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Fatigue testing is a specialised form of mechanical testing that is performed by applying cyclic loading to a coupon or structure. These tests are used either to generate fatigue life and crack growth data, identify critical locations or demonstrate the safety of a structure that may be susceptible to fatigue.
Fatigue tests on coupons are typically conducted using servo hydraulic test machines which are capable of applying large variable amplitude cyclic loads. [4] Constant amplitude testing can also be applied by simpler oscillating machines. The fatigue life of a coupon is the number of cycles it takes to break the coupon. This data can be used for ...
MTS Systems Corporation (MTS) is a supplier of test systems and industrial position sensors. The company provides test and measurement products to determine the performance and reliability of vehicles, aircraft, civil structures, biomedical materials and devices and raw materials.
Micrographs showing how surface fatigue cracks grow as material is further cycled. From Ewing & Humfrey, 1903. 1837: Wilhelm Albert publishes the first article on fatigue. He devised a test machine for conveyor chains used in the Clausthal mines. [11] 1839: Jean-Victor Poncelet describes metals as being 'tired' in his lectures at the military ...
Typical lectromechanical Universal Testing Machine Test fixture for three point flex test. A universal testing machine (UTM), also known as a universal tester, [1] universal tensile machine, materials testing machine, materials test frame, is used to test the tensile strength (pulling) and compressive strength (pushing), flexural strength, bending, shear, hardness, and torsion testing ...
Zwick began building machines and instruments for mechanical materials testing in 1937. The company founded by Professor Seger in 1876 evolved into the present-day concern Toni Techni. Roell and Korthouse, along with Toni Technik, have been part of the Zwick Roell Group since 1992.
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.
Vibration fatigue is a mechanical engineering term describing material fatigue, caused by forced vibration of random nature. An excited structure responds according to its natural-dynamics modes, which results in a dynamic stress load in the material points. [ 1 ]