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A hybrid stiffness matrix for orthotropic sandwich plates with thick faces
Author(s) -
Kraus Hans Dieter
Publication year - 1977
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1620110809
Subject(s) - orthotropic material , stiffness , plate theory , materials science , boundary value problem , stiffness matrix , composite material , sandwich structured composite , structural engineering , matrix (chemical analysis) , mathematical analysis , finite element method , mathematics , composite number , engineering
A stiffness matrix is derived for a rectangular orthotropic sandwich plate element with thick faces by the assumed stress hybrid approach. It will be demonstrated that an independent polynomial can be used for the internal forces of the sandwich plate by the membrane theory (assumption of thin faces) and also for the additional moments and shear forces of the faces. The boundary displacements are approached solutions of the homogeneous differential equation of a sandwich beam.