The Resource Experimental and numerical investigation of tool heating during friction stir welding, by Joshua L. Covington

Experimental and numerical investigation of tool heating during friction stir welding, by Joshua L. Covington

Label
Experimental and numerical investigation of tool heating during friction stir welding
Title
Experimental and numerical investigation of tool heating during friction stir welding
Statement of responsibility
by Joshua L. Covington
Creator
Subject
Genre
Language
eng
Summary
  • The heat input to the tool has been investigated for friction stir welding (FSW) of aluminum alloy AL 7075-T7351 over a wide range of process operating parameters using a combined experimental/numerical approach. In a statistical Design of Experiments fashion, 54 experimental welds (bead-on-plate) were performed at 27 different parameter combinations. Measured outputs during each of the welds included forces in all three coordinate directions and internal temperature of the rotating tool at three locations near the tool/workpiece interface. The heat input to the tool was also identified for each weld using infrared imaging temperature measurement techniques and the portion of the total mechanical power entering the tool was calculated. These values were subsequently analyzed to identify the effect of process operating parameters. Two-dimensional, axisymmetric numerical heat conduction models of the tool were then produced and the approximate spatial distribution of the heat input to the tool along the tool/workpiece interface was identified
  • Experimental values for the heat input to the tool ranged from 155 W to 200 W, comprising 2.8% to 5.1% of the total mechanical power. Regression equations developed for the two values show that each is a function of the process operating parameters. Heat conduction models of the tool show that the approximate spatial distribution of the heat input to the tool along the tool/workpiece interface is one where the heat input is distributed non-uniformly along the interface, with 1% entering the tool at the pin, 20% entering at the base of the pin, and the remainder entering the flat portion of the shoulder. This distribution was valid for the majority of process operating parameter combinations tested. The maximum predicted temperature for the simulations occurred in the pin. This result was verified by the experimental tool temperature measurements. Insights gained into the FSW process from the combined experimental/numerical investigation were then discussed
Cataloging source
UPB
Degree
M.S.
Dissertation year
2005
Granting institution
Brigham Young University. Dept. of Mechanical Engineering
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • bibliography
  • theses
Label
Experimental and numerical investigation of tool heating during friction stir welding, by Joshua L. Covington
Link
http://hdl.lib.byu.edu/1877/etd961
Instantiates
Publication
Bibliography note
Includes bibliographical references (p. 91-95)
Carrier category
volume
Carrier MARC source
rdacarrier
Content category
text
Content type MARC source
rdacontent
Dimensions
28 cm.
Extent
xxiv, 135 p.
Media category
unmediated
Media MARC source
rdamedia
Other physical details
ill. (some col.)
System control number
(OCoLC)ocn373822425
Label
Experimental and numerical investigation of tool heating during friction stir welding, by Joshua L. Covington
Link
http://hdl.lib.byu.edu/1877/etd961
Publication
Bibliography note
Includes bibliographical references (p. 91-95)
Carrier category
volume
Carrier MARC source
rdacarrier
Content category
text
Content type MARC source
rdacontent
Dimensions
28 cm.
Extent
xxiv, 135 p.
Media category
unmediated
Media MARC source
rdamedia
Other physical details
ill. (some col.)
System control number
(OCoLC)ocn373822425

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