Hello everyone
Hope you are fine.
I have 2 questions about USDFLD:
1. In case I have 3 Materials (3 Field variables) and I am using USDFLD in the 4th step, by which Material the analysis gets done in 3 previous steps?
In another words, before USDFLD starts working, which material is used?
2. Is there a way to set stress, strain or any other variable to zero during analysis?
I want to use USDFLD in the 4th step for a specific part of my model, but I want the state of that part of the model at 4th step serve as the zero/reference state and, for example, strains above or below that state determine the choice of Materials.
For example:
strain in an arbitrary element of the part at the end of step 3 is 0.02
My USDFLD subroutine starts working at step 4
in this subroutine I specified stains below 0.03 get Field variable 1 and stains above 0.03 get Field variable 2
In the 4th step I have a loading that increases that element's strain by 2 other percents and makes it 0.04
in this case my subroutine will give Field variable 2 to the element however I want the initial strain at the beginning of the 4th step serve as the reference/zero state and by a 2 percent increase in strain it would be still under 0.03 criteria and subroutine gives it Field variable 1.
consider this issue in a part with thousands of element to which USDFLD is applied.
Please let me know if my questions are not clear enough,
Best regards,
Yunus.
Hope you are fine.
I have 2 questions about USDFLD:
1. In case I have 3 Materials (3 Field variables) and I am using USDFLD in the 4th step, by which Material the analysis gets done in 3 previous steps?
In another words, before USDFLD starts working, which material is used?
2. Is there a way to set stress, strain or any other variable to zero during analysis?
I want to use USDFLD in the 4th step for a specific part of my model, but I want the state of that part of the model at 4th step serve as the zero/reference state and, for example, strains above or below that state determine the choice of Materials.
For example:
strain in an arbitrary element of the part at the end of step 3 is 0.02
My USDFLD subroutine starts working at step 4
in this subroutine I specified stains below 0.03 get Field variable 1 and stains above 0.03 get Field variable 2
In the 4th step I have a loading that increases that element's strain by 2 other percents and makes it 0.04
in this case my subroutine will give Field variable 2 to the element however I want the initial strain at the beginning of the 4th step serve as the reference/zero state and by a 2 percent increase in strain it would be still under 0.03 criteria and subroutine gives it Field variable 1.
consider this issue in a part with thousands of element to which USDFLD is applied.
Please let me know if my questions are not clear enough,
Best regards,
Yunus.
