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2020, Volume 14, Issue 2

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Frontiers of Structural and Civil Engineering >> 2020, Volume 14, Issue 2 doi: 10.1007/s11709-019-0567-x

Isogeometric cohesive zone model for thin shell delamination analysis based on Kirchhoff-Love shell model

. Institute of Continuum Mechanics, Leibniz University of Hannover, Hannover 30167, Germany.. Division of Computational Mechanics, Ton Duc Thang University, Ho Chi Minh City, Vietnam.. Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

Accepted: 2020-03-06 Available online: 2020-03-06
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Abstract

We present a cohesive zone model for delamination in thin shells and composite structures. The isogeometric (IGA) thin shell model is based on Kirchhoff-Love theory. Non-Uniform Rational B-Splines (NURBS) are used to discretize the exact mid-surface of the shell geometry exploiting their C -continuity property which avoids rotational degrees of freedom. The fracture process zone is modeled by interface elements with a cohesive law. Two numerical examples are presented to test and validate the proposed formulation in predicting the delamination behavior of composite structures.

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