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Effects Of Middle Plane Curvature On Vibrations Of A Thickness-Shear Mode Crystal Resonator, J. S. Yang, Xiaomeng Yang, Joseph A. Turner, John A. Kosinski, Robert A. Pastore, Weiping Zhang Oct 2006

Effects Of Middle Plane Curvature On Vibrations Of A Thickness-Shear Mode Crystal Resonator, J. S. Yang, Xiaomeng Yang, Joseph A. Turner, John A. Kosinski, Robert A. Pastore, Weiping Zhang

Faculty Publications from the Department of Engineering Mechanics

We study the effects of a small curvature of the middle plane of a thickness-shear mode crystal plate resonator on its vibration frequencies, modes and acceleration sensitivity. Two-dimensional equations for coupled thickness-shear, flexural and extensional vibrations of a shallow shell are used. The equations are simplified to a single equation for thickness-shear, and two equations for coupled thickness-shear and extension. Equations with different levels of coupling are used to study vibrations of rotated Y-cut quartz and langasite resonators. The influence of the middle plane curvature and coupling to extension is examined. The effect of middle plane curvature on normal acceleration ...


Role Of Atomic Scale Interfaces In The Compressive Behavior Of Carbon Nanotubes In Composites, S. Namilae, Namas Chandra Oct 2006

Role Of Atomic Scale Interfaces In The Compressive Behavior Of Carbon Nanotubes In Composites, S. Namilae, Namas Chandra

Faculty Publications from the Department of Engineering Mechanics

Carbon nanotubes (CNT) are potentially promising fibers for ultra high strength composites. In order to fully har-ness the outstanding mechanical properties of carbon nanotubes as fiber reinforcements, it is essential to understand the nature of load transfer between fiber and matrix under various types of loading conditions that include tension, compression, torsion and a combination thereof. In this paper, we study the compressive behavior (buckling and post-buckling) of carbon nanotubes in the neat form, when they are embedded in polyethylene matrix and with in¬terface chemical modifications using molecular dynamics simulations based on Tersoff–Brenner potential. It is ob¬served ...


Modeling And Simulation Of The Interaction Between Lubricant Droplets On The Slider Surface And Air Flow Within The Head/Disk Interface Of Disk Drives, Lin Wu Oct 2006

Modeling And Simulation Of The Interaction Between Lubricant Droplets On The Slider Surface And Air Flow Within The Head/Disk Interface Of Disk Drives, Lin Wu

Mechanical & Materials Engineering Faculty Publications

The dynamic interaction phenomenon between three-dimensional (3-D) lubricant droplets located on the air bearing surface and air flow within the head-disk interface is modeled and numerically simulated. A strong interaction is observed for ultra low flying slider design. The droplet motion and deformation are able to induce non-negligible air bearing force and moment change, which in turn may impose a non-negligible disturbance on the slider’s flying attitude.


Load Transfer Issues In The Tensile And Compressive Behavior Of Multiwall Carbon Nanotubes, G. A. Shen, S. Namilae, Namas Chandra Aug 2006

Load Transfer Issues In The Tensile And Compressive Behavior Of Multiwall Carbon Nanotubes, G. A. Shen, S. Namilae, Namas Chandra

Mechanical & Materials Engineering Faculty Publications

Carbon nanotubes (CNT) are considered to be ultra strong and stiff reinforcements for structural composite applications. The load transfer between the inner and outer nanotubes in multiwall carbon nanotubes (MWCNT) has to be clearly understood to realize their potential in not only composites, but also other applications such as nano-springs and nano-bearings. In this paper, we study the load transfer between the walls of multiwall nanotubes both in tension and compression using molecular dynamics simulations. It is found that very minimal load is transferred to the inner nanotube during tension. The load transfer in compression of capped nanotubes is much ...


Preparation Of High-Strength Nanometer Scale Twinned Coating And Foil, Xinghang Zhang, Amit Misra, Michael Nastasi, Richard G. Hoagland Jul 2006

Preparation Of High-Strength Nanometer Scale Twinned Coating And Foil, Xinghang Zhang, Amit Misra, Michael Nastasi, Richard G. Hoagland

Mechanical & Materials Engineering Faculty Publications

Very high strength single phase stainless steel coating has been prepared by magnetron sputtering onto a substrate. The coating has a unique microstructure of nanometer spaced twins that are parallel to each other and to the substrate surface. For cases where the coating and substrate do not bind strongly, the coating can be peeled off to provide foil.


