To answer my own question: Forces can be applied directly to nodes in UELs, however pressures cannot be used as surfaces are not allowed/defined for ...

Residual I changed the formulation of the residual from residual = K*d * weight * jacobian to residual = B*Stress * weight * jacobian I also pla...

Abaqus Solver Hi I think Abaqus may be doing some sort of convergence check, which could be the extra increment. I am currently checking my formulat...

Success Some time ago, I had managed to sort this problem out. It was indeed a change in the shape function ordering. I verified the results with t...

The fiber data which I have, is unique for each integration point. Thus at each integration point, I should have a local coordinate system with 1 dir...

Hi the error message is from a cook membrane test with the UEL. There were 8 elements in total, 4 of which had a shear force applied to one surface,...

I am running in Abaqus standard. I think it may have to do with the B-matrix, or node ordering. I have created shape functions in the standard ord...

Orient fibers Hi I have the fiber direction data in X, Y, and Z components, as well as the corresponding position in 3D space, as X, Y and Z coordin...