September 7, 2021 at 9:04 am

Erik Kostson

Ansys Employee

Hello

This post might be of help:

Small example here:

Two steps, and we change property in the 2nd one (this 2nd property has double the Young's mod. compared to the first one).

As we expect the displacement for the same force in the 2nd step needs to be half since we double the Young's modulus.

If we do not do that, and suppress the command snippet, then it is the same as expected.

The above is quite advanced and not recommended (since we need to know apdl, and non standard commands like mpchg). For new users and not advanced apdl users, I would recommend the approach below:

Another way is to define a temp. dependent Young's modulus in engineering data (see below), and use the temperature in the model to change properties.

Then turn off thermal strain calculations and define a thermal condition (see below):

We see then that in the second and third step the reaction doubles as the Young's modulus doubles and hence for the same displacement we would need double the force to obtain that displacement which is correct.

With the thermal condition suppressed, we get as expected 5009 N through the simulations since we do not change material.

All the best

Erik

This post might be of help:

Small example here:

Two steps, and we change property in the 2nd one (this 2nd property has double the Young's mod. compared to the first one).

As we expect the displacement for the same force in the 2nd step needs to be half since we double the Young's modulus.

If we do not do that, and suppress the command snippet, then it is the same as expected.

The above is quite advanced and not recommended (since we need to know apdl, and non standard commands like mpchg). For new users and not advanced apdl users, I would recommend the approach below:

Another way is to define a temp. dependent Young's modulus in engineering data (see below), and use the temperature in the model to change properties.

Then turn off thermal strain calculations and define a thermal condition (see below):

We see then that in the second and third step the reaction doubles as the Young's modulus doubles and hence for the same displacement we would need double the force to obtain that displacement which is correct.

With the thermal condition suppressed, we get as expected 5009 N through the simulations since we do not change material.

All the best

Erik