Predictions of viscoelastic strain rate dependent behavior of fiber-reinforced polymeric composites

Title
Predictions of viscoelastic strain rate dependent behavior of fiber-reinforced polymeric composites
Authors
양범주김봉래이행기
Issue Date
2012-03
Publisher
Composite structures
Citation
VOL 94, NO 4-1429
Abstract
A viscoelastic damage model for aligned and 3D randomly oriented discontinuous fiber-reinforced polymeric composites is proposed. The model, which predicts the effective viscoelastic stress-strain behavior of the composites, is based on a combination of the Laplace-transformed superposition principle and the ensemble-averaged micromechanics. The Weibull's damage function is incorporated into the model for the modeling of the evolution of damaged fibers. An inverse analysis based on experimental data is adopted to simulate the strain rate sensitivity of the model. A series of numerical simulations based on the proposed model are performed to examine the influence of damage parameters, fiber orientations, strain rates, and the aspect ratio of discontinuous fibers on the behavior of the composites. In addition, experimental comparisons are made to illustrate and assess the predictive capability of the proposed model.
URI
http://pubs.kist.re.kr/handle/201004/65326
ISSN
0263-8223
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KIST Publication > Article
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