Straight cracks in dynamic brittle fracture
O. Pla, F. Guinea, E. Louis, S.V. Ghaisas, and L. M. Sander
TL;DR
This paper investigates how inertial and dissipative effects influence the stability and shape of cracks in brittle materials at high velocities, using lattice simulations to explain experimental observations.
Contribution
It demonstrates that dissipation stabilizes straight cracks at high velocities, providing new insights into brittle fracture dynamics.
Findings
Dissipation stabilizes straight cracks
Inertial cracks are highly unstable
Results explain recent PMMA experiments
Abstract
We study the dynamics of cracks in brittle materials when the velocity of the crack is comparable to the sound velocity by means of lattice simulations. Inertial and damped dynamics are analyzed. It is shown that dissipation strongly influences the shape of the crack. While inertial cracks are highly unstable, dissipation can stabilize straight cracks. Our results can help to explain recent experiments on PMMA.
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Taxonomy
TopicsRock Mechanics and Modeling · Geophysical Methods and Applications · High-Velocity Impact and Material Behavior