Study on Sliding Contact Problem of Coated Plate Considering Heat Source
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摘要: 基于离散卷积快速傅里叶变换(DC-FFT)，推导了三维热弹性涂层压头-涂层板接触问题的频率响应函数的半解析解，应用数值模拟方法验证了半解析解的正确性，进而探讨涂层压头及涂层板的接触应力与涂层厚度h之间的关系。结果表明：三维热弹性域下涂层厚度与表面接触压力表现为负增长趋势，随着涂层厚度增加，表面接触压力呈现先快后慢的下降规律，涂层与基体弹性模量与接触压力之间呈现一次线性递增关系，表面接触压力增加速率与涂层厚度有较大关系，涂层与基体之间泊松比、热源Q对接触压力也具有较大程度的影响。
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关键词:
- 离散卷积快速傅里叶变换(DC-FFT) /
- 频率响应函数 /
- 半解析法 /
- 涂层
Abstract: Based on the discrete convolution Fast Fourier Transform (DC-FFT), the frequency response function of three-dimensional thermo-elastic coating head and coating plate contact problem has been derived. The correctness of the semi-analytical solution was verified via numerical simulation method, and the relationship between the contact stress and the coating thickness of coating head and coating plate was further be discussed. The results showed that the contact pressure between the coating thickness and the surface showed a negative growth trendunder the three-dimensional thermo-elastic domain.The contact pressure on the surface decreased slowly after fastwith the increasing of coating thickness. The elastic modulus of the coating and the substrate has a linear increase with the contact pressure, the increase rate in the surface contact pressure has a great influence with the increasing of coating thickness, and the poisson′s ratio among the coating, the substrate and the heat source also has a great influence on the contact pressure. -
表 1 材料参数列表
序号 名称 数值 1 外载荷W 1500 N 2 基体杨氏模量 E1_s 210 GPa 3 涂层杨氏模量E1 2.1 GPa 4 基体导热系数K1_s 60.0 W/(m·K) 5 涂层导热系数K1 4.19 W/(m·K) 6 基体泊松比 μ1_s 0.3 7 涂层泊松比 μ1 0.2 8 基体热膨胀系数α1_s 2.0×10−5 9 涂层热膨胀系数α1 5.0×10−6 10 基体热扩散系数β1_s 1.523×10−5 11 涂层热扩散系数β1 3.28×10−6 
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