Computational lifetime prediction of hydrogen influenced lubricated rolling contact components –CoLifeHy–

受氢影响的润滑滚动接触部件的计算寿命预测“CoLifeHy”

• 批准号: 450828000
• 负责人: Dr.-Ing. Dominik Kürten
• 金额: --
• 依托单位: Geschäftsfeld Tribologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/450828000?language=en
• 关键词: Computational; lifetime; prediction; hydrogen; influenced

Steel rolling elements in bearings undergo hydrogen-assisted rolling contact fatigue (HARCF), which is a serious problem with drastic economic implications. Such bearings are used in numerous applications including wind turbines. The aim of this proposed project is to achieve quantitative lifetime predictions of bearing components undergoing HARCF damage. This will be achieved through the development of numerical simulation models based on reliable experimental analyses.Hydrogen diffusion in bearing steel is a multifaceted problem that depends on the material behavior and material handling and surface conditioning processes. The simulations planned in this project should be able to model stress-assisted hydrogen diffusion as function of hydrogen content and its effect on the mechanical response of steel, hydrogen trap density and internal stresses in the material. For this reason a comprehensive experimental program was designed to help complement the numerical simulation model. To achieve quantitative lifetime predictions, full-bearing rolling contact fatigue tests on hydrogen gas pre-charged samples will be conducted. The hydrogen content in the samples will be accurately determined through charging curves. The methods applied and developed throughout this project will enable transfer of knowledge to other applications and systems.

轴承中的钢滚动部件发生氢辅助滚动接触疲劳(HARCF)是一个严重的问题，具有严重的经济影响。这种轴承被用于包括风力涡轮机在内的许多应用中。这项拟议项目的目的是实现轴承部件遭受HARCF损坏的定量寿命预测。这将通过在可靠的实验分析的基础上开发数值模拟模型来实现。氢在轴承钢中的扩散是一个多方面的问题，取决于材料的行为以及材料的处理和表面处理过程。这个项目中计划的模拟应该能够模拟作为氢含量的函数的应力辅助氢扩散及其对钢的机械响应、氢陷阱密度和材料中的内应力的影响。为此，设计了一个全面的实验程序来帮助补充数值模拟模型。为了实现寿命的定量预测，将对氢气预充电样品进行全轴承滚动接触疲劳试验。通过充电曲线可以准确测定样品中的氢含量。在整个项目中应用和开发的方法将使知识能够转移到其他应用程序和系统。