Experimental-Computational Characterization of Fiber-to-Fiber Interactions in Glass Macro Fiber Composites

Hugo Girard, Zaynab Hazaveh, Behrad Koohbor, Aurélien Doitrand

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Effects of inter-fiber distance and angular orientation on the fiber-matrix interface debonding are investigated using a hybrid experimental-computational approach. Model composite samples are fabricated using two glass macro fibers embedded in a clear epoxy resin and then subjected to remote tensile loads. The distance and angular position between the two fibers in the epoxy are varied systematically to cover a wide range of inter-fiber distances and orientations. Specifically, the model composites are designed to include fiber-to-fiber angles ranging from 0° to 90° in 15° increments. Displacement and strain fields developed in the vicinity of the fiber-matrix interface are measured by high-magnification digital image correlation (DIC). The initiation and propagation of debonding at the fiber-matrix interface are characterized as a function of far-field stress, inter-fiber distance and angle. A finite element simulation framework is established and calibrated by the experimental measurements first. Correlations between local and global stress-strain fields are then identified from the experimental measurements supplemented by finite element simulations. Results obtained herein indicate that the spacing and angular orientation between adjacent fibers affect the interface debonding initiation and propagation. However, the inter-fiber distance has a more consequential effect on the debonding process, i.e., the smaller the distance the larger the fields intensity. The results obtained from the hybrid approach here are further analyzed to identify the sources of uncertainty quantification. The hybrid approach proposed and discussed in this work provides a systematic methodology for the quantitative analysis of fiber-matrix interface debonding mechanisms leading to transverse cracking in unidirectional composites.

Original languageEnglish (US)
Title of host publicationProceedings of the American Society for Composites - 38th Technical Conference, ASC 2023
EditorsMarianna Maiaru, Gregory Odegard, Brett Bednarcyk, Evan Pineda
PublisherDEStech Publications
Pages43-50
Number of pages8
ISBN (Electronic)9781605956916
StatePublished - 2023
Externally publishedYes
Event38th Technical Conference of the American Society for Composites, ASC 2023 - Boston, United States
Duration: Sep 18 2023Sep 20 2023

Publication series

NameProceedings of the American Society for Composites - 38th Technical Conference, ASC 2023

Conference

Conference38th Technical Conference of the American Society for Composites, ASC 2023
Country/TerritoryUnited States
CityBoston
Period9/18/239/20/23

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films

Fingerprint

Dive into the research topics of 'Experimental-Computational Characterization of Fiber-to-Fiber Interactions in Glass Macro Fiber Composites'. Together they form a unique fingerprint.

Cite this