我的材料是自己定义的 Step number is -1
STEP NUMBER = 1
Eqs. New Profile Ave. Bandwidth
5384 134548 48
DIRECT METHOD
ITERATION VELOCITY RELATIVE VELOCITY RELATIVE FORCE SOLVING TIME
NUMBER NORM ERROR NORM ERROR NORM (SEC)
Error:--illegal flow stress detected at element # 1 of Obj. 1
Strain, str. rate, temp. & flow stress are: 0.000000D+00 0.100000D-01 0.250000D+03 0.000000D+00
Error:--illegal flow stress detected at element # 2 of Obj. 1
Strain, str. rate, temp. & flow stress are: 0.000000D+00 0.100000D-01 0.250000D+03 0.000000D+00
Error:--illegal flow stress detected at element # 3 of Obj. 1
Strain, str. rate, temp. & flow stress are: 0.000000D+00 0.100000D-01 0.250000D+03 0.000000D+00
Error:--illegal flow stress detected at element # 4 of Obj. 1
Strain, str. rate, temp. & flow stress are: 0.000000D+00 0.100000D-01 0.250000D+03 0.000000D+00
Error:--illegal flow stress detected at element # 5 of Obj. 1
Strain, str. rate, temp. & flow stress are: 0.000000D+00 0.100000D-01 0.250000D+03 0.000000D+00
More illegal flow stresses .....

我也遇到此问题，换了库里的标准材料也不行。。。。

ITERATION VELOCITY RELATIVE VELOCITY RELATIVE FORCE SOLVING TIME
NUMBER NORM ERROR NORM ERROR NORM 我也遇到同样的问题，什么原因?求各位大神指教。