a rectangular bar of length l has a slot in the middle half of its length. the bar has width b, thickness t, and modulus of elasticity E. the slot has a width b/4. the stress in the middle region is 24000 psi, the length is 30 in, andthe modulus of elasticity is 30X10^6 psi. assume elongation max = 0.02 in.
if the total elongation of the bar is limited to 0.02 in what is the max length of the slotted region? assume axial stress in the middle region remains at 160 MPa