The research from the mechanics/materials/structural engineering group at Stevens focuses its research on multiscale modeling and reliability/uncertainty/risk assessment of complex material/structural systems. Current research topics include:
• stochastic finite element methods
• multiscale computational algorithms
• numerical simulation of crack failure and
• soil-structure interaction subject to cyclic loadings.
Material Surface Properties Modification by Nonequilibrium Plasmas
The research demonstrates a new low-temperature, environmentally sound, highly controllable method of depositing coatings or modifying surfaces using APJet's patented Atmospheric-Pressure Plasma Jet (APPJ) technology.
Enzyme Deactivation of Energetics in Non-Aqueous Solvents
The proposed work will perform exploratory experiments in order to assess the feasibility of energetic compounds deactivation using small amounts of enzymes dispersed in organic solvents. The objective of this proof of concept phase is to identify suitable enzyme(s)/organic solvent combinations capable to deactivating energetic compounds at a controlled rate.
Fate, Transport and Toxicity of Tungsten Alloys Utilized in Munition Applications in Soil Environments
This research is to:
• evaluate the mobility of WHA components from fragments and grains in the subsurface environment (dissolved phase, soil-groundwater interactions);
• assess the bioavailability of WHA components;
• evaluate the toxicity of tungsten and other WHA components;
• evaluate the mobility of colloidal WHA components from fragments and grains in the subsurface environment (soil, groundwater interactions);
• assess remedial technologies to remove various forms of tungsten (i.e., particulates, colloids, dissolved) from contaminated soil and water;
Fate and Transport in the Environment of Nano Aluminum Particles
The research is to evaluate the rate of release, mobility and environmental effects of nanoaluminum particles used in meta-stable Al-based intermolecular composites (MIC) and propellant formulations
Ocean Observing and Forecasting
The ocean observing and forecasting research is based on the use of the latest information on physical oceanography, hydraulic engineering and computer science for monitoring and predicting the movement and mixing of fresh and salt waters and the constituents they carry. The fate and transport of sediments are an integral component of this research area. The approach to the research is designed to take advantage of the rapidly evolving high performance computational and communications technologies.
The New York Harbor Observing and Prediction System (NYHOPS) - an Urban Ocean Observatory is an example of this research area. It provides a wealth of real-time data about tides, waves, winds, currents, temperatures and salinities in the waters of New York and New Jersey. NYHOPS is an open-access network of distributed sensors and linked computer estuarine and coastal ocean forecasting models. All of the data is available over the Internet 24 hours a day by means of weather forecast-like maps that can be used effectively by sailors, power boaters, swimmers, and fishermen as well as port security officials, and emergency management personnel. NYHOPS can be located on the Web at: http://www.stevens.edu/maritimeforecast/.
Coastal Observations and Analysis
The New Jersey Coastal Monitoring Network (CMN) is designed to provide real-time information to local, State, and Federal emergency management personnel, and long-term records of wave, weather conditions and shoreline response for use by the coastal scientific community.
Estuarine Circulation and Sediment Transport
The New York Harbor Contaminated Sediments Study coordinates water and sediment quality sampling studies undertaken at the head-of-tide and within the tidal reaches of the major New Jersey tributaries that discharge to NJ-NJ Harbor. The goal of these synoptic studies is to develop an understanding of the contaminant transport pathways within the estuary.
This research area encompasses both environmental hydrodynamics and naval architecture. The approaches to these disciplines are designed to take advantage of the rapidly evolving high performance computational and communications technologies.
This research discipline is the focus of several related areas including:
• Examination of the stability, control and behavior of all types of marine craft in environments ranging from calm water to random sea states.
• Physical model testing and computer simulation of advanced marine craft such as submarines, seaplanes, amphibious vehicles and planing craft.
• Fundamental research in marine hydrodynamics, including the analysis of flow around submerged vehicles, propeller-turbulence interaction and wave dynamics.
At Stevens acoustic research is centered on the study and application of the nonlinear interaction of acoustic and vibration energy in various media and materials. Research includes:
• Nonlinear vibro-acoustic nondestructive testing.
• Acoustic and vibration characterization of porous materials.
• Detection and characterization of submerged/buried objects, such as land mines, pipes, etc.
• The use of powerful sound and vibration for bio-fouling control.
• Development of low frequency underwater sound sources.
• Noise and vibration control.