Engineering Commons^™

Discrete Element Models Of Architectured Biological And Bio-Inspired Composites, J.William Pro, Najmul Abid, Ali Shafiei, Francois Barthelat

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Symmetry Of Phonon Modes For Periodic Structures With Glide Symmetry, Pu Zhang

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Mechanics Of Energy Absorbing Phase Transforming Cellular Materials, Yunlan Zhang, Kristiaan Hector, Mirian Velay-Lizancos, David Restrepo

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Three-Dimensional Multiscale Design Using Neural Net Surrogate Models Of Lattice Material Response, Bill Arrighi, Jun Kudo, Dan Tortorelli, Seth Watts

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Multiscale Method In Lattice Structures Stability Analysis With Topology Optimization, Le Cao

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Tunable Failure In Non-Periodic Architected Materials Inspired By Physarum Polycephalum Growth, Nan Hu, Hanqing Zhang, Daobo Zhang, Peng Feng

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Dynamic And Mechanical Properties Of Lattice-Resonator Meta-Structures, Kathryn Matlack, Ignacio Arretche

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Constitutive Modelling Of Cosserat Metamaterials, Haodong Du, Liang Zhang, Bo Peng, Wenbin Yu

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Architectured Helically Coiled Structures Through Novel Electro-Writing Technique, Miroslawa El-Fray, Rahul Sahay, Xiaomeng Sui, H.Daniel Wagner

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Routes To Program Thermal Expansion In Three-Dimensional Lattices Built From Tetrahedral Building Blocks, Hang Xu, Amr Farag, Damiano Pasini

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Architected Active Metamaterials, Kamran Khan

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Parametric And Combinatorial Topological Interlocking Assemblies, Oliver Tessmann, Andrea Rossi

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Mechanics Of Micro-Architectured Glass: Inverse Identification Of Interface Properties And A Novel Analytical Model, Susanta Ghosh, Mark Coldran, Praveen Bulusu, Upendra Yadav

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Random Foams: Instabilities, Fracture And Shocks, Stavros Gaitanaros

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Kirigami-Based Mechanical Metamaterials, Jie Yin

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Cysteine As An Eco-Friendly Corrosion Inhibitor, Hany A. Elazab Dr

Chemical Engineering

In this paper, the aim was finding the most efficient corrosion inhibitor for mild steel placed in a 0.5M Sulfuric acid. The comparison was implemented between Cysteine (an eco-friendly corrosion inhibitor) and 4 different Ions-Cysteine Inhibitors (Copper- Cysteine, Nickel-Cysteine, Iron-Cysteine, and Cobalt-Cysteine). The solutions were prepared and evaluated while placed with a working electrode of mild steel with a copper rod attached to its end. To determine the best eco-friendly corrosion inhibitors two experiments were implemented: Electrochemical Impedance Spectra, and Linear Polarization. By the end of the experiment it was found that Copper- Cysteine was the most efficient eco-friendly corrosion …

Operational Squadron Scheduling, Khaled A. Almannaei

Theses and Dissertations

The 28th Operational Weather Squadron (28th OWS) is responsible for producing and disseminating mission planning and execution weather analyses and forecasts. The squadron must prepare schedules that meet the needs of their mission while dealing with real-world constraints such as time windows, task priorities, and intermittent recurring missions. The 28th OWS's manning consists of active duty, deployed in-place, reserve, civilian and contract personnel. In this research, a scheduling model and algorithm are provided as an approach to crew scheduling for the 28th Operational Weather Squadron. Scheduling in the 28th OWS is complex and can be time consuming. This model will …

Rheological Performance Of Bio-Char Modified Asphalt With Different Particle Sizes, Ran Zhang, Qingli Dai, Zhanping You, Hainian Wang, Chao Peng

Michigan Tech Publications, Part 1

To improve the performance of petroleum asphalt, bio-char was used as a modifier for a petroleum asphalt binder, in this study. The rheological properties of bio-char modified asphalt binders were compared with different particle sizes and contents, with one control and one flake graphite modified asphalt binder. Specifically, the bio-char modifiers with two particle sizes (ranging from 75 μm–150 μm and less than 75 μm) and three contents of 2%, 4%, and 8% were added into the asphalt binder. A flake graphite powder with particle sizes less than 75 μm was used as a comparison modifier. The Scanning Electron Microscopy …

Properties And Mechanisms Of Self-Sensing Carbon Nanofibers/Epoxy Composites For Structural Health Monitoring, Yanlei Wang, Yongshuai Wang, Baolin Wan, Baoguo Han, Gaochuang Cai, Zhizheng Li

