Frictionally excited thermoelastic dynamic instability of functionally graded materials
- 32 Downloads
The perturbation method is applied to investigate the frictionally excited thermoelastic dynamic instability (TEDI) of a functionally graded material (FGM) coating in half-plane sliding against a homogeneous half-plane. We assume that the thermoelastic properties of the FGM vary exponentially with thickness. We also examine the effects of the gradient index, sliding speed, and friction coefficient on the TEDI for various material combinations. The transverse normal stress for two different coating structures is calculated. Furthermore, the frictional sliding stability of two different coating structures is analyzed. The obtained results show that use of FGM coatings can improve the TEDI of this sliding system and reduce the possibility of interfacial failure by controlling the interfacial tensile stress.
KeywordsThermoelastic dynamic instability Frictional heat Functionally graded materials Stress analysis
The work was supported by the National Natural Science Foundation of China (Grants 11502089 and 11725207).
- 1.Suresh, S., Mortensen, A.: Fundamentals of functionally graded materials: processing and thermomechanical behavior of graded metals and metal-ceramic composites. IOM Communications Ltd., London (1998)Google Scholar
- 2.Guler, M.A.: Contact mechanics of FGM coatings. Ph. D. Thesis, Lehigh University (2001)Google Scholar
- 24.Chen, P.J., Chen, S.H.: Thermo-mechanical contact behavior of a finite graded layer under a sliding punch with heat generation. Int. J. Solids Struct. 50, 1109–1119 (2013)Google Scholar