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Thanks alot for your answer dear fmk.

hello again! I got "different results" for element 17 by the following command. ... uniaxialMaterial ElasticPPGap 3 1.73e11 -2.4e8 0. 0.01 element zeroLength 17 4 44 -mat 3 -dir 1 ... recorder Element -file ele17L.out -time -ele 17 localForce puts [eleResponse 17 forces] 1-Are there any differences ...

Actually I have tried a range of small values for post yield stiffness and a range of large values for initial stiffness but I thought maybe there is a better way to simulate behavior of bolt in static friction state and following slide. If there is not any, I can live with that but it would be toug...

It would not work properly in this way... A very larg stiffness and plastic zero stiffness would cause a problem in model analysis.

Thanks, I found the problem but another issue has arisen. I am looking for a material to simulate sliding bolt in a slotted hole. A rigid plastic behavior is needed but I could not find any appropriate material for that..could you help me, please?

Hi everyone I want to activate (or add) an element through a static analysis, here is the last part of my code: set F19 [lindex [eleResponse 19] 1] pattern Plain 1 Linear { load 11 10000. 0. 0. } constraints Plain numberer Plain system BandGeneral test NormDispIncr 1.e-6 10 algorithm KrylovNewton in...

Dear all I’m trying to find a suitable material for a zero length element witch implemented to model a “friction bolt that slides in a slotted hole” when the imposed shear force gets to maximum static friction force of the contact bolted surfaces. Since the material behavior should be like “rigid-pl...