Higher order adaptively integrated cohesive element

Raffaele Russo, Boyang Chen

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

Cohesive Element (CE) is a well-established finite element for fracture, widely used for the modelling of delamination in composites. However, the computational time of CE-based method is prohibitive. This is because the steep and non-smooth stress gradient in the cohesive zone requires a very fine mesh. In this context, a new type of CE is here proposed, aiming to loosen the mesh constraint and reduce the computational time. It uses a higher-order interpolation of the displacement field with rotational degree of freedom and an adaptive integration scheme based on the status of the element. The proposed CE has been validated through comparison with benchmark solutions of delamination in Mode I, Mode II and Mixed-Mode cases, and has demonstrated superior performance than standard CE in computational efficiency while retaining a high level of accuracy.

Original languageEnglish
Title of host publicationECCM 2018 - 18th European Conference on Composite Materials
PublisherApplied Mechanics Laboratory
Number of pages8
ISBN (Electronic)9781510896932
Publication statusPublished - 2020
Event18th European Conference on Composite Materials, ECCM 2018 - Athens, Greece
Duration: 24 Jun 201828 Jun 2018

Conference

Conference18th European Conference on Composite Materials, ECCM 2018
CountryGreece
CityAthens
Period24/06/1828/06/18

Keywords

  • Cohesive Element
  • Cohesive Zone Modelling
  • Delamination
  • Fracture Mechanics

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