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my model is a 3D structure with fiber elements.

when I run model with time step = 0.01 sec, it converges, but with time step = 0.005 and 0.008 , it doesn't converge. why?

please help me.

why when I reduce time step, the analysis fail?

in source code: :Element (tag, ELE_TAG_FourNodeQuad), theMaterial(0), connectedExternalNodes(4), Q(8), pressureLoad(8), thickness(t), pressure(p), Ki(0) { pts[0][0] = -0.5773502691896258; pts[0][1] = -0.5773502691896258; pts[1][0] = 0.5773502691896258; pts[1][1] = -0.5773502691896258; pts[2][0] = 0....

I am ebe79442114, excuse me but I have been bonded from this site. one another question: should I filter Acceleration or displacement output? --------------------------------------------------------- if I don't filter output, results is: xi is: 0.0392565750178 Wn(Hz) is: 1.30922183127 pic: freeimage...

in 2D analysis I can use PIM material with Von-Mises and PDM material with dr*ger-pruger type.

PDM material is for clay and PIM material is for sand, is this true or am i wrong?

ebe79442114.

I bounded from this site because i post DR*G word.