GB/T 12160-2002

📋 Scope / 适用范围 ai_extracted

This standard specifies the static calibration method for extensometers used in uniaxial testing. The term "extensometer" refers to a displacement measuring device and includes the system for indicating or recording such displacement. Note: This standard currently does not provide detailed guidance for the calibration of the following types of extensometers: - Variable gauge length type; - Non-contact type; - Plane strain measurement type. For the calibration of these types of extensometers, special consideration should be given.

📝 Foreword / 前言 ai_extracted

This standard is identical to ISO 9513:1999 "Calibration of extensometers used in uniaxial testing of metallic materials" (English second edition), including its Technical Corrigendum 1:2000. This standard is an identical translation of ISO 9513:1999. The text structure and technical content are completely identical to the international standard. However, the following minor editorial modifications have been made in accordance with the relevant regulations for standard compilation in China: - To achieve harmonization and consistency with related standards, the leading element of the standard title has been deleted. - "This standard" is used to replace "This International Standard". - The decimal point symbol "." commonly used in Chinese is used to replace the decimal point symbol "," used in English. - The Foreword of the international standard has been deleted. - The "Bibliography" attached to ISO 9513:1999 (its content is inappropriate for inclusion in this standard) and the last sentence of the note in Clause 1 that corresponds to it have been deleted. - Relevant tables and formulas have been modified according to Chinese expression habits. - Table 2, Figure B.1, and Figure B.2 have been corrected according to the Technical Corrigendum of ISO 9513:1999. These modifications are identified by vertical double lines (||) in the margins of the affected tables and figures. This standard replaces GB/T 12160-1990 "Method for calibration and classification of extensometers". Concurrently, the machinery industry standard JB/T 8289-1999 "Method for calibration and classification of extensometers" (this industry standard number was approved by the former Ministry of Machinery Industry after GB/T 12160-1990 was adjusted to an industry standard during the national standard cleanup and rectification process) is abolished. Compared with GB/T 12160-1990, the main changes in this standard are as follows: - A table of contents and a foreword have been added. - The text structure has been adjusted according to ISO 9513:1999, and the technical content has also changed. - The terms, extensometer calibration coefficient, and the calculation of strain indication error and displacement indication relative error (Clauses 2, 6, and 7 of the 1990 edition) have been deleted. - The informative appendix (Appendix A of the 1990 edition) has been deleted. - Symbols and definitions have been added (Clause 2 of this edition). - The original standard classified extensometers based on the maximum permissible strain indication error. This standard, consistent with ISO 9513:1999, classifies them based on the maximum permissible values of gauge length relative error, resolution, and system relative error (Clause 5 of the 1990 edition; Clause 6 of this edition). - Informative appendices have been added (Appendices A and B of this edition). The national standard related to this standard is GB/T 228-2002 "Metallic materials - Tensile testing at ambient temperature", and it is referenced by that standard. Appendices A and B of this standard are informative appendices. This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Testing Machines. The responsible drafting organization for this standard is Changchun Testing Machine Research Institute. The participating drafting organizations for this standard are the Central Iron and Steel Research Institute and Jinan Testing Machine Group Co., Ltd. The main drafters of this standard are Liang Enchao, Wang Chunhua, and Tao Liying. The previous versions of the standard replaced by this standard are: GB/T 12160-1990 (JB/T 8289-1999) GB/T 12160-2002/ISO 9513:1999 Calibration of extensometers used in uniaxial testing

📚 References & Relations / 引用与关联

🔗 Related Standards / 同类标准