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Visualization of dynamic fiber-matrix interfacial shear debonding

Journal Article · · Journal of Materials Science
 [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)

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.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
U.S. Army Research Laboratory, U.S. Army Research Office (ARO); USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1460090
Alternate ID(s):
OSTI ID: 22754691
Journal Information:
Journal of Materials Science, Journal Name: Journal of Materials Science Journal Issue: 8 Vol. 53; ISSN 0022-2461
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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  • Parab, Niranjan D.; Guo, Zherui; Hudspeth, Matthew
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 375, Issue 2085 https://doi.org/10.1098/rsta.2016.0178
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Cited By (3)

Understanding mechanical behavior of interfaces in materials journal January 2018
In-Situ Visualization of Tensile Failure in Additively Manufactured 316 L Stainless Steel journal July 2019
Rate effects on fiber–matrix interfacial transverse debonding behavior journal October 2019

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