Paper Number 3.3
An
Alternative Technique to Evaluate Crack Propagation Path in Hyperelastic
Materials
Renan R. M. Ozelo[1]
Paulo Sollero
University of Campinas
200 Rua Mendeleyev
Campinas, São Paulo, Brazil,
13083-860 CP 6122
Email: renanozelo@fem.unicamp.br
Voice: +55 (019) 3521-3386
Argemiro L. A. Costa
Pirelli Pneus S.A.
871 Avenida Giovanni Battista
Pirelli
Santo André, São Paulo, 09111-340
The analysis of cracks
in tires aims to provide safety and reliable life prediction. Tires’ materials
are usually nonlinear and present a hyperelastic behavior, therefore, the use
of nonlinear fracture mechanics theory and a material constitutive model based
on energy are necessary. The material constitutive model used in this work is
the Mooney-Rivlin.
There are many
techniques available to evaluate the crack propagation path in linear elastic
materials and estimate the growth direction. However, most of these techniques
are not applicable to hyperelastic materials. This paper presents an
alternative technique for modeling crack propagation in hyperelastic materials,
based in the J-Integral, to evaluate
the crack path. The J-Integral is an
energy-based parameter and is applicable to nonlinear materials. The technique
was applied using ABAQUS software and validated with experimental tests.