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Articles 31 - 60 of 142
Full-Text Articles in Mechanical Engineering
Spring 2011: Engr 2320: Mechanics Of Solids And Structures: Information About Course: Course Syllabus, Christopher Lee
Spring 2011: Engr 2320: Mechanics Of Solids And Structures: Information About Course: Course Syllabus, Christopher Lee
Christopher Lee
This course covers the principles of statics of structures and mechanics of materials. The focus is on the concepts of stress and strain as related to applied loads (axial, shear, torsion, bending) and to resulting deformation. Students will learn how the principles of mechanics can be applied to mechanical design through modeling, quantitative analysis, strain gauge measurements, and computational simulation. The use of a commercial finite element package is introduced.
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Course Materials: Assignment 5, Christopher Lee
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Course Materials: Assignment 5, Christopher Lee
Christopher Lee
A student team will work in the manner of a small engineering research and development company to develop a mechanical or aerospace system to address a current market need. A comprehensive system design will be developed based upon quantitative analysis using commercial simulation software. Prototypes systems will be fabricated, evaluated and refined to meet performance objectives. This semester will focus on the design and fabrication of a 'perching' landing gear system for a small autonomous or remotely controlled air vehicle. The landing gear will enable the air vehicle to grab a hold of and land upon tree branches. Mechanical aspects …
Fall 2010 Engr 3399: Mechanical And Aerospace Systems I: Course Material: Hopper Assignment, Christopher Lee
Fall 2010 Engr 3399: Mechanical And Aerospace Systems I: Course Material: Hopper Assignment, Christopher Lee
Christopher Lee
Techniques for the design and analysis of mechanical and aerospace systems are studied through case projects that involve both computational analysis and experimental measurements. Topics will be selected from a range of possible topics such as vibration analysis, flexible body dynamics, aerodynamics, and aeroelasticity. Projects may include the design and construction of vibration absorbers or ambient vibration energy harvesting systems, the dynamics and stability of aerospace vehicles, lift and drag of airfoils, the control of flutter instabilities of elastic structures, the design and flight testing of a lighter-than-air-vehicle, or mission planning of aeronautical or aerospace systems.
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Course Materials: Assignment 6, Christopher Lee
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Course Materials: Assignment 6, Christopher Lee
Christopher Lee
A student team will work in the manner of a small engineering research and development company to develop a mechanical or aerospace system to address a current market need. A comprehensive system design will be developed based upon quantitative analysis using commercial simulation software. Prototypes systems will be fabricated, evaluated and refined to meet performance objectives. This semester will focus on the design and fabrication of a 'perching' landing gear system for a small autonomous or remotely controlled air vehicle. The landing gear will enable the air vehicle to grab a hold of and land upon tree branches. Mechanical aspects …
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Information About Course: Course Schedule, Christopher Lee
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Information About Course: Course Schedule, Christopher Lee
Christopher Lee
This course covers the principles of statics of structures and mechanics of materials. The focus is on the concepts of stress and strain as related to applied loads (axial, shear, torsion, bending) and to resulting deformation. Students will learn how the principles of mechanics can be applied to mechanical design through modeling, quantitative analysis, strain gauge measurements, and computational simulation. The use of a commercial finite element package is introduced.
Fall 2010 Engr 3399: Mechanical And Aerospace Systems I: Course Material: Assignment 8, Christopher Lee
Fall 2010 Engr 3399: Mechanical And Aerospace Systems I: Course Material: Assignment 8, Christopher Lee
Christopher Lee
Techniques for the design and analysis of mechanical and aerospace systems are studied through case projects that involve both computational analysis and experimental measurements. Topics will be selected from a range of possible topics such as vibration analysis, flexible body dynamics, aerodynamics, and aeroelasticity. Projects may include the design and construction of vibration absorbers or ambient vibration energy harvesting systems, the dynamics and stability of aerospace vehicles, lift and drag of airfoils, the control of flutter instabilities of elastic structures, the design and flight testing of a lighter-than-air-vehicle, or mission planning of aeronautical or aerospace systems.
