An aluminum bar 600mm long with diameter 40mm, has a hole drilled in the center of the bar. The hole is 30mm in diameter and is
100mm long. If the modulus of elasticity for the aluminum is 85GN/m2,calculate the total contraction on the bar due to a compressive load of the 180KN.
Explanation: stress over elastic modulus of Al = stress of elastic of drilled circular.therefore stress over modulus of Al = stress over modulus of drilled
