Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Department of Mechanical Engineering-Engineering Mechanics (18)
- Department of Materials Science and Engineering (3)
- Attenuation (2)
- Department of Chemical Engineering (2)
- Department of Electrical and Computer Engineering (2)
-
- Engineering (2)
- Independent scattering approximation (2)
- Multiple scattering (2)
- Open hardware (2)
- Open source (2)
- Ultrasound (2)
- 3D printing (1)
- Additive manufacturing (1)
- Air-powered (1)
- Animal model (1)
- Building predictive control (1)
- CFD (1)
- Characterization and analytical techniques (1)
- Cider press (1)
- Classification (1)
- Combustion vessel (1)
- Compression ignition (CI) (1)
- Computational simulation (1)
- Concrete delamination (1)
- Content analysis (1)
- Convolutional long short-term memory (CLSTM) neural network (1)
- DME (dimethly ether) (1)
- Dehydration (1)
- Department of Biological Sciences (1)
- Department of Geological and Mining Engineering and Sciences (1)
Articles 1 - 23 of 23
Full-Text Articles in Engineering
Me-Em Enewsbrief, September 2021, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Me-Em Enewsbrief, September 2021, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics eNewsBrief
No abstract provided.
Mechanical Properties And Characterization Of Epoxy Composites Containing Highly Entangled As-Received And Acid Treated Carbon Nanotubes, Aaron Krieg, Julia A. King, Gregory M. Odegard, Timothy Leftwich, Leif K. Odegard, Paul D. Fraley, Ibrahim Miskioglu, Claire Jolowsky, Matthew Lundblad, Jin Gyu Park, Richard Liang
Mechanical Properties And Characterization Of Epoxy Composites Containing Highly Entangled As-Received And Acid Treated Carbon Nanotubes, Aaron Krieg, Julia A. King, Gregory M. Odegard, Timothy Leftwich, Leif K. Odegard, Paul D. Fraley, Ibrahim Miskioglu, Claire Jolowsky, Matthew Lundblad, Jin Gyu Park, Richard Liang
Michigan Tech Publications
Huntsman–Merrimack MIRALON® carbon nanotubes (CNTs) are a novel, highly entan-gled, commercially available, and scalable format of nanotubes. As-received and acid-treated CNTs were added to aerospace grade epoxy (CYCOM® 977-3), and the composites were characterized. The epoxy resin is expected to infiltrate the network of the CNTs and could improve mechanical properties. Epoxy composites were tested for flexural and viscoelastic properties and the as-re-ceived and acid treated CNTs were characterized using Field-Emission Scanning and Transmission Electron Microscopy, X-Ray Photoelectron Spectroscopy, and Thermogravimetric Analysis. Composites containing 0.4 wt% as-received CNTs showed an increase in flexural strength, from 136.9 MPa for neat epoxy …
Synthesis And Biomedical Applications Of Functional Polymers, Jianxun Ding, Di Li, Jingxiao Chen, Chao Zhao, Parisa Pour Shahid Saeed Abadi
Synthesis And Biomedical Applications Of Functional Polymers, Jianxun Ding, Di Li, Jingxiao Chen, Chao Zhao, Parisa Pour Shahid Saeed Abadi
Michigan Tech Publications
No abstract provided.
