Interfacial debonding and fibre pull-out stresses |
| |
Authors: | Li-Min Zhou Yiu-Wing Mai Caroline Baillie |
| |
Affiliation: | (1) Centre for Advanced Materials Technology, Department of Mechanical and Mechatronic Engineering, University of Sydney, 2006 Sydney, NSW, Australia |
| |
Abstract: | Based on a theoretical model developed previously by the authors in Part II of this series for a single fibre pull-out test, a methodology for the evaluation of interfacial properties of fibre-matrix composites is presented to determine the interfacial fracture toughness G
c, the friction coefficient , the radial residual clamping stress q
o and the critical bonded fibre length z
max. An important parameter, the stress drop ![Delta](/content/j620g57535x26114/xxlarge916.gif) , which is defined as the difference between the maximum debond stress
d
*
and the initial frictional pull-out stress fr, is introduced to characterize the interfacial debonding and fibre pull-out behaviour. The maximum logarithmic stress drop, In(![Delta](/content/j620g57535x26114/xxlarge916.gif) ), is obtained when the embedded fibre length L is equal to the critical bonded fibre length z
max. The slope of the In(![Delta](/content/j620g57535x26114/xxlarge916.gif) )-L curve for L bigger than z
max is found to be a constant that is related to the interfacial friction coefficient . The effect of fibre anisotropy on fibre debonding and fibre pull-out is also included in this analysis. Published experimental data for several fibre-matrix composites are chosen to evaluate their interfacial properties by using the present methodology.On leave at the Department of Mechanical Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|