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Journal of Materials Science

, Volume 43, Issue 15, pp 5168–5184 | Cite as

Energy absorption and damage propagation in 2D triaxially braided carbon fiber composites: effects of in situ matrix properties

  • Amit G. Salvi
  • Anthony M. WaasEmail author
  • Ari Caliskan
Article

Abstract

Results from an experimental program to investigate the propagation of damage and energy dissipation in 2D triaxially braided carbon fiber textile composites (2DTBC) under static conditions are reported. A methodology is presented in which classical concepts from fracture mechanics are generalized to address damage growth in an orthotropic and heterogeneous structural material. Along with results from the experimental program, a novel numerical technique that employs ideas from cohesive zone modeling, and implemented through the use of finite-element analysis, is also presented. The inputs that are required for the discrete cohesive zone model (DCZM) are identified. Compact tension specimen fracture tests and double notched tension tests were carried out to measure the fracture energy (GIc), and the maximum cohesive strength (σc), of the 2DTBC. The DCZM modeling strategy was independently verified by conducting single edge notched three-point bend tests using a modified three-point bend test fixture. The experimental and numerical analyses were carried out for two different types of 2DTBC made from the same textile architecture but infused with two different resin systems to validate the proposed methodology.

Keywords

Fracture Energy Linear Elastic Fracture Mechanic Cohesive Zone Cohesive Strength Compact Tension Specimen 

Notes

Acknowledgements

The authors are grateful for the financial sponsorship of the Automotive Composites Consortium, Energy Management Working Group, and the Department of Aerospace Engineering, University of Michigan. The authors acknowledge that this research was supported, in whole or in part, by Department of Energy cooperative agreement no. DE-FC05-95OR22363. Such support does not constitute an endorsement by the Department of Energy of the views expressed herein.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Amit G. Salvi
    • 1
  • Anthony M. Waas
    • 1
    Email author
  • Ari Caliskan
    • 2
  1. 1.Department of Aerospace EngineeringUniversity of MichiganAnn ArborUSA
  2. 2.Vehicle Design and R&A DepartmentFord Motor CompanyDearbornUSA

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