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

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Modeling of Machining Using a Combined Finite Element (FE) and Smoothed Particle Hydrodynamics (SPH) Method./
作者:	Ojal, Nishant.
面頁冊數:	1 online resource (152 pages)
附註:	Source: Dissertations Abstracts International, Volume: 83-03, Section: B.
Contained By:	Dissertations Abstracts International83-03B.
標題:	Mechanical engineering. -
電子資源:	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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650 4 $a Velocity. $3 3560495
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