The thermoelastic contact problem of one-dimensional hexagonal quasicrystal layer with interfacial imperfections

The coupled thermo-mechanical contact between a rotating sphere made of one-dimensional hexagonal quasicrystal materials, and a layer-substrate system with interfacial imperfections, is investigated by applying the discrete convolution-fast Fourier transform (DC-FFT) algorithm. The effects of dislocation-like interface defects, friction coefficient, coating thickness and rotation velocity on the thermoelastic field are discussed. The effect of vertical imperfection on the phason normal displacement is opposite to that of horizontal imperfections. The discontinuity of the horizontal displacement plays a limiting role on the effect of the vertical discontinuities on the phason normal stress. The peak value of the normal phason displacement decreases, and the peak point obviously moves in the negative direction of the x -axis with the increase of friction coefficient, while the change of the phason normal stress is negligible. The numerical results may provide theoretical help for the design of quasicrystal coatings.