a) Steel bolt of diameter 25 mm passes through an aluminium sleeve of thickness 4 mm and outside diameter of 48 mm as shown in figure Q6. Due to tightening of the nut, the rigid washers move towards each other by 0.75 mm. Determine the following:- i. The stress in the bolt (6 Marks) First calculate F= AEx ii. Extension in the bolt (4 Marks) iii. If the thread pitch is 1.5 mm, the ==픈 Os Bolt Sleeve number of turns made by the nut. (2 Marks) F= EXA EXA Rigid washers Info Given 65 ta = 4mm ہی 300 mm- 25 mm 25 mm Figure Q6. E for steel is 200 GPa and E for aluminium if 70 GPa =25mm, out4mm Pin-40mm Est = 200 GPa EA=70 GPa * The nut, the rigid washers more towards each other x=0.75mm