1. An inquiry about STABILIZE option in ABAQUS analysis
When we study rubber indentation analysis in order to find strain rate in the ABAQUS static, we do
utilize the *STABILIZE option to use the *HYSTERESIS option without UMAT subroutine of Jorgen
(JMPS, 1998). Indentation load increases with strain rate. Extremely low strain rate analysis would
converge to a quasi-static state. In such case, load-depth curve of quasi-static state should be almost
equal to that of static state. When we studied quasi-static analysis using the *STABILIZE option,
however, the indentation maximum load was about 20% larger than the static maximum load. Figure 1
shows the indentation load-depth curves from using the *STABILIZE option for various strain rates
and the lowest one without the option. Although load-depth curves go down with decreasing strain
rate, they don’t converge to the load-depth curve of static state. I wonder this problem will be solved
if I utilize the UMAT subroutine of Jorgen (JMPS, 1998).
P (N)
12
Strain rate
Use option
Static
(/s)
10
1
0.1
0.001
(Quasi static)
8
4
0
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
h (mm)
Fig. 1 Comparison of load-depth curves for using option and static
1