface decreased fastest. The change trend of hightemperature region was transformed from rectangle to rounded rectangle, and then to ellipse.
2021, Vol. 39 
