Hooke's Law|Stress-Strain Curve

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

The graph given is a stress-strain curve for

Elasticity - Introduction|Terminology To Study Strength / Elasticity Of A Certain Solid|Hooke's Law|Hooke's Curve|Questions|Energy Density|Bulk Modulus

Hooke's law states that,

Assertion Upto elastic limit of a stress-strain curve, the steel wire tends to regain its original shape when stress is removed. Reason Within elastic limit, the wire follows Hooke's law.

The point on the stress-strain curve at which the strain begins to increase even without any increase in the stress is

Distinguish between ductile and brittle materials on the basis of stress-strain curve

The diagram shoes stress v/s strain curve for the materials A and B. From the curves we infer that

Figure shows the relationship between tensile stress and strain for a typical material. Below proportional point A, stress is directly proportional to strain which means Young's moudulus (Y) is a constant. In this region the material obeys Hooke's law. Provided the strain is below the yield point 'B' the material returns to its original shape and size when the force is removed. Beyond the yield point, the material retains a permancnt deformation after the stress is removed. For stresses beyond the yeld point, the material exhibit plastic flow, which means that it continues to elongate for little increases in the stress. Beyond C a local constriction occurs. The material fractures at D (i.e. breaking point). The graph below shows the stress-strain curve for 4 different materials. If you bough a new shoe which bites in the beginning and later on fits perfectly, then the material used to making the shoe is

Figure shows the relationship between tensile stress and strain for a typical material. Below proportional point A, stress is directly proportional to strain which means Young's moudulus (Y) is a constant. In this region the material obeys Hooke's law. Provided the strain is below the yield point 'B' the material returns to its original shape and size when the force is removed. Beyond the yield point, the material retains a permancnt deformation after the stress is removed. For stresses beyond the yeld point, the material exhibit plastic flow, which means that it continues to elongate for little increases in the stress. Beyond C a local constriction occurs. The material fractures at D (i.e. breaking point). The graph below shows the stress-strain curve for 4 different materials. Material which is good for making wires by stretching is