Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*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.

Students Click Here


ANSYS - Plastic strain energy

ANSYS - Plastic strain energy

ANSYS - Plastic strain energy

Dear all,

I am currently undergoing my dissertaation on non linear FEA of pressure vessels. I am investigating certatin failure criteria of pressure vessels, and one requires me to calculate plastic strain energy for a given applied load parameter, in this case, internal pressure.

I see that ANSYS has a strain energy tool when calculating a solution. I am wondering if there is any way to calculate specific plastic strain energy, as opposed to total strain energy.

Thanks in advance.


RE: ANSYS - Plastic strain energy

Hi Fergus,

Ansys strain energy SENE includes both elastic and plastic strain energy (link). You could use ETABLE to get plastic strain energy density and volume to calculate the plastic strain energy.

Before solving, remember to include all output:


outres, erase, all
outres, all, all 

For a simple static case, my_sene = (my_sendE + my_sendP)*my_volu.


set, last
etable, my_sene, sene 

etable, my_sendE, send, elastic ! elastic strain density
etable, my_sendP, send, plastic ! plastic strain density
etable, my_volu, volu ! element volume

smult, my_seneE, my_sendE, my_volu, 1, 1
smult, my_seneP, my_sendP, my_volu, 1, 1

ssum ! Adds it up

! Extract energy sums
*get, my_sene_sum, ssum,0, item, my_sene   ! total strain energy
*get, my_seneE_sum, ssum,0, item, my_seneE ! elastic strain energy
*get, my_seneP_sum, ssum,0, item, my_seneP ! plastic strain energy 

Kind regards,

RE: ANSYS - Plastic strain energy


Is there a difference between using

send, plastic / eppl, eqv


send, elastic / epel, eqv ?

RE: ANSYS - Plastic strain energy

Hi L_K,

Quote (L_K)

Is there a difference between using
send, plastic / eppl, eqv
send, elastic / epel, eqv ?

Please see link for equivalent strain calculations. This is different from energy calculations (link).

From ETABLE documentation:
send, plastic = plastic strain energy density
send, elastic = elastic strain energy density
eppl, eqv = plastic equivalent strain
epel, eqv = elastic equivalent strain

Kind regards,

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.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - The Criticality of the E/E Architecture
Modern vehicles are highly sophisticated systems incorporating electrical, electronic, software and mechanical components. Mechanical systems are giving way to advanced software and electronic devices, driving automakers to innovate and differentiate their vehicles via the electric and electronic (E/E) architecture. As the pace of change accelerates, automotive companies need to evolve their development processes to deliver and maximize the value of these architectures. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
Modern cars, trucks, and other vehicles feature an ever-increasing number of sophisticated electrical and electronic features, placing a larger burden on the wiring harness that enables these new features. As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - Modeling and Optimizing Wire Harness Costs for Variation Complexity
This paper will focus on the quantification of the complexity related costs in harness variations in order to model them, allowing automated algorithms to optimize for these costs. A number of real world examples will be provided as well. Since no two businesses are alike, it is the aim of this paper to provide the foundational knowledge and methodology so the reader can assess their own business to model how variation complexity costs affect their business. 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:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close