thermo-mechanical analysis of stationary rolling tires

静止滚动轮胎的热机械分析

基本信息

批准号：
189716259
负责人：
Professor Dr.-Ing. Udo Nackenhorst
金额：
--
依托单位：
Institut für Baumechanik und Numerische Mechanik (IBNM)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/189716259?language=en
关键词：
thermo mechanical analysis stationary rolling

项目摘要

The thermo-mechanical tire model developed during the first funding period shall be extended by a detailed model for the hysteretic loss which results from the local asperity contact of the tread rubber with the rough surface. These research activities are motivated by the hypothesis that the dissipative effects caused by the asperity contact of the soft inelastic tread rubber with the rough road surface causes a mentionable contribution to the total rolling loss of tires. In a first working package finite element models for detailed studies of the contact of soft rubber with rough road surfaces will be developed. The road is described as rigid body for simplicity; the rough-ness will be modeled via a spectral description. For the tread rubber the sophisticated thermo-mechanical inelastic constitutive models derived in the first funding period will be assumed. The ther-mo-mechanical response will be studied under tire typical operational conditions. Based on these detailed studies at the mesoscopic length-scale a constitutive contact law for macro-scopic simulations shall be derived. A surface free energy density function will be developed from which the surface traction and the related tangent operators can be derived. Motivated by the physics of the asperity contact we will not follow the classical concept that splits normal and tangential contact traction a priory. In addition a dissipation function will be developed, from which the global heat production due to the inelastic effects in the asperity contact can be derived. The parameters for these functions, e.g. road surface texture characteristics and road temperature, will be identified from the detailed contact investigations performed in step one. In a third working package the developed constitutive contact laws will be implemented for a macro-scopic simulation of stationary rolling tires. Goal of this research is to provide a powerful simulation technique which enables studies on the contribution of different assembly parts to the total rolling loss of stationary rolling tires.

在第一个融资期间开发的热机械轮胎模型应通过滞后损失的详细模型扩展，该模型是由胎面橡胶与粗糙表面的局部覆盖层接触产生的。这些研究活动是由以下假设的动机：柔软的非弹性胎面橡胶与粗糙的道路表面的悬垂接触造成的耗散作用会对轮胎的总滚动损失产生可提及的贡献。在第一个工作包装有限元模型中，将开发有关软橡胶与粗糙路面的接触的详细研究。这条道路被描述为刚性的身体，以简单起见。粗糙度将通过光谱描述进行建模。对于胎面橡胶，将假定在第一个融资期间得出的复杂的热机电非弹性本构模型。将在轮胎典型的操作条件下研究其他机械反应。基于这些详细的研究，应得出介质长度尺度上的A构型接触定律，以进行宏观模拟。将开发出表面自由能密度函数，可以从该函数中得出表面牵引力和相关的切线操作员。受覆盖性接触的物理学的激励，我们将不遵循分裂正常和切向接触牵引力的经典概念。另外，还将开发出耗散函数，从中可以得出由于抗浓度接触中的非弹性效应而引起的全球热量产生。这些功能的参数，例如路面纹理特征和道路温度将从第一步中进行的详细接触调查中鉴定出来。在第三个工作包中，将实施开发的构型联系法律，以进行固定滚动轮胎的宏观模拟。这项研究的目标是提供强大的仿真技术，该技术能够研究不同装配部件对固定滚动轮胎的总滚动损失的贡献。