THE STUDY ON GENERALIZED CONFORMING 6-NODE CURVED QUADRILATERAL ELEMENT

Three 6-node curved quadrilateral elements, ATFM6, M6 and Q6λ10, are obtained based on generalized conforming principle. Displacement field in plane Cartesian coordinate system of elements ATFM6 and M6 are constructed from analytical trial functions (ATF)and complete cubic polynomial, respectively. Element Q6λ10 is obtained by adding ten generalized bubble displacement terms to compatible isoparametric element Q6. All the three elements can pass patch test under arbitrary curved quadrilateral mesh. Numerical experiments show that they have excellent accuracy and insensitivity to geometric distortion.