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Course Materials: Final Project Instructions, Christopher Lee
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Course Materials: Final Project Instructions, Christopher Lee
Christopher Lee
This course covers the principles of statics of structures and mechanics of materials. The focus is on the concepts of stress and strain as related to applied loads (axial, shear, torsion, bending) and to resulting deformation. Students will learn how the principles of mechanics can be applied to mechanical design through modeling, quantitative analysis, strain gauge measurements, and computational simulation. The use of a commercial finite element package is introduced.
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Course Materials: Robot Leg Exercise, Christopher Lee
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Course Materials: Robot Leg Exercise, Christopher Lee
Christopher Lee
This course covers the principles of statics of structures and mechanics of materials. The focus is on the concepts of stress and strain as related to applied loads (axial, shear, torsion, bending) and to resulting deformation. Students will learn how the principles of mechanics can be applied to mechanical design through modeling, quantitative analysis, strain gauge measurements, and computational simulation. The use of a commercial finite element package is introduced.
Fall 2010 Engr 3399: Mechanical And Aerospace Systems I: Course Material: Assignment 5, Christopher Lee
Fall 2010 Engr 3399: Mechanical And Aerospace Systems I: Course Material: Assignment 5, Christopher Lee
Christopher Lee
Techniques for the design and analysis of mechanical and aerospace systems are studied through case projects that involve both computational analysis and experimental measurements. Topics will be selected from a range of possible topics such as vibration analysis, flexible body dynamics, aerodynamics, and aeroelasticity. Projects may include the design and construction of vibration absorbers or ambient vibration energy harvesting systems, the dynamics and stability of aerospace vehicles, lift and drag of airfoils, the control of flutter instabilities of elastic structures, the design and flight testing of a lighter-than-air-vehicle, or mission planning of aeronautical or aerospace systems.
Fall 2010 Engr 3399: Mechanical And Aerospace Systems I: Course Material: Assignment 2, Christopher Lee
Fall 2010 Engr 3399: Mechanical And Aerospace Systems I: Course Material: Assignment 2, Christopher Lee
Christopher Lee
Techniques for the design and analysis of mechanical and aerospace systems are studied through case projects that involve both computational analysis and experimental measurements. Topics will be selected from a range of possible topics such as vibration analysis, flexible body dynamics, aerodynamics, and aeroelasticity. Projects may include the design and construction of vibration absorbers or ambient vibration energy harvesting systems, the dynamics and stability of aerospace vehicles, lift and drag of airfoils, the control of flutter instabilities of elastic structures, the design and flight testing of a lighter-than-air-vehicle, or mission planning of aeronautical or aerospace systems.
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Information About Course: Course Syllabus, Christopher Lee
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Information About Course: Course Syllabus, Christopher Lee
Christopher Lee
A student team will work in the manner of a small engineering research and development company to develop a mechanical or aerospace system to address a current market need. A comprehensive system design will be developed based upon quantitative analysis using commercial simulation software. Prototypes systems will be fabricated, evaluated and refined to meet performance objectives. This semester will focus on the design and fabrication of a 'perching' landing gear system for a small autonomous or remotely controlled air vehicle. The landing gear will enable the air vehicle to grab a hold of and land upon tree branches. Mechanical aspects …
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Course Materials: Assignment 1, Christopher Lee
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Course Materials: Assignment 1, Christopher Lee
Christopher Lee
A student team will work in the manner of a small engineering research and development company to develop a mechanical or aerospace system to address a current market need. A comprehensive system design will be developed based upon quantitative analysis using commercial simulation software. Prototypes systems will be fabricated, evaluated and refined to meet performance objectives. This semester will focus on the design and fabrication of a 'perching' landing gear system for a small autonomous or remotely controlled air vehicle. The landing gear will enable the air vehicle to grab a hold of and land upon tree branches. Mechanical aspects …
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Course Materials: Exam 1, Christopher Lee
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Course Materials: Exam 1, Christopher Lee
Christopher Lee
This course covers the principles of statics of structures and mechanics of materials. The focus is on the concepts of stress and strain as related to applied loads (axial, shear, torsion, bending) and to resulting deformation. Students will learn how the principles of mechanics can be applied to mechanical design through modeling, quantitative analysis, strain gauge measurements, and computational simulation. The use of a commercial finite element package is introduced.
