Abstract
Crack growth often leads to catastrophic failure of rubber products. Understanding the crack growth mechanism is important for toughening elastomers. This article described in summarized form our recent experimental investigations on fast crack growth in elastomers. The crack-tip features, including the crack-tip profiles and the local crack-tip strain fields, are revealed for a quasi-stationary crack and fast-moving cracks ranging from subsonic to super-shear (intersonic) cracks. The velocity and crack-tip features of fast-moving cracks are discussed in relation to the nonlinear elasticity and viscoelasticity of bulk elastomers. The effects of anisotropic stress softening (anisotropic Mullins effect), which is pronounced in filler-reinforced elastomers, on the crack-tip properties are elucidated. We also describe the characterization of quasi-stationary cracks in elastomers subjected to various types of biaxial loading, providing a basis for the fracture mechanics of elastomers under multiaxial deformation.
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This work was supported by JST, CREST grant number JPMJCR2091, Japan, and the ImPACT Program of the Council for Science, Technology and Innovation (Cabinet Office, Government of Japan).
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Mai, TT., Morishita, Y., Tsunoda, K., Urayama, K. (2021). Experimental Analysis of Fast Crack Growth in Elastomers. In: Heinrich, G., Kipscholl, R., Stoček, R. (eds) Degradation of Elastomers in Practice, Experiments and Modeling. Advances in Polymer Science, vol 289. Springer, Cham. https://doi.org/10.1007/12_2021_109
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