Title page for etd-0811115-154738


[Back to Results | New Search]

URN etd-0811115-154738
Author Pao-ying Huang
Author's Email Address No Public.
Statistics This thesis had been viewed 5331 times. Download 418 times.
Department Mechanical and Electro-Mechanical Engineering
Year 2014
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Theoretical and Experimental Studies on the Friction Stir Welding of Dissimilar Materials using an Embedded-rod Tool
Date of Defense 2015-07-29
Page Count 47
Keyword
  • material flow
  • time history
  • friction stir lap joint
  • faying surface
  • dissmillar materials
  • Abstract . In order to understand the temperature rise and the plastic flow of the workpiece in the friction stir spot lap welding (FSSLW) of dissimilar metals, a numerical model suitable for the embedded tool is established in this study. Theoretical results are compared with that of experimental measurements to verify the theoretical model. First, the simulation for the steel on steel FSSLW is conducted to calculate the time histories of the temperature rise and plastic flow of the workpiece. Results show that the rate of temperature rise is larger than that of measured one at the initial stage of FSSLW due to the fitting degree between tool and workpiece in the experiment, but they are consistent with each other after that. Comparison of steel/aluminum and aluminum/steel FSSLW, results show that the rate of temperature rise of steel/aluminum is slower than that of steel/steel since the thermal conductivity of aluminum is 2.6 times as large as that of low-carbon steel. With the thicker aluminum plate, the faying surface temperature between the steel and aluminum is lower than that of thinner one, and narrower range of plastic flow. In general, the higher thermal conductivity for both upper and lower plates would lower the faying surface temperature, and they need to use the higher rotating speed and the higher downward to achieve the same surface temperature.
    Advisory Committee
  • Yeau-Ren Jeng - chair
  • Jen-Fin Lin - co-chair
  • Rong-Tsong Lee - advisor
  • Yuang-Cherng Chiou - advisor
  • Files
  • etd-0811115-154738.pdf
  • Indicate in-campus at 1 year and off-campus access at 1 year.
    Date of Submission 2015-09-14

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys