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Now showing items 21-30 of 171
AFM studies on fractured surfaces of AF1410 steel and A7075-T6 aluminum alloy
(2006)
In the present research, atomic force microscopy (AFM) was used to characterize fracture surfaces of the AF1410, ultra-high strength steel, and a high strength AA7075-T6 aluminum alloy. Both materials are used by the U.S. ...
Mixed-mode fracture & fatigue analysis of rotating blades using the extended finite element method
(2010)
This work focuses in the analysis of mixed-mode crack propagation and fatigue of two dimensional rotating blades using the Extended Finite Element Method (XFEM). A horizontal plate model simulates a UH-60 helicopter rotor ...
Assessment of storm-induced coastal changes on a high-energy microtidal reef-fringed coast
(2020-07-21)
This study sought to assess the storm-induced hydrodynamic and sediment transport patterns along the coast of Rincón, Puerto Rico during two storm events (Hurricane María and Winter Storm Riley). In order to assess short-term ...
Stability of silver colloid by process control of the synthesis using design of experiments
(2013)
Extensive resources have been utilized to develop SiC (silicon carbide) semiconductor devices, there has been relatively little effort into the development of adequate, environmentally benign electronic packaging materials ...
Virtual reality enabled design reviews using head mounted displays
(2018-05)
This research investigates the use of virtual reality technology to improve the interaction between
design engineers and their virtual prototypes during the product development process. For
this, two experiments were ...
Development of a combined interface and extended finite element method to predict delamination in composite structures
(2015-12)
For this work, an user-defined element (UEL) in ABAQUS was developed in conjunction with
a triangular traction separation law, as the Cohesive Zone Model, that combines the Extended
Finite Element and Cohesive Element ...
Impacts of low land use on a tropical montane cloud forest under a changing coastal climate
(2007)
Tropical Montane Cloud Forests (TMCF) are a primary source of fresh water in tropical locations and are highly sensitive to climate changes. Climatic analysis for El Yunque Rain Forest, a TMCF, located in North Eastern of ...
Organic/inorganic films for biosensor application
(2011)
Biosensors are becoming increasingly important as practical tools in pathogen detection and
molecular diagnostics. Electrochemical biosensors are of particular interest due to several
advantages including low-cost, easy ...
Wind turbine modeling for computational fluid dynamics
(2012-05)
With the shortage of fossil fuel and the increasing environmental awareness,
wind energy is becoming more and more important. As the market for wind
energy grows, wind turbines and wind farms are becoming larger. ...
Study of hydrogen permeation and diffusion in steels
(2005)
The high mobility of hydrogen is due to the relative small size compared to the atomic size of transition metals. However, the presence of defect (dislocations, voids, grain boundaries), can hinder hydrogen transport as ...