Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 4 of 4

Full-Text Articles in Engineering

On The Cyclic Inelastic Behavior And Shakedown-Based Design Of Metallic Materials And Structures: Analysis And Experiments, Ismail Soner Cinoglu Jan 2020

On The Cyclic Inelastic Behavior And Shakedown-Based Design Of Metallic Materials And Structures: Analysis And Experiments, Ismail Soner Cinoglu

Theses and Dissertations

Metallic structures in many engineering disciplines are subject to repeated and extreme thermomechanical loading conditions. The conventional design of these types of structures, that are not limited by high-cycle fatigue, employs first-yield criteriain order to avoid failure due to cyclic plasticity. However, yield-limited designs often fail to produce acceptable solutions for multifunctional structures in extreme environments. In order to overcome these limitations and capitalize on the elastoplasticload-bearing reserve, this dissertation analytically, numerically, and experimentally demonstrates inelastic design methods that exploit shakedown for metallic structures. Several analytic and numerical case studies are presented that are relevant to aerospaceand civil engineering applications ...


Large-Scale Experimental, Numerical, And Design Studies Of Steel Mrf Structures With Nonlinear Viscous Dampers, Baiping Dong Jan 2016

Large-Scale Experimental, Numerical, And Design Studies Of Steel Mrf Structures With Nonlinear Viscous Dampers, Baiping Dong

Theses and Dissertations

Analytical and large-scale experimental studies on steel MRF building structures with nonlinear viscous dampers were conducted. The primary objectives of this research are to investigate the seismic response and performance of steel MRF structures with nonlinear viscous dampers and develop a simplified design procedure (SDP) for seismic design of these structures. The prototype building for this research is an office building located on a stiff soil site in Southern California. Moment resisting frames (MRFs) and frames with nonlinear viscous dampers and associated diagonal bracing (DBFs) constitute the seismic force resisting system (SFRS). Three different strength level designs of the prototype ...


An Investigation Of Melt Modulation Science For Enhanced Polymer Product Manufacturing, Majed Alsarheed Jan 2015

An Investigation Of Melt Modulation Science For Enhanced Polymer Product Manufacturing, Majed Alsarheed

Theses and Dissertations

The melt modulation concept was originally introduced to control the melt flow during the filling phase of cold runner injection molding machines. Since its inception, several melt modulation systems have been developed. Although previously designed systems successful balanced multi-cavity and family molding parts and controlled weld-line position, they were not commercially viable. The main objective of this dissertation was to employ scientific and business based approaches to develop and enhance a melt modulation technology for cold-runner based injection molding. This research intends to bridge the gap between an important scientific discovery and its industrial applications. This was achieved with the ...


Analytical And Experimental Study Of Horizontally Curved Steel Bridge Girders With Tubular Top Flanges, Haiying Ma Jan 2015

Analytical And Experimental Study Of Horizontally Curved Steel Bridge Girders With Tubular Top Flanges, Haiying Ma

Theses and Dissertations

The use of steel I-shaped girders with tubular flanges (i.e., tubular flange girders or TFGs) has been proposed for curved highway bridges. Compared with conventional steel plate I-shaped girders (IGs), TFGs have substantially greater torsional stiffness and strength, which improves significantly the behavior of an individual curved TFG compared with a corresponding IG. One type of TFG with a rectangular tube as the top flange and a flat plate as the bottom flange (i.e., the TFG1 section) is studied in this research. Compared to the previously studied TFG with rectangular tubes as the top and bottom flanges (i ...