Transonic and supershear crack propagation driven by geometric nonlinearities - CNRS - Centre national de la recherche scientifique
Preprints, Working Papers, ... Year : 2023

Transonic and supershear crack propagation driven by geometric nonlinearities

Abstract

Linear elastic fracture mechanics theory predicts that the speed of crack growth is limited by the Rayleigh wave speed. Although many experimental observations and numerical simulations have supported this prediction, some exceptions have raised questions about its validity. The underlying reasons for these discrepancies and the precise limiting speed of dynamic cracks remain unknown. Here, we demonstrate that tensile (mode I) cracks can exceed the Rayleigh wave speed and propagate at supershear speeds. We show that taking into account geometric non-linearities, inherent in most materials, is sufficient to enable such propagation modes. These geometric non-linearities modify the crack-tip singularity, resulting in different crack-tip opening displacements, cohesive zone behavior, and energy flows towards the crack tip.

Dates and versions

hal-04308704 , version 1 (27-11-2023)

Identifiers

Cite

Mohit Pundir, Mokhtar Adda-Bedia, David S. Kammer. Transonic and supershear crack propagation driven by geometric nonlinearities. 2023. ⟨hal-04308704⟩

Collections

ENS-LYON CNRS UDL
18 View
0 Download

Altmetric

Share

More