Development of a Formability Prediction Model for Aluminium Sandwich Panels with Polymer Core |
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| Authors: | Xiaochuan Liu Bozhou Di Xiangnan Yu Heli Liu Saksham Dhawan Denis J. Politis Mateusz Kopec Liliang Wang |
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| Affiliation: | 1.Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK; (X.L.); (B.D.); (H.L.); (S.D.); (M.K.); (L.W.);2.School of Mechanical Engineering, Xi’an Jiao Tong University, Xi’an 710049, China;3.Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia 1678, Cyprus;4.Institute of Fundamental Technological Research Polish Academy of Sciences, Pawinskiego 5B, 02-106 Warsaw, Poland |
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| Abstract: | In the present work, the compatibility relationship on the failure criteria between aluminium and polymer was established, and a mechanics-based model for a three-layered sandwich panel was developed based on the M-K model to predict its Forming Limit Diagram (FLD). A case study for a sandwich panel consisting of face layers from AA5754 aluminium alloy and a core layer from polyvinylidene difluoride (PVDF) was subsequently conducted, suggesting that the loading path of aluminium was linear and independent of the punch radius, while the risk for failure of PVDF increased with a decreasing radius and an increasing strain ratio. Therefore, the developed formability model would be conducive to the safety evaluation on the plastic forming and critical failure of composite sandwich panels. |
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| Keywords: | formability M-K model failure criteria composite sandwich panel |
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