Mitsubishi Heavy Industries Technical Review
    Vol. 53 No. 4 (2016)   New Products & Technologies
    Technical Papers

    Development of Quick Repair Method for Aircraft Composite Structures

    Masayoshi Suhara,
    Takayuki Shimizu,
    Koichi Hasegawa,
    Toshikazu Shigetomi,
    Masakazu Kamibayashi,
    Yukihiro Sato

    This paper presents a quick repair method for composite structures mainly developed for aircraft. Existing repair methods use uncured prepreg for repair patches and it takes a long time to form and cure the repair patches. The developed method uses pre-cured thin repair patches between which glue is applied. To perform repairs, these patches are formed to fit the area to be repaired, attached to the area and are then pressurized under atmospheric pressure. Next, the glue is heated and cured using a heater mat. For verification of the feasibility of the developed method, a bonding quality confirmation test, an inspectability confirmation test and a strength test were implemented and the validity of the developed method was confirmed. This technology reduces the repair time of a composite structure by approximately 70% in comparison to existing methods, and therefore allows damaged aircraft to return to operation more quickly.