Abrasive Water Jet Particle Dispersion Characterization and Material Removal Simulation PDF Download

Author: Jeffrey Russell Cockman
Publisher:
ISBN:
Category : Abrasives
Languages : en
Pages : 58

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Author: Sachin Salunkhe
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 311124041X
Category : Technology & Engineering
Languages : en
Pages : 347

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Book Description
This book explores new possibilities in the domain of abrasive waterjet machining (AWJM) of composites and polymers. AWJM is a sustainable and well industrialized process, but some parameters of AWJM process need to be optimized according to new composites materials and polymers to obtain the desired machining characteristics. This book presents the reader with the state of the art methodology to cut the advanced composite materials.

Author: Yu Yang
Publisher:
ISBN:
Category : Water jet cutting
Languages : en
Pages : 346

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Book Description

Author: W. H. Shafer
Publisher: Springer Science & Business Media
ISBN: 9780306444951
Category : Education
Languages : en
Pages : 368

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Book Description
Volume 36 reports (for thesis year 1991) a total of 11,024 thesis titles from 23 Canadian and 161 US universities. The organization of the volume, as in past years, consists of thesis titles arranged by discipline, and by university within each discipline. The titles are contributed by any and all a

Author: Zhongchen Cao
Publisher:
ISBN:
Category : Grinding and polishing
Languages : en
Pages : 188

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Book Description
Secondly, a comprehensive computational fluid dynamic (CFD)-based erosion model was developed by a combination of CFD simulation, erosion model, and experimental research so as to predict the material removal characteristics and surface generation in fluid jet polishing. In the computational fluid dynamic simulations, an Eulerian-Eulerian-Lagrangian method is used which treats the water and air as an Eulerian phase and the particles as Lagrangian particles. The coupled discrete phase model (DPM) and the volume of fluid (VOF) model are used to describe the multiphases in the FJP process. This CFD model also presents the application of the k-w model, together with the level set method, to describe the slurry/air interface in the commercial finite element analysis package FLUENT. After solving the stream flow characteristics, the motion of individual particles is also calculated in order to obtain more accurate predictions of the trajectories of individual particles impacting on the surface. The predicted results are used to integrate with the developed erosion model for the prediction of the material removal characteristics. Hence, the polishing path planning is determined based on the desired surface integrity of the optical surface to be generated using the data of the material removal characteristics. Finally, a theoretical model is built for predicting and simulating the surface generation in FJP. A series of spot and pattern polishing tests as well as simulation experiments by the theoretical model were conducted. The results not only show that the theoretical model predicts well for the surface generation under different polishing conditions but also helps to gain a better understanding of the polishing process in FJP. In the third part, a multi-scale theoretical model was established for predicting and characterizing the material removal characteristics and surface generation in bonnet polishing based on contact mechanics, kinematics theory and abrasive wear mechanism. Specifically, the pressure and velocity distributions are determined based on the kinematics theory and contact mechanics at the macro scale, and the pad topography which affects the contact ratio and hence the material removal rate at the micro scale, while the micro- or nano-sized abrasive particles scratch the surface at the nano scale. The model developed in this study attempts to capture much of the basic physics of the polishing process including the tool radius, polishing depth, head speed, precess angle, pad topography, polishing time, particle shape, slurry concentration, and the mechanical properties of the pad and workpiece. Experimental results show that the theoretical model predicts well that the material removal amount which increases with increasing precess angle and tool offset, depends linearly on the head speed and slurry concentration. A pattern test was also conducted to validate the surface generation model. The originality and significance of this research lies in the provision of CFD-based modelling of the material removal characteristics and surface generation for fluid jet polishing and multi-scale modelling of the material removal characteristics and surface generation for bonnet polishing. The successful development of the theoretical model helps greatly to make the CCUP process more predictive, so as to further optimize the manufacturing process for different work materials without the need for costly trial and error polishing tests. Moreover, this is the first of its kind in which the deterministic model has been successfully built which acquires much of the basic physics of the polishing process. This contributes significantly to form the theoretical basis for the better understanding of the polishing process.

Author: Andreas W. Momber
Publisher: Springer
ISBN:
Category : House & Home
Languages : en
Pages : 464

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Book Description
Abrasive water jet machining was introduced to manufacturing ten years ago and has been increasingly used for treating hard-to-machine and multi-layered materials and as an alternative tool for milling, turning, drilling and polishing. This is the first comprehensive review of the technique, dealing with a broad range of issues including mixing and acceleration processes, material removal mechanisms, process optimization and fluid mechanics. Explanations are given as the book follows the development of an abrasive water jet machining process, from tool generation through to machining results, supervision and control. This methodical journey through the field is marked by drawings, graphs and tables, many of which are being published here for the first time. Though the book is written at an academic level, it focuses very much on practical applications, which reflects the authors' extensive involvement with both laboratory research and industrial practices.

Author: Jun Wang
Publisher: Trans Tech Publications
ISBN:
Category : House & Home
Languages : en
Pages : 120

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Book Description
This text should be useful to both researchers and postgraduates or final-year undergraduates who are specializing in manufacturing processes. It should also be useful to those industrial users of materials processing who are charged with making abrasive waterjet machining more efficient.

Author: Staffan Jacobson
Publisher:
ISBN:
Category :
Languages : sv
Pages : 94

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Book Description

Author: Vahid Rastegar
Publisher:
ISBN:
Category : Materials science
Languages : en
Pages : 250

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Book Description

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 886

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Book Description