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Influence of temperature dependent viscoelastic material properties of thermoplastic composite materials on the tribological behaviour

热塑性复合材料的温度依赖性粘弹性材料特性对摩擦学行为的影响

基本信息

批准号：
249374721
负责人：
Professor Dr.-Ing. Alois K. Schlarb
金额：
--
依托单位：
Lehrstuhl für Verbundwerkstoffe (CCE)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2013
资助国家：
德国
起止时间：
2012-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/249374721?language=en
关键词：
Influence temperature dependent viscoelastic material

项目摘要

The characteristics of a tribosystem are influenced by various factors; the mechanical properties of sample and counterbody play an important role. Samples made of a thermoplastic material usually show viscoelastic behaviour. Viscoelasticity mainly has an effect if load lasts for a longer time and leads to a higher temperature sensitivity of the material. Tribological loads lead to a permanent stress in the material, and the temperature is increased by friction. Therefore the aim of the project is to investigate the influence of the viscoelastic properties on the tribological behaviour systematically. For that purpose reinforced PEEK and POM will be analyzed; on the one hand the viscoelastic behavior will be characterized in detail and on the other hand the friction and wear behaviour will be examined. The results obtained will then be transferred into FE models. First, separate models for the thermo-mechanical answer to normal force and friction as well as wear will be created. Both models will then be merged into one, which represents the tribological behaviour taking into account the temperature changes on the basis of a viscoelastic material model. Finally the results of experiments and simulations are correlated with each other. The change of tribological and mechanical properties in time and place are evaluated in order to draw conclusions about the loads in the sample and thus about the resulting wear.This allows a deeper understanding of the relationship between viscoelasticity and tribological behaviour.

摩擦系统的特性受多种因素的影响，其中试样和配对体的力学性能起着重要的作用。由热塑性材料制成的样品通常表现出粘弹性行为。粘弹性主要在载荷持续较长时间时起作用，并导致材料的温度敏感性较高。摩擦负载导致材料中的永久应力，并且温度因摩擦而升高。因此，该项目的目的是系统地研究粘弹性对摩擦学行为的影响。为此，将对增强PEEK和POM进行分析;一方面将详细表征粘弹性行为，另一方面将检查摩擦和磨损行为。然后将获得的结果转换为FE模型。首先，将创建针对法向力和摩擦以及磨损的热机械响应的单独模型。然后，两个模型将被合并为一个模型，该模型基于粘弹性材料模型考虑温度变化来表示摩擦学行为。最后将实验结果与仿真结果进行了对比。通过对摩擦学和机械性能随时间和地点的变化进行评估，可以得出关于样品中的载荷以及由此产生的磨损的结论，从而更深入地了解粘弹性和摩擦学行为之间的关系。