Effect of Fiber Properties on Non-Linearity in 2x2 Biaxial Braided Composites
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Plasticity induced non-linear behavior of 22 braided composites was analyzed using a two scale modeling approach based on Hill's yield function for orthotropic materials. The effect of Fiber type on the degree of plasticity induced non-linearity was characterized in terms of various behaviors, such macroscopic stress-strain behavior, stress distributions, and plastic zone locations and sizes. Conclusions about the effect of Fiber type on the degree of plasticity induced non-linearity depend on the parameters used to quantify the plasticity. The preliminary results suggest that a glass braid tow is more susceptible to initiation of fatigue damage than a carbon braid tow of a geometrically similar braid. Copyright 2006 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.