Fall 2010 Engr 3399: Mechanical And Aerospace Systems I: Course Material: Assignment 7, Christopher Lee
Fall 2010 Engr 3399: Mechanical And Aerospace Systems I: Course Material: Assignment 7, Christopher Lee
Christopher Lee
Techniques for the design and analysis of mechanical and aerospace systems are studied through case projects that involve both computational analysis and experimental measurements. Topics will be selected from a range of possible topics such as vibration analysis, flexible body dynamics, aerodynamics, and aeroelasticity. Projects may include the design and construction of vibration absorbers or ambient vibration energy harvesting systems, the dynamics and stability of aerospace vehicles, lift and drag of airfoils, the control of flutter instabilities of elastic structures, the design and flight testing of a lighter-than-air-vehicle, or mission planning of aeronautical or aerospace systems.
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Course Materials: Final Exam, Christopher Lee
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Course Materials: Final Exam, Christopher Lee
Christopher Lee
This course covers the principles of statics of structures and mechanics of materials. The focus is on the concepts of stress and strain as related to applied loads (axial, shear, torsion, bending) and to resulting deformation. Students will learn how the principles of mechanics can be applied to mechanical design through modeling, quantitative analysis, strain gauge measurements, and computational simulation. The use of a commercial finite element package is introduced.
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Course Materials: Assignment 3, Christopher Lee
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Course Materials: Assignment 3, Christopher Lee
Christopher Lee
A student team will work in the manner of a small engineering research and development company to develop a mechanical or aerospace system to address a current market need. A comprehensive system design will be developed based upon quantitative analysis using commercial simulation software. Prototypes systems will be fabricated, evaluated and refined to meet performance objectives. This semester will focus on the design and fabrication of a 'perching' landing gear system for a small autonomous or remotely controlled air vehicle. The landing gear will enable the air vehicle to grab a hold of and land upon tree branches. Mechanical aspects …
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Course Materials: Exam 2, Christopher Lee
Spring 2011 Engr 2320: Mechanics Of Solids And Structures: Course Materials: Exam 2, Christopher Lee
Christopher Lee
This course covers the principles of statics of structures and mechanics of materials. The focus is on the concepts of stress and strain as related to applied loads (axial, shear, torsion, bending) and to resulting deformation. Students will learn how the principles of mechanics can be applied to mechanical design through modeling, quantitative analysis, strain gauge measurements, and computational simulation. The use of a commercial finite element package is introduced.
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Course Materials: Assignment 8, Christopher Lee
Spring 2011 Engr 3399: Mechanical And Aerospace Systems Ii: Course Materials: Assignment 8, Christopher Lee
Christopher Lee
A student team will work in the manner of a small engineering research and development company to develop a mechanical or aerospace system to address a current market need. A comprehensive system design will be developed based upon quantitative analysis using commercial simulation software. Prototypes systems will be fabricated, evaluated and refined to meet performance objectives. This semester will focus on the design and fabrication of a 'perching' landing gear system for a small autonomous or remotely controlled air vehicle. The landing gear will enable the air vehicle to grab a hold of and land upon tree branches. Mechanical aspects …
Work In Progress - Role Of Faculty In Promoting Lifelong Learning, Jonathon Stolk, Susan M. Lord, Candice Stefanou, John Chen, Katharyn E. K. Nottis, Michael J. Prince
Work In Progress - Role Of Faculty In Promoting Lifelong Learning, Jonathon Stolk, Susan M. Lord, Candice Stefanou, John Chen, Katharyn E. K. Nottis, Michael J. Prince
Michael J. Prince
