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Zwick/Roell AG acquired the German company GTM in 2007 and Messphysik of Austria in 2006. In 2014 ZwickRoell opened its new factory in Taicang, China , some 50 km north-west of Shanghai . Here, on a site totaling around 2,000 m 2 , testing machines and instruments will be developed and assembled for the Chinese and world markets.
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 ...
Static fatigue tests can be used to determine the lifespan of a material with different loads and environmental conditions. [13] [14] However, accurately assessing a material's true static fatigue life presents challenges, as these tests often require an extended duration and there is significant variability in the results.
Use of the vibration-fatigue methods is well-suited, as structural analysis is studied in the frequency-domain. Common practice in the automotive industry is the use of accelerated vibration tests. During the test, a part or a product is exposed to vibration, that are in correlation with those expected during the service-life of the product. To ...
Early on October 18, 2024, Wales police received a phone call from a member of the public. It was the start of a mystery that remains unsolved four months later.
Low cycle fatigue (LCF) has two fundamental characteristics: plastic deformation in each cycle; and low cycle phenomenon, in which the materials have finite endurance for this type of load. The term cycle refers to repeated applications of stress that lead to eventual fatigue and failure; low-cycle pertains to a long period between applications.
Introductory Fatigue Tests on Welded Joints in High Strength Steel and Aluminium Treated by Various Improvement Methods Including Ultrasonic Impact Treatment (UIT). 51st Annual Assembly of the International Institute of Welding. IIW Doc. XIII-1748-98, Hamburg, 1998. P.J. Haagensen, E.S. Statnikov, L. Lopez-Martinez. Repair of Fatigue Cracks.
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