On the Selection of Stress Parameters for Hybrid/Mixed Finite Elements
Rationales for selection of stress parameters of hybrid/mixed finite elements are discussed in some details. Specific guidelines are then given for choosing appropriate stress terms in conjunction with the assumed displacement field. The primary considerations are: suppression of kinematic deformation modes and a favorable constraint index for application to limiting cases. Four different elements are used to illustrate the suggested guidelines.
KeywordsThin Beam Rigid Body Mode Assumed Stress Element Stiffness Matrice Curve Beam Element
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