Self-Healing of Interfacial Debonding in Fiber-Reinforced Polymers and Effect of Microstructure on Strength Recovery
K. Sanada*, 1, N. Itaya1, y. Shindo2
Identifiers and Pagination:Year: 2008
First Page: 97
Last Page: 103
Publisher Id: TOMEJ-2-97
Article History:Received Date: 31/03/2008
Revision Received Date: 24/07/2008
Acceptance Date: 08/08/2008
Electronic publication date: 23/9/2008
Collection year: 2008
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
This study focuses on the optimizing the microstructure to improve the efficiency for healing interfacial debonding in fiber-reinforced polymers (FRPs). Healing is accomplished by incorporating a microcapsulated healing agent and catalytic chemical trigger within a coating layer on the surface of the fiber strands. Self-healing is demonstrated on flat tensile specimens of unidirectional FRPs. The effects of microcapsule diameter and concentration, and number of filaments in the fiber strand on tensile strength of virgin and healed specimens are discussed. Microstructure of the fracture surfaces of specimens was also examined by a scanning electron microscope. Additionally, finite element analyses were performed to predict the microcapsule-matrix debonding process during uniaxial tensile loading.