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Elastic perfectly plastic contact
Posted 2017年8月21日 GMT-4 15:10 Structural Mechanics Version 5.2a, Version 5.3 0 Replies
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I have two touching geometries and I used a thin elastic layer to model the contact. I determined the spring constant of the thin elastic layer as a function of the spring displacement (uspring) to have a elastic perfectly plastic contact to have slipping displacements. The input values of this function changes along the length of the contact. The stiffness expression is "(abs(solid2.uspring3_tel1)<(1[mm]))*100[MPa]*x". During running my parametric study, at a certain value of the parameter that the spring displacement exceeds the 1[mm] limit and the slipping starts I get error.
I want to know what is the expression for spring constant (like "uspring" for it's displacement) to plot it along the contact length and see what happened. I think maybe after that one point reaches my displacement limit the spring stiffness becomes zero at all of the points of the contact (not only at the "x value" I expected and so my model do not converge. I would be happy to know what kind of expression would be better to model this type of contact to prevent what I think was happening.
Thanks in advance
Hello Ali Vafaei
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