Dynamic Aeroelastic Response Of Stall-Controlled Wind Turbine Rotors In Turbulent Wind Conditions, Sara Jalal, Fernando L. Ponta, Apurva Baruah, Anurag Rajan
Dynamic Aeroelastic Response Of Stall-Controlled Wind Turbine Rotors In Turbulent Wind Conditions, Sara Jalal, Fernando L. Ponta, Apurva Baruah, Anurag Rajan
Michigan Tech Publications
With the current global trend of the wind turbines to be commissioned, the next generation of state-of-the-art turbines will have a generating capacity of 20 MW with rotor diameters of 250 m or larger. This systematic increase in rotor size is prompted by economies-of-scale factors, thereby resulting in a continuously decreasing cost per kWh generated. However, such large rotors have larger masses associated with them and necessitate studies in order to better understand their dynamics. The present work regarding the aeroelastic behavior of stall-controlled rotors involves the study of the frequency content and time evolution of their oscillatory behavior. A …
Early-Stage Gas Identification Using Convolutional Long Short-Term Neural Network With Sensor Array Time Series Data, Kai Zhou, Yixin Liu
Early-Stage Gas Identification Using Convolutional Long Short-Term Neural Network With Sensor Array Time Series Data, Kai Zhou, Yixin Liu
Michigan Tech Publications
Gas identification/classification through pattern recognition techniques based on gas sensor arrays often requires the equilibrium responses or the full traces of time-series data of the sensor array. Leveraging upon the diverse gas sensing kinetics behaviors measured via the sensor array, a computational intelligence-based meta-model is proposed to automatically conduct the feature extraction and subsequent gas identification using time-series data during the transitional phase before reaching equilibrium. The time-series data contains implicit temporal dependency/correlation that is worth being characterized to enhance the gas identification performance and reliability. In this context, a tailored approach so-called convolutional long short-term memory (CLSTM) neural network …
A Simple Gas-Kinetic Model For Dilute And Weakly Charged Plasma Micro-Jet Flows, Shiying Cai, Chunpei Cai
A Simple Gas-Kinetic Model For Dilute And Weakly Charged Plasma Micro-Jet Flows, Shiying Cai, Chunpei Cai
Michigan Tech Publications
This paper presents a simple model for slightly charged gas expanding into a vacuum from a planar exit. The number density, bulk velocity, temperature, and potential at the exit are given. The electric field force is assumed weaker than the convection term and is neglected in the analysis. As such, the quasi-neutral condition is naturally adopted and the potential field is computed with the Boltzmann relation. At far field, the exit degenerates as a point source, and simplified analytical formulas for flow and electric fields are obtained. The results are generic and offer insights on many existing models in the …
Wetting Simulations Of High-Performance Polymer Resins On Carbon Surfaces As A Function Of Temperature Using Molecular Dynamics, Swapnil S. Bamane, Prashik S. Gaikwad, Matthew Radue, S. Gowtham, Gregory M. Odegard
Wetting Simulations Of High-Performance Polymer Resins On Carbon Surfaces As A Function Of Temperature Using Molecular Dynamics, Swapnil S. Bamane, Prashik S. Gaikwad, Matthew Radue, S. Gowtham, Gregory M. Odegard
Michigan Tech Publications
Resin/reinforcement wetting is a key parameter in the manufacturing of carbon nanotube (CNT)-based composite materials. Determining the contact angle between combinations of liquid resin and reinforcement surfaces is a common method for quantifying wettability. As experimental measurement of contact angle can be difficult when screening multiple high-performance resins with CNT materials such as CNT bundles or yarns, computational approaches are necessary to fa-cilitate CNT composite material design. A molecular dynamics simulation method is developed to predict the contact angle of high-performance polymer resins on CNT surfaces dominated by aromatic carbon, aliphatic carbon, or a mixture thereof (amorphous carbon). Several resin …
Multiscale Modeling Of Epoxy-Based Nanocomposites Reinforced With Functionalized And Non-Functionalized Graphene Nanoplatelets, Hashim Al Mahmud, Matthew Radue, Sorayot Chinkanjanarot, Gregory M. Odegard
Multiscale Modeling Of Epoxy-Based Nanocomposites Reinforced With Functionalized And Non-Functionalized Graphene Nanoplatelets, Hashim Al Mahmud, Matthew Radue, Sorayot Chinkanjanarot, Gregory M. Odegard
Michigan Tech Publications
The impact on the mechanical properties of an epoxy resin reinforced with pristine graphene nanoplatelets (GNP), highly concentrated graphene oxide (GO), and functionalized graphene oxide (FGO) has been investigated in this study. Molecular dynamics (MD) using a reactive force field (ReaxFF) has been employed in predicting the effective mechanical properties of the interphase region of the three nanocomposite materials at the nanoscale level. A systematic computational approach to simulate the reinforcing nanoplatelets and probe their influence on the mechanical properties of the epoxy matrix is established. The modeling results indicate a significant degradation of the in-plane elastic Young’s (decreased by …
Me-Em Enewsbrief, June 2021, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Me-Em Enewsbrief, June 2021, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics eNewsBrief
No abstract provided.
