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3D Modelling of Impact Failure in Sandwich Structures

Yu, C. and Ortiz, M. and Rosakis, A. J. (2003) 3D Modelling of Impact Failure in Sandwich Structures. European Structural Integrity Society, 32 . pp. 527-537. ISSN 1566-1369. doi:10.1016/S1566-1369(03)80122-X.

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Cohesive theories of fracture are applied to simulate the complex failure modes in sandwich structures subjected to low-speed impact. The particular configuration contemplated in this study refers to the experiments performed by Xu and Rosakis [1], where the model specimens involving a compliant polymer core sandwiched between two metal layers, were adopted to simulate failure evolution mechanisms in real sandwich structures. Fracture has been modeled by recourse to an irreversible cohesive law embedded into three-dimensional cohesive elements. These cohesive elements govern all aspects of the separation of the incipient cracks. The cohesive behavior of the material is assumed to be rate independent and, consequently, all rate effects predicted by the calculations are due to inertia. The fidelity of the model has been validated by several previous simulations [2,3]. The numerical simulations have proved highly predictive of a number of observed features, including: the complex sequences of the failure mode, shear-dominated inter-sonic (a speed that is greater than shear wave speed but less than the longitudinal wave speed of the material) inter-layer cracks, the transition from inter-layer crack growth to intra-layer crack formation and the core branching later on.

Item Type:Article
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URLURL TypeDescription
Yu, C.0000-0003-4176-0324
Ortiz, M.0000-0001-5877-4824
Rosakis, A. J.0000-0003-0559-0794
Additional Information:© 2003 Elsevier Ltd and ESIS. CY thanks Ministerio de Educacion, Cultura y Deporte, Spain, for the fellowship SB2000-0191, which makes possible her stay at ETSI de Caminos, C., y P., Universidad de Castilla-La Mancha (UCLM). She also acknowledges the financial support from the Vicerrectorado de Investigacion of UCLM. CY and MO are grateful for DOE support provided through Caltech's ASCII ASAP Center for the Simulation of the Dynamic Response of Solids. AJR acknowledge the support of the Office of Naval Research through grant N00014-9 to Caltech and the support of the National Science Foundation grant CMS9813100.
Funding AgencyGrant Number
Ministerio de Educación, Cultura y Deporte (MECD)SB2000-0191
Department of Energy (DOE)UNSPECIFIED
Subject Keywords:Impact failure; sandwich structures; intra-layer crack; inter-layer crack; finite elements and cohesive elements
Record Number:CaltechAUTHORS:20171129-164945762
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Official Citation:C. Yu, M. Ortiz, A.J. Rosakis, 3D Modelling of Impact Failure in Sandwich Structures, Editor(s): B.R.K. Blackman, A. Pavan, J.G. Williams, In European Structural Integrity Society, Elsevier, Volume 32, 2003, Pages 527-537, ISSN 1566-1369, ISBN 9780080441955, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83582
Deposited By: Lydia Suarez
Deposited On:30 Nov 2017 17:10
Last Modified:15 Nov 2021 20:12

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