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Published byKathryn Hoover Modified over 9 years ago
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Making Automobiles Lighter A primary concern of auto manufacturers Prof. Prashant P. Date Department of Mechanical Engineering IIT Bombay, Powai, Mumbai 400 076
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RESEARCH FOCUS REDUCTION IN THE WEIGHT Primarily OF SHEET METAL COMPONENTS
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Strategies of weight reduction Present Thickness reduction Use of Light Weight material Use of Tailor welded blanks Enhance Stiffness/Weight ratio Future Hollow structural parts Hydroformed parts
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Thickness reduction Use High strength materials for - side door impact beams - clutch pedal - brake pedal In place of Low carbon steel
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Thickness reduction PartLow carbon steel High Strength Steel Side-door impact beams ( Shape factor ) 1.381.42 Clutch & brake pedal (Thickness ) 5 mm 4 mm
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Light Weight material Al-Li - High strength to weight ratio Lower E compared to steel - Formability of Al-Li alloy sheets at room temperature - Optimisation of heat treatment of Al-Li alloy sheets Problems : Cost & Weldability of Al-Li alloys
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Al-Li alloy fender Steel fender
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Tailor Welded Blanks Deformation behaviour and weld line movement of tailor-welded blanks of Aluminium and steel Effect of various parameters like thickness ratio, rolling direction & width Study of Laser welding process for Aluminium and steel Final aim is to design a weld contour to avoid stressing the weld during forming.
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Stiffness/Weight ratio by design Weight reduction maintaining stiffness and dent resistance - Studies on the stiffness of formed sheet metal parts without external stiffeners using Finite element analysis - Extruded ribbed panel will be analyzed for stiffness characteristics
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Part quality by process design
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THANK YOU FOR YOUR ATTENTION
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