Development and Comparative Evaluation of Reduced-scale Krauss Friction Tester for Automobile Friction Materials

doi:10.3901/JME.2020.21.158

Abstract

Abstract: In order to improve the simulation of the sample test conditions, reduce the test cost, and improve the test efficiency. Taking the Krauss tester as a prototype, the basic parameters of the reduced-scale Krauss tester were obtained according to the similarity principle and the dimensional analysis method. The reduced-scale Krauss tester had been developed. The same batch of automobile brake linings have been rigorously evaluated on two Krauss testers following PVW-3212 procedure and have been discussed these parameters such as friction coefficient, experimental temperature and test cycle. The results show that the average friction coefficient is relatively close, the maximum and minimum values of the friction coefficient appear at the same stage and the same braking sequence, and the average temperature of the whole process has good linear correlation during the entire test. When the same PVW-3212 test procedure is carried out, the pressure response of the reduced-scale Krauss tester is faster than that of the full-scale Krauss tester in the initial braking and braking release stages, so the reduced-scale Krauss tester brake completion time is about 100 ms earlier, and the test cost is approximately 29.67% of the full-scale Krauss tester. The reduced-scale Krauss tester has good consistency and comparability with the full-scale Krauss tester, which proves the reliability of the reduced-scale Krauss tester and also tries to provide a new test device for the friction material test.

Key words: friction material, similarity theory, Krauss tester, comparative test, friction and wear

CLC Number:

TH117

WANG Zhenyu, WANG Jie, WANG Lining, PETER K, MA Yunhai, WANG Tieshan. Development and Comparative Evaluation of Reduced-scale Krauss Friction Tester for Automobile Friction Materials[J]. Journal of Mechanical Engineering, 2020, 56(21): 158-167.

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