Welcome to Acta Armamentarii ! Today is Share:

Acta Armamentarii ›› 2021, Vol. 42 ›› Issue (12): 2743-2752.doi: 10.3969/j.issn.1000-1093.2021.12.022

• Paper • Previous Articles     Next Articles

Prediction of Contact Fatigue Life of Thermal Sprayed Coating Based on Support Vector Machine

MA Runbo1, DONG Lihong2, WANG Haidou2   

  1. (1.Department of Fundamental Courses,Army Academy of Armored Forces,Beijing 100072,China;2.National Key Laboratory for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China)
  • Online:2022-01-15

Abstract: For the contact fatigue life prediction of thermal sprayed coatings,a series of contact fatigue tests of the plasma sprayed Al2O3-40wt% TiO2 composite coating (AT40 coating) were conducted on a multifunctional contact fatigue/wear testing machine (RM-1 tester) developed by National Key Laboratory for Remanufacturing of Army Academy of Armored Forces by using a central composite design scheme under the action of contact stress, rotation speed, coating thickness and slip ratio. The failure morphology of the coatings is observed by scanning electron microscopy. 3σ criterion is used to test the reliability of contact fatigue life test. The training set and test set are divided rationally by the combination of the golden section method and the information entropy theory. A life prediction model considering the contact stress, rotation speed, coating thickness and slip ratio is established based on the principle of support vector machine. The results show the main damage failure of the coatings is delamination failure and surface wear under the joint action of contact stress, rotation speed, coating thickness and slip ratio,the contact fatigue life obtained by using central composite design scheme is reliable, and the prediction model based on the support vector machine theory could be used to characterize the function relationship between the contact fatigue life of AT40 coating with contact stress, rotation speed, coating thickness and slip ratio. These results could provide theory support to the prediction of contact fatigue life of sprayed coatings.

Key words: thermalsprayedcoating, supportvectormachine, contactfatigue, lifeprediction, remanufacturing

CLC Number: