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- Title
- A Semi-Quantitative Schlieren High-Speed Flow Diagnostic: Analysis of High-Pressure-Ratio, Overexpanded Planar Flow in Rocket Nozzles
- Author
- Thorsett-Hill, Karen
- Date Created
- 2012
- Subjects--Topical
- Mechanical engineering
- Description
- This work introduces a semi-quantitative schlieren (SQS) method which is used to qualitatively and quantitatively analyze complex, unsteady, compressible flows in a small, planar convergent-divergent nozzle. A basic schlieren system is used to ima...
- Title
- Analysis of failure time data with missing and informative auxiliary covariates.
- Author
- Ghosh, Lipika
- Date Created
- 2011
- Subjects--Topical
- Statistics, Mathematics, Biometry
- Description
- In this dissertation we use Cox's regression model to failure time data with continuous informative auxiliary variables in the presence of a validation subsample. The work is motivated by a common problem of missing or mismeasured covariates in su...
- Title
- CONSTITUTIVE MODELING OF ALUMINUM FOAM AND FINITE ELEMENT IMPLEMENTATION FOR CRASH SIMULATIONS
- Author
- Bi, Jing
- Date Created
- 2012
- Subjects--Topical
- Mechanical engineering, Engineering
- Description
- In the past decades metallic foams have been increasingly used as filler materials in crashworthiness applications due to their relatively low cost and high capacity of energy absorption. Due to the destructive nature of crashes, studies on the pe...
- Title
- Constitutive Modeling and Dynamic Impact Analysis of Bighorn Sheep Horn
- Author
- Li, Zheng
- Date Created
- 2022
- Subjects--Topical
- Mechanical engineering
- Description
- Bighorn sheep (Ovis canadensis) is known for its giant spiral horns that can sustain impact loading at a speed up to 5.5 m/s during ramming without causing severe damage or head concussion. The bighorn sheep horn is composed of a keratin-based bio...
- Title
- DEVELOPMENT, VERIFICATION, AND VALIDATION OF AN APPLIED ELEMENT METHOD SIMULATION FRAMEWORK FOR GLASS LITE FRACTURE, FRAGMENTATION, AND DEBRIS FIELD PREDICTION
- Author
- Moss, Jonathan
- Date Created
- 2020
- Subjects--Topical
- Mechanical engineering, Engineering
- Description
- In the aftermath of an explosive event, forensic investigators are presented the challenge of characterizing the properties of the explosive device, including the charge size and epicenter of the detonation. Although surrounding infrastructure dam...
- Title
- Development, Verification, and Validation of a Hybrid Testing Framework for Latticed Structures with Nonlinear Geometric Effects
- Author
- Tedeschi, Michael
- Date Created
- 2015
- Subjects--Topical
- Mechanics, Engineering, Civil engineering
- Description
- Hybrid simulation is an increasingly popular experimental method for structural dynamics research, as it offers the realism and exploratory power of full-scale testing at a fraction of the cost and size by resolving a structural system into comple...
- Title
- EVALUATING THE POTENTIAL USE OF CROWDSOURCED BICYCLE DATA FOR CYCLING ACTIVITIES AND SAFETY ANALYSIS
- Author
- Lin, Zijing
- Date Created
- 2020
- Subjects--Topical
- Transportation
- Description
- Cycling, as a healthier and greener travel mode, has been encouraged for short-distance trips by city planners and policymakers. Since cycling provides an efficient way to improve public health, alleviate traffic congestion, and reduce energy cons...
- Title
- Engineering characterization of waste derived geopolymer cement concrete for structural applications
- Author
- Tempest, Brett
- Date Created
- 2010
- Subjects--Topical
- Civil engineering, Sustainability
- Description
- Geopolymer cements provide an alternative to the Portland cement used to manufacture structural concrete. The material commonly used to produce geopolymers is fly ash, which is found in the waste stream of power generation facilities. Therefore, r...
- Title
- Finite Element Modeling and Simulations of Tractor-Trailer Impacts on Highway Median Barriers
- Author
- Gutowski, Matthew
- Date Created
- 2017
- Subjects--Topical
- Mechanical engineering
- Description
- Roadside safety hardware systems play a vital role in reducing both the number and severity of multi-vehicular collisions by preventing errant vehicles from traversing through an open median into oncoming traffic. The safety hardware used to preve...
- Title
- Finite element modeling and simulation of occupant responses in highway crashes
- Author
- Li, Ning
- Date Created
- 2014
- Subjects--Topical
- Mechanical engineering, Mechanics
- Description
- Roadside barrier systems play an important role in reducing the number of fatalities and the severity of injuries in highway crashes. After decades of work by researchers and engineers, roadside barriers have been improved and are generally effect...
