Publication

Crack front deformation during dynamic heterogeneous fracture

2020
Posters

Abstract

The standard method to study crack front deformation is based on the perturbation approach proposed by Rice , in which the crack front is represented as a line. However, recent studies have shown the importance of the fracture process zone for dynamic heterogeneous fracture. We simulate the deformation of a dynamic crack front propagating along an heterogeneous interface using a boundary integral method coupled with a cohesive zone model, which allows for a fine discretization of the process zone. We study extensively the dynamic deformation process and the final deformed front shape.

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2020
Posters

Abstract

Official source

Related concepts (10)

Fracture mechanics

Fracture mechanics is the field of mechanics concerned with the study of the propagation of cracks in materials. It uses methods of analytical solid mechanics to calculate the driving force on a crack and those of experimental solid mechanics to characterize the material's resistance to fracture. Theoretically, the stress ahead of a sharp crack tip becomes infinite and cannot be used to describe the state around a crack. Fracture mechanics is used to characterise the loads on a crack, typically using a single parameter to describe the complete loading state at the crack tip.

Fracture toughness

In materials science, fracture toughness is the critical stress intensity factor of a sharp crack where propagation of the crack suddenly becomes rapid and unlimited. A component's thickness affects the constraint conditions at the tip of a crack with thin components having plane stress conditions and thick components having plane strain conditions. Plane strain conditions give the lowest fracture toughness value which is a material property.

Deformation (physics)

In physics and continuum mechanics, deformation is the transformation of a body from a reference configuration to a current configuration. A configuration is a set containing the positions of all particles of the body. A deformation can occur because of external loads, intrinsic activity (e.g. muscle contraction), body forces (such as gravity or electromagnetic forces), or changes in temperature, moisture content, or chemical reactions, etc. Strain is related to deformation in terms of relative displacement of particles in the body that excludes rigid-body motions.

Related publications (1)

Crack front deformation during dynamic heterogeneous fracture

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At the breaking point: Three-dimensional fracture in soft brittle solids