A 5mm thick aluminium alloy strip is rolled to a thickness of 4mm using steel rollers
of radius of 100 mm. The tensile yield stress of aluminium is 0.28 kN/mm2
. Determine
(i) coefficient of friction min between the workpiece and the rolls for an unaided bite
to be possible (ii) the angle subtended by the contact zone at the roll centre, and (iii) the
location of the neutral point with = min.
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