Deformation behaviour of steel/SRPP fibre metal laminate characterised by evolution of surface strains
| Autor: | Raj Das, Jae Nam, Wesley J. Cantwell, Shankar Kalyanasundaram, Adrian Lowe |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Fluid Flow and Transfer Processes
Polypropylene Surface (mathematics) Materials science Hydraulic press business.industry System of measurement Aerospace Engineering Structural engineering Flange Blank law.invention chemistry.chemical_compound Dome (geology) chemistry law Deformation (engineering) Composite material business |
| Zdroj: | Advances in aircraft and spacecraft science. 3:61-75 |
| ISSN: | 2287-528X |
| Popis: | Climate changes brought on by human interventions have proved to be more devastating than predicted during the recent decades. Recognition of seriousness of the situation has led regulatory organisations to impose strict targets on allowable carbon dioxide emissions from automotive vehicles. As a possible solution, it has been proposed that Fibre Metal Laminate (FML) system is used to reduce the weight of future vehicles. To facilitate this investigation, FML based on steel and self-reinforced polypropylene was stamp formed into dome shapes under different blank holder forces (BHFs) at room temperature and its forming behaviour analysed. An open-die configuration was used in a hydraulic press so that a 3D photogrammetric measurement system (ARAMIS) could capture real-time surface strains. This paper presents findings on strain evolutions at different points along and at 45o to fibre directions of circular FML blank, through various stages of forming. It was found initiation and rate of deformation varied with distance from the pole, that the mode of deformations range from biaxial stretching at the pole to drawing towards flange region, at decreasing magnitudes away from the pole in general. More uniform strain distribution was observed for the FML compared to that of plain steel and the most significant effects of BHF were its influence on forming depth and level of strain reached before failure. |
| Databáze: | OpenAIRE |
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