Analogy Between Erosion Damage and Pitting of Machine Component Surfaces

2009 ◽  
pp. 409-409-13
Author(s):  
SP Kozirev
Keyword(s):  
Machine Component ◽  
Erosion Damage

Erosion Damage to Impeller of Welding Fume Extraction System

2020 ◽  
Vol 57 (8) ◽  
pp. 569-575
Author(s):  
A. Neidel ◽  
V. Hartanto ◽  
S. Riesenbeck ◽  
T. Ullrich
Keyword(s):  
Extraction System ◽  
Welding Fume ◽  
Erosion Damage

Effects of Multiple Impacts and Size Distribution of Particles on Erosion Predictions Using CFD

2007 ◽  
Author(s):  
Yongli Zhang ◽  
Brenton S. McLaury ◽  
Siamack A. Shirzai
Keyword(s):  
Experimental Data ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Target Material ◽  
Average Particle ◽  
Multiple Impacts ◽  
Cfd Simulations ◽  
Erosion Damage ◽  
Wide Range

Erosion equations are usually obtained from experiments by impacting solid particles entrained in a gas or liquid on a target material. The erosion equations are utilized in CFD (Computational Fluid Dynamics) models to predict erosion damage caused by solid particle impingements. Many erosion equations are provided in terms of an erosion ratio. By definition, the erosion ratio is the mass loss of target material divided by the mass of impacting particles. The mass of impacting particles is the summation of (particle mass × number of impacts) of each particle. In erosion experiments conducted to determine erosion equations, some particles may impact the target wall many times and some other particles may not impact the target at all. Therefore, the experimental data may not reflect the actual erosion ratio because the mass of the sand that is used to run the experiments is assumed to be the mass of the impacting particles. CFD and particle trajectory simulations are applied in the present work to study effects of multiple impacts on developing erosion ratio equations. The erosion equation as well as the CFD-based erosion modeling procedure is validated against a variety of experimental data. The results show that the effect of multiple impacts is negligible in air cases. In water cases, however, this effect needs to be accounted for especially for small particles. This makes it impractical to develop erosion ratio equations from experimental data obtained for tests with sand in water or dense gases. Many factors affecting erosion damage are accounted for in various erosion equations. In addition to some well-studied parameters such as particle impacting speed and impacting angle, particle size also plays a significant role in the erosion process. An average particle size is usually used in analyzing experimental data or estimating erosion damage cases of practical interest. In petroleum production applications, however, the size of sand particles that are entrained in produced fluids can vary over a fairly broad range. CFD simulations are also performed to study the effect of particle size distribution. In CFD simulations, particle sizes are normally distributed with the mean equaling the average size of interest and the standard deviation varying over a wide range. Based on CFD simulations, an equation is developed and can be applied to account for the effect of the particle size distribution on erosion prediction for gases and liquids.

Intelligent recognition of erosion damage to concrete based on improved YOLO-v3

2021 ◽  
pp. 130363
Author(s):  
Xiaoning Cui ◽  
Qicai Wang ◽  
Rongling Zhang ◽  
Jinpeng Dai ◽  
Sheng Li
Keyword(s):  
Erosion Damage ◽  
Intelligent Recognition

Image based portable wear debris analysis tool

2015 ◽  
Vol 67 (4) ◽  
pp. 389-398 ◽  
Author(s):  
Muhammad Ali Khan ◽  
Ahmed Farooq Cheema ◽  
Sohaib Zia Khan ◽  
Shafiq-ur-Rehman Qureshi
Keyword(s):  
Real Time ◽  
Wear Debris ◽  
Machine Component ◽  
Analysis Tool ◽  
Content Type ◽  
Real Time Analysis ◽  
Distribution Shape ◽  
Basic Features ◽  
Health Diagnosis ◽  
Wear Debris Analysis

Purpose – The purpose of this paper is to show the development of an image processing-based portable equipment for an automatic wear debris analysis. It can analyze both the qualitative and quantitative features of machine wear debris: size, quantity, size distribution, shape, surface texture and material composition via color. Design/methodology/approach – It comprises hardware and software components which can take debris in near real-time from a machine oil sump and process it for features diagnosis. This processing provides the information of the basic features on the user screen which can further be used for machine component health diagnosis. Findings – The developed system has the capacity to replace the existing off-line methods due to its cost effectiveness and simplicity in operation. The system is able to analyze debris basic quantitative and qualitative features greater than 50 micron and less than 300 micron. Originality/value – Wear debris basic features analysis tool is developed and discussed. The portable and near real-time analysis offered by the discussed work can be more technically effective as compared to the existing off-line and online techniques.

