Na. Hocine et al., EVALUATION OF THE ENERGY PARAMETER-J ON RUBBER-LIKE MATERIALS - COMPARISON BETWEEN EXPERIMENTAL AND NUMERICAL RESULTS, Engineering fracture mechanics, 55(6), 1996, pp. 919-933
The general purpose of our study is the determination of the energy pa
rameter J when dealing with fracture of rubber-like materials. The ene
rgy parameter J is expressed in a multiplicative form in which a calib
ration factor is introduced in order to take into account the finite d
imensions of the specimen. The parameter J, issued from fracture tests
performed on S.E.N.T specimen of an E.P.D.M rubber is compared with t
he the J integral which is computed using a finite element procedure f
or the non-linear elastic materials with large deformation. The numeri
cal results are in good agreement with the experimental data when cons
idering the deeply cracked specimen (a/w greater than or equal to 0.5)
. Below this limit, a divergence is pointed out which is attributed to
a lack of accuracy of the identification procedure used to determine
the experimental calibration factor. When this one is determined using
the numerical J integral results, a better concordance is obtained. C
opyright (C) 1996 Elsevier Science Ltd