Abstract
Based on the displacement and temperature discontinuity boundary element method, three-dimensional thermal fracture behaviors of two-dimensional hexagonal quasicrystal (QC) coating with an arbitrary interface crack are studied. First, fundamental solutions of discontinuities are derived using the general solution and Hankel transform technique, and boundary integral-differential equations are constructed at interface. Then, taken a penny-shaped interface crack dispersed by ring elements as an example, Green’s functions with discontinuities are derived on these elements. After that, stress intensity factors (SIFs) and the energy release rate (ERR) are expressed with discontinuities. Finally, effects on fracture were discussed, including coating thickness, applied loads, and material mismatch.
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