SYMPOSIA PAPER Published: 01 January 1995
STP14605S

The J Integral as a Fracture Criterion of Robber-Like Materials:A Comparative Study Between a Compliance Method and an Energy Separation Method

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The expression of the energetic parameter J proposed by Andrews is re-examined and the influence of finite dimensions is introduced, leading to a general expression of the form J=k(W0).W0.F(aw).a

In this work, fracture tests have been performed on an EPDM based polymer, using two kinds of specimen geometry.

The different terms of this expression are identified using two different approaches:- the first one is based upon a compliance method; - the second one is an energy separation procedure we have developed. Interesting results have been pointed out in this work: - In first, SENT and CCT specimen leads to a similar function k(W0) which is clearly depending on both the non linear behaviour of the material and of conditions of loading. - Secondly, when considering CCT specimen, the calibration factor F(a/w), derived from the second method, is in good agreement with the Linear Elastic Fracture Mechanics (LEFM) equivalent one. - At least, concerning the deeply cracked specimens, the J estimation using the above mentioned multiplicative form and the direct evaluation from the energy rate dU*/dA give quite concordant results.

Author Information

NaÏt-Abdelaziz, M
Laboratoire de Mecanique de Lille, IUT GMP, villeneuve d'Ascq, France
Ghfiri, H
Laboratoire de Mecanique de Lille, IUT GMP, villeneuve d'Ascq, France
Mesmacque, G
Laboratoire de Mecanique de Lille, IUT GMP, villeneuve d'Ascq, France
Nevière, RG
Centre de Recherches du Bouchet, Vert-Le Petit, France
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Details
Developed by Committee: E08
Pages: 380–396
DOI: 10.1520/STP14605S
ISBN-EB: 978-0-8031-5294-6
ISBN-13: 978-0-8031-1882-9