Produces stress-strain data to find yield and ultimate strength.
A specimen is pulled at constant rate while force and extension are recorded (ASTM E8, ISO 6892). Results: Young's modulus, yield strength (0.2% offset), UTS, elongation, reduction of area. Necking begins at UTS. True stress and strain correct for area change.
Mild steel shows a distinct yield point and ~25% elongation.
The tensile test gives the yield strength, tensile strength and ductility that appear in every material specification.
Produces stress-strain data to find yield and ultimate strength.
The tensile test gives the yield strength, tensile strength and ductility that appear in every material specification.
The stress at which a material begins to deform permanently, often defined using a 0.2 percent offset.
The percentage increase in gauge length at failure, which indicates ductility and how much a part can deform before breaking.
Typical applications include checking the yield strength of a steel batch against a standard, measuring the elongation of an aluminium alloy for forming and comparing the strength of two polymers for a clip design.
Study "Hardness testing" first (topic 9 of 100 in Materials & Chemical). It covers the groundwork this topic builds on.
Gauge length. Strain rate effects. Extensometer.
Mild steel shows a distinct yield point and ~25% elongation.
The next topic is "Impact testing", which builds directly on this one.
It is classed as Beginner in Materials & Chemical (topic 10 of 100). It is an entry-level topic. It relies only on basic school mathematics and the ideas introduced earlier in this discipline.
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