Physics > Elasticity > 9.0 The Stress – Strain Curve
Elasticity
1.0 Basic Definitions
2.0 Stress
3.0 Strain
4.0 Hooke’s Law and Modulus of Elasticity
5.0 Types of Modulus of Elasticity
6.0 Elongation of Rod Under its Self Weight
7.0 Bulk Modulus of Elasticity
8.0 Modulus of Rigidity
9.0 The Stress – Strain Curve
10.0 Analogy of Rod as a Spring
11.0 Potential Energy in a Stretched Wire
12.0 Thermal Stress & Strains
13.0 Poisson’s Ratio
14.0 Relation Between $Y$, $B$, $\eta$ and $\sigma$
9.1 Elastic After Effect
We know that some materials bodies take some time to regain their original configuration when the deforming force is removed. The delay in regaining the original configuration by the bodies on the removal of deforming force is called elastic after effect.
The elastic after effect is negligibly small for quartz fibre and phosphorus bronze. For this reason, the suspensions are made from quartz and galvanometers and electrometers are made from phosphorus-bronze.
Glass fibre elastic effect after effect is very large. It takes hours for glass fibre to return to its original state on removal of deforming force.
