Error in testing hourglass: An example from Abaqus benchmark

[ZhengZQ007]

To compare the technique to deal with the hourglassing of first-order uniform-strain elements between Abaqus explicit and radioss, I used an example from Abaqus benchmark. OpenRadioss failed to finish the calculation due to “**ERROR : TIME STEP LESS OR EQUAL DTMIN FOR SOLID ELEMENTS” when I select reduced-integration element formulations (Isolid=1, 2 and 24). But the full integration element formulations (Isolid=14, 17 and 18) can complete the calculation successfully. The attached files contain relevant Rad files.

expl_bending.zip

[PaulAltair]

Adding a slightly more conservative timestep factor (0.8 rather than 0.9), it runs ok (using the Isolid = 24 as sent)
DT-BRICK-0.8.zip

[ZhengZQ007]

Thanks very much.