Droplet On A Fiber: Geometrical Shape And Contact Angle, Xiangfa Wu, Yuris A. Dzenis Jul 2006

Droplet On A Fiber: Geometrical Shape And Contact Angle, Xiangfa Wu, Yuris A. Dzenis

Faculty Publications from the Department of Engineering Mechanics

This paper is concerned with the geometrical shape, wetting length, and contact angle of a microdroplet on a fiber by using the method free energy variation. The governing equation and relevant boundary conditions of the microdroplet were re-derived based on the free energy variation of the droplet/ fiber system. The geometrical shape of the droplet was determined as the combination of Legendre’s elliptical functions of the first and second kinds, corresponding to the previous results in literature [6]. For contact angle h >15 degree, a novel efficient semi-analytic approach was proposed to extract the contact angle from experimental data ...


Steady-Periodic Green’S Functions And Thermal- Measurement Applications In Rectangular Coordinates, Kevin . D. Cole Jul 2006

Steady-Periodic Green’S Functions And Thermal- Measurement Applications In Rectangular Coordinates, Kevin . D. Cole

Mechanical & Materials Engineering Faculty Publications

Methods of thermal property measurements based on steady-periodic heating are indirect techniques, in which the thermal properties are deduced from a systematic comparison between experimental data and heat-transfer theory. In this paper heat-transfer theory is presented for a variety of two-dimensional geometries applicable to steady-periodic thermal-property techniques. The method of Green’s functions is used to systematically treat rectangles, slabs (two dimensional), and semi-infinite bodies. Several boundary conditions are treated, including convection and boundaries containing a thin, highconductivity film. The family of solutions presented here provides an opportunity for verification of numerical results by the use of distinct, but similar ...


Microrobot For Surgical Applications: United States Patent No. Us 7,042,184 B2, Dmitry Oleynikov, Shane Farritor, Adnan Hadzialic, Stephen R. Platt May 2006

Microrobot For Surgical Applications: United States Patent No. Us 7,042,184 B2, Dmitry Oleynikov, Shane Farritor, Adnan Hadzialic, Stephen R. Platt

Mechanical & Materials Engineering Faculty Publications

The present invention provides a micro-robot for use inside the body during minimally-invasive surgery. The microrobot may include various sensors, imaging devices or manipulators.


Raghavan, V., Gogos, G., Babu, V. And Sundararajan, T., “Effect Of Gravity On Methanol Diffusion Flames Burning Within A Forced Convective Environment”, Accepted For Publication In International Communications In Heat And Mass Transfer (2006) Mar 2006

Raghavan, V., Gogos, G., Babu, V. And Sundararajan, T., “Effect Of Gravity On Methanol Diffusion Flames Burning Within A Forced Convective Environment”, Accepted For Publication In International Communications In Heat And Mass Transfer (2006)

Combustion Research at University of Nebraska-Lincoln

No abstract provided.


Pope, D. And Gogos, G. "Numerical Simulation Of Fuel Droplet Extinction Due To Forced Convection," Combustion And Flame, 142:89-106 (2005) Feb 2006

Pope, D. And Gogos, G. "Numerical Simulation Of Fuel Droplet Extinction Due To Forced Convection," Combustion And Flame, 142:89-106 (2005)

Combustion Research at University of Nebraska-Lincoln

No abstract provided.


Raghavan, V., Pope, D.N. And Gogos, G. “Effects Of Forced Convection And Surface Tension During Methanol Droplet Convection,” Aiaa Journal Of Thermophysics And Heat Transfer, Accepted (2006) Feb 2006

Raghavan, V., Pope, D.N. And Gogos, G. “Effects Of Forced Convection And Surface Tension During Methanol Droplet Convection,” Aiaa Journal Of Thermophysics And Heat Transfer, Accepted (2006)

Combustion Research at University of Nebraska-Lincoln

No abstract provided.


Pope, D.N. And Gogos G. “A New Multicomponent Diffusion Formulation For The Finite-Volume Method: Application To Convective Droplet Combustion,” Numerical Heat Transfer, Part B Fundamentals, Part B, 48, 3:213-234, (2005) Feb 2006

Pope, D.N. And Gogos G. “A New Multicomponent Diffusion Formulation For The Finite-Volume Method: Application To Convective Droplet Combustion,” Numerical Heat Transfer, Part B Fundamentals, Part B, 48, 3:213-234, (2005)

Combustion Research at University of Nebraska-Lincoln

No abstract provided.


