ISO 1143-2021 PDF

Full title and description

ISO 1143:2021 — Metallic materials — Rotating bar bending fatigue testing. This International Standard specifies a standardized method for performing rotating-bar bending (rotating bending) fatigue tests on metallic materials, defining specimen form, test conditions and reporting necessary to produce comparable fatigue (S–N) data for engineering and quality purposes.

Abstract

This document specifies the method for rotating bar bending fatigue testing of metallic materials. Tests are performed with the specimen rotating and may be carried out at room temperature or at elevated temperatures in air. Fatigue tests on notched specimens are not covered by the standard, although the described procedures can be applied to notched specimens where appropriate.

General information

• Status: Published.
• Publication date: 30 July 2021 (Publication stage: International Standard published, 2021-07-30).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.040.10 — Mechanical testing of metals / fatigue testing.
• Edition / version: Edition 3 (2021).
• Number of pages: 26 pages.

Scope

ISO 1143:2021 defines a test method for obtaining fatigue-life data by rotating-bar bending on metallic materials. The scope covers specimen geometry and preparation, test-machine arrangements and control, environmental conditions (ambient or elevated temperature in air), test conduct and reporting. Notched-specimen geometries are explicitly excluded from the normative scope because they are not standardized here, although the procedures may be adapted to notched tests where suitable.

Key topics and requirements

• Specified specimen form and dimensional recommendations for rotating-bar bending specimens.
• Requirements for test equipment and machine set-up including rotating-bending fixtures and calibration.
• Test conditions and control: rotational speed/frequency, ambient or elevated temperature, air environment and run-out/failure criteria.
• Data acquisition and reporting: cycles to failure (S–N data), test conditions, specimen surface condition and preparation, and statistical treatment of results.
• Limitations and applicability: guidance that notched-specimen tests are not standardized in this document but that procedures may be adapted.
• Quality and repeatability considerations: specimen machining and surface finish, alignment, and verification to ensure comparable results between laboratories.

Typical use and users

Used by materials testing laboratories, research and development groups, quality and failure-analysis teams, and designers in industries where fatigue life is critical (for example aerospace, automotive, rotating machinery and power generation). The standard is applied when producing comparative S–N data, validating materials or heat treatments, and for material selection and engineering design input where rotating-bending loading is representative of service.

Related standards

ISO 1143:2021 supersedes ISO 1143:2010 (previous edition). Other fatigue and mechanical-testing standards used in complementary roles include national and international methods for axial, torsion and specimen preparation and for statistical analysis of S–N data (for example ASTM E466 for axial fatigue practice and related statistical practices). The standard sits under the technical work of ISO/TC 164/SC 4 (mechanical testing of metals — fatigue testing).

Keywords

rotating bar, rotating bending, bending fatigue, fatigue testing, metallic materials, S–N curve, fatigue life, specimen preparation, ISO 1143:2021, rotating-bar fatigue.

FAQ

Q: What is this standard?

A: ISO 1143:2021 is an International Standard that specifies the method for rotating bar bending fatigue testing of metallic materials, providing requirements for specimen form, test apparatus, test conditions and reporting to produce comparable fatigue data.

Q: What does it cover?

A: It covers rotating-bar bending fatigue tests conducted in air at room or elevated temperature, the required test arrangements and the information to be reported (cycles to failure, test conditions, specimen details). Notched-specimen geometries are not standardized in the document, though procedures may be adapted for them.

Q: Who typically uses it?

A: Materials test laboratories, R&D and engineering groups, quality control and failure-analysis teams, and designers in sectors where fatigue performance under rotating-bending loads is relevant (e.g., aerospace, automotive, turbomachinery).

Q: Is it current or superseded?

A: ISO 1143:2021 is the current published edition (Edition 3, published 30 July 2021) and supersedes ISO 1143:2010.

Q: Is it part of a series?

A: ISO 1143 is a standalone test method within the portfolio of metallic materials testing standards and is maintained by ISO/TC 164/SC 4 (mechanical testing of metals — fatigue testing). While not a multipart series, it is complementary to other fatigue and mechanical-testing standards and statistical practices used for S–N data analysis.

Q: What are the key keywords?

A: Rotating bending, rotating bar, fatigue testing, S–N curve, metallic materials, specimen, test method, ISO 1143:2021.