To what radius an Aluminium strip 300 mm wide and 40mm thick can be bent, if the maximum stress in a strip is not to exceed 40 N/mm2. Take young’s modulus for Aluminium is 7×105 N/mm2.

To what radius an Aluminium strip 300 mm wide and 40mm thick can be bent, if the maximum stress in a strip is not to exceed 40 N/mm2. Take young’s modulus for Aluminium is 7×105 N/mm2. Correct Answer 35m

Here, b = 300mm d= 40mm. y= 20mm. From the relation; E/R = f/y R= E×y/f =70×103 × 20 / 40 = 35m.
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