Wrinkling of corrugated skin sandwich panels |
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| Affiliation: | 1. College of Energy and Electrical Engineering, Hohai University, No. 8 Fochengxi Road, Nanjing 211100, PR China;2. School of Civil Engineering and Architecture, Wuyi University, No. 22 Dongcheng Village, Jiangmen 529020, PR China;3. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, PR China;1. Coventry University, Faculty of Engineering and Computing, CV1 5FB, United Kingdom;2. Cranfield University, School of Aerospace, Transport and Manufacturing, Building B83/F36, MK43 0AL, United Kingdom;1. School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing, 100191, China;2. Beijing FRP Research and Design Institute, No. 261 Kangxi Road, Yanqing District, Beijing, 102101, China;3. State Key Laboratory of Advanced Fiber Composite, No.261 Kangxi Road, Badaling Industry Development Zone, Yanqing District, Beijing, 102101, China;4. Ningbo Innovation Research Institute, Beihang University, Qixing South Road, Beilun District, Ningbo, 315800, China;5. Research Institute of Frontier Science, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing, 100191, China |
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| Abstract: | Compression wrinkling of composite sandwich panels with corrugated skins was investigated numerically, analytically and experimentally. Semi-circular and sine-wave shaped corrugations were studied. The corrugations significantly increased wrinkling strength when compared with equal mass flat panels. Semi-circular corrugations proved to be highly preferable to sine-wave shaped corrugations due to localized buckling in the latter. Over 40 fiberglass and foam core sandwich specimens were manufactured with semi-circular skin corrugations. These specimens were tested to failure, providing confirmation of the numerical and analytical results. |
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