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首页> 外文OA文献 >Zum Schwingfestigkeitsverhalten von Gusseisenwerkstoffen unter einachsiger und mehrachsiger Beanspruchung am Beispiel von EN-GJV-450
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Zum Schwingfestigkeitsverhalten von Gusseisenwerkstoffen unter einachsiger und mehrachsiger Beanspruchung am Beispiel von EN-GJV-450

机译：以EN-GJV-450为例，说明铸铁材料在单轴和多轴载荷下的抗振性能

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摘要

In engine design, the requirements for higher specific power in combination with low-polluting, economic and lightweight power train concepts are increasing. Highly charged diesel engines achieve nowadays a specific performance of 60-65 kW/l and a specific torque of 200 Nm/l. These specific performance values are expected to experience will a considerable increase in the next diesel engine generations. Due to these requirements the material conventionally applied in the manufacture of internal combustion engines meet their limits regarding thermal and mechanical properties. Compacted Graphite Iron (CGI) can be presented as a reasonable solution in this case. Its mechanical properties outperformer the mechanical properties of ordinary grey iron. CGI offers also acceptable damping characteristics and satisfactory heat conductivity. The fatigue behavior of CGI has not enough been investigated yet. The optimal utilization of the material potential can only be realized if the material behavior under cyclical loading conditions is better known. In the present research project, the fatigue behavior of Compacted Graphite Iron was investigated under uniaxial and multiaxial conditions by example of the CGI grade EN-GJV-450 and was compared with a fatigue failure hypothesis. A method for the estimation of the fully reversed axial fatigue strength of cast iron materials was developed by using image analysis for the evaluation of the graphite morphology and is also presented in this work.
机译：在发动机设计中，对更高的比功率以及低污染，经济和轻便的动力总成概念的需求正在增加。如今，高负荷柴油发动机的性能达到60-65 kW / l，扭矩达到200 Nm / l。预期这些特定的性能值将在下一代柴油发动机中得到显着提高。由于这些要求，常规地用于制造内燃机的材料满足了它们关于热和机械性能的限制。在这种情况下，可以提出压实石墨铁（CGI）作为合理的解决方案。其机械性能优于普通灰铁的机械性能。 CGI还提供了可接受的阻尼特性和令人满意的导热性。 CGI的疲劳行为尚未得到足够的研究。只有更好地了解周期性加载条件下的材料行为，才能实现材料潜力的最佳利用。在本研究项目中，以CGI级EN-GJV-450为例研究了压缩石墨铁在单轴和多轴条件下的疲劳行为，并与疲劳破坏假设进行了比较。通过图像分析开发了一种估计铸铁材料完全反向轴向疲劳强度的方法，以评估石墨的形貌，并在这项工作中进行了介绍。

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    Rausch Thiago;

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  • 年度 2011
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