Additive manufacture for railway track component life extension with premium laser-clad coatings

利用优质激光熔覆涂层进行增材制造，延长铁路轨道部件的使用寿命

• 批准号: 1949426
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1949426
• 关键词: Additive; manufacture; railway; track; component

This is an exciting PhD research opportunity combining research at University of Sheffield with experience at Network Rail. It focuses on the mechanics and materials of the rail-wheel contact, at which high train loads routinely take rail materials to extreme stress levels. The research will develop understanding of how a large-scale additive manufacturing method using laser-clad coatings on basic steel track components can extend their life. Success in this area will mean fewer line closures for maintenance and reduced cost, thereby having a big impact on how the rail network runs. Project detailAdditive approaches to creating graduated change in materials and mechanical properties through a component are novel in rail track manufacture (rail, insulated block joints, switches & crossings). Research challenges include understanding tolerable material imperfections through contact stress and fracture mechanics assessment, and ensuring wear, friction and plasticity of the developed surfaces meet the demands placed on them. Research will focus particularly on modelling (e.g. finite or boundary element techniques), combining this with experimental work at small and full-scale. The research lies in the areas of contact mechanics, fracture mechanics and tribology. Alongside this the PhD includes the opportunity to spend periods with Network Rail getting a real understanding of the opportunities for improvement to the rail-wheel system, and to see how your research can be applied

这是一个令人兴奋的博士研究机会，结合了谢菲尔德大学的研究和网络铁路的经验。它侧重于轨道车轮接触的力学和材料，在这种情况下，高列车负荷通常会使轨道材料达到极端应力水平。这项研究将有助于了解在基本的钢制轨道部件上使用激光熔覆涂层的大规模增材制造方法如何延长其寿命。这一领域的成功将意味着更少的线路关闭维护和降低成本，从而对铁路网络的运行产生重大影响。项目详情通过一个部件来逐步改变材料和机械性能的增材方法在铁路轨道制造（钢轨、绝缘块接头、道岔和道口）中是新颖的。研究挑战包括通过接触应力和断裂力学评估了解可容忍的材料缺陷，并确保开发的表面的磨损，摩擦和塑性满足对它们的要求。研究将特别侧重于建模（例如有限或边界元技术），并将其与小规模和全尺寸的实验工作相结合。其研究领域包括接触力学、断裂力学和摩擦学。除此之外，博士学位还包括有机会与Network Rail一起度过一段时间，以真实的了解改进铁路车轮系统的机会，并了解如何应用您的研究