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Journal of Materials Science

, Volume 41, Issue 14, pp 4604–4610 | Cite as

Micro-mechanical theory of macroscopic stress-corrosion cracking in unidirectional GFRP

  • H. SekineEmail author
  • P. W. R. Beaumont
Article

Abstract

A micro-mechanical theory of macroscopic stress-corrosion cracking in a unidirectional glass fibre-reinforced polymer composite is proposed. It is based on the premise that under tensile loading, the time-dependent failure of the composite is controlled by the initiation and growth of a crack from a pre-existing inherent surface flaw in a glass fibre. A physical model is constructed and an equation is derived for the macroscopic crack growth rate as a function of the apparent crack tip stress intensity factor for mode I. Emphasis is placed on the significance of the size of inherent surface flaw and the existence of matrix crack bridging in the crack wake. There exists a threshold value of the stress intensity factor below which matrix cracking does not occur. For the limiting case, where the glass fibre is free of inherent surface flaws and matrix crack bridging is negligible, the relationship between the macroscopic crack growth rate and the apparent crack tip stress intensity factor is given by a simple power law to the power of two.

Keywords

Stress Intensity Factor Glass Fibre Crack Growth Rate Matrix Crack Average Tensile Stress 

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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.Department of Aerospace EngineeringTohoku UniversityAoba-ku, SendaiJapan
  2. 2.Department of EngineeringUniversity of CambridgeCambridgeUK

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