Pope, D.N., Howard, D., Lu, K. And Gogos, G. “Combustion Of Moving Droplets And Suspended Droplets: Transient Numerical Results,” Aiaa Journal Of Thermophysics And Heat Transfer, 19:273-281 (2005) Feb 2006

Pope, D.N., Howard, D., Lu, K. And Gogos, G. “Combustion Of Moving Droplets And Suspended Droplets: Transient Numerical Results,” Aiaa Journal Of Thermophysics And Heat Transfer, 19:273-281 (2005)

Combustion Research at University of Nebraska-Lincoln

No abstract provided.


Raghavan, V., Pope, D.N., Howard, D. And Gogos, G. “Surface Tension Effects During Low Reynolds Number Methanol Droplet Combustion,” Combustion And Flame, Accepted (2006) Feb 2006

Raghavan, V., Pope, D.N., Howard, D. And Gogos, G. “Surface Tension Effects During Low Reynolds Number Methanol Droplet Combustion,” Combustion And Flame, Accepted (2006)

Combustion Research at University of Nebraska-Lincoln

No abstract provided.


Test 1870: John Deere 5103 Diesel 9-Speed, Tractor Museum Jan 2006

Test 1870: John Deere 5103 Diesel 9-Speed, Tractor Museum

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of ...


Test 1871: John Deere 5203 Diesel 9-Speed, Tractor Museum Jan 2006

Test 1871: John Deere 5203 Diesel 9-Speed, Tractor Museum

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of ...


Test 1872: John Deere 5303 Diesel 9-Speed, Tractor Museum Jan 2006

Test 1872: John Deere 5303 Diesel 9-Speed, Tractor Museum

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of ...


Test 1884: John Deere 8130 Diesel 16-Speed, Tractor Museum Jan 2006

Test 1884: John Deere 8130 Diesel 16-Speed, Tractor Museum

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of ...


Test 1885: John Deere 8230 Diesel 16-Speed, Tractor Museum Jan 2006

Test 1885: John Deere 8230 Diesel 16-Speed, Tractor Museum

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of ...


Test 1886: John Deere 8230t Diesel 16-Speed, Tractor Museum Jan 2006

Test 1886: John Deere 8230t Diesel 16-Speed, Tractor Museum

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of ...


Test 1888: John Deere 8330t Diesel 16-Speed, Tractor Museum Jan 2006

Test 1888: John Deere 8330t Diesel 16-Speed, Tractor Museum

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of ...


Test 1887: John Deere 8330 Diesel 16-Speed, Tractor Museum Jan 2006

Test 1887: John Deere 8330 Diesel 16-Speed, Tractor Museum

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of ...


Nebraska Summary 559: Massey Ferguson 5470 Dyna 4 Diesel 16-Speed, Tractor Museum Jan 2006

Nebraska Summary 559: Massey Ferguson 5470 Dyna 4 Diesel 16-Speed, Tractor Museum

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA

The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.

EXPLANATION OF THE TEST PROCEDURES

Purpose

The purpose of ...


Test 1883: Agco Lt75a Diesel, Nebraska Tractor Test Laboratory Submitted By Larsen Museum Jan 2006

Test 1883: Agco Lt75a Diesel, Nebraska Tractor Test Laboratory Submitted By Larsen Museum

Nebraska Tractor Tests

No abstract provided.


Test 1889: John Deere 8430t 16 Speed Jan 2006

Test 1889: John Deere 8430t 16 Speed

Nebraska Tractor Tests

No abstract provided.


Test 1890: John Deere 8530 Ivt, Tractor Museum, John Deere Jan 2006

Test 1890: John Deere 8530 Ivt, Tractor Museum, John Deere

Nebraska Tractor Tests

No abstract provided.


Test 1873: John Deere 8430 16 Speed Jan 2006

Test 1873: John Deere 8430 16 Speed

Nebraska Tractor Tests

No abstract provided.


Test 1874: John Deere 8430 Ivt Jan 2006

Test 1874: John Deere 8430 Ivt

Nebraska Tractor Tests

No abstract provided.


Test 1880: Mccormick Xtx 185/Mccormick Mtx 165 Diesel Jan 2006

Test 1880: Mccormick Xtx 185/Mccormick Mtx 165 Diesel

Nebraska Tractor Tests

No abstract provided.


Test 1881: Mccormick Xtx 200/Mtx 185 Diesel Jan 2006

Test 1881: Mccormick Xtx 200/Mtx 185 Diesel

Nebraska Tractor Tests

No abstract provided.