A new method of evaluating interfacial properties of a fiber/matrix composite
Budiman B.A.a,b, Takahashi K.a, Inaba K.a, Kishimoto K.a
a Department of Mechanical Sciences and Engineering, Tokyo Institute of Technology, Japan
b Department of Mechanical Engineering, Bandung Institute of Technology, Indonesia
Abstract
© The Author(s) 2014.Interfacial debonding frequently initiates composite failure in a fiber/matrix composite. A single-fiber fragmentation test and its modifications can be used to evaluate interfacial properties. However, they still have accuracy problems due to fiber impurities and friction work. This paper presents a new method of evaluating interfacial properties using a stress contour of composite matrix. A single-fiber fragmentation test model was developed to simulate the stress contour. The interface was modeled as a cohesive zone model. Four characteristic lengths on the stress contour were found after conducting simulations with many interfacial properties values. The stress contour was then captured from the single-fiber fragmentation test employing a photo-elasticity technique and the four characteristic lengths were measured. Iteration in simulation involved changing interfacial properties until corresponding characteristic lengths from experiment and simulation were obtained. The results were compared with those obtained with existing methods and found to be reasonable.
Author keywords
Characteristic length,Cohesive zone model,Composite matrices,Interfacial debonding,Interfacial property,Single fiber,Single fiber fragmentation test,Stress contours
Indexed keywords
interfacial properties,single-fiber fragmentation,Stress contour
Funding details
Financial support for this study was provided by a grant from Mizuho Foundation for the Promotion of Sciences.