Improved CFD modeling and validation of erosion damage due to fine sand particles

Wear ◽  
2015 ◽  
Vol 338-339 ◽  
pp. 339-350 ◽  
Author(s):  
Amir Mansouri ◽  
Hadi Arabnejad ◽  
Soroor Karimi ◽  
Siamack A. Shirazi ◽  
Brenton S. McLaury
Keyword(s):  
Fine Sand ◽  
Cfd Modeling ◽  
Erosion Damage ◽  
Sand Particles

Application of Multifunctional Materials for Machine Tool Structures

2009 ◽  
Author(s):  
Francesco Aggogeri ◽  
Angelo Merlo ◽  
Marco Mazzola ◽  
Nicola Pellegrini
Keyword(s):  
Thermal Stability ◽  
Machine Tool ◽  
Metal Foam ◽  
Operating Time ◽  
Weight Ratio ◽  
Material Behavior ◽  
Time Range ◽  
Machining Accuracy ◽  
Machine Component ◽  
Latent Heat Storage

The competition on the international markets pushes manufacturers towards shorter design cycles and decreasing manufacturing times and costs for their products. This trend generates a demand for smart, flexible and faster machining systems, easy to set up and configure, which are able to drastically reduce machining time and improve the final accuracy. This paper rises from these considerations evaluating the possible application of multifunction materials in machine tool (MT) design and building. These solutions can provide a fundamental impact on functionality and reliability of a manufacturing system. In particular, use of innovative materials in today’s technology continues to grow steadily. Numerous reasons for this growth include light weight, superior insulating abilities, energy absorbing performance, excellent strength/weight ratio and low cost. This paper aims to investigate a possible application of multifunction materials in realisation of structure components for Machine Tools. There are many aspects that affect the machining accuracy and the cutting conditions of a high performance MT. The most important issues are related to the static, dynamic, mechatronic and thermal behavior of the machines. In particular, a strict requirement that a machine tool has to fulfill in order to drastically reduce operating time while improving the final accuracy is the thermal stability. This paper shows a complete study and testing validation on prototypes (plates and beam) based on sandwiches with core made of metal foam (open and closed cells) materials impregnated by a PCM (Phase Material Change) wax. Metal foams represent a class of materials with low density and novel physical, mechanical, thermal, electrical and acoustic proprieties. They offer potential for lightweight structures, for energy absorption and thermal management. PCMs are latent heat storage materials that absorb heat keeping constant the temperature of a machine component in a defined time range. The authors have designed, realized and tested the prototypes developing thermal trials, and then evaluating the comparison between experimental data and simulative analysis (FEM). The trials consisted to process the prototypes at a variation of temperature in order to assess the PCM proprieties to absorb heat and maintain thermal stability in a defined time range. The paper shows also a simulative study on PCM material behavior and their application in MT design supported by experimental trials and data analysis. The significant advantages and perspectives that can be obtained in applying of these MT structures complete the developed study.

Cavitation in impacted drops and jets and the effect on erosion damage thresholds

Wear ◽  
2012 ◽  
Vol 290-291 ◽  
pp. 154-160 ◽  
Author(s):  
J.E. Field ◽  
J.-J. Camus ◽  
M. Tinguely ◽  
D. Obreschkow ◽  
M. Farhat
Keyword(s):  
Erosion Damage

Hydrological structure and erosion damage caused by concentrated flow in cultivated catchments

CATENA ◽  
1995 ◽  
Vol 25 (1-4) ◽  
pp. 227-252 ◽  
Author(s):  
Bruno Ludwig ◽  
Jean Boiffin ◽  
Joël Chad˦uf ◽  
Anne-Véronique Auzet
Keyword(s):  
Erosion Damage ◽  
Concentrated Flow ◽  
Hydrological Structure
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