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Hello, Distorted elements usually have determinant of Jacobian almost null or even negative which may cause numerical error in the analysis. Guess you should create a new mesh without distorted elements.

Hello pt75, The link you posted presents the formulation for Plane Stress or Plane Strain, not plate bending element. The formulation for Plate Bending is much more complex. Anyway, did you fixed your problem? Answer here, otherwise.

I mean, when studying plate bending elements I arrived to a non-conforming element which according to the literature the displacement along a common side between two elements may not be the same. So, my point is: what's the explanation for these elements converge if one of the FEM criterias of...

Why non-conforming elements may converge if one of the criterias of convergence is the compatibility between the elements?

That's the algorithm. Feel free to ask any doubt. It's on MathCAD 14.http://files.engineering.com/getfile.aspx?folder=3055a363-232c-4395-a0f8-27cc57fb79c3&file=Plate_Algorithm.xmcd

Hi everyone, I'm creating an algorithm to calculate displacement on plates and I'm following the calculations steps of the example 13.1 of the book "Enegy and Finite Element Methods in Structural Analysis" on page 585. My algorithm (made on MathCAD) does not converge to the exact solution as I...