XANSYS Message: 18542 [Go back to message list] [bookmark on del.icio.us]
No rating yet Subject: Re: Load step and substeps Author: Martin Liddle Date: 2000-12-01 05:03:00In article , Subramanyam_Vinnakota writes >iam doing nonlinear analysis in ansys which involves all the three kinds of >nonlinearities i.e., material,contact and geometric nonlinearity. a >displacement constraint of 200mm is to be applied . this iam applying single >loadstep with no. of substeps (400 approx) and automatic time stepping on >but iam facing convergence problem after a particular substep. i would like >to know wil it make any difference if apply the displacement in no. of load >steps having substeps or single load step with no of substeps will this lead >to convergence
How big is your structure? e.g. how does 200mm compare to the representative thickness? Do you have friction? What contact elements are you using? What is the _exact_ message when you get a convergence failure? Do you get any clues by looking at the unconverged displacement solution? Which version of ANSYS? Do you have solution control on? In general I would suggest one load step with a number of substeps is the way to go.