Steel wire ropes – Creep testing method
1 Scope
This document specifies the principles, test equipment, specimens, test procedures, test data processing, and test reports for the creep testing of steel wire ropes.
This document is applicable to the determination of creep performance of steel wire ropes under constant load.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 8358 Steel wire ropes - Determination of breaking force
GB/T 12160 Metallic materials - Calibration of extensometers systems used in uniaxial testing
GB/T 16825.1 Metallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and verification of the force-measuring system
GB/T 24191 Steel wire ropes - Determination of the actual modulus of elasticity
3 Terms and definitions
For the purposes of this document, the terms and definitions specified in GB/T 8358 and GB/T 24191 and the following apply.
3.1
creep for steel wire ropes
phenomenon of elongation of steel wire rope length with time after eliminating time-independent inelastic deformation under constant load and temperature conditions
3.2
steel wire ropes percentage elongation
At
percentage of the ratio between the increment of the reference length of a steel wire rope at any time and the original reference length under constant load and temperature conditions
4 Symbols and interpretations
For the purposes of this document, the symbols and interpretations listed in Table 1 apply.
5 Principle
6 Test equipment
7 Specimen
8 Test procedure
9 Test data processing
10 Test report
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and interpretations
5 Principle
6 Test equipment
7 Specimen
8 Test procedure
9 Test data processing
10 Test report
