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Modeling of Machining Using a Combined Finite Element (FE) and Smoothed Particle Hydrodynamics (SPH) Method.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Modeling of Machining Using a Combined Finite Element (FE) and Smoothed Particle Hydrodynamics (SPH) Method./
Author:	Ojal, Nishant.
Description:	1 online resource (152 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 83-03, Section: B.
Contained By:	Dissertations Abstracts International83-03B.
Subject:	Mechanical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28650372click for full text (PQDT)
ISBN:	9798535572123

Modeling of Machining Using a Combined Finite Element (FE) and Smoothed Particle Hydrodynamics (SPH) Method.
Ojal, Nishant.

Modeling of Machining Using a Combined Finite Element (FE) and Smoothed Particle Hydrodynamics (SPH) Method. - 1 online resource (152 pages)

Source: Dissertations Abstracts International, Volume: 83-03, Section: B.

Thesis (Ph.D.)--The University of North Carolina at Charlotte, 2021.

Includes bibliographical references

In this thesis, a combined approach based on the Finite Element (FE) and Smoothed Particle Hydrodynamics (SPH) methods is proposed to model turning operations. The approach exploits the advantages of each method and leads to high-fidelity coupled FE-SPH machining models that are significantly more numerically efficient and are on par with the models based on each of the two methods alone. Both two-dimensional and three-dimensional models are developed and validated by comparing predicted forces and chip morphologies with experimental results. Parametric studiesare carried out to fine-tune the model-based parameters in order to avoid numerical stability issues. The three-dimensional models are extended to included modulated tool path (MTP) machining which is a technique for breaking chips during machining by modulating the motion of the tool. The MTP model predictions are shown to agree with the results from an existing analytical model. With this model, various tool paths can be simulated to choose an optimal path that decreases tool-wear without sacrificing productivity. Preliminary results from a three-dimensional turning model incorporating machining dynamics through a spring-damper system are also presented. This model has the potential to be used for studying machining stability for a given set of machining conditions.Another significant contribution of this thesis is the determination of Johnson-Cook material model parameters for a given material using an inverse method and experimental values of cutting forces and workpiece temperatures. The methodology described in the present work identifies the non-uniqueness of the solution to the inverse problem and proposes an approach that eliminates the non-uniqueness.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798535572123Subjects--Topical Terms:

649730
Mechanical engineering.
Subjects--Index Terms:

Finite Element methodIndex Terms--Genre/Form:

542853
Electronic books.

Modeling of Machining Using a Combined Finite Element (FE) and Smoothed Particle Hydrodynamics (SPH) Method.
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500 $a Source: Dissertations Abstracts International, Volume: 83-03, Section: B.
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502 $a Thesis (Ph.D.)--The University of North Carolina at Charlotte, 2021.
504 $a Includes bibliographical references
520 $a In this thesis, a combined approach based on the Finite Element (FE) and Smoothed Particle Hydrodynamics (SPH) methods is proposed to model turning operations. The approach exploits the advantages of each method and leads to high-fidelity coupled FE-SPH machining models that are significantly more numerically efficient and are on par with the models based on each of the two methods alone. Both two-dimensional and three-dimensional models are developed and validated by comparing predicted forces and chip morphologies with experimental results. Parametric studiesare carried out to fine-tune the model-based parameters in order to avoid numerical stability issues. The three-dimensional models are extended to included modulated tool path (MTP) machining which is a technique for breaking chips during machining by modulating the motion of the tool. The MTP model predictions are shown to agree with the results from an existing analytical model. With this model, various tool paths can be simulated to choose an optimal path that decreases tool-wear without sacrificing productivity. Preliminary results from a three-dimensional turning model incorporating machining dynamics through a spring-damper system are also presented. This model has the potential to be used for studying machining stability for a given set of machining conditions.Another significant contribution of this thesis is the determination of Johnson-Cook material model parameters for a given material using an inverse method and experimental values of cutting forces and workpiece temperatures. The methodology described in the present work identifies the non-uniqueness of the solution to the inverse problem and proposes an approach that eliminates the non-uniqueness.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
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650 4 $a Disadvantages. $3 3684692
650 4 $a Dissertations & theses. $3 3560115
650 4 $a Approximation. $3 3560410
650 4 $a Researchers. $3 3560729
650 4 $a 19th century. $3 1972810
650 4 $a Boundary conditions. $3 3560411
650 4 $a Friction. $3 650299
650 4 $a Simulation. $3 644748
650 4 $a Velocity. $3 3560495
650 4 $a Viscosity. $3 1050706
650 4 $a Experiments. $3 525909
650 4 $a Strain hardening. $3 3681455
650 4 $a Variables. $3 3548259
650 4 $a Methods. $3 3560391
650 4 $a Finite element analysis. $3 3554062
650 4 $a Literature reviews. $3 3559998
650 4 $a Algorithms. $3 536374
650 4 $a Deformation. $2 lcstt $3 3267001
650 4 $a Physical properties. $3 3564184
650 4 $a Fluid mechanics. $3 528155
650 4 $a Geometry. $3 517251
650 4 $a Morphology. $3 591167
653 $a Finite Element method
653 $a Johnson-Cook Material model
653 $a Machining
653 $a Machining dynamics modelling
653 $a Modulated Tool path
653 $a Smoothed Particle Hydrodynamics (SPH)
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710 2 $a The University of North Carolina at Charlotte. $b Mechanical Engineering. $3 1286885
773 0 $t Dissertations Abstracts International $g 83-03B.
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