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Single and Multisite Impact Response of S2-Glass/Epoxy Balsa Wood Core Sandwich Composites

  • Uday K. VaidyaEmail author
  • Lakshya J. Deka

Abstract

Impact damage reduces the structural integrity and load bearing capacity of a composite structure. Most studies on high velocity impact damage have been limited to single-site impacts, with little consideration given to the effect of cumulative damage from multiple impacts. In this study, the impact damage response of S2-glass/epoxy balsa wood core sandwich composite is evaluated experimentally and supported by finite element modeling for single-site and multi-site impacts from 0.30 and 0.50 caliber spherical projectiles. During high velocity impact, a composite laminate undergoes progressive damage;hence a progressive failure model based on Hashin's criteria is used to predict failure. When subjected to multi-site impact loading, a sandwich composite structure exhibits synergistic and cumulative damage causing extensive fiber breakage, matrix cracking and delamination. An excellent correlation between experimental and numerical results is obtained.

Keywords

Sandwich Plate Fiber Breakage Sandwich Composite Balsa Core Delamination Growth 
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.

Notes

Acknowledgment

The support provided by Office of Naval Research (ONR), Program Manager —Dr. Yapa Rajapakse is gratefully acknowledged. We also acknowledge Dr. Frederick Just-Agosto and Dr. Basir Shafiq from the University of Puerto Rico, Mayaguez.

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.University of Alabama at BirminghamAlabamaUSA

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