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2030 – 04 – What is the Elastic Region?

A material and its stress and strain relationship is best characterized by a stress/strain graph. Every material has the same basic stress/strain principle which states that as stress increases, so does strain. When stress is too great, strain will cause the material to break.
Most metals show a gradual increase in stress and strain in the stress-strain graph. The rate at which stress and strain climb tells us the material’s modulus of elasticity. The steeper the slope, the larger the modulus, which indicates a stiffer and stronger material. If there isn’t enough stress to permanently change the metal, then the metal returns to its normal state. This rebound indicates that a metal is still in its elastic region. If stress and strain stay put, the crystal structure of the metal remains intact.

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    The steeper the stress strain chart the stronger the material.

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Class: 2030 - Mechanical Properties of Metals - 11 Lessons
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