Fracture Mechanics Analysis of Debond Growth in a Single-Fiber Composite under Cyclic Loading

Mechanics of Composite Materials 2011
Andrejs Pupurs, Janis Varna

A model is developed to analyze the growth of a fiber/matrix debond along a broken fiber interface in a single-fiber composite subjected to tension-tension fatigue. The Paris law expressed in terms of debond growth and strain energy release rates is used. An analytical solution for the Mode II energy release rate G II is obtained for long debonds, where the interface crack growth is self-similar. For short debonds, the interface crack interacts with the fiber break, and therefore a FEM modeling in combination with the virtual crack closure technique was performed to calculate the increase in G II . Finally, the calculated G II dependences are summarized in simple expressions that are used to simulate the debond growth in fatigue. A parametric study of the effect of Paris law parameters on the debond growth is performed.

Keywords
debonding; energy release rate; fatigue; fiber break; Mode II; Paris law
DOI
10.1007/s11029-011-9190-1
Hyperlink
http://link.springer.com/article/10.1007/s11029-011-9190-1

Pupurs, A., Varna, J. Fracture Mechanics Analysis of Debond Growth in a Single-Fiber Composite under Cyclic Loading. Mechanics of Composite Materials, 2011, Vol.47, Iss.1, pp.109-124. ISSN 0191-5665. e-ISSN 1573-8922. Available from: doi:10.1007/s11029-011-9190-1

Publication language
English (en)