Determining step time at first yield
Determining step time at first yield
(OP)
Hi,
I'm conducting three point bending, displacement controlled. I would like
to calculate the yield moment by determining at what step time the first element yields. Does anyone know how I can achieve this?
I'm conducting three point bending, displacement controlled. I would like
to calculate the yield moment by determining at what step time the first element yields. Does anyone know how I can achieve this?





RE: Determining step time at first yield
RE: Determining step time at first yield
RE: Determining step time at first yield
RE: Determining step time at first yield
I have a script currently, I would just like to implement this into my script.
But where do I find in the history or field data the ACYIELD or PE or PEEQ data for the entire model (is this even possible?). Whenever I plot this, I get the plots from all the elements.
I'm hoping to create a plot with step time on x-axis, and on y-axis ACYIELD, PE or PEEQ for the entire model.
RE: Determining step time at first yield
I see two realistic options:
1. Use *El Print to write PEEQ into the .dat for every integration point in every frame. Then you can use a script to check if the maximum value (see Summary option) is larger than zero.
2. In the Scripting Users Manual is in Section 9.10.1 an example script, that looks for the Mises stress in each element in each frame. With few modifcations it can be used for your task.
RE: Determining step time at first yield
RE: Determining step time at first yield
I started writing a script which would check my maximum von mises stresses (=yielding stress for yield moment) after each analysis and would automatically reduce the prescribed plate displacement in increments until the max von mises stresses = yield stress of my material. But that would lead to countless iterations and a lot of computational effort.