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Updated: May 27, 2026

Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation

Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation

Published on: September 29, 2019

Crack front dynamics across a single heterogeneity.

J Chopin¹, A Prevost, A Boudaoud

¹Laboratoire de Physique Statistique, Ecole Normale Supérieure, UPMC Paris 06, Université Paris Diderot, CNRS, 24 rue Lhomond, 75005 Paris, France.

Physical Review Letters

|November 24, 2011

Summary

This summary is machine-generated.

Crack front dynamics at an elastomer-substrate interface reveal nonlinear motion. A standard theory accurately predicts steady states but fails during dynamic crack propagation and detachment from defects.

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Area of Science:

Materials Science
Solid Mechanics
Fracture Mechanics

Background:

Crack propagation at interfaces is crucial for material durability.
Understanding crack front dynamics in heterogeneous materials remains challenging.

Purpose of the Study:

To investigate the spatiotemporal dynamics of crack fronts.
To analyze crack behavior on homogeneous and patterned elastomer-substrate interfaces.
To evaluate the applicability of existing theories to dynamic crack phenomena.

Main Methods:

Characterization of crack front kinematics.
Analysis of crack profiles on patterned substrates.
Comparison of experimental observations with nonlocal elasticity theory.

Main Results:

The equation of motion for crack fronts on homogeneous substrates is intrinsically nonlinear.
Nonlocal elasticity theory accurately describes steady crack profiles, except for large slopes.
The standard theory fails to predict dynamic crack relaxation and pinch-off behavior after defect interaction.

Conclusions:

Existing linear theories with nonlocal elasticity have limitations in describing dynamic crack front behavior.
Heterogeneities significantly influence crack front dynamics.
Further research is needed to develop more comprehensive models for crack propagation in complex media.