Design optimization and the reduction of design costs have influenced the development of computational methods used in engineering work. One of the criteria for designing machine components is fatigue life. The necessary data required for calculations, concerning the fatigue properties of a material, are determined during experimental tests. The result of these tests is the Wöhler curve, which describes the relationship N = f(Sa).Determining the Wöhler curve in a laboratory operating under accreditation principles is based on a testing procedure. The measurement uncertainty of fatigue life test results depends on many factors directly related to the execution of the tests.
The paper presents the assumptions and key elements of the procedure for estimating uncertainty regarding fatigue life tests in an accredited laboratory.
MEASUREMENT UNCERTAINTY PROCEDURE OF FATIGUE LIFE OF MATERIALS APPLIED IN MACHINE DESIGN – ASSUMPTIONS AND KEY ELEMENTS
Design optimisation and decreasing of design costs influenced on development of calculation methods applied in engineering works. Fatigue life is one of the criteria for machine design. Data required for calculations connected with material fatigue properties are estimated during experimental tests. Wöhler curve describing the dependence N = f(Sa) is the result of the mentioned tests.
Estimation of Wöhler curve in a laboratory working as an accredited one is based on a test procedure. Measurement uncertainty of fatigue life tests depends on many factors directly connected with the testing procedure.
The paper presents assumptions and key elements of the measurement uncertainty procedure of fatigue life in an accredited laboratory. (…)
The article contains 20,517 characters.
Source: Logistyka Magazine