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Chapter 3: Mechanical Properties of Materials
M3.2: The Stress-strain Diagram
Elastic and Inelastic Strain
Introduction To the Stress-Strain Diagram
Table of Contents
Proportional Limit
Elastic Modulus
Elastic and Inelastic Strain
Elastic Limit
Yield Strength
Ultimate Strength and Fracture
Measures of Ductility
Review of Significant Features
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The graph plots stress in p s i versus strain in inch per inch. The horizontal axis ranges from 0 to 0.1 and the vertical axis ranges from 0 to 80,000. The graph starts at the bottom left of the viewing window at the origin, goes up and to the right with constant steepness till the point (0.050, 50,000). The graph then goes up and to the right with a reduced positive slope till (0.1, 60,000). A straight line is drawn passing through (0, 0) and (0.0040, 43,700) and it overlaps the linear portion of the curve. The portion of the curve between (0, 0) and (0.086, 59,000) is highlighted. Points A and B are marked on the curve at (0.04, 43,700) and (0.086, 59,000).
Suppose the stress acting on a material is increased above the proportional limit stress...
