Tensile testing is also known as tension test, and properly one of the most common type of mechanical tests used on materials across various industries. It is an easy and quick and cost effective way to find out how a material performs under tension.
Performing Tensile Testing
When performing a tensile test, a sample of the material is fixed in one end, and a pulling force is applied in the other end.
This is done in a tensile tester which there is an example of on the right. During the test it constantly monitors the load it applies, together with the elongation of the sample as an effect of the load. Below is the shape of a typical curve generated during the test.
The above curve provide following information about the material.
- Ultimate Strength: Also called UTS, is the load it takes to make the material break. This value is read from the highest point of the curve.
- Elasticity: The slope of the linear curve will show the elasticity (E) of the material which is also described by Hooke’s Law “E = σ / ɛ”.
- Yield Strength: Is the force applied at the point where the curve stop being linear, this is where plastic deformation happens. If the force is removed during the linear part of the curve, the material will return to its initial stage again. Once plastic deformation happen, the initial stage of the material can no longer be obtained.
Usage of Tensile Test
Tensile test can be used in several stages of a project, during development of a product it can be used to compare different materials, to identify the one with most suitable characteristics. Another scenario could be the tensile test being performed during a problem solving exercise when an issue arise.
If you would like to know more about tensile testing and how to use it as part of problem solving or risk mitigation, then our 8D Training or FMEA Training might be of interest to you. Please contact us for a free quote with no obligations.
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