Determine the size of the bolts if yield strength of bolt is 400N/mm² and factor of safety is 4. The bolts are equidistant having separated by 60mm and the margin to the left and right is 25mm. Also P=5kN acts at a distance of 200mm from the channel.
A)14.34mm
B)13.44mm
C)15.44mm
D)12.66mm

Question

Quizplus · Accepted Answer

The correct bolt size can be determined by calculating the stress on the bolt and then finding the required area for that stress, followed by calculating the diameter. Given the yield strength of 400N/mm² and a factor of safety of 4, the allowable stress is 400N/mm² / 4 = 100N/mm². The force P=5kN (or 5000N) acts at a distance of 200mm, creating a moment that the bolts must resist. The calculation involves determining the bolt size that can safely carry this load without exceeding the allowable stress. The specific calculation steps to arrive at the correct bolt size (13.44mm) involve mechanics of materials and statics principles, including moment calculations and stress analysis, which are not detailed in this brief explanation.

Determine the Size of the Bolts If Yield Strength of Bolt