TY - EJOU AU - Lee, Keejoo AU - Cho, Chahngmin AU - Lee, Sung W. TI - A Geometrically Nonlinear Nine-Node Solid Shell Element Formulation with Reduced Sensitivity to Mesh Distortion T2 - Computer Modeling in Engineering \& Sciences PY - 2002 VL - 3 IS - 3 SN - 1526-1506 AB - A geometrically nonlinear assumed strain formulation is introduced in conjunction with bubble function displacements to improve the performance of a nine-node solid shell element. The assumed strain field has been carefully selected to avoid both element locking and undesirable spurious kinematic modes. The results of numerical tests demonstrate that the present approach leads to an element that is significantly less sensitive to mesh distortion than the existing element. KW - assumed strain formulation KW - solid shell element KW - geometrically nonlinear KW - and bubble function DO - 10.3970/cmes.2002.003.339