A Discontinuous Shell Element for the Delamination Analysis of Composite Laminates

authored by: Saleh Yazdani, Wilhelm J.H. Rust, Peter Wriggers
Abstract: Delamination analysis of laminated composite shells is studied. For this purpose, a four-noded flat shell element for linear and geometrically non-linear analyses is developed. The formulation is based on a first-order shear deformation theory (FSDT) and is valid for large displacements but moderate rotations. The extended finite element method (XFEM) is used to impose the discontinuous domain at an arbitrary through-the-thickness location. The progressive failure at the interface region is simulated through a mixed-mode cohesive zone model based on an exponential softening behavior. In addition, a simple non-frictional contact formulation is utilized to avoid the penetration of the discontinuous subdomains. To diminish the instability problem of the interface formulation, different integration rules are taken into account. Furthermore, the arc-length method with full Newton-Raphson iteration technique is applied to solve the non-linear governing equations. In order to verify the accuracy of the predictions, standard benchmark tests are carried out for analyzing shells, delamination, and the delamination buckling problems. The proposed model can be effectively used to model the delamination onset and its propagation in shell structures with less computational cost.
Organisation(s): Institute of Continuum Mechanics
External Organisation(s): University of Applied Sciences and Arts Hannover (HsH)
Type: Conference contribution
Publication date: 2016
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Architecture, Mechanics of Materials
Electronic version(s): https://doi.org/10.2514/6.2016-1971 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{a02b3df9487f44e79f271ea41d581ed3,
title = "A Discontinuous Shell Element for the Delamination Analysis of Composite Laminates",
abstract = "Delamination analysis of laminated composite shells is studied. For this purpose, a four-noded flat shell element for linear and geometrically non-linear analyses is developed. The formulation is based on a first-order shear deformation theory (FSDT) and is valid for large displacements but moderate rotations. The extended finite element method (XFEM) is used to impose the discontinuous domain at an arbitrary through-the-thickness location. The progressive failure at the interface region is simulated through a mixed-mode cohesive zone model based on an exponential softening behavior. In addition, a simple non-frictional contact formulation is utilized to avoid the penetration of the discontinuous subdomains. To diminish the instability problem of the interface formulation, different integration rules are taken into account. Furthermore, the arc-length method with full Newton-Raphson iteration technique is applied to solve the non-linear governing equations. In order to verify the accuracy of the predictions, standard benchmark tests are carried out for analyzing shells, delamination, and the delamination buckling problems. The proposed model can be effectively used to model the delamination onset and its propagation in shell structures with less computational cost.",
author = "Saleh Yazdani and Rust, {Wilhelm J.H.} and Peter Wriggers",
note = "Funding information: The present work was supported by the Government of Lower Saxony of Germany under the framework of the project MARIO (Multifunctional Active and Reactive Interfaces and Surfaces). The authors gratefully acknowledge this support.; 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016 ; Conference date: 04-01-2016 Through 08-01-2016",
year = "2016",
doi = "10.2514/6.2016-1971",
language = "English",
isbn = "9781624103926",
booktitle = "57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference",
publisher = "American Institute of Aeronautics and Astronautics Inc. (AIAA)",
address = "United States",
}