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Category: Materials Science

Interpreting Stress-Strain Diagrams

Interpreting Stress-Strain Diagrams

A Stress-Strain Diagram gives you information on how a specific material deforms under an applied stress. Even though a stress-strain diagram will look slightly different for each material you test, there are certain diagnostic features that are good to keep in mind. Linear Elastic Regime: Stress is linearly proportional to strain up to the yield strength (red circle). Any deformation within this regime is elastic so the material will recover its original form if the stress is removed. The slope in the linear…

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Stress vs Strain

Stress vs Strain

Stress describes the force applied to a material (per unit area) from an external source, permanent deformations in the materials, and/or uneven heating. It has the units [Pascals]. Normal Stress is the stress applied normal to the face of the material. If the normal stress results in a decreasing of the axial length of the material it is called compressive stress, and if the axial length increases it is called tensile stress. If the normal stress is applied everywhere on the…

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