This International Standard specifies the conditions for carrying out axial load fatigue tests on threaded fasteners. ISO 3800/II1) specifies methods of statistically deter-mining fatigue strengths. The tests specified are of the fluctuating tension type as defined in ISO/R 373, subclause 3.2.3, and are carried out at room temperature, in air, the loading applied being along the longitudinal axis of the fastener. These methods allow the fatigue strength of threaded fasteners in open joints (clamped parts are not in contact) to be determined independently of their application.
Since the test fixtures can introduce variables in results, minimum requirements are specified to reduce their effect. Calibration and alignment control methods are included.
DS/ISO 3800-1:1988 history
1988DS/ISO 3800-1:1988 Threaded fasteners. Axial load fatigue testing. Part I: Test methods