Ductile Material Stress-Strain Stages

Ductile materials such as structural steel and aluminium show a multi-stage stress-strain response. When a specimen is loaded, its length first increases linearly at a slow rate. This produces a steep straight line on the stress-strain diagram. That initial part shows elastic deformation, which means the material returns to ...

When a specimen is subjected to loading the length first increases linearly at a slow rate, resulting in an initial straight line with a steep slope on the stress-strain diagram.

Upon reaching a critical stress value, the specimen undergoes significant deformation with minimal increase in applied load, primarily due to shearing stresses c...