A5031435708- Structural Behavior of Reinforced Concrete
- Wave and Wind Energy Systems
- Structural Engineering and Vibration Analysis
- Structural Load-Bearing Analysis
- Wood Treatment and Properties
- Wind Energy Research and Development
- Offshore Engineering and Technologies
- Concrete Corrosion and Durability
- Fluid Dynamics and Vibration Analysis
- Marine and Offshore Engineering Studies
- Natural Fiber Reinforced Composites
- Mechanical Behavior of Composites
- Probabilistic and Robust Engineering Design
- Mechanical stress and fatigue analysis
- Vibration and Dynamic Analysis
- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Analysis
- Structural Response to Dynamic Loads
- Tree Root and Stability Studies
- Transportation Safety and Impact Analysis
- Structural Health Monitoring Techniques
- Geotechnical Engineering and Soil Stabilization
- Plant Surface Properties and Treatments
- Fire effects on concrete materials
- Structural Analysis and Optimization
University of Maine
2015-2024
University of Minnesota
2004
Winona State University
2000
University of Wisconsin–Madison
1984
There are global efforts in the offshore wind community to develop reliable floating turbine technologies that capable of exploiting abundant deepwater resource. These require validated numerical simulation tools predict coupled aero-hydro-servo-elastic behavior such systems. To date, little has been done public domain validate tools. This work begins address this problem by presenting validation a model constructed National Renewable Energy Laboratory (NREL) simulator FAST with 1/50th-scale...
This paper summarizes the findings from Phase II of Offshore Code Comparison, Collaboration, Continued, with Correlation project. The project is run under International Energy Agency Wind Research Task 30, and focused on validating tools used for modeling offshore wind systems through comparison simulated responses select system designs to physical test data. Validation activities such as these lead improvement tools, which will enable development more innovative cost-effective designs. For...
Beyond many of Earth's coasts exists a vast deepwater wind resource that can be tapped to provide substantial amounts clean, renewable energy. However, much this resides in waters deeper than 60 m where current fixed bottom turbine technology is no longer economically viable. As result, are looking floating turbines as means harnessing offshore resource. The preferred platform for application, however, currently up debate. To begin the process assessing unique behavior various concepts...
A new floating wind turbine platform design called VolturnUS developed by the University of Maine uses innovations in materials, construction, and deployment technologies such as a concrete semisubmersible hull composite tower to reduce costs offshore wind. These novel characteristics require research development prior full-scale construction. This paper presents unique model testing effort aimed at derisking commercial projects providing scaled global motion data, allowing for materials...
Nowadays, climate change is a major global societal challenge that significantly increases environmental stress. Most international organizations and policies have promoted initiatives to minimize emissions, reduce fossil fuel dependence increase renewable energy resource integration into different sectors. An transformation toward more systems thus priority. Under this scenario, the present paper describes evaluates an alternative conversion matrix–based model combine sector...
Abstract The US offshore wind industry is maturing with several projects in various stages of development. These require site and environmental data before during operation. Conventional techniques such as fixed‐bottom meteorological towers present economical permitting challenges for the US. Floating Light Detection Ranging (LiDAR) buoys offer significant advantages including reduced costs, less permitting, reusability. This paper presents validation first floating LiDAR buoy Northeast...
Exfoliated graphite nanoplatelets (xGnP)-filled impact-modified polypropylene (IMPP) composites were prepared at 2, 4, 6, and 8 wt % xGnP with without the addition of a coupling agent manufactured using melt mixing followed by injection molding. The used in this study was polypropylene-graft-maleic anhydride (PP-g-MA). nanoparticles three different sizes: xGnP5 has an average thickness 10 nm, platelet diameter 5 μm, whereas xGnP15 xGnP25 have same but diameters are 15 25 respectively. Test...
Abstract Floating offshore wind turbines are gaining considerable interest in the renewable energy sector. Design standards for floating such as American Bureau of Shipping (ABS) Guide Building and Classing Offshore Wind Turbine Installations relatively new few if any have yet experienced prescribed design extreme environmental conditions. Only a pilot been deployed Europe Japan. These designed long return period storm events not likely to see their conditions during early deployment periods...
Energy transition requires actions from different sectors and levels, mainly focused on achieving a low-carbon high-renewable integration society. Among the sectors, transport sector is responsible for more than 20% of global greenhouse gas emissions, mostly emitted in cities. Therefore, initiatives analysis electric vehicles powered by renewables currently desirable solution to mitigate climate change promote energy transition. Under this framework, paper proposes multi-indicator estimation...
The objective of this paper is to present an investigation resistance welded thermoplastic joints using stainless steel wire mesh and polyethylene terephthalate (PET) with unidirectional E-glass fiber reinforcement. Five weld pressures six heating element types were investigated achieve high quality welds. Scanning electron microscope (SEM) images cross-sections analyzed provide a phenomenological description the weld. Welded also subjected experimental lap shear evaluation joint strengths...
The structural design of high voltage electric transmission lines in the U.S. is most often governed by National Electrical Safety Code (NESC). A simple Load and Resistance Factor Design (LRFD) format proposed as an alternative to NESC. important steps needed produce a according either NESC or LRFD are discussed compared. It shown that, with numerical values for strength load factors, accurate levels relative reliabilities among different lines, structures same line, components structure,...
Beyond many of the Earth’s coasts exist a vast deepwater wind resource that can be tapped to provide substantial amounts clean, renewable energy. However, much this resides in waters deeper than 60 m where current fixed bottom turbine technology is no longer economically viable. As result, are looking floating turbines as means harnessing offshore resource. The preferred platform for application, however, currently up debate. To begin process assessing relative advantages various concepts...
The University of Maine, in conjunction with Willamette Industries, Georgia-Pacific, Strongwell, and APA—the Engineered Wood Association, tested 90 fiber-reinforced polymer (FRP)-reinforced glue-laminated wood (glulam) beams. This study showed that a FRP reinforcement ratio 3% tension can increase glulam-allowable bending stress (Fb) by more than 100%. Furthermore, this physical testing was used to verify nonlinear probabilistic computer model for reinforced glulam, called the laminated...
A methodology for the design and optimization of a composite wind turbine tower use on floating offshore platform is presented. not only has potential to reduce maintenance upkeep costs associated with steel but also mass subsequently support mass. The problem formulated obtain that meets all strength serviceability criteria minimizes process link number dynamic analyses finite element routines using genetic algorithm. This work documents software illustrates its in various case studies 6 MW...
Fiber Reinforced Polymer (FRP) composites are increasingly used in civil infrastructure applications, primarily because of their high strength-to-weight ratio and corrosion resistance. Further deployment FRP the construction market will be accelerated by using low-cost, durable matrix materials. In this paper, published research on durability a low-cost matrix, isophthalic polyester (IPE), is reviewed results compared to more expensive vinyl ester (VE). The objective evaluate suitability IPE...