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560 full-text articles. Page 1 of 23.

A Parametric Study On Reliability-Based Tmd Design Against Bridge Flutter, Filippo Ubertini, Gabriele Comanducci, Simon Laflamme 2017 University of Perugia

A Parametric Study On Reliability-Based Tmd Design Against Bridge Flutter, Filippo Ubertini, Gabriele Comanducci, Simon Laflamme

Simon Laflamme

We present a probabilistic methodology for designing tuned mass dampers for flutter suppression in long-span bridges. The procedure is computationally efficient and computes the probability of flutter occurrence based on a modified firstorder method of reliability analysis, a reduced-order representation of the structure and a time domain formulation of aeroelastic loads. Results of a parametric investigation show that the proposed methodology is preferable to a deterministic design procedure, which relies on nominal values of mechanical and aerodynamic parameters and does not guarantee the maximum safety. Furthermore, the reliability-based approach can be effectively used in the design of multiple tuned mass ...


Experimental Methods And Practices For The Study Of Toroidal Inflated, Braided Fabric Members, Daniel J. Whitney 2016 University of Maine

Experimental Methods And Practices For The Study Of Toroidal Inflated, Braided Fabric Members, Daniel J. Whitney

Electronic Theses and Dissertations

Inflatable structures have become a very important area of interest for many differing applications where lightweight packable structures are required. NASA is developing Hypersonic Inflatable Aerodynamic Decelerator (HIAD) technology that takes advantage of stacked, inflated fabric tori to form a decelerating spacecraft nose cone. The tori consist of a bladder, braided fabric shell, and reinforcing in the form of integral cords or externally bonded straps. The focus of this thesis is on the development of methods for the structural testing of inflated fabric tori and developing an enhanced understanding of their behavior. This is essential for providing insight into the ...


In Mold Flow Of Long Fibers In Compression Molding Process, Gleb Meirson 2016 The University of Western Ontario

In Mold Flow Of Long Fibers In Compression Molding Process, Gleb Meirson

Electronic Thesis and Dissertation Repository

Long Fiber Thermoplastics (LFT) are promising new materials with high physical properties and low density. These high properties are obtained by embedding very long fibers (~100 mm) into a thermoplastic matrix. Such a high fiber length dictates the use of a compression molding process for manufacturing as the length of discontinuous fibers in injection molding is limited by pellet length.

LFT composites are of great interest for the automotive industry. These materials are already used in some interior and exterior car parts such as bumpers, seat structures, door module etc. This research is inspired by the desire to manufacture load ...


Scanning Electron Microscopy Laboratory Portfolio, Gwendolyn F. Stark 2016 SUNY College of Environmental Science and Forestry

Scanning Electron Microscopy Laboratory Portfolio, Gwendolyn F. Stark

N.C. Brown Center for Ultrastructure Studies

The MCR 484 course is designed to provide students with the skills and knowledge to properly operate a Scanning Electron Microscope. In this collection are some of my best pictures from the course, as well as pictures that demonstrate the skills I have learned.


Scanning Electron Microscopy Student Image Portfolio, Matthew DaRin 2016 SUNY College of Environmental Science and Forestry

Scanning Electron Microscopy Student Image Portfolio, Matthew Darin

N.C. Brown Center for Ultrastructure Studies

Scanning Electron Microscopy Student Image Portfolio


Scanning Electron Microscopy Laboratory Portfolio, Michaela Tersmette 2016 SUNY College of Environmental Science and Forestry

Scanning Electron Microscopy Laboratory Portfolio, Michaela Tersmette

N.C. Brown Center for Ultrastructure Studies

No abstract provided.


Microstructure Control And Correlation To Creep Properties In Grade 91 Steel Weldment After Thermo-Mechanical Treatments And An Fe-30cr-3al Alloy Strengthened By Fe2nb Laves Phase, Benjamin Allen Shassere 2016 University of Tennessee, Knoxville

Microstructure Control And Correlation To Creep Properties In Grade 91 Steel Weldment After Thermo-Mechanical Treatments And An Fe-30cr-3al Alloy Strengthened By Fe2nb Laves Phase, Benjamin Allen Shassere

Doctoral Dissertations

Type IV cracking in weldments of steel pipes after creep deformation is a concern in modern fossil-fueled power plants. Two possible methods for minimizing or eliminating Type IV cracking will be discussed. The first method alters the initial microstructure of typical Grade 91 steel base metal before welding, while the second provides baseline microstructure characteristics and creep performance of a new alloy that is strengthened by the intermetallic Fe2Nb Laves phase. The initial microstructure of the Grade 91 steel can be controlled by Thermo-Mechanical Treatments, which aids in precipitation of fine (5-10 nm) MX particles in austenite before transformation to ...


Structure And Properties Of Cnt Yarns And Cnt/Cnf Reinforced Pan-Based Carbon Fibers, Nitilaksha Phalaxayya Hiremath 2016 University of Tennessee, Knoxville

Structure And Properties Of Cnt Yarns And Cnt/Cnf Reinforced Pan-Based Carbon Fibers, Nitilaksha Phalaxayya Hiremath

Doctoral Dissertations

There is continuing effort to enhance the strength and modulus of carbon fibers by various combinations of materials and processing. Carbon fibers are produced from various precursors, and the strength of the CFs are directly related to the type of precursor used to make them. Carbon Nanotubes (CNTs) have received a great deal of attention due to their unique structure and properties. Major focus of this research is on the evaluation of processing, structure and properties of CNT based yarns and composite fibers.

