Low-velocity impact and fatigue response of Ti/GFRP laminates

Hayato Nakatani, Tatsuro Kosaka, Jun Oki, Katsuhiko Osaka, Yoshihiro Sawada, Tomonaga Okabe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In recent years, studies for a new kind of fiber metal laminates, Ti/CFRP, sometimes called TiGr have been increasing for the application to advanced supersonic aircrafts. In these studies, however, sufficient observations of damages, especially internal ones, were not exhibited. In the present paper, the fatigue damage behaviour and impact responses and damages of fiber metal laminates based on a titanium alloy and GFRP as Ti/FRP system was investigated in detail. At first, fatigue tests for open-hole specimens of Ti/GFRP were conducted. From the experimental evidence, the dominant fatigue damage modes were identified as cracks and delaminations of the Ti layer, transverse cracks of the 90° layer and 0790° interlaminar delaminations in the GFRP layer near the open-hole. A finite element model based on these fatigue damage modes was developed, and this model was confirmed to predict the changes in mechanical properties of the laminates. Low-velocity impact tests were also conducted for the laminates with single Ti layer. From the experimental results, it was found that laminates with single Ti layer at non-impacted side showed good impact resistance, and in this case, the extent of interlaminar delaminations in GFRP was dependent on damages of Ti layer presented during the impact event. Numerical analyses of impact events were also carried out in order to verify the relationship between the internal/external damages and the impact responses. The numerical results showed that the impact responses of the laminates could be represented by the FE analysis.

Original languageEnglish
Title of host publicationProgress of Composites 2008 in Asia and Australasia - Proceedings of the 6th Asian-Australasian Conference on Composite Materials, ACCM 2008
Pages168-171
Number of pages4
Publication statusPublished - 2008 Dec 1
Event6th Asian-Australasian Conference on Composite Materials: Progress of Composites 2008 in Asia and Australasia, ACCM 2008 - Kumamoto, Kyushu, Japan
Duration: 2008 Sep 232008 Sep 26

Publication series

NameProgress of Composites 2008 in Asia and Australasia - Proceedings of the 6th Asian-Australasian Conference on Composite Materials, ACCM 2008

Other

Other6th Asian-Australasian Conference on Composite Materials: Progress of Composites 2008 in Asia and Australasia, ACCM 2008
Country/TerritoryJapan
CityKumamoto, Kyushu
Period08/9/2308/9/26

Keywords

  • Damage Growth
  • Delamination
  • Fatigue
  • Fibre Metal Laminates (FML)
  • Finite element method
  • Impact

ASJC Scopus subject areas

  • Ceramics and Composites

Fingerprint

Dive into the research topics of 'Low-velocity impact and fatigue response of Ti/GFRP laminates'. Together they form a unique fingerprint.

Cite this