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RESEARCH PAPERS

Evaluation of the Vanishing Fiber Diameter Model for Composite Plasticity

[+] Author and Article Information
F. J.-K. Hsu, E. P. Fahrenthold

Department of Mechanical Engineering, University of Texas, Austin, TX 78712

J. Eng. Mater. Technol 113(4), 465-474 (Oct 01, 1991) (10 pages) doi:10.1115/1.2904127 History: Received March 19, 1991; Online April 29, 2008

Abstract

The Vanishing Fiber Diameter (VFD) model for composite plasticity offers a computationally efficient approach to composite structural analysis and design problems. However this material model provides rather inaccurate predictions of composite deformation in a direction transverse to the fiber reinforcement. Empirical modification of the model is generally required to account for mesomechanical effects not present in the basic theory. Although systematic empirical modification of the VFD approach can provide accurate models of unidirectional composites, similarly accurate models of more complex laminates do not necessarily follow. The results suggest that laminate material models based on orthotropic lamina substructures do not in general provide a suitable basis for elastic-plastic structural design.

Copyright © 1991 by The American Society of Mechanical Engineers
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