Frequency Domain Measurements Of Melt Pool Recoil Force Using Modal Analysis, Tristan Cullom, Cody Lough, Nicholas Altese, Douglas Bristow, Robert Landers, Ben Brown, Troy Hartwig, Andrew Barnard, Jason Blough, Kevin Johnson, Edward Kinzel
Frequency Domain Measurements Of Melt Pool Recoil Force Using Modal Analysis, Tristan Cullom, Cody Lough, Nicholas Altese, Douglas Bristow, Robert Landers, Ben Brown, Troy Hartwig, Andrew Barnard, Jason Blough, Kevin Johnson, Edward Kinzel
Michigan Tech Publications
Recoil pressure is a critical factor affecting the melt pool dynamics during Laser Powder Bed Fusion (LPBF) processes. Recoil pressure depresses the melt pool. When the recoil pressure is low, thermal conduction and capillary forces may be inadequate to provide proper fusion between layers. However, excessive recoil pressure can produce a keyhole inside the melt pool, which is associated with gas porosity. Direct recoil pressure measurements are challenging because it is localized over an area proportionate to the laser spot size producing a force in the mN range. This paper reports a vibration-based approach to quantify the recoil force exerted …
Open Source Vacuum Oven Design For Low-Temperature Drying: Performance Evaluation For Recycled Pet And Biomass, Benjamin R. Hubbard, Lindsay I. Putman, Stephen Techtmann, Joshua M. Pearce
Open Source Vacuum Oven Design For Low-Temperature Drying: Performance Evaluation For Recycled Pet And Biomass, Benjamin R. Hubbard, Lindsay I. Putman, Stephen Techtmann, Joshua M. Pearce
Michigan Tech Publications
Vacuum drying can dehydrate materials further than dry heat methods, while protecting sensitive materials from thermal degradation. Many industries have shifted to vacuum drying as cost-or time-saving measures. Small-scale vacuum drying, however, has been limited by the high costs of specialty scientific tools. To make vacuum drying more accessible, this study provides design and performance information for a small-scale open source vacuum oven, which can be fabricated from off-the-shelf and 3-D printed components. The oven is tested for drying speed and effectiveness on both waste plastic polyethylene terephthalate (PET) and a consortium of bacteria developed for bioprocessing of terephthalate wastes …
Solid–Liquid Interface Temperature Measurement Of Evaporating Droplet Using Thermoresponsive Polymer Aqueous Solution, Hyung Ju Lee, Chan Ho Jeong, Dae Yun Kim, Chang Kyoung Choi, Seong Hyuk Lee
Solid–Liquid Interface Temperature Measurement Of Evaporating Droplet Using Thermoresponsive Polymer Aqueous Solution, Hyung Ju Lee, Chan Ho Jeong, Dae Yun Kim, Chang Kyoung Choi, Seong Hyuk Lee
Michigan Tech Publications
The present study aims to measure the solid–liquid interface temperature of an evaporating droplet on a heated surface using a thermoresponsive polymer. Poly(N-isopropylacrylamide) (pNIPAM) was used owing to its sensitive optical and mechanical properties to the temperature. We also measured the refractive index variation of the pNIPAM solution by using the surface plasmon resonance imaging (SPRi). In particular, the present study proposed a new method to measure the solid–liquid interface temperature using the correlation among reflectance, refractive index, and temperature. It was found that the reflectance of a pNIPAM solution decreased after the droplet deposition. The solid–liquid interface temperature, estimated …
Open Source 3d-Printable Planetary Roller Screw For Food Processing Applications, Marcello C. Guadagno, Jacob M. Loss, Joshua M. Pearce
Open Source 3d-Printable Planetary Roller Screw For Food Processing Applications, Marcello C. Guadagno, Jacob M. Loss, Joshua M. Pearce
Michigan Tech Publications
Historically, open source agriculture (OSA) was based on grassroots technology generally manufactured by hand tools or with manual machining. The rise of distributed digital manufacturing provides an opportunity for much more rapid lateral scaling of open source appropriate technologies for agriculture. However, the most mature distributed manufacturing area is plastic, which has limited use for many OSA applications. To overcome this limitation with design, this study reports on of a completely 3D-printable planetary roller screw linear actuator. The device is designed as a parametric script-based computer aided design (CAD) package to allow for the easy adaption for a number of …
Mars Reconnaissance: Civil Engineering Advances For Human Exploration, Laurent Sibille, Robert W. Moses, Robert P. Mueller, Michelle A. Viotti, Michelle M. Munk, Paul J. Van Susante, Et. Al.
Mars Reconnaissance: Civil Engineering Advances For Human Exploration, Laurent Sibille, Robert W. Moses, Robert P. Mueller, Michelle A. Viotti, Michelle M. Munk, Paul J. Van Susante, Et. Al.
