Towards understanding residual strength and damage evolution in damaged composite laminates

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific

58 Downloads (Pure)

Abstract

Fibre reinforced polymer composites have found increasing use in aircraft structures. This means that fleet managers need damage assessment tools for such materials, in order to decide on appropriate sustainment strategies. Developing such tools is hindered by the difficulty of generalising from lab tests to predict the behaviour of full-scale structures. A more focussed research effort is needed to address the knowledge gaps that prevent such generalisations. This paper highlights the limitations of current non-destructive inspection techniques, and how this can lead to misinterpretation of experimental results. Furthermore, it discusses differences between coupons and full-scale structures caused by 1D vs 2D delamination growth and the effects of lay-up. New test methods to deal with these issues are discussed and some preliminary results are presented. Finally, the paper discusses the prediction of residual strength and the difficulties of determining a suitable end-point for damage propagation analyses. While the residual strength in the presence of a given damage can be accurately modelled for small components, if sufficiently computational resources are available, further development is needed to develop tools that can be implemented for sustainment of operational aircraft.
Original languageEnglish
Title of host publicationProceedings of the 31st symposium of ICAF - the International Committee on Aeronautical Fatigue and Structural Integrity
Place of PublicationDelft
Number of pages13
Publication statusPublished - 2023
EventICAF 2023 – the 38th Conference and 31st Symposium of the International Committee on Aeronautical Fatigue and Structural Integrity: Structural Integrity In A World In Transition - Theater de Veste, Asvest 1, 2611 PK, Delft, Netherlands
Duration: 26 Jun 202329 Jun 2023
https://www.icaf2023.nl/

Conference

ConferenceICAF 2023 – the 38th Conference and 31st Symposium of the International Committee on Aeronautical Fatigue and Structural Integrity
Abbreviated titleICAF 2023
Country/TerritoryNetherlands
CityDelft
Period26/06/2329/06/23
Internet address

Keywords

  • CFRP
  • Damage Tolerance
  • Delamination
  • Fatigue
  • NDT

Fingerprint

Dive into the research topics of 'Towards understanding residual strength and damage evolution in damaged composite laminates'. Together they form a unique fingerprint.

Cite this