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An Experimental Study on the Mode I Fracture Behavior of Hexagonal Honeycombs

[+] Author Affiliations
Md Salah Uddin, Jaehyung Ju, Nandika D’Souza

University of North Texas, Denton, TX

Paper No. IMECE2013-64914, pp. V009T10A047; 13 pages
doi:10.1115/IMECE2013-64914
From:
  • ASME 2013 International Mechanical Engineering Congress and Exposition
  • Volume 9: Mechanics of Solids, Structures and Fluids
  • San Diego, California, USA, November 15–21, 2013
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5638-3
  • Copyright © 2013 by ASME

abstract

Cellular materials have a high strength-to-weight ratio, which is good for lightweight structural applications. In order to accelerate the commercial use of cellular materials in the structural applications, a well understanding of fracture behavior of cellular materials is required in terms of structural integrity. The objective of the study is to develop a predictive model on fracture behavior of orthotropic cellular polymers, prepared from an additive manufacturing method, under the mode-I macroscopic loading. The constituent material’s fracture properties are obtained from the three-point bending test of samples with a notched crack. Using the base material’s properties, a model on fracture toughness of hexagonal honeycombs with a varying cell angle is developed using a linear elastic fracture mechanics (LEFM) model of a cell wall material. Numerical and experimental tests will follow to validate the model.

Copyright © 2013 by ASME

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