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Analysis of Trimming and Enhancement of Sheared Edge Formability of Aluminum Blanks.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Analysis of Trimming and Enhancement of Sheared Edge Formability of Aluminum Blanks./
作者:	Wang, Nan.
面頁冊數:	1 online resource (296 pages)
附註:	Source: Dissertation Abstracts International, Volume: 79-03(E), Section: B.
Contained By:	Dissertation Abstracts International79-03B(E).
標題:	Mechanical engineering. -
電子資源:	click for full text (PQDT)
ISBN:	9780355312867

Analysis of Trimming and Enhancement of Sheared Edge Formability of Aluminum Blanks.
Wang, Nan.

Analysis of Trimming and Enhancement of Sheared Edge Formability of Aluminum Blanks. - 1 online resource (296 pages)

Source: Dissertation Abstracts International, Volume: 79-03(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

The objective of this dissertation was to investigate trimming process, the fracture mechanisms of the sheared edge subjected to stretching, and enhancement of sheared edge stretchability for aluminum alloys. The tooling of trimming process and methodology of measuring the major strains along the sheared edge for aluminum blanks were described. In addition, a new imaging technique which includes a digital camera was employed to track back the initiation of fracture of the sheared edge during stretching.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355312867Subjects--Topical Terms:

557493
Mechanical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Analysis of Trimming and Enhancement of Sheared Edge Formability of Aluminum Blanks.
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245 1 0 $a Analysis of Trimming and Enhancement of Sheared Edge Formability of Aluminum Blanks.
264 0 $c 2017
300 $a 1 online resource (296 pages)
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500 $a Source: Dissertation Abstracts International, Volume: 79-03(E), Section: B.
500 $a Adviser: Sergey Golovashchenko.
502 $a Thesis (Ph.D.) $c Oakland University $d 2017.
504 $a Includes bibliographical references
520 $a The objective of this dissertation was to investigate trimming process, the fracture mechanisms of the sheared edge subjected to stretching, and enhancement of sheared edge stretchability for aluminum alloys. The tooling of trimming process and methodology of measuring the major strains along the sheared edge for aluminum blanks were described. In addition, a new imaging technique which includes a digital camera was employed to track back the initiation of fracture of the sheared edge during stretching.
520 $a Furthermore, the effect of mechanical deburring, solution heat treatment of specimens conventionally trimmed with excessive clearance, roughness of sheared edge, and electrical discharge machining (EDM) on the sheared edge stretchability were investigated. In addition, stretching of narrow specimens prepared in close vicinity to the sheared edge itself and influence of stiffness of trimming tools were analyzed to explain potential reasons of leading to initiation of early fracture from the sheared edge.
520 $a On the other hand, numerical model of trimming process of aluminum blanks was performed using ABAQUS commercial code. In the analysis, 2D plane strain model was applied as finite element type, and element deletion was utilized to simulate fracture of the sheared edge. Damage criteria in plane strain condition were discussed and compared. Measurement of fracture strains in plane strain deformation for different aluminum alloys was conducted in order to estimate the range of fracture strains applied for Cockcroft-Latham damage criterion and Rice-Tracey damage criterion in the trimming simulation. According to simulation results, fracture mechanism of trimming process and the factors driving to form the burr or no burr were analyzed.
520 $a Moreover, in order to compare sheared edge stretchability with multiple trimming clearances and fracture propagation of trimmed edge with different aluminum alloys, three broadly used 6xxx aluminum alloys in automotive industry were employed. The results of standard tensile test of all three materials were very similar with rather moderate difference in work hardening and almost no difference in total elongations measured by an extensometer. In addition, the effect of cutting angles and prestraining on sheared edge stretchability and the burr heights of the sheared edge for three aluminum alloys was analyzed.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Mechanical engineering. $3 557493
655 7 $a Electronic books. $2 local $3 554714
690 $a 0548
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Oakland University. $b Engineering. $3 1182277
773 0 $t Dissertation Abstracts International $g 79-03B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10615529 $z click for full text (PQDT)