A spring of mean coil diameter 50mm, wire diameter 10mm, active number of coils 11 and free length 180mm is available. It is to be used at a place where load varies from p to 3p . Find the value of load this spring can take up. Given that fyp=700 n/mm2 , and design factor =1.3. Take fc = 475/d0.2 n/mm2 , d is in mm. Find the buckling load and critical frequency. Take c=0.8 x 105 n/mm2 , and w=0.08 mn/m3 .
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