A number of plate bending elements which include shear suffer from spurious shear effects. So far, however, the techniques that have been used to eliminate these effects involve only the manipulation of the stiffness matrix, and are incapable of accurately predicting the distribution of the shear stress resultants within the element. Herewith, a least squares linear smoothing is applied to the strain matrix of a quadratic, isoparametric symmetrical circular plate element before assembling the stiffness matrix; thereby leading to a better prediction of the stress field within the element.
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