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RISNumerical Study of the Cold-Start Process of PEM Fuel Cells with Different Current Density Operating Modes
Publisher: ASCE
Abstract: A 1D transient model was proposed to investigate the effects of the current density operating modes on the cold-start process of proton exchange membrane (PEM) fuel cells. The temperature evolution of the cell is solved ...
Fracture Mechanics of Periodic Multilayers With Different Microstructural Scales and Moduli Contrast
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In a recent investigation of microstructural effects in finite periodic multilayers, we have shown that under Mode I loading, the crack-opening displacement approaches that of the same crack in ...
Plane Analysis of Finite Multilayered Media With Multiple Aligned Cracks—Part II: Numerical Results
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In Part I of this paper, elasticity solutions were developed for finite multilayered domains, weakened by aligned cracks, that are in a state of generalized plane deformation under two types ...
Plane Analysis of Finite Multilayered Media With Multiple Aligned Cracks—Part I: Theory
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Elasticity solutions are developed for finite multilayered domains weakened by aligned cracks that are in a state of generalized plane deformation under two types of end constraints. Multilayered ...
Applying Travel-Time Reliability Measures in Identifying and Ranking Recurrent Freeway Bottlenecks at the Network Level
Publisher: American Society of Civil Engineers
Abstract: The primary purpose of this study is to develop a systematic approach to effectively identifying and ranking recurrent freeway bottlenecks using travel-time reliability (TTR) measures. To achieve this goal, three subtasks ...
Modeling Structural Performance of Second-Generation Ultrahigh-Performance Concrete Pi-Girders
Publisher: American Society of Civil Engineers
Abstract: The concrete-damaged plasticity (CDP) model with proposed material properties replicated the observed deflection and strain responses of three experimentally tested I-girders and was determined to be consistent for different ...
Modeling Structural Performance of Ultrahigh Performance Concrete I-Girders
Publisher: American Society of Civil Engineers
Abstract: Ultrahigh performance concrete (UHPC) is an advanced cementitious composite material that has been developed in recent decades. When compared with more conventional cement-based concrete materials, UHPC tends to exhibit ...
Developing a Systematic Method for Identifying and Ranking Freeway Bottlenecks Using Vehicle Probe Data
Publisher: American Society of Civil Engineers
Abstract: Traffic congestion and freeway bottlenecks continue to challenge existing transportation networks. This study presents a systematic method to evaluate freeway performance and locate and rank freeway bottlenecks while ...
Elastic and Plastic Response of Perforated Metal Sheets With Different Porosity Architectures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effects of porosity architecture and volume fraction on the homogenized elastic moduli and elastic-plastic response of perforated thin metal sheets are investigated under three fundamental ...
Iron Oxide Magnetic Nanotubes and Their Drug Loading and Release Capabilities
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Iron oxide magnetic nanomaterials are among the most widely used nanomaterials in nanomedicine. Due to their magnetic and structural properties, iron oxide magnetic nanotubes are extremely attractive ...