A High Power Diode Laser-based technique for the bonding of composite patches to aluminium alloys on various military aircraft

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

Abstract

A rapid, effective and repeatable technique for repairing the damaged skins of various military aircraft, both fixed and rotary winged, using a high power diode laser (HPDL) is described herein. The HPDL was traversed across the surface of an APC-2 repair patch, thereby melting a thermoplastic adhesive placed in between the repair patch and an Alclad substrate, consequently bonding the repair patch to the Alclad substrate. When subjected to single lap shear tests, the shear strength of the HPDL bond was 47.8 ± 4.7 MPa, compared to 32.4 ± 3.7 MPa for the induction welded samples. When subjected to the Boeing wedge test, the HPDL samples had a 1 h crack growth rate that was rated as very good (1.9 ± 0.5 mm/h); for the induction welded samples the 1 h crack growth rate that was rated as good (2.7 ± 1.2 mm/h). Of great significance was processing time achieved with the HPDL, which was reduced from 11.75 mins when employing induction welding to 2.75 mins with the HPDL. Moreover, the HPDL has been shown in this work to be a tool for bonding that is superior to its contemporary counterparts. It is, therefore, distinctly possible that even stronger bonds could be achieved with the HPDL if different adhesives were used.

Original languageEnglish
Title of host publicationProceedings of the 23rd international congress on applications of lasers and electro-optics 2004
EditorsRajesh Patel
PublisherLaser Institute of America
ISBN (Print)0912035773, 9780912035772
Publication statusPublished - 1 Dec 2004
Externally publishedYes
Event23rd International Congress on Applications of Laser and Electro-Optics - San Francisco, United States
Duration: 4 Oct 20047 Oct 2004

Publication series

NameICALEO 2004 - 23rd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings

Conference

Conference23rd International Congress on Applications of Laser and Electro-Optics
Abbreviated titleICALEO 2004
CountryUnited States
CitySan Francisco
Period4/10/047/10/04

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Electrical and Electronic Engineering

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  • Cite this

    Lawrence, J. (2004). A High Power Diode Laser-based technique for the bonding of composite patches to aluminium alloys on various military aircraft. In R. Patel (Ed.), Proceedings of the 23rd international congress on applications of lasers and electro-optics 2004 (ICALEO 2004 - 23rd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings). Laser Institute of America.