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Title: Visualization of dynamic fiber-matrix interfacial shear debonding

Abstract

To visualize the debonding event in real time for the study of dynamic crack initiation and propagation at the fiber–matrix interface, a modified tension Kolsky bar was integrated with a high-speed synchrotron X-ray phase-contrast imaging setup. In the gage section, the pull-out configuration was utilized to understand the behavior of interfacial debonding between SC-15 epoxy matrix and S-2 glass fiber, tungsten wire, steel wire, and carbon fiber composite Z-pin at pull-out velocities of 2.5 and 5.0 m s –1. The load history and images of the debonding progression were simultaneously recorded. Both S-2 glass fiber and Z-pin experienced catastrophic interfacial debonding whereas tungsten and steel wire experienced both catastrophic debonding and stick–slip behavior. Even though S-2 glass fiber and Z-pin samples exhibited a slight increase and tungsten and steel wire samples exhibited a slight decrease in average peak force and average interfacial shear stress as the pull-out velocities were increased, no statistical difference was found for most properties when the velocity was increased. Furthermore, the debonding behavior for each fiber material is similar with increasing pull-out velocity. Thus, the debonding mechanism, peak force, and interfacial shear stress were rate insensitive as the pull-out velocity doubled from 2.5 to 5.0 mmore » s –1. In conclusion, scanning electron microscope imaging of recovered epoxy beads revealed a snap-back behavior around the meniscus region of the bead for S-2 glass, tungsten, and steel fiber materials at 5.0 m s –1 whereas those at 2.5 m s –1 exhibited no snap-back behavior.« less

Authors:
ORCiD logo [1];  [1];  [2];  [3];  [2];  [2];  [1]
  1. Purdue Univ., West Lafayette, IN (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. U.S. Army Research Lab., Adelphi, MD (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
U.S. Army Research Laboratory, U.S. Army Research Office (ARO); USDOE
OSTI Identifier:
1460090
Grant/Contract Number:  
[AC02-06CH11357]
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Science
Additional Journal Information:
[ Journal Volume: 53; Journal Issue: 8]; Journal ID: ISSN 0022-2461
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Kolsky bar; high-speed synchrotron x-ray; interfacial shear stress; phase contrast imaging; pull-out technique

Citation Formats

Chu, Jou -Mei, Claus, Benjamin, Parab, Niranjan, O’Brien, Daniel, Sun, Tao, Fezzaa, Kamel, and Chen, Wayne. Visualization of dynamic fiber-matrix interfacial shear debonding. United States: N. p., 2017. Web. doi:10.1007/s10853-017-1759-1.
Chu, Jou -Mei, Claus, Benjamin, Parab, Niranjan, O’Brien, Daniel, Sun, Tao, Fezzaa, Kamel, & Chen, Wayne. Visualization of dynamic fiber-matrix interfacial shear debonding. United States. doi:10.1007/s10853-017-1759-1.
Chu, Jou -Mei, Claus, Benjamin, Parab, Niranjan, O’Brien, Daniel, Sun, Tao, Fezzaa, Kamel, and Chen, Wayne. Tue . "Visualization of dynamic fiber-matrix interfacial shear debonding". United States. doi:10.1007/s10853-017-1759-1. https://www.osti.gov/servlets/purl/1460090.
@article{osti_1460090,
title = {Visualization of dynamic fiber-matrix interfacial shear debonding},
author = {Chu, Jou -Mei and Claus, Benjamin and Parab, Niranjan and O’Brien, Daniel and Sun, Tao and Fezzaa, Kamel and Chen, Wayne},
abstractNote = {To visualize the debonding event in real time for the study of dynamic crack initiation and propagation at the fiber–matrix interface, a modified tension Kolsky bar was integrated with a high-speed synchrotron X-ray phase-contrast imaging setup. In the gage section, the pull-out configuration was utilized to understand the behavior of interfacial debonding between SC-15 epoxy matrix and S-2 glass fiber, tungsten wire, steel wire, and carbon fiber composite Z-pin at pull-out velocities of 2.5 and 5.0 m s–1. The load history and images of the debonding progression were simultaneously recorded. Both S-2 glass fiber and Z-pin experienced catastrophic interfacial debonding whereas tungsten and steel wire experienced both catastrophic debonding and stick–slip behavior. Even though S-2 glass fiber and Z-pin samples exhibited a slight increase and tungsten and steel wire samples exhibited a slight decrease in average peak force and average interfacial shear stress as the pull-out velocities were increased, no statistical difference was found for most properties when the velocity was increased. Furthermore, the debonding behavior for each fiber material is similar with increasing pull-out velocity. Thus, the debonding mechanism, peak force, and interfacial shear stress were rate insensitive as the pull-out velocity doubled from 2.5 to 5.0 m s–1. In conclusion, scanning electron microscope imaging of recovered epoxy beads revealed a snap-back behavior around the meniscus region of the bead for S-2 glass, tungsten, and steel fiber materials at 5.0 m s–1 whereas those at 2.5 m s–1 exhibited no snap-back behavior.},
doi = {10.1007/s10853-017-1759-1},
journal = {Journal of Materials Science},
number = [8],
volume = [53],
place = {United States},
year = {2017},
month = {10}
}

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