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Numerical aspects of delamination modeling using interface elements: 8th International Conference on Composite Science and Technology, ICCST8

Numerical aspects of delamination modeling using interface elements: 8th International Conference on Composite Science and Technology, ICCST8
Numerical aspects of delamination modeling using interface elements: 8th International Conference on Composite Science and Technology, ICCST8
In spite of a vast background on cohesive constitutive law and its use for various analyses such as delamination in composite laminates, some numerical aspects of that have been less explored and reported in the literature. The aim of this paper is to study the phenomenon of spurious stress oscillation and also dominant process zone (where damage has its most significant evolution) in delamination modeling. For this purpose, distribution of normal stress and damage parameter of different DCB specimen are analyzed. Distribution of stress around the process zone indicates spurious oscillation just ahead of the delamination tip where damage parameter is zero and no effect of this phenomenon is seen on results of applied load versus opening displacement. Additionally, it is shown that larger values of penalty stiffness lead in smaller length of dominant process zone and very large values of penalty stiffness pushes the distribution of damage parameter to become step-like function. Authors believe that this effect is in fact the main reason of un-converged solution of models with too large penalty values.
delamination, dominant process zone, interface element, spurious stress oscillation
Trans Tech
Hosseini-Toudeshky, Hossein
772af740-2748-4c22-8aa3-69868fb29673
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Ghayour, Mohammad Hossein
bb2fc0bf-f385-4f86-9d04-f15731f4dbc8
Hosseini-Toudeshky, Hossein
772af740-2748-4c22-8aa3-69868fb29673
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Ghayour, Mohammad Hossein
bb2fc0bf-f385-4f86-9d04-f15731f4dbc8

Hosseini-Toudeshky, Hossein, Jalalvand, Meisam and Ghayour, Mohammad Hossein (2011) Numerical aspects of delamination modeling using interface elements: 8th International Conference on Composite Science and Technology, ICCST8. (doi:10.4028/www.scientific.net/KEM.471-472.606).

Record type: Other

Abstract

In spite of a vast background on cohesive constitutive law and its use for various analyses such as delamination in composite laminates, some numerical aspects of that have been less explored and reported in the literature. The aim of this paper is to study the phenomenon of spurious stress oscillation and also dominant process zone (where damage has its most significant evolution) in delamination modeling. For this purpose, distribution of normal stress and damage parameter of different DCB specimen are analyzed. Distribution of stress around the process zone indicates spurious oscillation just ahead of the delamination tip where damage parameter is zero and no effect of this phenomenon is seen on results of applied load versus opening displacement. Additionally, it is shown that larger values of penalty stiffness lead in smaller length of dominant process zone and very large values of penalty stiffness pushes the distribution of damage parameter to become step-like function. Authors believe that this effect is in fact the main reason of un-converged solution of models with too large penalty values.

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More information

Published date: 28 February 2011
Keywords: delamination, dominant process zone, interface element, spurious stress oscillation

Identifiers

Local EPrints ID: 446537
URI: http://eprints.soton.ac.uk/id/eprint/446537
PURE UUID: 459546de-fd04-4a26-94bb-dd31971015eb
ORCID for Meisam Jalalvand: ORCID iD orcid.org/0000-0003-4691-6252

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Date deposited: 12 Feb 2021 17:32
Last modified: 18 Feb 2021 17:42

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Contributors

Author: Hossein Hosseini-Toudeshky
Author: Mohammad Hossein Ghayour

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