Authors
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Xiang, F. ; Schneider, K. ; Heinrich, G.
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Title
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New observations regarding fatigue crack paths and their fracture surfaces in natural rubber: Influences of R-ratio and pre-load
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Date
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24.04.2020
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Number
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58521
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Abstract
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Most previous works focusing on the influence of R-ratio on the service life of natural rubber didn’t consider some interesting phenomena. Cracks in both filled and unfilled natural rubber have the tendency to split and propagate into the stress relaxation zone (“backwards” at R·=·emin/emax·=·1/3) with increasing R-ratio. When a “backwards” crack arose, regular ordered striations were observed on the fracture surface. Additionally, the crack growth behaviour of filled natural rubber can differ greatly from catastrophic crack growth to slow “backwards” fatigue growth, even when all loading conditions such as frequency, amplitude and R-ratio were kept constant.
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Publisher
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International Journal of Fatigue
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Wikidata
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Citation
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International Journal of Fatigue 135 (2020) 105508
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DOI
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https://doi.org/10.1016/J.IJFATIGUE.2020.105508
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Tags
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natural rubber crack paths fatigue crack growth fracture surface strain-induced crystallization
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