Simulation of Stress Concentration Problems in Laminated Plates by Quasi-Trefftz Finite Element Models
AUTOR(ES)
Bussamra, Flávio Luiz de Silva, Lucena Neto, Eliseu, Rodrigues, Marcos Antonio Campos
FONTE
Lat. Am. j. solids struct.
DATA DE PUBLICAÇÃO
2016-09
RESUMO
Abstract Hybrid quasi-Trefftz finite elements have been applied with success to the analysis of laminated plates. Two independent fields are approximated by linearly independent, hierarchical polynomials: the stress basis in the domain, adapted from Papkovitch-Neuber solution of Navier equations, and the displacement basis, defined on element surface. The stress field that satisfies the Trefftz constraint a priori for isotropic material is adapted for orthotropic materials, which leads to the term "quasi". In this work, the hexahedral hybrid quasi-Trefftz stress element is applied to the modeling of nonsymmetric laminates and laminated composite plates with geometric discontinuities. The hierarchical p-refinement is exploited.
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