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Journal ArticleDOI

Modelling and analysis of abrasive water jet cut surface topography

01 Sep 2002-International Journal of Machine Tools & Manufacture (Pergamon)-Vol. 42, Iss: 12, pp 1345-1354
TL;DR: In this paper, a new approach is proposed for modelling the 3D topography produced on abrasive water jet (AWJ) cut surface, which makes use of the trajectory of jet, predicted from the theory of ballistics and Bitter's theory of erosion for material removal, for numerically simulating the cutting front.
Abstract: In this paper, a new approach proposed for modelling the three-dimensional (3D) topography produced on abrasive water jet (AWJ) cut surface is presented. It makes use of the trajectory of jet, predicted from the theory of ballistics and Bitter’s theory of erosion for material removal, for numerically simulating the cutting front. The 2D topography at different depths of the cut surface is generated by considering the trajectories on the cutting front and the abrasive particles impacting the walls of cut surface randomly. For realistic generation of topography on cut surfaces, several instantaneous profiles generated in each region of cut are superimposed to obtain an effective profile. The nature of effective profiles thus predicted is analyzed and validated using power spectral density analysis. The effective profiles predicted at different depths are in turn used to generate the 3D topography of AWJ cut surface. Results obtained with the proposed model are validated with the experimental results.
Citations
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Journal ArticleDOI
TL;DR: In this paper, an explicit finite element analysis (FEA) of a single abrasive particle impact on stainless steel 1.4301 (AISI 304) in abrasive water jet (AWJ) machining is presented.

112 citations


Cites background from "Modelling and analysis of abrasive ..."

  • ...Vikram and Ramesh Babu [5] attempt to model 3D topography of the surface cut by AWJ....

    [...]

Journal ArticleDOI
TL;DR: In this paper, the authors present the recent developments of HEFJet-Mach from various perspectives: machine/system designs; modelling of both jet plumes and their interactions with the target surfaces; part quality including material integrity; supervision and control of the process; key aspects of machine maintenance and health and safety.

86 citations

Journal ArticleDOI
TL;DR: The application of an elasto-plastic model based explicit finite element analysis (FEA) to model the erosion behaviour in abrasive water jet machining (AWJM) yields largely improved results.

85 citations


Cites methods from "Modelling and analysis of abrasive ..."

  • ...To model the 3D topography of the surface cut by AWJ, ballistic theory was used to predict the trajectory of the jet in the workpiece material and Bitter’s theory was used to predict the material removal [9]....

    [...]

Journal ArticleDOI
TL;DR: In this paper, the use of the declination angle for a prediction and control of the abrasive water jet cutting quality is presented, and a method for its measurement is proposed, which is explained in the theory resulting from former conclusions of Hashish, Zeng and Kim, Hlavac and others.

78 citations

References
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Journal ArticleDOI
J.G.A. Bitter1
01 Jan 1963-Wear
TL;DR: In this article, the authors derived an expression for the energy needed to remove a unit volume of material from the body surface and described the plastic-elastic behaviour of the substance.

1,075 citations

Journal ArticleDOI
01 May 1963-Wear
TL;DR: In this paper, the combination of the two types of wear is discussed and the equations are shown to agre% with the results of experiments on hard and brittle, and on soft and ductile mate&& Several erosion phenomena are explained by the furmuIae, and indications for preventing or reducing erosion in practice.

815 citations

Book
03 Feb 2012
TL;DR: In this article, the authors classified and characterised abrasive materials and the generation of Abrasive Water Jets, and the structure and hydrodynamics of these materials.
Abstract: Preface.- Nomenclature.- Introduction.- Classification and Characterization of Abrasive Materials.- Generation of Abrasive Water Jets.- Structure and Hydrodynamics of Abrasive Water Jets.- Material-Removal Mechanisms in Abrasive Water-Jet Machining.- Modeling of Abrasive Water Jet Cutting Processes.- Process Parameter Optimization.- Geometry, Topography and Integrity of Abrasive Water-Jet Machined Parts.- Alternative Machining Operations With Abrasive Water Jet.- Control and Supervision of Abrasive Water-Jet Machining Processes.- References.

436 citations

Journal ArticleDOI
TL;DR: In this paper, the authors presented a model for predicting the depth of cut of abrasive-waterjets in different metals based on an improved model of erosion by solid particle impact, which is also presented.
Abstract: Ultrahigh-pressure abrasive-waterjets (AWJs) are being developed as net shape and near-net-shape machining tools for hard-to-machine materials. These tools offer significant advantages over existing techniques, including technical, economical, environmental, and safety concerns. Predicting the cutting results, however, is a difficult task and a major effort in this development process. This paper presents a model for predicting the depth of cut of abrasive-waterjets in different metals. This new model is based on an improved model of erosion by solid particle impact, which is also presented. The erosion model accounts for the physical and geometrical characteristics of the eroding particle and results in a velocity exponent of 2.5, which is in agreement with erosion data in the literature. The erosion model is used with a kinematic jet-solid penetration model to yield expressions for depths of cut according to different modes of erosion along the cutting kerf. This kinematic model was developed previously through visualization of the cutting process. The depth of cut consists of two parts: one due to a cutting wear mode at shallow angles of impact, and the other due to a deformation wear mode at large angles of impact. The predictions of the AWJ cutting model are checked against a large database of cutting results for a wide range of parameters and metal types. Materials are characterized by two properties: the dynamic flow stress, and the threshold particle velocity. The dynamic flow stress used in the erosion model was found to correlate with a typical modulus of elasticity for metals. The threshold particle velocity was determined by best fitting the model to the experimental results. Model predictions agree well with experimental results, with correlation coefficients of over 0.9 for many of the metals considered in this study.

217 citations