Review Articles

Review of Degradation Models for Progressive Failure Analysis of Fiber Reinforced Polymer Composites

[+] Author and Article Information
Mark R. Garnich

Department of Mechanical Engineering, University of Wyoming, 1000 E. University Avenue, Laramie, WY 82071garnich@uwyo.edu

Venkata M. K. Akula

Department of Mechanical Engineering, University of Wyoming, 1000 E. University Avenue, Laramie, WY 82071

Appl. Mech. Rev 62(1), 010801 (Dec 16, 2008) (33 pages) doi:10.1115/1.3013822 History: Received November 16, 2007; Revised August 11, 2008; Published December 16, 2008

The success of any progressive failure analysis of composite structures is influenced by the failure criteria and the associated material property degradation models. The failure criteria are the conditions for the prediction of the occurrence of material damage. The degradation models are mathematical representations of the residual properties for each material damage state predicted by the failure criteria. A brief summary of the major classes of failure criteria pertaining to the degradation models is followed by a review of degradation models that have been developed for unidirectional polymer matrix composite laminates. The review is organized around the relationships of the various models to associated failure criteria as well as the various constitutive frameworks for finite element implementation. Models that invoke residual properties as a one-time sudden degradation of the original properties are described followed by models where the mathematical representation of at least one property invokes gradual property degradation as a function of some other evolving field variable.

Copyright © 2009 by American Society of Mechanical Engineers
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Figure 1

(a) On-axis or material coordinate system for a lamina. (b) Off-axis or laminate coordinate system for a lamina.

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Figure 2

(a) Front view of a six-layer laminate modeled with a layered-solid element containing one integration point per layer. (b) Front view of a four-layer laminate modeled with the layerwise formulation.

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Figure 3

Schematic of basic property degradation models

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Figure 4

The effect of β in the Chang degradation model

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Figure 5

Petit and Waddoups model (212)

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Figure 6

Elastic–perfectly plastic model

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Figure 7

Nahas (215) unloading model

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Figure 8

(a) Damaged configuration. (b) Effective continuum for damaged configuration.



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