ISO 1143 Metallic Materials, Rotating Bar Bending Fatigue Test

Metal Test Laboratory

ISO 1143 Metallic Materials, Rotating Bar Bending Fatigue Test

EUROLAB laboratory provides testing and compliance services within the scope of ISO 1143 standard. This standard specifies the method for rotating bar bending fatigue testing of metallic materials. Tests are performed at room temperature or at elevated temperature in air by rotating the sample.

ISO 1143 Metallic Materials, Rotating Bar Bending Fatigue Test

Fatigue tests on notched specimens are not covered by this document, as the shape and size of notched specimens are not standardized. However, the fatigue testing procedures described in this document are applicable to fatigue testing of notched specimens.

Nominally identical samples are used, each of which is rotated and subjected to a constant bending moment. The forces that cause the bending moment do not rotate. The specimen can be mounted as a cantilever with single-point or two-point loading, or as a beam with four-point loading. The test continues until the specimen fails or until a predetermined number of stress cycles is achieved, one stress cycle corresponding to a full rotation of the specimen.

All specimens used in a test series for fatigue life determination must have the same tolerance on size, shape and diameter. The actual minimum diameter of each specimen should be measured with an accuracy of 0,01 mm in order to calculate the force to be applied to obtain the required stress. Care must be taken when measuring the sample prior to testing to ensure that the surface is not damaged.

In any rotating bar bending fatigue test program designed to characterize the intrinsic properties of a material, it is important to follow some recommendations in preparing samples. A possible reason for deviating from these recommendations is that the test program aims to determine the effect of a particular factor (surface treatment, oxidation, etc.) that is not in line with the recommendations. In any case, any deviations should be noted in the test report.

The unique marking or identity of each sample must be retained at all stages of its preparation. This can be applied using any reliable method in an area that is unlikely to be lost during processing or likely to adversely affect the quality of the test. Upon completion of the machining process, it is desirable to uniquely mark both ends of each sample so that each half can still be identified after failure of a sample.

EUROLAB assists manufacturers with ISO 1143 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.

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