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Description:: Stringent demands in the sheet forming industry related to rapid and customized part realization coupled with rigorous requirements on geometric accuracy and product properties have outpaced the capabilities of traditional forming processes. As an emerging novel technology, Double-Sided Incremental Forming (DSIF) offers much higher flexibility with the complete elimination of...
Keyword:: Incremental Forming, Springback, Control, Optimization, and Modeling
Subject:: Mechanical Engineering
Creator:: Huaqing Ren
Owner:: Scholarly Digital Publishing
Date Uploaded:: 10/28/2019
Date Modified:: 10/28/2019
Date Created:: 2018-01-01
Resource Type:: Dissertation

Description:: Demands in the aerospace, automotive and biomedical sectors for low-volume sheet metal parts made from materials with high specific strength are growing due to the needs imposed by rapid product development cycles, and personalized products to mention a few. However, high strength-to-weight ratio materials, such as Ti6Al4V, are usually difficult...
Keyword:: Electrically-assisted process, Incremental sheet forming, Geometric accuracy, and Formability
Subject:: Mechanical Engineering
Creator:: Zixuan Zhang
Owner:: Scholarly Digital Publishing
Date Uploaded:: 10/28/2019
Date Modified:: 10/28/2019
Date Created:: 2018-01-01
Resource Type:: Dissertation

Description:: In this presented study, rolling in micro scale level, termed as microrolling, has been advanced and extended its application to surface texturing and roll bonding. Meanwhile, continuous direct current (DC) is introduced to the processes to establish two new microrolling processes: the Electrically-assisted Roll Bonding (EARB) and the Electrically-assisted Microrolling-based...
Keyword:: Roll Bonding, Joule Heating Modeling, Electrically-assisted Process, Rolling, Surface Texturing, and Manufacturing
Subject:: Mechanical Engineering
Creator:: Man-Kwan Ng
Owner:: Scholarly Digital Publishing
Date Uploaded:: 10/26/2018
Date Modified:: 10/26/2018
Date Created:: 2017-01-01
Resource Type:: Dissertation

Description:: Intelligent behavior in humans is largely associated with encoding information to discrete symbols. However, symbolic behavior in robotic systems is not widespread, mainly due to lack of tools that constitute symbol-based automation implementable in real time. This thesis proposes real-time algorithms that facilitate and promote symbol-based action and sensing. In...
Keyword:: Robotics
Subject:: Mechanical Engineering
Creator:: Anastasia Mavrommati
Owner:: Scholarly Digital Publishing
Date Uploaded:: 10/22/2018
Date Modified:: 10/22/2018
Date Created:: 2017-01-01
Resource Type:: Dissertation

Description:: A major challenge in the field of Structural Health Monitoring (SHM) of safety-critical structures is how to effectively and efficiently detect fatigue damage, especially before there is macrocrack initiation. In this dissertation, a local ultrasonic technique is developed to assess pre-crack fatigue damage in structures. The novel feature of this...
Keyword:: Mechanical Engineering
Subject:: Mechanical Engineering
Creator:: Sun Li
Owner:: Scholarly Digital Publishing
Date Uploaded:: 09/06/2018
Date Modified:: 09/06/2018
Date Created:: 2008-02-26
Resource Type:: Dissertation

Description:: The macroscale mechanical and physical properties of materials are inherently linked to the underlying microstructure. Traditional continuum mechanics theories have focused on approximating the heterogeneous microstructure as a continuum, which is conducive to a partial differential equation mathematical description. Although this makes large scale simulation of material much more efficient...
Keyword:: microstructure, properties, continuum, failure, and simulation
Subject:: Mechanical Engineering
Creator:: Cahal James McVeigh
Owner:: Scholarly Digital Publishing
Date Uploaded:: 08/16/2018
Date Modified:: 08/16/2018
Date Created:: 2007-09-24
Resource Type:: Dissertation

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