Thermomechanical contact of rubber‐like solids on rough surfaces
Thermomechanical contact of rubber‐like solids on rough surfaces
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橡胶类固体在粗糙表面上的热机械接触
DOI：
10.1002/pamm.201410103
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
U. Nackenhorst
中科院分区：
文献类型：
--
作者：
R. Beyer;U. Nackenhorst
轮胎与粗糙路面之间的接触的特征在于胎面橡胶在高频率下的大的局部变形，这是由于胎面花纹块被最高粗糙度穿透而导致的。这些变形会影响轮胎的整体性能，包括滚动阻力、可持续性以及噪声辐射。由于橡胶化合物的机械行为强烈地依赖于速率，这些变形导致局部能量耗散。诱导的温度升高影响橡胶的机械性能。力学和热行为的相互依赖性的描述需要一个耦合问题的解决方案。在这方面的贡献是胎面胶料建模与不可压缩的，热粘弹性本构关系在有限变形的制度，考虑到内部摩擦和Gough-焦耳效应。热力耦合问题采用等温算子分裂格式处理。在这里，机械子问题在第一阶段在恒定温度下求解。在此阶段，处理胎面花纹块与道路的粗糙表面接触问题。路面是测量的真实的道路纹理的表示，其已经通过应用快速傅立叶变换而获得。在随后的热阶段，热传导问题得到解决。这里，块状材料内的机械耗散充当热源。所开发的算法应用于详细的研究发生在轮胎-道路接触界面的热机械效应。（© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
The contact between tires and the rough road surface is characterized by large local deformations of the tread rubber at high frequency, which result from the penetration of the tread blocks by the highest asperities. These deformations have an influence on the overall performance of tires regarding rolling resistance, sustainability as well as noise radiation. As the mechanical behavior of rubber compounds is strongly rate dependent these deformations cause local energy dissipation. The induced temperature increase affects the mechanical properties of the rubber. A description of the interdependence of mechanical and thermal behavior requires the solution of a coupled problem.In this contribution the tread rubber compound is modeled with an incompressible, thermo‐visco‐elastic constitutive law in the regime of finite deformations taking into account internal friction and the Gough‐Joule effect. The thermomechanical coupling is treated with the isothermal operator split scheme. Here, the mechanical subproblem is solved in a first phase at a constant temperature. Within this phase, the rough surface contact problem of the tread block with the road is treated. The road surface is a representation of a measured real road texture, which has been obtained by applying the fast Fourier transform. In the subsequent thermal phase the heat conduction problem is solved. Here, the mechanical dissipation within the bulk material acts as a heat source. The developed algorithm is applied for a detailed study on the thermomechanical effects occurring in the tire‐road contact interface. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)