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Deformation Analysis of Notched Rubber Specimens
Author(s) -
Feichter C.,
Major Z.,
Lang R. W.
Publication year - 2006
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.1475-1305.2006.00286.x
Subject(s) - materials science , hyperelastic material , composite material , natural rubber , elastomer , digital image correlation , ultimate tensile strength , deformation (meteorology) , strain (injury) , finite element method , radius , finite strain theory , structural engineering , medicine , computer security , computer science , engineering
The influence of the initial crack tip radius on the strain distribution in the vicinity of the blunted crack tip was determined experimentally by an optical full‐field strain analysis method. These experimental results were compared with the calculations of the commercial finite element code ABAQUS 6.4‐1. For the simulation a suitable hyperelastic material law was chosen and fitted to experimental data of three different tests (uniaxial tensile, planar tensile, biaxial tensile). Two different elastomer grades (SBR and EPDM) were selected for the experimental work. The utilized optical full‐field strain analysis method based on the image correlation technique was found to be an effective tool to determine strains, strain distributions and gradients near to the crack tip for elastomeric materials. Different material behaviour was observed for the two rubber types investigated. While the crack tip was regularly blunted (half circle shape) for EPDM and the strain gradient was low (less steep), the crack tip was sharp (less blunted) with a higher strain gradient for SBR.