Using Virtual Tests to Complete the Description of a Three-Dimensional Orthotropic Material
Publication: Journal of Aerospace Engineering
Volume 30, Issue 5
Abstract
Generalized constitutive models, which can be used in explicit finite-element analysis, are being developed to accurately model composite systems under impact conditions. These models require extensive characterization of the composite material as input—the more sophisticated the model, the larger the amount of required input data. The authors discuss details of the characterization data required for a generalized three-dimensional orthotropic elastoplastic material model that is under development to simulate the impact response of composite materials. The material response data are generated using virtual testing methods in an analytical approach based on the generalized method of cells and a finite-element system. These methods not only complement actual test data by providing an additional layer of verification for experimentally generated stress-strain curves; they also fill in gaps caused by lack of appropriate experimental data (due either to the required experiments not being carried out or to the experiments being too complex to carry out). Verification and validation test cases demonstrate the capabilities of the developed system and show how a general virtual testing framework can be used for characterizing orthotropic composites.
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Acknowledgments
Authors Harrington, Hoffarth, and Rajan gratefully acknowledge the support of (1) the Federal Aviation Administration through Grant #12-G-001 titled “Composite Material Model for Impact Analysis,” William Emmerling, Technical Monitor, and (2) NASA through Contract Number NN15CA32C titled “Development and Implementation of an Orthotropic Plasticity Progressive Damage Model for Transient Dynamic/Impact Finite Element Analysis of Composite Structures, Robert Goldberg, Contracting Officer Representative.
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Published In
Journal of Aerospace Engineering
Volume 30 • Issue 5 • September 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 23, 2016
Accepted: Jan 12, 2017
Published online: Mar 28, 2017
Discussion open until: Aug 28, 2017
Published in print: Sep 1, 2017
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