The figure below shows the stress strain diagram of a structural steel bar havin
ID: 1766617 • Letter: T
Question
The figure below shows the stress strain diagram of a structural steel bar having a length of 5m.
Considering the yield stress for the steel to be 125MPa while the modulus of elasticity
(slope for the linear part of the curve) is 180GPa. Axial load is applied to the bar
until it elongates 0.003m. The load is then removed. How is the
final length compare to the original length of the bar?
(MPa) 150 100 50 0 0 0.001 0.002 0.003 2) The figure below shows the stress strain diagram of a structural steel bar having a length of 5m. Considering the yield stress for the steel to be 125MPa while the modulus of elasticity (slope for the linear part of the curve) is 180GPa. Axial load is applied to the bar until it elongates 0.003m. The load is then removed. How is the final length compare to the original length of the bar?Explanation / Answer
The final length of the bar will be same as the initial length since yeild stress is 125 MPa which must be crossed in order to show permanent deformation in the bar. There will be an elastic recovery of the material of the rod as soon as the load is removed and the rod will gain its original length without any deformation.