High strength and low cost carbon fibers (CFs) are needed for today’s applicatio ns. A low ...


Microstructural Analysis Of Thermoelastic Response, Nonlinear Creep, And Pervasive Cracking In Heterogeneous Materials, Alden C. Cook 2016 University of Maine

Microstructural Analysis Of Thermoelastic Response, Nonlinear Creep, And Pervasive Cracking In Heterogeneous Materials, Alden C. Cook

Electronic Theses and Dissertations

This dissertation is concerned with the development of robust numerical solution procedures for the generalized micromechanical analysis of linear and nonlinear constitutive behavior in heterogeneous materials. Although the methods developed are applicable in many engineering, geological, and materials science fields, three main areas are explored in this work. First, a numerical methodology is presented for the thermomechanical analysis of heterogeneous materials with a special focus on real polycrystalline microstructures obtained using electron backscatter diffraction techniques. Asymptotic expansion homogenization and finite element analysis are employed for micromechanical analysis of polycrystalline materials. Effective thermoelastic properties of polycrystalline materials are determined and compared ...


Stress Singularity Study Of Functionally Graded Material Based On Coherent Gradient Sensing Method, Jinjun Zhang 2016 Arizona State University

Stress Singularity Study Of Functionally Graded Material Based On Coherent Gradient Sensing Method, Jinjun Zhang

Kevin Lee


Functionally graded material (FGM) has some particular characteristics due to the gradual variation of physical properties. The study on mechanical behavior of FGM is of great research value. In this work, a large scale FGM which filled with small glass spheres has been prepared by gravity assisted casting technique. The elastic material constants in static condition are measured. One optical experimental method, coherent gradient sensing (CGS), is introduced to study the mechanical behavior of FGM which has exponential variation of material property. The governing equations of CGS which is used to represent the optics-mechanics relation of the singular yield near ...


Effect Of Preparation Technology On Arc Erosion Resistance Of Mgo/Cu Contact Materials, Xiuhua Guo, Kexing Song, Yanmin Zhang, Xuebin Zhang, Jianxin Gao 2016 Henan University of Science and Technology

Effect Of Preparation Technology On Arc Erosion Resistance Of Mgo/Cu Contact Materials, Xiuhua Guo, Kexing Song, Yanmin Zhang, Xuebin Zhang, Jianxin Gao

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Thermodynamic Calculation Of The Liquidus Surface Projection Of Multi-Component Aluminum Alloys, Jingrui Zhao, Yong Du, LIjun Zhang, Jixue Zhou, Yuansheng Yang 2016 Advanced Materials Institute, Shandong Academy of Sciences

Thermodynamic Calculation Of The Liquidus Surface Projection Of Multi-Component Aluminum Alloys, Jingrui Zhao, Yong Du, Lijun Zhang, Jixue Zhou, Yuansheng Yang

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Study On Impact And Friction Properties Of Za45si3cu Alloy, Weihe Shi 2016 Baise University

Study On Impact And Friction Properties Of Za45si3cu Alloy, Weihe Shi

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Microstructures And Properties Of Sintered Cu–Mos2/Cu Functional Gradient Materials, Aiqin Wang 2016 Henan University of Science and Technology

Microstructures And Properties Of Sintered Cu–Mos2/Cu Functional Gradient Materials, Aiqin Wang

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


(Alpha + Gamma) Ultrafine Duplex Structure Formation In Twophase Stainless Steel By High-Pressure Torsion And Annealing, Mie Ota, Kei Ameyama, Daiki Nanya, Sanjay Kumar Vajpai 2016 Ritsumeikan University

(Alpha + Gamma) Ultrafine Duplex Structure Formation In Twophase Stainless Steel By High-Pressure Torsion And Annealing, Mie Ota, Kei Ameyama, Daiki Nanya, Sanjay Kumar Vajpai

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Study On The Impact Abrasive Wear Of New Super-High Manganese Steel, Wenyan Wang 2016 Henan University of Science and Technology

Study On The Impact Abrasive Wear Of New Super-High Manganese Steel, Wenyan Wang

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Simulation Of Superplastic Forming Of Circular Edge-Welded Envelopes, Olga Tulupova 2016 Ufa State University of Oil & Petroleum

Simulation Of Superplastic Forming Of Circular Edge-Welded Envelopes, Olga Tulupova

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Constitutive Equation Of Compression For 38mnv Micro-Alloyed Steel, Jun Hu, Jianmin Zeng 2016 Shanghai Research Institute of Materials; Guangxi University

Constitutive Equation Of Compression For 38mnv Micro-Alloyed Steel, Jun Hu, Jianmin Zeng

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Numerical Modeling And Seismic Assessment Of Smart Isolation System For High-Speed Railway Rc Bridge Subjected To Near-Field Ground Motions, Lingkun Chen 2016 Yangzhou University

Numerical Modeling And Seismic Assessment Of Smart Isolation System For High-Speed Railway Rc Bridge Subjected To Near-Field Ground Motions, Lingkun Chen

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Characterization Of Thermal Deformation Behavior Of A Novel Tial Alloy, Xiaopeng Wang, Fantao Kong, Qin Su, Yu Zhang, Yuyong Chen 2016 Harbin Institute of Technology

Characterization Of Thermal Deformation Behavior Of A Novel Tial Alloy, Xiaopeng Wang, Fantao Kong, Qin Su, Yu Zhang, Yuyong Chen

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


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