Hi Mariog,

My interpretation of the Jacobian, it is some sort of scaling factor for an element used to facilitate the numerical integration from one coordinate system (e.g. 0 to L) to another (-1 to +1) or a left over number to compensate for the conversion from one domain to another. Maybe the distance b/w the coordinates in the element, I've assigned is too small, less than the gaussian integration point of +/- 0.57735 for a 2x2 integration, so the number just blows up.

So I think, there is really some point which we need to stop the refining of mesh. There are some consultant that extract the forces at the toe of the weld from FEA model to calculate the stress from the equilibrium of forces which make it mesh insensitive.

Any other opinion is highly appreciated.

Just correct any wrong statement I've made.

Cheers!!