- Title
- HYDRODYNAMIC SIMULATIONS OF EJECTA PRODUCTION FROM SHOCKED METALLIC SURFACES
- Author
- Karkhanis, Varad
- Date Created
- 2017
- Subjects--Topical
- Mechanical engineering, Mechanics, Aerospace engineering
- Description
- The phenomenon of mass ejection into vacuum from a shocked metallic free surfaces can have a deleterious effect on the implosion phase of the Inertial Confinement Fusion (ICF) process. Often, the ejecta take the form of a cloud of particles that a...
- Title
- Impact of Connected and Autonomous Vehicles on Mobility of Highway Systems
- Author
- Liu, Pengfei
- Date Created
- 2020
- Subjects--Topical
- Transportation, Automated vehicles
- Description
- Connected and autonomous vehicle (CAV) technologies are known as an effective way to improve safety and mobility of the transportation system. As a combination technology of connected vehicle and autonomous vehicle, CAVs share real time traffic da...
- Title
- Impacts of connected and autonomous vehicles on deep reinforcement learning controlled intersection systems
- Author
- Song, Li
- Date Created
- 2022
- Subjects--Topical
- Transportation
- Description
- Connected and autonomous vehicle (CAV) technologies could significantly change the car-following behaviors and affect the performance of the intersection systems. As it is expected to have a long transition time during which human driven vehicles ...
- Title
- MULTI-SCALE FINITE ELEMENT MODELING OF MULTI-PLY WOVEN FABRICS UNDER BALLISTIC IMPACTS
- Author
- Palta, Emre
- Date Created
- 2019
- Subjects--Topical
- Mechanical engineering, Mechanics, Engineering
- Description
- High-strength fiber reinforced woven fabrics are broadly utilized for their high strength-to-weight ratios and good flexibility to provide ballistic protection in security applications such as soft body armor equipment or protective layering of mi...
- Title
- Multiscale modeling of the properties of two-dimensional materials
- Author
- Wang, Xiaonan
- Date Created
- 2017
- Subjects--Topical
- Mechanical engineering
- Description
- The main objective of this dissertation is to study the thermal and mechanicalproperties of two dimensional materials. For this purpose, we use and combine atomiclevel simulations with continuum level simulations. In this dissertation, moleculardy...
- Title
- Optimal variable speed limit control for mixed traffic flows in a connected and autonomous vehicle environment
- Author
- Yu, Miao
- Date Created
- 2018
- Subjects--Topical
- Civil engineering
- Description
- Traffic demand grows rapidly over the past decades around the world, which leads to severe traffic congestion problems. Congestion has numerous negative effects, such as wasting time of drivers and passengers, increasing delays, decreasing travel ...
- Title
- Optimization of Building Envelope Design for Daylighting and Thermal Performance
- Author
- Futrell, Benjamin
- Date Created
- 2015
- Subjects--Topical
- Engineering, System theory, Building
- Description
- Buildings account for 40% of US energy usage. A building’s energy usage is largely determined by decisions made during its design. Such decisions relate to the form and orientation of the building, the materials used, and location of windows. A bi...
- Title
- PERFORMANCE EVALUATION OF W-BEAM GUARDRAILS ON SLOPED MEDIANS USING NONLINEAR FINITE ELEMENT SIMULATIONS
- Author
- Baker, Ryan
- Date Created
- 2014
- Subjects--Topical
- Transportation--Planning
- Description
- This thesis presents the research using finite element (FE) modeling and simulations to evaluate the performance of single-faced and double-faced W-beam guardrails for different heights under MASH Test Level 3 (TL-3) impact conditions. The modelin...
- Title
- RAPID AND DYNAMIC LOAD TESTING OF INSTRUMENTED PZ27 STEEL SHEET PILES
- Author
- Rice, Corey
- Date Created
- 2020
- Subjects--Topical
- Civil engineering
- Description
- Pile foundations are typically used for structures underlain by weaker soils in order to increase the soil resistance and, subsequently, the axial capacity. In bridge abutments, sheet piles are typically used as facing elements for soil retention ...
- Title
- STRUCTURAL IDENTIFICATION OF A FULL-SCALE TIED ARCH BRIDGE SPAN USING GENETIC ALGORITHMS
- Author
- Salas Zamudio, Neal
- Date Created
- 2016
- Subjects--Topical
- Civil engineering
- Description
- Fostered by advancements in computational capabilities and the development of low-cost structural health monitoring systems, structural identification has emerged as a promising experimental technique offering contributions to several applications...