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Mechanical testing covers a wide range of tests, which can be divided broadly into two types: those that aim to determine a material's mechanical properties, independent of geometry. [1] those that determine the response of a structure to a given action, e.g. testing of composite beams, aircraft structures to destruction, etc.
The characterization of mechanical properties in polymers typically refers to a measure of the strength, elasticity, viscoelasticity, and anisotropy of a polymeric material. The mechanical properties of a polymer are strongly dependent upon the Van der Waals interactions of the polymer chains, and the ability of the chains to elongate and align ...
Mechanical testing: hardness testing, tensile testing, Charpy impact testing Chemical testing: microprobe analysis, energy dispersive spectroscopy Non-destructive testing : Non-destructive testing is a test method that allows certain physical properties of metal to be examined without taking the samples completely out of service.
[1] [2] The scope of the term often differs; some definitions limit the term's use to techniques which study the microscopic structure and properties of materials, [2] while others use the term to refer to any materials analysis process including macroscopic techniques such as mechanical testing, thermal analysis and density calculation. [3]
Accelerated life testing is the process of testing a product by subjecting it to conditions (stress, strain, temperatures, voltage, vibration rate, pressure etc.) in excess of its normal service parameters in an effort to uncover faults and potential modes of failure in a short amount of time.
Yield strength testing involves taking a small sample with a fixed cross-section area and then pulling it with a controlled, gradually increasing force until the sample changes shape or breaks. This is called a tensile test. Longitudinal and/or transverse strain is recorded using mechanical or optical extensometers.
Nanoindentation, also called instrumented indentation testing, [1] is a variety of indentation hardness tests applied to small volumes. Indentation is perhaps the most commonly applied means of testing the mechanical properties of materials.
Triaxial apparatus with sample attached ready for testing. In materials science, a triaxial shear test is a common method to measure the mechanical properties of many deformable solids, especially soil (e.g., sand, clay) and rock, and other granular materials or powders.