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A Revisit to High-rate Mode-II Fracture Characterization of Composites with Kolsky Bar Techniques

  • Wei-Yang Lu
  • Bo Song
  • Helena Jin
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

Nowadays composite materials have been extensively utilized in many military and industrial applications. For example, the newest Boeing 787 uses 50% composite (mostly carbon fiber reinforced plastic) in production. However, the weak delamination strength of fiber reinforced composites, when subjected to external impact such as ballistic impact, has been always potential serious threats to the safety of passengers. Dynamic fracture toughness is a critical indicator of the performance from delamination in such impact events. Quasi-static experimental techniques for fracture toughness have been well developed. For example, end notched flexure (ENF) technique, which is illustrated in Fig. 1, has become a typical method to determined mode-II fracture toughness for composites under quasi-static loading conditions. However, dynamic fracture characterization of composites has been challenging. This has resulted in conflictive and confusing conclusions in regard to strain rate effects on fracture toughness of composites [1].

Keywords

Fracture Toughness Digital Image Correlation Dynamic Fracture Toughness Stress Wave Propagation Fiber Reinforce Epoxy Composite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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ReferenceS

  1. 1.
    Jacob, G. C., Starbuck, J. M., Fellers, J. F., Simunovic, S., Boeman, R. G., 2005, “The effect of loading rate on the fracture toughness of fiber reinforced polymer composites,” Journal of Applied Polymer Science, 96:899-904.CrossRefGoogle Scholar
  2. 2.
    Yang, Z., and Sun, C. T., 2000, “Interlaminar fracture toughness of a graphite/epoxy multidirectional composite,” Transactions of the ASME, Journal of Engineering Materials and Technology, 22:428-433.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Wei-Yang Lu
    • 1
  • Bo Song
    • 1
  • Helena Jin
    • 1
  1. 1.Sandia National LaboratoriesLivermoreUSA

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