Michigan Tech Publications
No abstract provided.
Ignition Process And Flame Lift-Off Characteristics Of Dimethyl Ether (Dme) Reacting Spray, Khanh Duc Cung, Ahmed Abdul Moiz, Xiucheng Zhu, Seong-Young Lee
Ignition Process And Flame Lift-Off Characteristics Of Dimethyl Ether (Dme) Reacting Spray, Khanh Duc Cung, Ahmed Abdul Moiz, Xiucheng Zhu, Seong-Young Lee
Michigan Tech Publications
Advanced combustion systems that utilize different combustion modes and alternative fuels have significantly improved combustion performance and emissions compared to conventional diesel or spark-ignited combustions. As an alternative fuel, dimethyl ether (DME) has been receiving much attention as it runs effectively under low-temperature combustion (LTC) modes such as homogeneous charge compression ignition (HCCI) and reactivity control combustion ignition (RCCI). Under compression-ignition (CI), DME can be injected as liquid fuel into a hot chamber, resulting in a diesel-like spray/combustion characteristic. With its high fuel reactivity and unique chemical formula, DME ignites easily but produces almost smokeless combustion. In the current study, …
Me-Em Enewsbrief, March 2021, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Me-Em Enewsbrief, March 2021, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics eNewsBrief
No abstract provided.
Geophysical Observations Of Taliks Below Drained Lake Basins On The Arctic Coastal Plain Of Alaska, R. C. Rangel, A. D. Parsekian, L. M. Farquharson, B. M. Jones, N. Ohara, A. L. Creighton, B. V. Gaglioti, M. Kanevskiy, A. L. Breen, H. Bergstedt, V. E. Romanovsky, K. M. Hinkel
Geophysical Observations Of Taliks Below Drained Lake Basins On The Arctic Coastal Plain Of Alaska, R. C. Rangel, A. D. Parsekian, L. M. Farquharson, B. M. Jones, N. Ohara, A. L. Creighton, B. V. Gaglioti, M. Kanevskiy, A. L. Breen, H. Bergstedt, V. E. Romanovsky, K. M. Hinkel
Michigan Tech Publications
Lakes and drained lake basins (DLBs) together cover up to ∼80% of the western Arctic Coastal Plain of Alaska. The formation and drainage of lakes in this continuous permafrost region drive spatial and temporal landscape dynamics. Postdrainage processes including vegetation succession and permafrost aggradation have implications for hydrology, carbon cycling, and landscape evolution. Here, we used surface nuclear magnetic resonance (NMR) and transient electromagnetic (TEM) measurements in conjunction with thermal modeling to investigate permafrost aggradation beneath eight DLBs on the western Arctic Coastal Plain of Alaska. We also surveyed two primary surface sites that served as nonlake affected control sites. …
Moving Hands-On Mechanical Engineering Experiences Online: Course Redesigns And Student Perspectives, Jaclyn E. Johnson, Nancy B. Barr
Moving Hands-On Mechanical Engineering Experiences Online: Course Redesigns And Student Perspectives, Jaclyn E. Johnson, Nancy B. Barr
Michigan Tech Publications
Hands-on lab experiences are essential for enabling students to be successful engineers, especially those who identify as kinesthetic learners. This case study describes how a Mechanical Engineering Practice course sequence was redesigned during the COVID-19 emergency transition to remote learning and examines how students responded to these changes. The remote course included videos of Graduate Teaching Assistants conducting data acquisition phases of the practice session to replace hands-on experiments. To understand student perspectives and performance, researchers reviewed approximately 400 reflective essays from Spring 2020 and compared assignment submissions between Fall 2019 and Spring 2020. Results suggest that some students perceived …
Local And Systemic In Vivo Responses To Osseointegrative Titanium Nanotube Surfaces, Erin A. Baker, Mackenzie M. Fleischer, Alexander D. Vara, Meagan R. Salisbury, Kevin C. Baker, Paul T. Fortin, Craig R. Friedrich
Local And Systemic In Vivo Responses To Osseointegrative Titanium Nanotube Surfaces, Erin A. Baker, Mackenzie M. Fleischer, Alexander D. Vara, Meagan R. Salisbury, Kevin C. Baker, Paul T. Fortin, Craig R. Friedrich
Michigan Tech Publications
Orthopedic implants requiring osseointegration are often surface modified; however, implants may shed these coatings and generate wear debris leading to complications. Titanium nanotubes (TiNT), a new surface treatment, may promote osseointegration. In this study, in vitro (rat marrow-derived bone marrow cell attachment and morphology) and in vivo (rat model of intramedullary fixation) experiments characterized local and systemic responses of two TiNT surface morphologies, aligned and trabecular, via animal and remote organ weight, metal ion, hematologic, and nondecalcified histologic analyses. In vitro experiments showed total adherent cells on trabecular and aligned TiNT surfaces were greater than control at 30 min and …
