Aerofit
Flexure Fatigue Test
Mechanical Flexure Testing is a method of determining and classifying the fatigue strengths of re-connectable or permanent hydraulic tube joints.
The test specimen typically consists of a fitting joined to a specified length of straight tubing. The assembly is then fitted with strain gages which are used to determine the amount of deflection required to generate the required load or bending stress.
Rigid Manifold
The fitting being tested is rigidly mounted in the manifold that allows the assembly to be pressurized to the operating pressure. Internal pressure is maintained throughout the duration of the test.
The opposite end of the specimen is deflected by moving the boring head off center until the desired bending stress in the tube assembly is reached. This is determined by the strain gage equipment. Optionally, the sample may be setup by deflection at a specified length.
Strain Gage Measuring Equipment
Once the setup is completed the sample is pressurized in a range of 1,800 to 3,500 CPM and the boring head is rotated at a test cycle rate. All parameters are maintained until the specimen fails or meets the number of cycles required by the applicable specification.
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