Publication

Mixed-mode fatigue and fracture behavior of adhesively-bonded composite joints

Thomas Keller
2015
Book Chapters

Abstract

The mixed-mode fatigue and fracture behaviors of adhesively-bonded pultruded glass fiber-reinforced polymer joints are presented in this chapter. These behaviors are based on experimental investigations using asymmetric mixed-mode bending specimens. In such specimens, the crack propagated along paths outside the symmetry plane, and therefore mode partitioning could not be performed in the standardized way as for symmetric specimens. Existing techniques for the characterization of the mixed-mode fracture behavior of adhesively-bonded joints, the partitioning of the fracture mode components, and the modeling of the fiber bridging that affects the total fracture energy are presented in this chapter.

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https://infoscience.epfl.ch/entities/publication/2c8ee6d4-50f4-47a0-af14-4118d6622115

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Thomas Keller
2015
Book Chapters

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/2c8ee6d4-50f4-47a0-af14-4118d6622115

About this result

Related concepts (25)

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

Fracture is the separation of an object or material into two or more pieces under the action of stress. The fracture of a solid usually occurs due to the development of certain displacement discontinuity surfaces within the solid. If a displacement develops perpendicular to the surface, it is called a normal tensile crack or simply a crack; if a displacement develops tangentially, it is called a shear crack, slip band or dislocation. Brittle fractures occur without any apparent deformation before fracture.

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.

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Mixed-mode fatigue and fracture behavior of adhesively-bonded composite joints

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