What is Mechanical Testing?

Mechanical testing involves assessing the mechanical properties of a material within a specific environment.

Various types of tests are utilized to determine different properties. For instance, a tensile test measures the tensile strength of a material, a Charpy V-notch test quantifies its toughness, a Vickers hardness test indicates its hardness, and high cycle fatigue testing reveals the material’s endurance under load cycles before failure.

Certain mechanical tests provide insights into multiple properties simultaneously. For instance, a tensile test not only determines a material’s ultimate tensile strength but also provides data on its yield strength, modulus of elasticity, and even its ductility or brittleness based on the stress-strain curve and fracture behaviour.

Different tests can assess the same mechanical properties. For example, toughness can be evaluated using a Charpy V-notch test or an Izod test, while hardness can be measured using Vickers, Brinell, or Rockwell tests. The slight differences between each testing technique enable engineers to select the most suitable mechanical test for their specific requirements.

Mechanical testing plays a crucial role in design and manufacturing processes, and it can be performed internally or outsourced to external testing laboratories.

Irrespective of the testing location, the primary objective of mechanical testing is to ensure the integrity of final products or structures. Consequently, tests should be conducted under environmental conditions similar to those experienced by the end product.

The testing requirements are usually specified in the drawings for different parts, making the manufacturer responsible for conducting the tests.

In addition to ensuring integrity, mechanical testing aids in cost-effective design and facilitates technological innovation. Designers and manufacturing teams can employ such testing to validate enhancements and enhance part quality.

Mechanical tests also serve as a means to mitigate unforeseen failures and contribute to failure investigations.