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Evaluation of stress intensity factor under pure shear stress in orthotropic material
Author(s) -
Shimamoto A.,
Umezaki E.
Publication year - 1998
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.1998.tb01081.x
Subject(s) - orthotropic material , stress intensity factor , materials science , structural engineering , isotropy , composite material , material properties , stress (linguistics) , epoxy , shear (geology) , delamination (geology) , fracture mechanics , engineering , finite element method , geology , paleontology , linguistics , philosophy , physics , subduction , quantum mechanics , tectonics
Various types of composite materials are currently being developed and used for automobiles, airplanes, ships and other structures in response to required service conditions which are getting increasingly more severe. Of growing importance under such circumstances is the study of stress analysis and fracture mechanics for these composite material structures. Particularly, the primary concern in design of structures and machines should be the initiation of cracks due to excessive deformation, delamination in material or other material defects. In evaluating safety, it is indispensable from the structural design point of view that K value should be known by an analysis conducted in advance. In this study, stress intensity factor (mode II) under a pure shear stress was obtained using the photoelastic method and caustic method and applying an isotropic material and orthotropic material (copper fibre epoxy composite (CFEC) developed by the authors), each containing the crack. Results were compared with theoretical values. As a result, this method was found useful and the effect of the direction of the primary axis of this material on the stress intensity factor was clarified.