Modelling Delamination in an Equivalent Single Layer Model in Explicit Finite Element Analysis

Master thesis (2017)

Authors

J. Koeman Aerospace Engineering

Contributors

C. Kassapoglou (mentor)
C. Bisagni (graduation committee member)
D. Zarouchas (graduation committee member)
Faculty
Aerospace Engineering, Aerospace Engineering
Copyright: © 2017 Jurrien Koeman
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Published Date

19-12-2017

Language

English

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Faculty

Aerospace Engineering

Abstract

Delamination is one of the failure modes of composites prone to happen in the case of a car crash. In the early stages of car design, finite element analysis is used as a tool to analyze structural concepts. In order to model delamination in a newly developed material model, it is analyzed in two parts: detection and effects of delamination. To detect delamination in an equivalent single layer model in explicit finite element analysis, the transverse shear stresses are recovered from the solution of a time step, followed by the application of a stress-based delamination failure criterion. The second part results in the following: to model the effects of delamination in the same framework, each effect has to be treated separately, leading to the use of a delamination damage factor to reduce the bending stiffness and stresses due to delamination.

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