Abstract
Mindlin plate analysis is carried out by GLS (Galerkin/Least Square) FEM (Finite Element Method) in order to avoid shear locking. Variational principle including transverse shear strain is formulated based on Hu-Washizu and Hellinger-Reissner’s principle. The GLS term is obtained by the square of Eluer’s equation of this functional. The same interpolation function can be used for nodal valuable z-displacement w, rotational angle βa and Lagrange multiplier (transverse shear stress) λa3. Bending of circular plate is analyzed by this method using P1 and Q1 element. It is found that GLS is effective for avoiding shear locking of Mindlin model in case plate thickness is thin.
