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Dynamics of crack front waves in three-dimensional material failure.
Sanhita Das1, Yuri Lubomirsky1, Eran Bouchbinder1
1Chemical and Biological Physics Department, Weizmann Institute of Science, Rehovot 7610001, Israel.
Physical Review. E
|November 18, 2023
Summary
Crack front waves (FWs) in 3D materials exhibit unique dynamics. This study reveals their solitonic behavior and slower-than-linear propagation, with coupled in- and out-of-plane FWs appearing under specific loading conditions.
Area of Science:
- Materials Science
- Solid Mechanics
- Computational Physics
Background:
- Crack front waves (FWs) are dynamic phenomena in 3D materials.
- Understanding FW propagation is crucial for material failure analysis.
Purpose of the Study:
- To investigate the dynamics of crack front waves in 3D materials.
- To explore the influence of rate-dependent fracture energy and loading conditions on FW behavior.
Main Methods:
- Utilized a 3D phase-field computational platform.
- Incorporated rate-dependent fracture energy Γ(v) and intrinsic length scales.
- Introduced in-plane and out-of-plane perturbations, including antiplane loading.
Main Results:
- In-plane FWs show weak time dependence and solitonic behavior upon interaction.
- Nonlinear regime propagation is slower than predicted by linear theory.
- Coupled in- and out-of-plane FWs are excited by perturbations, persisting under mixed loading.
Conclusions:
- The 3D phase-field model accurately reproduces FW dynamics, including high-speed instabilities.
- FW interactions exhibit solitonic characteristics.
- Complex loading conditions can lead to persistent coupled in- and out-of-plane crack front wave propagation.
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