Abstract
Experiments in brittle, amorphous PMMA indicate that the process of dynamic fracture is governed by a micro-branching instability. At a critical velocity, vc, a single crack undergoes an abrupt, well-defined transition to microscopic crack branching. As a result, the velocity of the crack develops oscillations, the mean acceleration decreases and structure is formed on the fracture surface. Beyond vc the total fracture surface created is a linear function of the energy release rate. Micro-branch profiles follow a power law and develop into macroscopic crack branching.
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Reference
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Fineberg, J., Gross, S.P., Sharon, E. (1997). Micro-Branching as an Instability in Dynamic Fracture. In: Willis, J.R. (eds) IUTAM Symposium on Nonlinear Analysis of Fracture. Solid Mechanics and its Applications, vol 49. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5642-4_17
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DOI: https://doi.org/10.1007/978-94-011-5642-4_17
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