Rotary bending fatigue S/N curve fitting test method for aviation hydraulic conduit
A bending fatigue and curve fitting technology, applied in the application of stable bending force to test the strength of materials, the test of machine/structural components, and the application of repetitive force/pulse force to test the strength of materials, etc. The number of parts is large and the test process is complicated, so as to reduce the test cost, simplify the test process and shorten the test cycle.
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[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0028] combine Figure 2 to Figure 4 As shown in the figure, a method for testing and fitting the S / N curve of the rotational bending fatigue of an aviation hydraulic conduit provided by the embodiment of the present invention includes the following steps:
[0029] First, according to the tensile strength limit value of the hydraulic conduit 63, the test groups and test bending stress values are determined. One test piece from each group is installed on the rotating bending fatigue test equipment, and the rotation is carried out under the specified differe...
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