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A method for predicting fretting fatigue life of a nickel-base single crystal alloy turbine blade tenon

A technology for fretting fatigue and turbine blades, applied in special data processing applications, instruments, electrical digital data processing, etc. Solve problems such as fretting fatigue damage and failure of crystal superalloys, and achieve the effect of improving accuracy

Active Publication Date: 2019-03-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current fretting fatigue life prediction method cannot characterize the failure characteristics of fretting fatigue damage in nickel-based single crystal superalloys, which leads to the inability to accurately predict the fretting fatigue life of nickel-based single crystal alloy turbine blade tenons

Method used

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  • A method for predicting fretting fatigue life of a nickel-base single crystal alloy turbine blade tenon
  • A method for predicting fretting fatigue life of a nickel-base single crystal alloy turbine blade tenon
  • A method for predicting fretting fatigue life of a nickel-base single crystal alloy turbine blade tenon

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Embodiment Construction

[0048]Example embodiments will now be described more fully with reference to the standard drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details being omitted, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known technical solutions hav...

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Abstract

A method for predicting fretting fatigue life of a nickel-base single crystal alloy turbine blade tenon includes establishing a fretting fatigue contact analysis model of that nickel-base single crystal alloy turbine blade tenon; calculating the model under the given working condition and obtain the analysis parameters, which include shear stress, tangential stress and relative slip distance at different positions of the contact surface; determining the shear stress damage factor at different positions of the contact surface of the model under a given working condition; the cumulative dissipative energy damage factors at different positions of the contact surface of the model are determined according to the given operating conditions and analysis parameters. According to the shear stress damage factor and cumulative energy dissipation damage factor, the fretting fatigue comprehensive damage factor is determined, and the fretting fatigue life of nickel-based single crystal alloy turbineblade tenon is obtained. The fretting fatigue life prediction method of the nickel-based single crystal alloy turbine blade tenon can accurately predict the fretting fatigue life of the nickel-basedsingle crystal alloy turbine blade tenon.

Description

technical field [0001] The disclosure relates to the technical field of structural design and strength, in particular to a method for predicting the fretting fatigue life of a nickel-based single crystal alloy turbine blade tenon. Background technique [0002] Nickel-based single crystal alloys have good high temperature resistance, creep resistance, oxidation resistance and thermomechanical fatigue properties, so they are widely used in aeroengines and gas turbine blades. Turbine blades are usually connected to the turbine disk by a tenon connection structure. Under the action of periodic centrifugal loads, etc., the tenon structure of the turbine blade is prone to fretting fatigue, and the harsh environment of high temperature and high speed of the turbine makes the nickel-based single crystal tenon structure The problem of fretting fatigue is more prominent. Therefore, it is of great significance for the design of aero-engines and gas turbines to accurately predict the f...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F2119/06G06F30/20
Inventor 李磊孙守义岳珠峰杨未柱何锟卫靖澜曾延
Owner NORTHWESTERN POLYTECHNICAL UNIV
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