ISO 3800 1st Edition, January 1, 1993
Threaded Fasteners - Axial Load Fatigue Testing - Test Methods and Evaluation of Results First Edition;
Additional Comments: SAME AS BS 7774
Published By:International Organization for Standardization (ISO)
This International Standard specifies the conditions for carrying out axial load fatigue tests on threaded fasteners, as well as recommendations for the evaluation of the results.
Unless otherwise agreed, the tests are of the fluctuating tension type and are carried out at room temperature, the loading applied being centric along the longitudinal axis of the fastener. The influence of the compliance of clamped parts on the strain of the fastener is not taken into account.
This method allows determination of the fatigue strength of threaded fasteners.
The test results can be influenced by the test conditions. For this reason, minimum requirements are specified to reduce this effect. In addition, calibration and centring control methods for the testing apparatus are included.