Book ChapterDOI
Analysis of Crack Growth in Compressor Blade Root Subjected to Fatigue
Muktai Thomre,K. Ramesh +1 more
- pp 109-113
TLDR
In this article, the authors used photoelasticity to find the highly stressed zone at the interface of the disc and the blade and then applied cyclic loading to the disc-blade assembly.Abstract:
In the current study, experiments are performed on the aero-engine compressor blade model which is fastened to the disc using dovetail joint. Using the technique of photoelasticity, the highly stressed zone is found to be at the interface of the disc and the blade. Cyclic loading is then applied to the disc-blade assembly. Initial experimental observations showed formation of small cracks leading to crack growth and subsequent failure. In this region, a small crack is put and then the growth of crack during cyclic loading is studied till the failure of the specimen. The variation of stress intensity factor with respect to crack length and the number of cycles is evaluated for crack perpendicular to the contact length.read more
Citations
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Journal ArticleDOI
Comprehensive investigations and simulation study on the mechanism of crack initiation and propagation of compressor blade’s tenon
TL;DR: In this article, a systematic analysis on the fracture failure of the tenon of X20Cr13 blade has been carried out, which consists of two parts: comprehensive analysis and simulation analysis.
References
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Journal ArticleDOI
An investigation of fatigue and fretting in a dovetail joint
TL;DR: In this paper, a design parameter that combines fretting damage and peak stress is proposed as a basis for the life assessment of the dovetail joints was proposed as well as a parameter for the lifetime of the disk/blade interface.
Journal ArticleDOI
Evaluation of stress field parameters in fracture mechanics by photoelasticity—Revisited
K. Ramesh,S. Gupta,A.A. Kelkar +2 more
TL;DR: In this paper, an over-deterministic least squares technique is proposed to evaluate the mixed-mode stress field parameters by the technique of photoelasticity, which leads to a very simple software where one can idependently increase the number of terms in Mode I or Mode II series depending on the specific problem requirement until the experimental fringes are correctly modelled.
Journal ArticleDOI
Fretting fatigue in dovetail blade roots: Experiment and analysis
Ramesh Rajasekaran,David Nowell +1 more
TL;DR: In this paper, a biaxial fatigue experiment is described which is capable of simulating the loading experienced by a dovetail blade root in an aircraft gas turbine and a comprehensive stress analysis of the experimental configuration has been undertaken and a semi-analytical approach has been developed to provide accurate estimates of surface tractions and subsurface stress fields.
Journal ArticleDOI
Effect of surface treatments on fretting fatigue of Ti–6Al–4V
TL;DR: In this paper, the performance of several coatings and surface treatments subjected to fretting fatigue with Ti-6Al-4V specimens and pads was investigated. And the initial results showed that the DLC coating significantly improved the fretting fatigues of the laboratory specimens.
Journal ArticleDOI
An investigation of fretting fatigue in a circular arc dovetail assembly
TL;DR: In this paper, the authors investigated the fretting fatigue of a fan blade-disk attachment in aircraft gas turbine engines, in which a sub-scaled specimen with one circular arc dovetail root at each end and its fixture were designed and tested under cyclic loading, and the stress distribution in the contact zone and its variation during loading were determined by using the finite element method.