GB/Z 42085-2022Pneumatic fluid power - Assessment of component reliability by accelerated life testing - General guidelines and procedures (English PDF)
气动 基于加速寿命试验的元件可靠性评估 通用指南和程序
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 30, 2022
Implementation date
December 30, 2022
Scope
GB/Z 42085-2022 is the English-translated version of 气动 基于加速寿命试验的元件可靠性评估 通用指南和程序.
GB/Z 42085-2022 is the Chinese standard "Pneumatic fluid power - Assessment of component reliability by accelerated life testing - General guidelines and procedures".
Its scope clause reads: This document establishes general procedures for evaluating the reliability of pneumatic components based on accelerated life testing. This document applies to directional valves, with piston Rod cylinders, pressure regulating valves and components covered by ISO.19973 (all parts).
This document does not establish specific procedures for accelerated life testing of pneumatic components. This document gives the accelerated life test method of pneumatic components Variable conditions, and provide guidance for the development of accelerated life test methods for pneumatic components.
This document applies to the first failure of pneumatic components without maintenance. Its clauses include terms and definitions.
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Document preview — GB/Z 42085-2022
National Standard of the People's Republic of China
- ICS
- 23.100.01
- Classification
- J20
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Symbols and units of measurement
- 5 Overview of Reliability and Accelerated Life Testing
- 6 Failure mechanism and mode
- 7 Accelerated Life Test Strategy
- 8 Accelerated life test design
- 9 Trial Termination
- 10 Statistical Analysis
- 11 Evaluation of reliability characteristics from test data
- 12 Test Report
- Appendix A (informative) Stress levels for time-dependent stress models
- Appendix B (Informative) Life-Stress Model
- Appendix C (informative) Verification of Weibull slope after compromise
- Appendix D (Informative) Calculation Procedures for Censored Data
- Appendix E (informative) Examples of the use of accelerated life testing in industrial applications
- Appendix F (Informative) Palmglenn-Meiner Law
- Appendix G (Informative) Result of Cylinder Accelerated Life Test
1 Scope
This document establishes general procedures for evaluating the reliability of pneumatic components based on accelerated life testing. This document applies to directional valves, with piston
Rod cylinders, pressure regulating valves and components covered by ISO.19973 (all parts).
This document does not establish specific procedures for accelerated life testing of pneumatic components. This document gives the accelerated life test method of pneumatic components
Variable conditions, and provide guidance for the development of accelerated life test methods for pneumatic components.
This document applies to the first failure of pneumatic components without maintenance.
2 Normative references
This document has no normative references.
3 Terms and Definitions
The terms and definitions defined in ISO 5598, ISO.19973-1 and the following apply to this document.
ISO and IEC maintain terminology databases for standardization at.
3.1 BX life
The component or assembly has not been repaired after leaving the factory, and the reliability is (100-x)% of the life, or (100-x)% of the samples have not failed time.
Note. The cumulative failure rate is x%. For example, x=10, then the cumulative failure probability of B10 life is 10%.
3.2 Acceleration factor
AF The ratio of life at normal service stress levels to life at accelerated stress levels.
3.3 Accelerated life test acceleratedlifetest; ALT
A method of testing for components to fail more rapidly than under normal service conditions.
3.4 destroy limit destructlimit
The level of stress at which one or more operating characteristics of a component no longer meet requirements, or where the component is damaged and cannot recover when the stress is reduced.
Note. The damage limit is divided into the lower limit of damage and the upper limit of damage.
3.5 failure mechanism
Physical or chemical process that causes instantaneous or cumulative damage to component materials.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 46 pages — is available in the English PDF.
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