Integration And Optimal Control Of Microcsp With Building Hvac Systems: Review And Future Directions, Mohamed Toub, Chethan Reddy, Rush D. Robinett Iii, Mahdi Shahbakhti
Integration And Optimal Control Of Microcsp With Building Hvac Systems: Review And Future Directions, Mohamed Toub, Chethan Reddy, Rush D. Robinett Iii, Mahdi Shahbakhti
Michigan Tech Publications
Heating, ventilation, and air-conditioning (HVAC) systems are omnipresent in modern buildings and are responsible for a considerable share of consumed energy and the electricity bill in buildings. On the other hand, solar energy is abundant and could be used to support the building HVAC system through cogeneration of electricity and heat. Micro-scale concentrated solar power (MicroCSP) is a propitious solution for such applications that can be integrated into the building HVAC system to optimally provide both electricity and heat, on-demand via application of optimal control techniques. The use of thermal energy storage (TES) in MicroCSP adds dispatching capabilities to the …
Experimental Analysis Of Ultrasonic Multiple Scattering Attenuation Through The Air With Fine Dust, Ukyong Woo, Hajin Choi, Homin Song
Experimental Analysis Of Ultrasonic Multiple Scattering Attenuation Through The Air With Fine Dust, Ukyong Woo, Hajin Choi, Homin Song
Michigan Tech Publications
In this study, we experimentally evaluated the application of multiple scattering theory for measuring ultrasonic attenuation. Based on the independent approximation theory, the method adopted for calculating the attenuation of coherent waves through air with fine dust is discussed. To obtain a scattering wavefield, a unique ultrasonic scattering hardware was developed, and signal processing schemes were suggested. Four cases of standard particle doses (0, 0.004, 0.008, and 0.012 g) were investigated inside a chamber. The results obtained from the experiments demonstrate that the proposed signal processing approach successfully calculates the scattering attenuation, which correlates well with the applied doses of …
Concrete Delamination Depth Estimation Using A Noncontact Mems Ultrasonic Sensor Array And An Optimization Approach, Homin Song, Jinyoung Hong, Hajin Choi, Jiyoung Min
Concrete Delamination Depth Estimation Using A Noncontact Mems Ultrasonic Sensor Array And An Optimization Approach, Homin Song, Jinyoung Hong, Hajin Choi, Jiyoung Min
Michigan Tech Publications
In this study, we present a method to estimate the depth of near-surface shallow delamination in concrete using a noncontact micro-electromechanical system (MEMS) ultrasonic sensor array and an optimization-based data processing approach. The proposed approach updates the bulk wave velocities of the tested concrete element by solving an optimization problem using reference ultrasonic scanning data collected from a full-depth concrete region. Subsequently, the depth of concrete delamination is estimated by solving a separate optimization problem. Numerical simulations and laboratory experiments were conducted to evaluate the performance of the proposed ultrasonic data processing approach. The results demonstrated that the depth of …
Numerical Analysis Of Ultrasonic Multiple Scattering For Fine Dust Number Density Estimation, Homin Song, Ukyong Woo, Hajin Choi
Numerical Analysis Of Ultrasonic Multiple Scattering For Fine Dust Number Density Estimation, Homin Song, Ukyong Woo, Hajin Choi
Michigan Tech Publications
In this study, a method is presented for estimating the number density of fine dust particles (the number of particles per unit area) through numerical simulations of multiply scattered ultrasonic wavefields. The theoretical background of the multiple scattering of ultrasonic waves under different regimes is introduced. A series of numerical simulations were performed to generate multiply scattered ultrasonic wavefield data. The generated datasets are subsequently processed using an ultrasound data processing approach to estimate the number density of fine dust particles in the air based on the independent scattering approximation theory. The data processing results demonstrate that the proposed approach …