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Finite Element Studies of Orthogonal...

Patel, Jaimeen P.

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Finite Element Studies of Orthogonal Machining of Aluminum Alloy A2024-T351.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Finite Element Studies of Orthogonal Machining of Aluminum Alloy A2024-T351./
Author:	Patel, Jaimeen P.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
Description:	156 p.
Notes:	Source: Masters Abstracts International, Volume: 79-11.
Contained By:	Masters Abstracts International79-11.
Subject:	Mechanics. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10816270
ISBN:	9780355941678

Finite Element Studies of Orthogonal Machining of Aluminum Alloy A2024-T351.
Patel, Jaimeen P.

Finite Element Studies of Orthogonal Machining of Aluminum Alloy A2024-T351. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 156 p.

Source: Masters Abstracts International, Volume: 79-11.

Thesis (M.S.)--The University of North Carolina at Charlotte, 2018.

This item must not be sold to any third party vendors.

In this work, a new machining model using the commercial finite element software ABAQUS is developed. The model regards material separation, chip serration and breakage as ductile fracture processes where energy is required to form new surfaces. The main hypothesis is that the critical energy release rate for chip separation is different from the critical energy release rate for chip serration. The Johnson-Cook damage model is used to account for damage initiation in the workpiece material. The damage evolution leading to chip separation, serration and possible breakage is assumed to be governed by Hillerborg's fracture model. Two separate forms of Hillerborg fracture model are investigated and the appropriate forms for chip separation and serration are identified. A unique feature of the model is that the threshold value for the critical energy release rate for chip separation is determined from the existing experimental results. In addition, the model also uses a novel stress-based method for accounting for the frictional characteristics of the tool-chip interface. The model is verified and validated using the data available in the open literature. Various parametric studies involving cutting speed, uncut chip thickness and rake angles have been carried out to study their effect on cutting force, mechanical and thermal fields, and the chip morphologies. Our results indicate that the model is robust and the numerical predictions are in agreement with the trends observed in experiments.

ISBN: 9780355941678Subjects--Topical Terms:

525881
Mechanics.
Subjects--Index Terms:

Chip formation

Finite Element Studies of Orthogonal Machining of Aluminum Alloy A2024-T351.
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100 1 $a Patel, Jaimeen P. $3 3561283
245 1 0 $a Finite Element Studies of Orthogonal Machining of Aluminum Alloy A2024-T351.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 156 p.
500 $a Source: Masters Abstracts International, Volume: 79-11.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Cherukuri, Harish P.
502 $a Thesis (M.S.)--The University of North Carolina at Charlotte, 2018.
506 $a This item must not be sold to any third party vendors.
520 $a In this work, a new machining model using the commercial finite element software ABAQUS is developed. The model regards material separation, chip serration and breakage as ductile fracture processes where energy is required to form new surfaces. The main hypothesis is that the critical energy release rate for chip separation is different from the critical energy release rate for chip serration. The Johnson-Cook damage model is used to account for damage initiation in the workpiece material. The damage evolution leading to chip separation, serration and possible breakage is assumed to be governed by Hillerborg's fracture model. Two separate forms of Hillerborg fracture model are investigated and the appropriate forms for chip separation and serration are identified. A unique feature of the model is that the threshold value for the critical energy release rate for chip separation is determined from the existing experimental results. In addition, the model also uses a novel stress-based method for accounting for the frictional characteristics of the tool-chip interface. The model is verified and validated using the data available in the open literature. Various parametric studies involving cutting speed, uncut chip thickness and rake angles have been carried out to study their effect on cutting force, mechanical and thermal fields, and the chip morphologies. Our results indicate that the model is robust and the numerical predictions are in agreement with the trends observed in experiments.
590 $a School code: 0694.
650 4 $a Mechanics. $3 525881
650 4 $a Mechanical engineering. $3 649730
653 $a Chip formation
653 $a FE simulation
653 $a Finite element analysis
653 $a Machining simulation
653 $a Serrated chip
690 $a 0346
690 $a 0548
710 2 $a The University of North Carolina at Charlotte. $b Mechanical Engineering. $3 1286885
773 0 $t Masters Abstracts International $g 79-11.
790 $a 0694
791 $a M.S.
792 $a 2018
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10816270