Standard No.:	GB/T 16947-2009
English Name:	Helical spring fatigue testing standard
Chinese Name:	螺旋弹簧疲劳试验规范
Chinese Classification:	J26    Spring
Professional Classification:	GB    National Standard
Issued by:	AQSIQ; SAC
Issued on:	2009-3-16
Implemented on:	2009-11-1
Status:	valid
Superseding:	GB/T 16947-1997 Helical springs fatigue testing STANDARD
Language:	English
File Format:	PDF
Word Count:	7000 words
Price(USD):	170.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the fatigue testing standard for helical springs under variable load. This standard is applicable to fatigue life verification and reliability evaluation of helical compression and tension springs (hereinafter referred to as springs), and it can be used as a reference for other spring products under variable load. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard, however parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies. GB/T 23935 Design of cylindrical helical springs GB/T 1805 Nomenclature of springs 3 Terms, definitions and symbols For the basic terms of springs, those specified in GB/T 1805 shall apply. See Figure 1 and Table 1 for the terms, definitions, symbols and units related to fatigue testing.

Foreword i 1 Scope 2 Normative references 3 Terms, definitions and symbols 4 Testing requirements 5 Specimen spring 6 Testing conditions 7 Testing procedure 8 Testing data processing and result evaluation Annex A (Informative) Reference table for number of cyclic action Annex B (Informative) Table for estimation and calculation of reliability R Annex C (Informative) Data record of fatigue testing