Helping to establish failure thresholds and 服务 life limits, high cycle fatigue (HCF) testing is an integral part of our aerospace engine qualification programs. 我们独特的, world-class capabilities enable us to handle everything from small sub-components to the largest fan blades in 服务 today.

High vibrations conditions of airfoils during operation can impact the 结构 integrity of a test specimen, 为什么HCF测试必不可少. Individual metallic and future advanced material turbine blades or 段 of a bladed disk are tested in the natural resonance frequency range until crack initiation. Our equipment allows us to run a very high number of cycles in a short amount of time, 模拟组件的使用寿命. Our HCF testing 服务 portfolio also includes the ability to carry out strain gauge 校准 在仪表机翼上.

 

进行高周疲劳试验(HCF)

在HCF测试期间, individual turbine blades (or blade samples) are cycled at an extremely high rate to mimic their natural operating frequency. 一旦开裂开始发生, 记录故障周期计数, and the product is analyzed for performance characteristics and durability criteria.

We understand the unique environments and challenges that airfoils and aerospace engine components face. To better support your testing program, we offer a range of options for 高周疲劳试验, 包括在高达1200摄氏度的温度下进行测试, 样品开槽和加工服务, 夹具和夹具设计, 以及专业的测试方法.

 

High Cycle Fatigue 测试 for 航空航天 Engine Qualification

We support a range of high cycle fatigue test methods, including:

  • 压电
  • 摘要
  • 常数Airjet
  • 切碎的空气
  • 声波疲劳(热/冷)

For more information about out 高周疲劳试验 programs, or to request a quote, 立即im体育APP.  

Aeroengine-Fan-Blades-测试
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切碎空气测试

Exciting high frequencies of larger and relatively stiff specimens require more specialist testing methods, 特别是对于更高的模式. 要做到这一点, we have put dedicated chopped air testing facilities in place, 使用脉冲气流进行气动激励. This world-class and unique capability enables im体育APP to handle everything from the smallest to the very largest aero-engine FAN Blades in 服务 today.

热高周疲劳HCF测试服务
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热高周疲劳(HCF)试验

用于分析使用寿命极限, individual turbine blades or 段 of a bladed disk are tested in the natural resonance frequency range until a crack occurs. 也, turbine blades are subjected to a realistic temperature load up to 1200°C to take, 例如, 考虑蠕变过程.

HCF试验中翼型夹紧条件的评价
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翼型夹紧和持有块设计

取决于翼型的类型, different clamping conditions can occur which need to be considered for HCF testing in order to recall these influences on the system behavior and to chose the proper excitation method. im体育APP's experts have extensive experience and can test in all possible conditions, 包括免费, fixed-free, 和惯性.

Not less important to achieve stable testing conditions and representative results is the know-how to design holding blocks that are an accurate counterpart to the airfoils' root but still flexible enough to allow assembly and adjusting the clamping. 超过15个.成功测试了000个翼型, im体育APP developed best practices in this discipline to ensure stable test and representative failure conditions.

Holography-Modeshape-Analysis-Services
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全息术(频率检查和模态分析)

确定组件的行为, 在激励后的响应特性方面, is essential to state if it can meet operational requirements. 通过这个具体的分析, eigenvalues and damping factors can be obtained and used in advance of HCF testing to identify relevant mode shapes at various frequencies, nodal patterns and/or validate finite element method (FEM) simulations.

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Advanced graphical analysis systems based on a touchless sensor system (EPSI & SLDV) detect the smallest deformations via a sine-step procedure, which helps to identify and interpret these in a standardized way correctly and quickly. These results are used by our experienced engineers to run following fatigue tests properly, 以适当的方式, 和期望的测试模式.

热漆温度测量

Thermal Paints are used to provide full surface temperature measurement within concealed areas. They present visual evidence of peak temperatures and isothermal distributions, with temperatures indicated by colour changes or surface texture, 发生在一种或多种不同温度下的.

The paints provide temperature distributions for component surfaces that are difficult to obtain such as aero engine turbine blades, 叶片, 段, 燃烧器, 或在恶劣环境下旋转部件. 

Rolls-Royce have been using thermal paints for over 80 years There are a range of paints and 服务 available that include:

  • 测试计划的指导和建议
  • 涂料的应用
  • 测试设计与支持
  • 测试后分析
  • 结果可以通过高分辨率的照片显示, 三维模型, 或3D和2D温度嵌入图像
  • Technical report detailing test specification, results and conclusions

im体育APP的专家团队了解更多信息.

 
预损伤翼型部件HCF疲劳试验
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开槽

How pre-damaged components respond during fatigue is very important when appraising their operational resilience. Traditionally this is tested using manual hammer impact techniques. 我们的专家已经建立了一个新的, more modern method that enables reproducibility and more precise impacts (e.g., exact location, notching depth, and angle) to take place. 这使我们能够比较多组测试结果. 

近190年来一直如此

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除了振动测试, im体育APP provides a range of dynamics testing including acceleration, 冲击, 下降, 结构, 疲劳和旋转载荷模拟.

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Find out about im体育APPs extensive range of High Cycle Fatigue (HCF) testing 服务 for engine airfoils.

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