High Strain Rate Mechanical Characterization of Carbon Fiber Reinforced Polymer Composites using Digital Image Correlations

Paper #:
  • 2017-01-0230

Published:
  • 2017-03-28
Abstract:
If carbon fiber reinforced polymers (CFRP) are to be used as structural components in lightweight automotive bodies, a robust understanding of how these materials absorb and dissipate energy during crash events must be developed. CFRPs are characterized by highly variable modulii and strengths and low ductilities, and thus mechanical measurements can be difficult. In this presentation we will detail novel experiments and equipment developed at NCAL for characterizing the interlaminar Mode I and II fracture energy release rates, the fracture stresses normal to the interfaces, and the high rate stress-strain behavior of unidirectional and woven composites. Digital image correlation (DIC) was used with unique test geometries to observe the micromechanisms of failure in these configurations, and these results will be discussed in light of numerical simulations of CFRP materials in crash conditions.
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