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A three‐dimensional multilayer composite finite element for stress analysis of composite laminates

1993; Wiley; Volume: 36; Issue: 22 Linguagem: Inglês

10.1002/nme.1620362209

1097-0207

Jianhua Han, Suong V. Hoa,

Structural Load-Bearing Analysis

Abstract A three‐dimensional multilayer composite finite element method has been developed based on a composite variational functional which takes three in‐plane strains ε x , ε x , ε xy and three transverse stresses σ z , σ yz , σ xz as the basic variables. The continuity of the transverse stresses σ z , σ yz , σ xz across the laminate thickness is assured a priori by introducing a partial stress field parameter α which is associated with the lower and upper surfaces of a lamina in a laminate. A method has been developed to form the partial stress field based on the assumed displacement field. With this method, a three dimensional (3‐D) multilayer composite finite element is formulated for stress analysis of composite laminates. A numerical example is given, which shows some advantages of this composite element.