Procedure for defining of the equivalent vehicle mileage and the procedure approbation results

Introduction (problem statement and relevance). Automotive manufacturers and research engineers around the world are actively engaged in improving the methods of checking the safety and durability of the vehicle, vehicle components and systems. Testing and evaluation methods play an important role in solving this problem. This article reveals the issues of using the methods for determining the equivalent mileage of a vehicle in accordance with accumulation of pseudodamage, which includes well-known methods and procedures, and also describes the results of applying the methods in practice.

The purpose of the research is development of the program of accelerated durability testing of the М1С category vehicle based on the application of the methods for determining the equivalent mileage.

Methodology and research methods. The method is based on the approaches of the material fatigue curve definition, the rule of linear damage accumulation, the theory of counting the number of loading-unloading hysteresis cycles with the rain flow method approach and subsequent comparative analysis according to values of accumulated pseudo damage.

Scientific novelty and results. The main results were obtained in the form of a program of accelerated durability testing of the М1С category vehicle, in addition, the features of using the method for determining the equivalent mileage of a vehicle based on the accumulation of pseudo-damages are disclosed.

Practical significance. The obtained result is applicable in the field of studies of the durability of the load-bearing components of the vehicle and its subsystems using the capabilities of the test base and mathematical modeling tools, in addition, the results are of practical importance in the development of accelerated durability testing of competing vehicles, similar in weight and size parameters to the studied.

1. [Program-method RTM37.001.009-74. Accelerated life tests for passenger vehicles. Ministry of Automotive Industry]. Moscow, 1975. (In Russian)

2. [Method M37.052.026-82. Forced life tests of passenger vehicles, taking into account the effects of corrosion. Scientific and Research Center for Automotive Vehicle Testing and Refinement]. 1982. (In Russian)

3. [Methodology RD.001.200-91. Field tests to assess the performance of passenger vehicles using high speeds. Scientific and Research Center for Automotive Vehicle Testing and Refinement]. 1982. (In Russian)

4. Bezverkhiy S.F., Yatsenko N.N. [Fundamentals of field testing technology and vehicle certification]. Moscow, Izdatel'stvo standartov Publ., 1996. 566 p. (In Russian)

5. Kurov B.A., Laptev S.A., Balabin I.V. [Vehicle testing]. Moscow, Mashinostroenie Publ., 1976. 208 p. (In Russian)

6. Yatsenko N.N., Burdasov E.I., Rozov R.A., Bez-verkhiy S.F., Petrovskiy D.V., Shaldykin V.P. [Resource tests of trucks at the testing ground. Part 1. Development, conditions and statistical interpretation of the results. Part 2. Fundamentals of forcing and optimal test planning. Automotive Information Research Institute]. Moscow, 1974. (In Russian)

7. Yatsenko N.N. [Forced field tests of trucks]. Moscow, Mashinostroenie Publ., 1984. 328 p. (In Russian)

8. Johannesson P., Speckert M. Guide to Load Analysis for Durability in Vehicle Engineering. Ch., Wiley, 2014. 458 p.

9. HeiBing B., Ersoy M. (Eds.) Chassis Handbook. Fundamentals, Driving Dynamics, Components, Mecha-tronics, Perspectives. 1st Edition. Vieweg+Teubner Verlag, Springer Fachmedien Wiesbaden GmbH, 2011. 591 p. ISBN 978-3-8348-0994-0.

10. [GOST 25.504-82. Strength calculation and testing. Methods of fatigue strength behaviour calculation]. 01-07-1983. 132 p. (In Russian)

11. Efremov E., Grozdanic B. Toolbox for Statistical Analysis of Load and Strength in Vehicle Engineering. Master's thesis in Applied Mechanics. Department of Mechanics and Martitime Sciences. Chalmers University of Technology. Goteborg, Sweden, 2018.

12. [GOST 25.101-83. Strength calculation and testing. Representation of random loading of machine elements and structures and statistical evaluation of results]. 01-07-1984. 25 p. (In Russian)