Students’ development of self-directed and lifelong learning capacities is vital for their success in today’s engineering environment. Instructors play a critical role in influencing outcomes related to self-directed learning (SDL) through their design of courses that support students’ transitions from controlled to autonomous learning behaviors. Yet there is a critical lack of research examining how instructor choices promote self-directed (and eventually lifelong) learning development in undergraduate engineering students. In this work in progress, we introduce a project that explores how instructor choices affect a range of student outcomes related to their development as self-directed and lifelong learners. Drawing on existing …
Work In Progress - Role Of Faculty In Promoting Lifelong Learning: Initial Findings, John Chen, Susan M. Lord, Katharyn Nottis, Michael Prince, Candice Stefanou, Jonathon Stolk
Work In Progress - Role Of Faculty In Promoting Lifelong Learning: Initial Findings, John Chen, Susan M. Lord, Katharyn Nottis, Michael Prince, Candice Stefanou, Jonathon Stolk
Michael J. Prince
Calls for educational reform emphasize the need for student-centered learning approaches that foster lifelong learning. To be a lifelong learner includes characteristics consistent with those of self-directed learners, such as being curious, motivated, reflective, analytical, persistent, flexible, and independent. Instructor support of students’ self-directed learning (SDL) development relies on understanding and balancing these factors in the classroom. Engineering educators play a critical role in influencing outcomes related to SDL through their design of courses that support students’ transitions from controlled to autonomous learning behaviors. This study will examine a variety of engineering courses and pedagogical approaches. Each will be characterized …
Role Of Faculty In Promoting Lifelong Learning: Characterizing Classroom Environments, Susan M. Lord, John Chen, Katharyn E. K. Nottis, Candice Stefanou, Michael J. Prince, Jonathon Stolk
Role Of Faculty In Promoting Lifelong Learning: Characterizing Classroom Environments, Susan M. Lord, John Chen, Katharyn E. K. Nottis, Candice Stefanou, Michael J. Prince, Jonathon Stolk
Michael J. Prince
Calls for educational reform emphasize the need for student-centered learning approaches that foster lifelong learning. To be a lifelong learner includes characteristics consistent with those of self-directed learners, such as being curious, motivated, reflective, analytical, persistent, flexible, and independent. Educational research has shown that the building of these aptitudes involves a complex interplay among nearly every aspect of human development. Instructor support of students’ self-directed learning (SDL) development relies on understanding and balancing these factors in the classroom. Engineering educators play a critical role in influencing outcomes related to SDL through their design of courses that support students’ transitions from …
Impulsive Displacement Of A Liquid In A Pipe At High Reynolds Numbers, Gerald G. Kleinstein
Impulsive Displacement Of A Liquid In A Pipe At High Reynolds Numbers, Gerald G. Kleinstein
Gerald G. Kleinstein
We consider the problem of an impulsive displacement of a liquid, originally at rest in a circular pipe, which is displaced by another liquid. The purpose of this analysis is to show that at a sufficiently high inertia the initial essentially inviscid motion can be extended to cover the entire displacement process, thus creating an inviscid window to which an inviscid analysis can be applied. We simplify the problem first, by considering a 1-liquid problem where the displacing liquid and displaced liquid are the same. We identify two characteristic times in this problem: the time it takes an inviscid liquid …
Pandaa: A Physical Arrangement Detection Technique For Networked Devices Through Ambient-Sound Awareness, Zheng Sun, Aveek Purohit, Philippe De Wagter, Irina Brinster, Chorom Hamm, Pei Zhang
Pandaa: A Physical Arrangement Detection Technique For Networked Devices Through Ambient-Sound Awareness, Zheng Sun, Aveek Purohit, Philippe De Wagter, Irina Brinster, Chorom Hamm, Pei Zhang
Zheng Sun
This demo presents PANDAA, a zero-configuration automatic spatial localization technique for networked devices based on ambient sound sensing. We will demonstrate that after initial placement of the devices, ambient sounds, such as human speech, music, footsteps, finger snaps, hand claps, or coughs and sneezes, can be used to autonomously resolve the spatial relative arrangement of devices, such as mobile phones, using trigonometric bounds and successive approximation.
The Explosion In Mari, Cyprus, The Cost Of Power Shortages, And Policy Recommendations, Theodoros Zachariadis, Panos Pashardes, Nicoletta Pashourtidou
The Explosion In Mari, Cyprus, The Cost Of Power Shortages, And Policy Recommendations, Theodoros Zachariadis, Panos Pashardes, Nicoletta Pashourtidou
Theodoros Zachariadis
No abstract provided.
