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发表于 2013-7-2 22:19:48
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来自 浙江杭州
后者。
但是据LSTC技术支持的解释,应避免用42号材料。
Is there a difference in UMAT41-UMAT50? Is the routine name of UMAT only connected with MT in MAT_USER_DEFINES_MATERIAL_MODEL?
Answer:
Avoid using umat42 and the vectorized routines umat48v and umat49v -- these are special, undocumented subroutines that do not reside in dyn21 and thus the user cannot modify them. Aside from those exceptions, it doesn't matter which MT (from 41 to 50) you choose.
The umat subroutine used is controlled directly by MT and by IVECT.
If IVECT is set to 1, the "v" (vectorized) version of the umat subroutine will be called, e.g., subroutine umat41v is called if MT=41 and IVECT=1.
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