Stress Strain Graph

The stress strain graph for a metal wire is shown in the fig. Upto the point E, the wire returns to its original state O along the curve EPO, when it is gradually unloaded. Point B corresponds to the fracture of the wire. (a) Upto what point on the curve is Hooke's law obeyed? (this point some times called proportional limits). (b) Which point on the curve corresponding to elastic limet or yield point of the wire? (c ) Indicate teh elastice and plastic regions of the stree-strain graph. (d) Describe what happens when the wire is loaded upto a stress corresponding to the point A on the graph and then unloaded gradulally. In particular explain the dotted curve. (e) Wht is peculiar about the protion of the stree- strain graph from C to B? Upto what stress can the wire be subjected with out causing fracture?

Stress to strain ratio is equivalent to

What does the slops of stress versus strain graph indicate?

The shape of stress vs strain graph within elastic limit is :

Define the terms stress and strain and also state their SI units. Draw the stress versus strain graph for a metallic wire, when stretched upto the breaking point.

The stress versus strain graphs for wires of two materials A and B are as shown in the figure. If YA and YB are the Young's moduli of the materials then

The stress versus strain graphs for wires of two materials A and B are as shown in the figure. If Y_(A) and Y_(B) are the younng's moduli of the materials, then

The stress versus strain graph for two materials A and B are shown in fig. the graph are on the same scale. ltbr. (a) Which materail has greater Young's modulus? (b) which of the two is stronger materail?

Modulus OF Rigidity|| Bulk Modulus|| Stress-Strain curve

Stress strain Curve|| Elastic Fatigue|| Hysteresis|| Poisson's Ratio