Desalination Powered By Entropy, Sanza Kazadi, Young Hong, Calvin Chau, Apoorv Chaudhary, Arnav Chaudhary, James Park, Jessica Liu, Miji Kim, David Kim, Sam Kim
Desalination Powered By Entropy, Sanza Kazadi, Young Hong, Calvin Chau, Apoorv Chaudhary, Arnav Chaudhary, James Park, Jessica Liu, Miji Kim, David Kim, Sam Kim
Sanza Kazadi
Analytical Solutions For Nonlinear Lateral Sloshing In Partiallyfilled Elliptical Tankers, Hassan Askari
Analytical Solutions For Nonlinear Lateral Sloshing In Partiallyfilled Elliptical Tankers, Hassan Askari
No abstract provided.
Optimization Of The Acoustic Performance Of Polyimide Foams, Olivier Doutres, Noureddine Atalla, Rebecca Wulliman, Shari Ferguson, Steve Bailey
Optimization Of The Acoustic Performance Of Polyimide Foams, Olivier Doutres, Noureddine Atalla, Rebecca Wulliman, Shari Ferguson, Steve Bailey
Olivier Doutres Ph.D.
Due to their low weight, high fire resistance and good mechanical strength, SOLIMIDE® Polyimide foams are good candidates for sound packages in aerospace sound transmission applications. However, their high resistance to airflow limits the sound absorption efficiency inside a double wall structure and thus the sound transmission loss of the structure. The paper discusses two concepts to improve the transmission efficiency of such materials for double wall applications: (i) improving its sound absorption behavior by removing mechanically or chemically the cell membranes and thus decreasing both the flow resistance and tortuosity, (ii) coupling the Polyimide foams to screens (porous or …
A Practical Impedance Tube Method To Estimate The Normal Incidence Sound Transmission Loss Of Double Wall Structure, Olivier Doutres, Noureddine Atalla
A Practical Impedance Tube Method To Estimate The Normal Incidence Sound Transmission Loss Of Double Wall Structure, Olivier Doutres, Noureddine Atalla
Olivier Doutres Ph.D.
The objective of this paper is to propose a practical impedance tube method to optimize the sound transmission loss of double wall structure by concentrating on the sound package placed inside the structure. In a previous work, the authors derived an expression that breaks down the transmission loss of a double wall structure containing a sound absorbing blanket separated from the panels by air layers in terms of three main contributions; (i) sound transmission loss of the panels, (ii) sound transmission loss of the blanket and (iii) sound absorption due to multiple reflections inside the cavity. The sound transmission loss …
Thermal Conductivity Reduction Through Isotope Substitution In Nanomaterials: Predictions From An Analytical Classical Model And Nonequilibrium Molecular Dynamics Simulations, Ganesh Balasubramanian, Ishwar K. Puri, Michael C. Bohm, Frederic Leroy
Thermal Conductivity Reduction Through Isotope Substitution In Nanomaterials: Predictions From An Analytical Classical Model And Nonequilibrium Molecular Dynamics Simulations, Ganesh Balasubramanian, Ishwar K. Puri, Michael C. Bohm, Frederic Leroy
Ganesh Balasubramanian
We introduce an analytical model to rapidly determine the thermal conductivity reduction due to mass disorder in nanomaterials. Although this simplified classical model depends only on the masses of the different atoms, it adequately describes the changes in thermal transport as the concentrations of these atoms vary. Its predictions compare satisfactorily with nonequilibrium molecular dynamics simulations of the thermal conductivity of 14C–12C carbon nanotubes as well as with previous simulations of other materials. We present it as a simple tool to quantitatively estimate the thermal conductivity decrease that is induced by isotope substitution in various materials.
Heat Conduction Across A Solid-Solid Interface: Understanding Nanoscale Interfacial Effects On Thermal Resistance, Ganesh Balasubramanian, Ishwar K. Puri
Heat Conduction Across A Solid-Solid Interface: Understanding Nanoscale Interfacial Effects On Thermal Resistance, Ganesh Balasubramanian, Ishwar K. Puri
Ganesh Balasubramanian
Phonons scatter and travel ballistically in systems smaller than the phonon mean free path. At larger lengths, the transport is instead predominantly diffusive. We employ molecular dynamics simulations to describe the length dependence of the thermal conductivity. The simulations show that the interfacial thermal resistance Rk for a Si-Ge superlattice is inversely proportional to its length, but reaches a constant value as the system dimension becomes larger than the phonon mean free path. This nanoscale effect is incorporated into an accurate continuum model by treating the interface as a distinct material with an effective thermal resistance equal to Rk .