Advertisement

Dynamic Mode II Fracture Response of PMMA Within an Aquatic Environment

  • Vivianna Gomez
  • Ian DelaneyEmail author
  • Rodrigo Chavez
  • Veronica Eliasson
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

Sheets of Poly Methyl Methacrylate (PMMA) 3 mm thick are lasercut into rectangles, and then subjected to a high-energy impact while submerged in distilled water, to investigate the effect that submersion may have on mode II fracture. The experiment has been carried out using a compressed air gun, which launches a delrin projectile towards the PMMA test specimen. A unique apparatus was constructed, which contains and allows the test specimen to be suspended in distilled water, while the projectile impacts a buffer adhered to the test specimen. The buffer transfers the impact onto the edge of the test specimen. Transparent walls in the apparatus allow the use of ultra-high-speed photography (up to 10Mfps), and digital image correlation (DIC) to measure dynamic response within the specimen throughout fracture. Data collected was used to calculate critical stress intensity factor. Results are compared to those from experiments in which test samples are not submerged.

Keywords

Fracture Mechanics Mode 2 Fracture Submerged Fracture Polymeric Materials Dynamic Loading Extreme Environment Boundary Conditions Water Aquatic Environment DIC Digital Image Correlation CSIF Critical Stress Intensity Factor PMMA Polymers 

References

  1. 1.
    Freud, L.B.: The Mechanics of Dynamic Fracture, pp. 1–15. Brown University, Providence (1986)Google Scholar
  2. 2.
    Anderson, T.L.: Linear elastic fracture mechanics. In: Fracture Mechanics: Fundamentals and Applications, 4th edn, pp. 25–26. CRC press, New York (2017)CrossRefGoogle Scholar
  3. 3.
    Mach, K.J., Nelson, D.V., Denny, M.W.: Techniques for predicting the lifetimes of wave-swept macroalgae: a primer on fracture mechanics and crack growth. J. Exp. Biol. 210(13), 2213–2230 (2007)CrossRefGoogle Scholar
  4. 4.
    Delpino, O.: On the dynamic fracture behavior of polymeric materials subjected to extreme conditions, PhD. Thesis, University of Southern California, (2016)Google Scholar
  5. 5.
    Broberg, K.B.: Differences between mode I and mode II crack propagation. Pure Appl. Geophys. 163, 1867 (2006)CrossRefGoogle Scholar
  6. 6.
    Kalthoff, J.F.: On the Measurement of Dynamic Fracture Toughnesses–A Review of Recent Work. Dynamic Fracture, pp. 151–172. Springer, Dordrecht (1985)Google Scholar

Copyright information

© The Society for Experimental Mechanics, Inc. 2019

Authors and Affiliations

  • Vivianna Gomez
    • 1
  • Ian Delaney
    • 1
    Email author
  • Rodrigo Chavez
    • 1
  • Veronica Eliasson
    • 1
  1. 1.University of California: San Diego, Department of Structural EngineeringSan DiegoUSA

Personalised recommendations