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Journal of Sandwich Structures and Materials
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Perforation of Sandwich Panels with Honeycomb Cores by Hemispherical Nose Projectiles

Chunfu Lin

Department of Mechanical Engineering, The University of Akron, Akron, OH 44325-3903, USA

Michelle S. Hoo Fatt

Department of Mechanical Engineering, The University of Akron, Akron, OH 44325-3903, USAhoofatt{at}uakron.edu

Analytical models for the static and low-velocity perforation of composite sandwich panel with woven E-glass/epoxy prepreg facesheets and aluminum honeycomb core are developed. The analytical models are based on a set of experimental results. A three-stage perforation process involving consecutive failures of top facesheet, core, and bottom facesheet is proposed. The analytical predictions of static failure loads and deformation are within 10 and 8% of the test data, respectively. The predicted ballistic limit is within 10% of the test data, while the total energy dissipated at the ballistic limit is within 18% of the test results.

Key Words: composite sandwich • static indentation • projectile impact • perforation • equivalent mass-spring models

Journal of Sandwich Structures and Materials, Vol. 7, No. 2, 133-172 (2005)
DOI: 10.1177/1099636205048369
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C. Lin and M. S. H. Fatt
Perforation of Composite Plates and Sandwich Panels under Quasi-static and Projectile Loading
Journal of Composite Materials, October 1, 2006; 40(20): 1801 - 1840.
[Abstract] [PDF]