Electro-Magnetic Forming of Fiber Metal Laminates

Abstract

The paper presents the results of forming rifts in five-layer metal polymer laminates by electro-magnetic forming. During the experimental studies the discharge energy of the electro-magnetic machine was varied in such a way as to achieve different depths of the rift. Samples obtained by electro-magnetic forming were compared with control samples obtained by forming using a rubber pad under static loading. The strain state of the samples was analyzed using an digital image correlation system Vic-3D.

New Advances and Future Possibilities in Forming Technology of Hybrid Metal–Polymer Composites Used in Aerospace Applications

“…Recently, these forming methods were utilised to form steel-based FMLs, but the latest research papers have been focused mainly on aluminium-based composites. Researchers consider the configuration of the material layers [374][375][376][377] or the process parameter setup [86,[378][379][380][381][382][383][384][385][386] to reduce material defects and go beyond the current forming limits caused mainly by breakage and wrinkling. In order to improve the formability of the layers of FRP, many studies are focused on die forming at elevated temperatures [387][388][389].…”

“…A pulsed magnetic field is used to apply Lorentz force to the workpiece, which causes deformation. The EMF process influences such properties as residual stresses, impact toughness, and durability, and its major advantage is that it increases the formability of materials [380,402]. Chernikov et al [127] compared the electromagnetic forming of five-layer fibre reinforced metal polymer laminates with forming using a rubber pad.…”

“…It was found that the rift zone was dominated by compressive circumferential strains, rather than tensile radial strains as during conventional rubber pad forming. Glushchenkov et al [380] applied EMF to a five-layer metal-polymer composite fabricated with a 0.3 mm thickness commercial aluminium with carbon fibre interlayers bounded with two-way reinforced epoxy laminate. The strains have been analysed using the Vic-3D system, before and after deformation, and the results were compared to the rubber pad forming method.…”

“…Khardin et al [381] investigated an Al-polymer-A (0.3 mm + 0.6 mm + 0.3 mm) sandwich using the electromagnetic bending method. Blank were made of two AW-Al Mn1Mg0.5 sheets and a thermoplastic polyolefin middle layer Glushchenkov et al [380] applied EMF to a five-layer metal-polymer composite fabricated with a 0.3 mm thickness commercial aluminium with carbon fibre interlayers bounded with two-way reinforced epoxy laminate. The strains have been analysed using the Vic-3D system, before and after deformation, and the results were compared to the rubber pad forming method.…”