Question

Determine the minimum and average pressure in a plate when axial force is 4 KN. The radius of contact surface is 50 mm outside radius is 100 mm.

(a) 0.127 N/mm; 0.17 N/mm

(b) 0.186 N/mm; 0.10 N/mm

(c) 0.183 N/mm; 0.18 N/mm

(d) 0.120 N/mm; 0.72 N/mm

I got this question by my school teacher while I was bunking the class.

Question is from Farm Tractor topic in section Farm Tractor of Farm Machinery

Answer 1

Right answer is (a) 0.127 N/mm; 0.17 N/mm

To explain: Explanation: Pmin = \(\frac{W}{2πr[r0-ri]} = \frac{4000}{2*3.14*0.1[0.05]}\) = 0.127 N/mm

Average pressure, P = \(\frac{W}{\pi[r0^2-ri^2]} = \frac{4000}{π[0.1^2-0.05^2]}\) = 0.17 N/mm