Microscale investigation of transverse tensile failure of fiber-reinforced polymer composites

Caitlin M. Arndt, Paige DaBell, Michael W Czabaj

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

In this study, two experimental approaches are used to understand fracture mechanisms that govern transverse tensile failure of fiber-reinforced polymer composites at the microscale. These observations are used to directly measure, and indirectly estimate, the magnitude and scatter of the transverse tensile strength, YT, and the associated effective flaw size, a0. To this end, static three-point bend tests are performed on pristine and notched 90° unidirectional IM7/8552 carbon-epoxy samples. In the pristine specimen study, tensile microcracks are observed to initiate well before the ultimate failure load used to compute YT is reached. In the notched specimen study, a comparison is made between experimentally measured strengths with known notch lengths and a linear elastic fracture mechanics solution. The fracture mechanics solution significantly over-predicts the apparent YT for notch lengths less than a ply thickness, suggesting that this approach may not be appropriate for estimation of transverse tensile strength at the microscale. The observations made in this study suggest that YT may not be a true material property, but rather, a structural property dependent on specimen geometry and microstructural variability.

LanguageEnglish (US)
Title of host publicationConference Proceedings of the Society for Experimental Mechanics Series
PublisherSpringer New York LLC
Pages209-212
Number of pages4
DOIs
StatePublished - Jan 1 2019

Fingerprint

Fiber reinforced plastics
Reinforced plastics
Beams and girders
Microcracks
Fracture mechanics
Optical microscopy
Reinforcement
Tensile strength
Microstructure
Fibers
Composite materials
Polymers
Structural properties
Materials properties
Mechanics
Defects
Carbon
Geometry

Keywords

  • Linear elastic fracture mechanics
  • Matrix cracking
  • Microstructure
  • Optical microscopy
  • Transverse tensile strength

ASJC Scopus subject areas

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

Cite this

Arndt, C. M., DaBell, P., & Czabaj, M. W. (2019). Microscale investigation of transverse tensile failure of fiber-reinforced polymer composites. In Conference Proceedings of the Society for Experimental Mechanics Series (pp. 209-212). Springer New York LLC. https://doi.org/10.1007/978-3-319-95510-0_25

Microscale investigation of transverse tensile failure of fiber-reinforced polymer composites. / Arndt, Caitlin M.; DaBell, Paige; Czabaj, Michael W.

Conference Proceedings of the Society for Experimental Mechanics Series. Springer New York LLC, 2019. p. 209-212.

Research output: Chapter in Book/Report/Conference proceedingChapter

Arndt, CM, DaBell, P & Czabaj, MW 2019, Microscale investigation of transverse tensile failure of fiber-reinforced polymer composites. in Conference Proceedings of the Society for Experimental Mechanics Series. Springer New York LLC, pp. 209-212. https://doi.org/10.1007/978-3-319-95510-0_25
Arndt CM, DaBell P, Czabaj MW. Microscale investigation of transverse tensile failure of fiber-reinforced polymer composites. In Conference Proceedings of the Society for Experimental Mechanics Series. Springer New York LLC. 2019. p. 209-212 https://doi.org/10.1007/978-3-319-95510-0_25
Arndt, Caitlin M. ; DaBell, Paige ; Czabaj, Michael W. / Microscale investigation of transverse tensile failure of fiber-reinforced polymer composites. Conference Proceedings of the Society for Experimental Mechanics Series. Springer New York LLC, 2019. pp. 209-212
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