Peridynamic Analysis of Impact Damage in Composite Laminates |
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Authors: | Jifeng Xu Abe Askari Olaf Weckner Stewart Silling |
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Affiliation: | 1Computational Scientist, Phantom Works, The Boeing Company, Bellevue, WA 98008 (corresponding author). E-mail: jifeng.xu@boeing.com 2Associate Technical Fellow, Phantom Works, The Boeing Company, Bellevue, WA 98008. E-mail: abe.askari@boeing.com 3Research Engineer, Phantom Works, The Boeing Company, Bellevue, WA 98008. E-mail: olaf.weckner@boeing.com 4Distinguished Member of Technical Staff, Sandia National Laboratories, Albuquerque, NM 87185. E-mail: sasilli@sandia.gov
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Abstract: | The traditional methods for analyzing deformation in structures attempt to solve the partial differential equations of the classical theory of continuum mechanics. Yet these equations, because they require the partial derivatives of displacement to be known throughout the region modeled, are in some ways unsuitable for the modeling of discontinuities caused by damage, in which these derivatives fail to exist. As a means of avoiding this limitation, the peridynamic model of solid mechanics has been developed for applications involving discontinuities. The objective of this method is to treat crack and fracture as just another type of deformation, rather than as pathology that requires special mathematical treatment. The peridynamic theory is based on integral equations so there is no problem in applying the equations across discontinuities. The peridynamic method has been applied successfully to damage and failure analysis in composites. It predicts in detail the delamination and matrix damage process in composite laminates due to low velocity impact, and the simulation results of damage area correlates very well with the experimental data. |
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Keywords: | Composite materials Laminates Constitutive models Impact loads Damage |
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