Learning Forum

[blmcdona]

I am subjecting a simply-supported steel beam to an acceleration in Harmonic to simulate the effects of earthquakes, in which the beam yields.  Is there a way to insert a plastic strain object in the solution section?  I am able to determine deformation, stress, and total strain, but not plastic strain.

[Erik Kostson]

 

Hi

 

Harmonic analysis is a linear type, hence we can not include nonlinearities such as material nonlinearities.

 

You can use a full transient analysis imposing a transient earthquake load/accel., and then also have and use nonlinear material, and look at plasticity (e.g., plastic strains).

 

All the best

 

Erik

 

[blmcdona]

I am using transient analysis for earthquake.  However, I am not getting plastic strain due to the following issue:

"All nonlinearities are ignored while solving the MSUP transient systems."

Is there a way to have mode superposition include nonlinearities?

[peteroznewman]

In Workbench, if you have linked the Solution cell of a Modal analysis to the Setup cell of a Transient Structural model, you have a MSUP setup.

Delete the link and the Transient Structural will become a Full Transient setup.

The MSUP is a linear analysis so there is no way to include nonlinearities.