Path: Home > GB/T > Page12 > GB/T 21957-2008

Price & Delivery

US$189.00 · In stock · Download in 9 seconds
GB/T 21957-2008: The fatigue-life testing method of the axle shaft and drive shaft on the test stand，wheeled agricultural tractor
Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Status: Valid

Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 21957-2008	English	189	Add to Cart	3 days [Need to translate]	The fatigue-life testing method of the axle shaft and drive shaft on the test stand，wheeled agricultural tractor

GB/T 21957-2008: The fatigue-life testing method of the axle shaft and drive shaft on the test stand，wheeled agricultural tractor

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
The fatigue-life testing method of the axle shaft and drive shaft on the test stand, wheeled agricultural tractor ICS 65.060.10 T63 National Standards of People's Republic of China Agricultural wheeled tractors and axle shaft Bench fatigue test method Posted 2008-06-03 2009-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The Standard Appendix A, Appendix B is an informative annex. The standard proposed by China Machinery Industry Federation. This standard by the National Standardization Technical Committee of the tractor. This standard was drafted. National Tractor Quality Supervision and Inspection Center. The main drafters of this standard. Jin Xiping, Wang wind and rain, Zhen. Agricultural wheeled tractors and axle shaft Bench fatigue test method

1 Scope

This standard specifies the Agricultural wheeled tractors and axle shaft fatigue life test bench method. This standard applies to agricultural wheeled tractor axle and drive shaft. 2 terms, definitions and symbols 2.1 Terms and Definitions When the sample surface cracking, displacement rate of change of the sample dynamic angle is greater than or equal to 10% or dynamic angular displacement of the sample carrying capacity Ming Significantly decreased life testing machine that does not work when. 2.2 Symbol Mj --- axle or drive shaft nominal torque, the unit is the Newton meter (N · m); Mw --- axle and drive shaft bear design moments, units of Newton meter (N · m); Wr --- drive axle load, in Newtons (N);  --- ground adhesion factor, taking  = 0.65; λ --- moment to torque conversion factor, taking λ = 1.15.

3 test purposes

In the following cases should be verified axle and drive shaft fatigue life. a) a new design or improve the design; b) changes in materials or workmanship; c) increasing the load capacity or extend the service life; d) the use of early detection of damage; e) After the plant production or long-term shutdown, resume production.

4 Number of test pieces

Specimen should manufacturers qualified products at random, the number of test specimens shall be not less than five.

5 Test methods

5.1 Test load Pulsating test using the cyclic loading, the relationship between load and time are shown in Figure 1. ...