The mechanism of fatigue crack growth in rubbers under severe loading: the effect of stress-induced crystallization - Archive ouverte HAL Access content directly
Journal Articles Macromolecules Year : 2010

The mechanism of fatigue crack growth in rubbers under severe loading: the effect of stress-induced crystallization

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Abstract

This paper deals with the mechanism of fatigue crack growth in natural rubber submitted to severe relaxing loading conditions. In one mechanical cycle under such loading conditions, the high level of stress at the crack tip engenders high crystallinity, which halts crack growth in the plane perpendicular to the loading direction. Consequently, the crack bifurcates. Then the fracture surfaces tear, slide and relax simultaneously along a highly crystallized crack tip to form striations. The higher the stress level, the lower the crack growth in the plane perpendicular to the loading direction and the greater the bifurcation phenomenon. This explains why the striation shape evolves from triangular to lamellar during crack propagation.
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hal-01131581 , version 1 (16-03-2015)

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Attribution - CC BY 4.0

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Jean-Benoit Le Cam, Evelyne Toussaint. The mechanism of fatigue crack growth in rubbers under severe loading: the effect of stress-induced crystallization. Macromolecules, 2010, 43 (10), pp.4708-4714. ⟨10.1021/ma100042n⟩. ⟨hal-01131581⟩
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