*MAP SOLUTION for non NLGEOM analysis?
*MAP SOLUTION for non NLGEOM analysis?
(OP)
I am carrying out an analysis where I'm mapping the solution from one mesh (Model 1) to different meshes (Model 2 etc.) of the same geometry. Cracks are then introduced into the latter. The analysis is not NLGEOM.
I'm finding that some regions of Model 1 are not located in Model 2, with the result that stresses etc. in those regions of the Model 2 are set to zero. However, the undeformed geometry of both meshes is in fact the same.
I suspect that this failure to map properly is because the *MAP SOLUTION facility assumes that the analysis is NLGEOM and so maps from the deformed configuration of Model 1 to the undeformed Model 2. Can anyone confirm that is indeed the case?
If so, any advice on how I can get around this in a simple manner?
I'm finding that some regions of Model 1 are not located in Model 2, with the result that stresses etc. in those regions of the Model 2 are set to zero. However, the undeformed geometry of both meshes is in fact the same.
I suspect that this failure to map properly is because the *MAP SOLUTION facility assumes that the analysis is NLGEOM and so maps from the deformed configuration of Model 1 to the undeformed Model 2. Can anyone confirm that is indeed the case?
If so, any advice on how I can get around this in a simple manner?





RE: *MAP SOLUTION for non NLGEOM analysis?
I read about a code Zencrack that you might find useful.
http://www.zentech.co.uk/zencrack.htm
I think it is designed as an add-on to ABAQUS. Unfortunately, I do not have access to it so I am not able to detail.
I have just noticed that *MAP SOLUTION uses UNBALANCED STRESS, that is probably uses the same approach as for imposing initial stress states. As far as I know this approach relies on trying to enforce the equilibrium by 'adjusting' the user-supplied initial state of stress. When I tried it I ended up with zero stress, i.e. ABAQUS eliminated entirely the initial stress field.
RE: *MAP SOLUTION for non NLGEOM analysis?
I'm actually mapping a field from a weld simulation to a variety of meshes (potentially) containing cracks in the same geometry. The field doesn't get eliminated in the new mesh. In fact, after the equilibrium step, it's a very good representation of the residual stress field in the old model in parts. However, some regions of the new model don't receive any stresses at all because I believe they lie outside the deformed configuration of the old model. The equilibrium step after the mapping adjusts things to restore stresses there; but I'm not happy with the overall mapped solution.
RE: *MAP SOLUTION for non NLGEOM analysis?
Would it be difficult to adjust the node coordinates in the new model to match the deformed mesh in the old model ?