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IMPROVED TRANSVERSE SHEAR STRESSES IN COMPOSITE FINITE ELEMENTS BASED ON FIRST ORDER SHEAR DEFORMATION THEORY
Author(s) -
ROLFES R.,
ROHWER K.
Publication year - 1997
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/(sici)1097-0207(19970115)40:1<51::aid-nme49>3.0.co;2-3
Subject(s) - antisymmetric relation , shear (geology) , transverse plane , transverse shear , simple shear , structural engineering , finite element method , shear and moment diagram , mechanics , materials science , bending , physics , engineering , composite material , bending stiffness , mathematical physics
Abstract A method for calculating improved transverse shear stresses in laminated composite plates, which bases on the first‐order shear deformation theory is developed. In contrast to many recently established methods, either higher‐order lamination theories or layerwise theories, it is easily applicable to finite elements, since only C 0 ‐continuity is necessary and the numerical effort is low. The basic idea is to calculate the transverse shear stresses directly from the transverse shear forces by neglecting the influence of the membrane forces and assuming two cylindrical bending modes. Shear correction factors are no longer required, since the transverse shear stiffnesses are also provided. Numerical examples for symmetric cross‐ply and antisymmetric angle‐ply laminates show the superiority of the method against using shear correction factors. Furthermore, results obtained with MSC/NASTRAN, which uses a similar but simplified approach, are surpassed. © 1997 by John Wiley & Sons, Ltd.