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GB/T 12443-2017 English PDF

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GB/T 12443-2017: Metallic materials -- Torque-controlled fatigue testing
Status: Valid

GB/T 12443: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 12443-2017English414 Add to Cart 3 days [Need to translate] Metallic materials -- Torque-controlled fatigue testing Valid GB/T 12443-2017
GB/T 12443-2007English399 Add to Cart 3 days [Need to translate] Metallic materials -- Torsional stress fatigue testing method Obsolete GB/T 12443-2007
GB/T 12443-1990English319 Add to Cart 3 days [Need to translate] Metallic materials--Torsional stress fatigue testing Obsolete GB/T 12443-1990

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Basic data

Standard ID GB/T 12443-2017 (GB/T12443-2017)
Description (Translated English) Metallic materials -- Torque-controlled fatigue testing
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H22
Classification of International Standard 77.040.10
Word Count Estimation 22,294
Date of Issue 2017-02-28
Date of Implementation 2017-11-01
Older Standard (superseded by this standard) GB/T 12443-2007
Quoted Standard ISO 554-1976
Adopted Standard ISO 1352-2011, IDT
Regulation (derived from) National Standard Announcement No. 4 of 2017
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the metal specimen at a given torque, constant amplitude, nominally by the elastic stress, does not cause stress concentration under the conditions of fatigue test. The test is usually carried out at room temperature (10 �� C to 35 �� C) under atmospheric conditions and is loaded along the longitudinal axis of the specimen. This standard is applicable to the cutting, preparation and testing of circular cross-section specimens and cross-section specimens of circular tubes. Does not include components and other special types of tests. Also does not include the constant amplitude of the displacement control of low-cycle torsional fatigue test, the failure of the week is usually only a few thousand times.

GB/T 12443-2017: Metallic materials -- Torque-controlled fatigue testing

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Metallic materials - Torque-controlled fatigue testing ICS 77.040.10 H22 National Standards of People's Republic of China Replacing GB/T 12443-2007 Metallic materials - Torque control fatigue test method (ISO 1352..2011, IDT) 2017-02-28 released 2017-11-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People 's Republic of China China National Standardization Management Committee released Directory Preface I 1 Scope 1 2 normative reference document 1 3 Terms and definitions 1 4 symbols and instructions 3 5 test principle 3 6 Test Plan 3 7 Sample shape and size 4 8 Sample Preparation 7 Equipment 9 10 Test procedure 10 11 Test Report 11 Appendix A (informative) Test results 12 Appendix B (informative) Verification of coaxiality of torsion fatigue testing machine Appendix C (informative) Measurement consistency of torsional strain (stress) 17 References 19

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 12443-2007 "Torsional fatigue test method of metallic materials", compared with GB/T 12443-2007 The technical changes are as follows. - to increase the cross-section of the tube (see chap. 1); - GB/T 3075, GB/T 7733, GB/T 10623, ISO 554 (see Chapter 2) has been removed from the normative reference document; --- The fatigue strength "τN" is used instead of the torsional fatigue limit "τD" (see 3, 9,.2007 edition 4.1.1) with cyclic times N - increase the size and definition of the dimensions of the tube section (see Chapter 4); - add Chapter 6 of the test protocol and refer to GB/T 24176 for data processing and calculation of fatigue test results (see Chapter 6); - a clear request for the finishing section of the sample processing (see 8.2.2,.2007 5.3); The accuracy requirements for the equipment torque sensor are increased from 3% to 1% and the accuracy of the temperature compensation and data recording (See 9.1.2,.2007 edition 6.1.1); - modified the handling requirements for the temperature rise of the test sample (see 10.2.2,.2007 6.2.2); - increase the calculation of the torsional stress of the circular cross-section and the cross-section of the tube (see 10.4); - Insert the contents of the original standard Chapter 7 data into Appendix A and remove the method of determining the torsional fatigue limit; (see Appendix A, 2007 edition of Chapter 7); --- Increased information Appendix B Torsional testing machine coaxiality verification requirements (see Appendix B); - Increased Information Appendix C Requirements for Torsional Strain (Stress) Measurement Consistency (see Appendix C); --- increase the reference. This standard uses the translation method equivalent to ISO 1352..2011 "metal material torque control fatigue test method". This standard has made the following editorial changes. For the sake of ease of use, add the symbols and descriptions in Chapter 4 to the consolidated list of instructions, add the table 1, follow the example number extension; Type unified number; --- in accordance with the standard chart appears in the order of Figure 1 and Figure 2, the number of interchangeable; --- removed the original ISO standard reference [4]. This standard is proposed by China Iron and Steel Industry Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). The drafting of this standard unit. Iron and Steel Research Institute, Metallurgical Industry Information Standards Institute. The drafters of this standard. Liu Tao, Gao Yifei, Dong Li. This standard replaced the previous version of the standard release. GB/T 12443-1990, GB/T 12443-2007. Metallic materials - Torque control fatigue test method

1 Scope

This standard specifies that the metal specimen at a given torque, constant amplitude, nominally by the elastic stress, does not cause stress concentration under the conditions of fatigue test. The test is usually carried out at room temperature (10 ° C to 35 ° C) under atmospheric conditions and is loaded along the longitudinal axis of the sample. This standard is applicable to the cutting, preparation and testing of circular cross-section specimens and cross-section specimens of circular tubes. Does not include components and other special types test. Also do not include the low-amplitude torsional fatigue test with constant amplitude displacement control, the failure time is usually only a few thousand times.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. ISO 554. 1976 Standard atmospheric environmental conditions and test instructions (Standardatmospheresforconditioning and/or testing-specifications

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Maximum stress maximumstress τmax The maximum algebraic value of the shear stress in the stress cycle (see Fig. 1). 3.2 Minimum stress τmin The minimum algebraic value of the shear stress in the stress cycle (see Fig. 1). 3.3 Mean stress τm The static component of the shear stress (see Figure 1). Note. the maximum shear stress and the minimum shear stress algebra and half, see (1). τm = τmax τmin (1) 3.4 Stress amplitude τa The dynamic component of the shear stress (see Figure 1). Note. the maximum shear stress and the minimum shear stress algebra difference of half, see (2). τa = τmax-τmin (2)

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