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An iterative approach for the evaluation of delamination stresses in laminated composites
Author(s) -
Barsoum Roshdy S.,
Freese C. E.
Publication year - 1984
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.1620200806
Subject(s) - delamination (geology) , discretization , conjugate gradient method , iterative method , enhanced data rates for gsm evolution , materials science , laminar flow , matrix (chemical analysis) , shear (geology) , structural engineering , composite material , mathematics , computer science , mathematical analysis , algorithm , mechanics , engineering , physics , geology , paleontology , telecommunications , subduction , tectonics
A computational strategy for the evaluation of delamination stresses in multilayered fibre‐reinforced composites is presented. The approach uses special inter‐laminar shear elements and an iterative procedure in the calculation of out‐of‐plane stresses. Both regular and singular elements for the free edge are presented. The solutions are carried on by switching between direct matrix solution methods of small systems of equations and an iterative conjugate gradient method. The proposed discretization avoids ill‐conditioning problems, modelling difficulties and large computational cost associated with three‐dimensional analysis of delamination of holes, cut‐outs, joints and areas of complex stress states.