×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# How to define a time dependent modulus of elasticity in abaqus explicit?

## How to define a time dependent modulus of elasticity in abaqus explicit?

(OP)
Hi all,
I want to model a material with time dependent modulus of elasticity. I think I should do it with VUSDFLD but I'm beginer to write subroutines. If anyone can help me with change my INP file I would thank.
Regards

### RE: How to define a time dependent modulus of elasticity in abaqus explicit?

Actually, you don’t need subroutines to do this. What’s more it can all be done in CAE:
- in material editor select Elastic behavior, change Number of field variables to 1 and specify Youngs’s modulus and Poisson’s ratio pairs for each value of field variable (set Field 1 as 0,1,2,...).
- define amplitude, type time values in the first column while in the Amplitude column put corresponding values of Field 1 from the previous step (0,1,2,...). So for example this pair: Time=6, Amplitude=2 means that at t=6 Abaqus will use Young’s modulus assigned to Field=2.
- in the Load module select Create Predefined Field, choose analysis step, Other and Field. Select whole model. Leave Field variable number as 1, specify magnitude of 1 and select amplitude created in the previous step.

If you don’t use CAE, here’s keyword version:

But it should be *Elastic, dependencies=1

### RE: How to define a time dependent modulus of elasticity in abaqus explicit?

(OP)
Thank you for reply, but in Load module when I create predefined Field and choose analysis step, there is no option to choose Other and Field. Would you please help me with it?
I should say that my analysis step is dynamic explicit.

### RE: How to define a time dependent modulus of elasticity in abaqus explicit?

In versions older than 2018 this feature is not supported in CAE. If you use Abaqus from before 2018 you will have to edit input file and add *FIELD keyword as described in the previously linked thread.

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

#### Resources

White Paper - PLM and ERP: Their Respective Roles in Modern Manufacturing
Leading manufacturers are aligning their people, processes, and tools from initial product ideation through to field service. They do so by providing access to product and enterprise data in the context of each personâ€™s domain expertise. However, it can be complicated and costly to unite engineering with the factory and supply chain. Download Now

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!