Identification of Fatigue Cracks on the Basis of Measurable Changes in System Dynamics

Owsiński, Robert; Niesłony, Adam

doi:10.1515/scjme-2017-0020

Cited by 7 publications

(5 citation statements)

References 12 publications

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“…Fatigue is phenomenon which occurs when there is load acting on something continuously, in which stress developed will increase to failure very quickly. There are different measures in the fatigue, they are life of the component, damage on the component, safety factor to be applied on it and bi-axiality indication [9] From the Table 3, we can confirm that the increase in frequency increases the deformation of the component as well. Looking at the stress developed, a higher factor of safety must have been considered for the design.…”

Section: Fatigue Analysismentioning

confidence: 73%

Optimization of Sluice Gate under Fatigue Life Subjected for Forced Vibration by Fluid Flow

Handral

Kadam

Pawar

et al. 2018

Strojnícky Časopis - Journal of Mechanical Engineering

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A ‘Sluice’ is a water-flow control gate works with sliding. So, it’s a mill race, flume or a penstock, channelling water towards a water mill, traditionally a wood or metal barrier sliding in grooves that are set in the sides of the waterway. They are used in wastewater treatment of plants, and control water level and flow in watermills. However, Sluices are subjected to temperature, environment that supports corrosion, impact loading and so on. Many of those equipments operate during long time in industries and reliability is one of the most important aspects of work, there arose questions of reliability on those structural elements, because the people working nearby will be in danger due to involvement of heavy loaded parts during various possible working states. Considering these factors the gates used in industries are subjected for “Fatigue Analysis”, but the normal V-channel gates which undergo corrosion, wear and continuous stress due to water flow which leads to fatigue failure, loss of material and wastage of water are still in need of this analysis. Hence there is need of an analysis to optimize the gate in terms of material, shape, and size. This paper helps to determine the fatigue strength, wear life of Sluice gate in “V-Channels”. So, by using the ANSYS Workbench software, sluice gate is analysed for fatigue life under fluid flow.

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Section: Fatigue Analysismentioning

confidence: 73%

Optimization of Sluice Gate under Fatigue Life Subjected for Forced Vibration by Fluid Flow

Handral

Kadam

Pawar

et al. 2018

Strojnícky Časopis - Journal of Mechanical Engineering

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“…The compressor would be able to run at higher speed to meet the pressure requirements. A higher interference fit may induce defects in the form of fatigue cracks occurring in load-carrying section and affects the ability of a structural component to transfer the required loads, which may result in structural component damage [12].…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of Tapered Interference Fit between Impeller and Shaft in Turbo Machines

Vishwakarma¹,

Renuke

Phalle³

2018

Strojnícky Časopis - Journal of Mechanical Engineering

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In Turbo machines, there are many components which are provided with interference to transmit torque and to maintain contact between them. There are transient scenarios where impeller and shaft lose interference and limits the speed of the impeller. In this paper, a case study on centrifugal compressor has been presented to see the effect of taper pairing of shaft with impeller. When the centrifugal compressor starts then a transient condition is dominant wherein the impeller of the centrifugal compressor gains higher temperature quickly compared to shaft. Since the thermal expansion of the impeller will be much more than the shaft, interference between impeller and shaft is likely to reduce. With reduced interference, the impeller should retain minimum required contact pressure with the shaft and the torque transmitting capability. For conventional fitted impeller, stress built up is a major concern especially at higher speeds. This paper gives a proposal about the importance of tapered interference fit method compared to cylindrical fitted impeller assembly. An effective analysis between the conventional straight fitted impeller and impeller having tapered bore is presented for the same torque transfer capability. The analysis reveals that for the impeller with tapered bore, the stress for impeller reduces and a healthy contact pressure exists.

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“…Thus, a decision maker is solely not able to choose the optimal best material by himself. Picking appropriate material among attainable options having specific characteristics and applications, is a difficult job that requires a clear Perception of the essential properties like fatigue and thermal analysis for all integral components and their knowledge in engineering design [2] is essential. It is Clear-cut that decision making is the vital factor in material selection.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Analysis on Selection of Piston Material Using MADM Techniques

Chaitanya

Srinivas²

2019

Strojnícky Časopis - Journal of Mechanical Engineering

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Decision making in material selection plays important role in selecting appropriate material based on design and manufacturing attributes. Proposing a new material is always a challenging task so the researchers used Decision making assistance tools. In the Present paper the application of Multi-Attribute Decision Making (MADM) methods are applied to the piston material selection for optimal design process. Comparative study of subjective and objective criteria weights on selected MADM methods are done. Sensitivity analysis is conducted to prove the consistency in performance score ranking order as the criteria weights for each alternative varies.

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Identification of Fatigue Cracks on the Basis of Measurable Changes in System Dynamics

Cited by 7 publications

References 12 publications

Optimization of Sluice Gate under Fatigue Life Subjected for Forced Vibration by Fluid Flow

Optimization of Sluice Gate under Fatigue Life Subjected for Forced Vibration by Fluid Flow

Effect of Tapered Interference Fit between Impeller and Shaft in Turbo Machines

Sensitive Analysis on Selection of Piston Material Using MADM Techniques

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