Jun Zeng1, Fucheng Tian1,*
The International Conference on Computational & Experimental Engineering and Sciences, Vol.27, No.2, pp. 1-1, 2023, DOI:10.32604/icces.2023.09636
Abstract Instability in dynamic fracture suppresses crack velocity from reaching theoretical limit predicted by the
classical linear elastic fracture mechanics (LEFM). In thin systems, crack can accelerate to near the
theoretical limiting velocity without micro-branching instability. A dynamic oscillatory instability is
observed at such extreme crack speed. This sinusoidal oscillation was further found to be governed by
intrinsic nonlinear scale. Using a dynamic phase-field model (PFM) with no attenuation of wave speed, we
successfully reproduce the oscillations in the framework of non-linear deformation. The used PFM model
based on Griffith's theory and derived from the nonconservative Lagrange's equation. To deal with… More >
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