COAMC Shanghai Aircraft Manufacturing CO Ltd

Shanghai, China

COAMC Shanghai Aircraft Manufacturing CO Ltd

Shanghai, China

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Liu S.,Beihang University | Guan Z.,Beihang University | Guo X.,Beihang University | Sun K.,COAMC Shanghai Aircraft Manufacturing CO Ltd | And 2 more authors.
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | Year: 2013

Three different repair methods were adopted in the paper to restore the mechanical performance of composite honeycomb sandwich panels with different initial damages, and an experimental study was conducted to compare the edgewise compressive capacities of repaired specimens. Test results demonstrate that all these repair methods can recover the edgewise compressive strength of specimens effectively, and the strength recoveries are all above 79% of the intact panel level. In order to analyze experimental results, k-sample Anderson-Darling test was introduced to investigate the influence of process parameters on edgewise compressive strength of repaired specimens. Test results show that middle-temperature cure can hardly affect the edgewise compressive performance of repaired specimens. However, the edgewise compressive strength is higher for specimens cured by autoclave, but the improve extent is influenced by the effective height of the repair region. Besides, unsymmetrical repair structures should be adopted cautiously to avoid the mechanical performance degradation induced by the additional bending moment.


Liu S.,Beihang University | Guan Z.,Beihang University | Guo X.,Beihang University | Sun K.,COAMC Shanghai Aircraft Manufacturing Co. | And 2 more authors.
Cailiao Kexue yu Gongyi/Material Science and Technology | Year: 2014

To analyze the influence of process factors on composite bonded repair, different repairs were adopted to restore the mechanical performance of edge closed honeycomb sandwich panels with one-side skin and whole thickness penetrated damages, and an experimental study was conducted to compare the edgewise compressive capacities of repaired specimens, and k-sample Anderson-Darling test was introduced to investigate the influence of process parameters on edgewise compressive strength of repaired specimens. The test results demonstrate that all these repair methods can recover the edgewise compressive strength of specimens effectively, and the strength recoveries are all above 90% of the intact panel level. The middle-temperature cure can decrease the edgewise compressive performance of repaired specimens apparently, and the edgewise compressive strength of specimens cured by autoclave is improved to some extent. Besides, unsymmetrical repair structures should be adopted cautiously to avoid the mechanical performance degradation induced by the additional bending moment.

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