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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1982, Vol. 3 ›› Issue (4): 36-40.
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Wu Yongli
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Abstract: Several Authors have presented numerical results which demonstrated the stiffening of 8-node and 12-node quadrilateral isoparametric elements when distorted from a rectangular shape. In consequence the error introduced by using distorted 8-node or 12-node quadrilateral isoparametric element is significant. The results obtained by distorted elements are essentially consistent with those obtained by undistorted elements if 9-node element is used as quadrilateral isoparametric element and Lagrange polynomials as interpolation functions. Numerical results show that 9-node isoparametric element is superior to 8-node isoparametric element, 12-node isoparametric element and quadrilateral element consisting of two or four linear strain triangles.
Wu Yongli. 9-NODE QUADRILATERAL ISOPARAMETRIC ELEMENT[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1982, 3(4): 36-40.
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