Research on Contact Fatigue Life Prediction of Thermally Sprayed Coating Based on Central Composite Design

doi:10.3969/j.issn.1000-1093.2017.03.020

Abstract

Abstract: The effect of service condition on contact fatigue life of supersonic plasma sprayed AT40 coating is studied by central composite design method. A multi-factor life prediction model with rotation speed, contact stress, and slip ratio is established by using response surface method based on the regression analysis principle, and the comprehension effects of the three factors on contact fatigue life are analyzed. The results show that the rolling contact fatigue life of AT40 coating has same life distribution under different service conditions. Slip ratio has the main effect on the life, and the contact stress has the secondary main effect on it,and the rotation speed has the minimum effect on it. The interactive effect between contact stress and slip ratio and the interactive effect between rotation speed and slip ratio both significantly influence the rolling contact fatigue life.The significance test results show that the response surface model can be used to characterize the relationship among the load conditions (rotation speed, contact stress, and slip ratio) and the rolling contact fatigue life of AT40 coating. Key

Key words: compositematerial, remanufacturing, contactfatigue, supersonicplasmaspray, centralcompositedesign, multi-factor

CLC Number:

TG174.442⁺.1

MA Run-bo, DONG Li-hong, WANG Hai-dou, XING Zhi-guo. Research on Contact Fatigue Life Prediction of Thermally Sprayed Coating Based on Central Composite Design[J]. Acta Armamentarii, 2017, 38(3): 561-567.

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第38卷
第3期2017 年3月兵工学报ACTA
ARMAMENTARIIVol.38No.3Mar.2017

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