Any one knows how to make the job stop when riks curve starts to decline, i.e when "Time/LPF Inc" is getting negative?
I am not sure about this matter as in Riks method, Time/LPF is getting negative values for several times and then goes back to the positive. However, if you know the maximum load proportion factor or maximum displacement, then you can apply these values to stop it right there.
That might happen but I am interested in stopping it at the first decline. For my application it is ok. So far I have killed it as soon as Time/LPF Inc is getting negative, however that is time consuming when I have hundreds of analysis and the geometry/material is changed every time. Hence I cannot know something I am trying to find out!:)
You can stop it by editing the Riks Step. You can use the stopping criteria (maximum load proportionality factor or maximum displacement).
I agree with Alexandru, if you doing buckling analysis record the load-drop value and use it as a criteria to stop the execution.
Yes, I got the same problem, I think the load proportionality factor was used to multiply the load we defined in load module, but if we use displacement control, no load was applied, and in that case, we cannot use this LPF at all, is that right?
if we use the "max disp" criteria, we must define a Node in the model.
but if we need come DOF or some Node in model define as some criteria,what is the method of apply these?
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