Civil and Environmental Engineering Faculty Research and Publications

In this paper, carbon nanofibers (CNFs) with high aspect ratio were dispersed into epoxy matrix via mechanical stirring and ultrasonic treatment to fabricate self-sensing CNFs/epoxy composites. The mechanical, electrical and piezoresistive properties of the nanocomposites filled with different contents of CNFs were investigated. Based on the tunneling conduction and percolation conduction theories, the mechanisms of piezoresistive property of the nanocomposites were also explored. The experimental results show that adding CNFs can effectively enhance the compressive strengths and elastic moduli of the composites. The percolation threshold of the CNFs/epoxy composites is 0.186 vol% according to the modified General Effective Media Equation. …

Modular Crates – A Holistic Design Approach For Optimizing Cube Size In Industrial Packaging, Marshal Louie, Kumar B

Journal of Applied Packaging Research

Global market is a field where all industries strive to provide personalized product for every customer demand in order to compete with their competitors in the business battlefield. Product personalization varies with customer to customer which increases the product variety. When the product size variability is vast, producing packages for every individual product is not only difficult but also increases the design time, production time, total manufacturing cost and inventory cost. For the present scenario, Industrial packages does not opt customizability for variable product sizes. Customized package for personalized product is achievable only by redesigning the existing distribution package with …

Bridging The Gap Between Real And Artificial Worlds: The Next Generation Classroom, Lori Brown

Academic Leadership Academy

Students today represent a new generation of learner which requires us to look beyond our tradition training methods. Augmented Reality (AR) has already shown great promise of transforming the way interact with students in any technically driven education such as aviation.

The operation and maintenance of modern aircraft requires an understanding of several interrelated human and machine components requiring practice and immersion. The immersive experience can be enhanced with augmented reality (AR) and virtual reality (VR). Relevant to the task at hand, they both have the ability to alter our perception of the world, give real-time feedback, improve the efficiency …

Efficiency Improvement Of Up-Conversion Process Of Plasmonic-Enhanced Er-Doped-Nayf4 Nanoparticles Under Ir Excitation, Sara Elrafei, Ishac Kandas, Nader Shehata, Effat Samir

Electrical and Computer Engineering Faculty Publications

The up-conversion process is extensively studied because of its wide variety of applications such as bioimaging, energy harvesting, and optical sensors. However, the optical conversion efficiency is still relatively low and needs to be improved. Therefore, this paper introduces a detailed study of improving the up-conversion emission efficiency through adding plasmonic metallic nanostructures to the up-conversion optical centers. Our idea is to couple the optical plasmonic resonance with the visible emission of the optical centers under IR excitation. The optical centers are erbium ions hosted by fluoride low-phonon environment. Our calculations consider most possible transitions that can occur between the …

Engaging Student Patrons With Traditional And Experimental Technology, Scott Russell, Joshua Enos, James Lane, Roy Zimmer

Academic Leadership Academy

No abstract provided.

A Neutral Wind Instrument For Nano-Satellite Platforms, L. J. Kordella, G. D. Earle, G. Roth, R. V. Robertson, Ryan L. Davidson, C. E. Holland, S. Noel, V. Garg

Electrical and Computer Engineering Faculty Publications

Here we describe the first neutral wind sensor developed specifically for use on resource limited nano-satellite platforms. The instrument is a next generation redesign of the ram wind sensor flown on the Communications/Navigation Outage Forecasting System satellite for measurements of neutral velocity, temperature, and composition. Results of subsystem tests in vacuum conditions show low-power operation, promising design, and good resolution of measured parameters over the operational pressure and energy ranges expected in the low Earth orbit environment.

A Nonlinear Systems Framework For Cyberattack Prevention For Chemical Process Control Systems, Helen Durand

Chemical Engineering and Materials Science Faculty Research Publications

Recent cyberattacks against industrial control systems highlight the criticality of preventing future attacks from disrupting plants economically or, more critically, from impacting plant safety. This work develops a nonlinear systems framework for understanding cyberattack-resilience of process and control designs and indicates through an analysis of three control designs how control laws can be inspected for this property. A chemical process example illustrates that control approaches intended for cyberattack prevention which seem intuitive are not cyberattack-resilient unless they meet the requirements of a nonlinear systems description of this property.

A Framework For Detecting Injected Influence Attacks On Microblog Websites Using Change Detection Techniques, Vishnu S. Pendyala, Yuhong Liu, Silvia M. Figueira

Computer Science and Engineering

Presidential elections can impact world peace, global economics, and overall well-being. Recent news indicates that fraud on the Web has played a substantial role in elections, particularly in developing countries in South America and the public discourse, in general. To protect the trustworthiness of the Web, in this paper, we present a novel framework using statistical techniques to help detect veiled Web fraud attacks in Online Social Networks (OSN). Specific examples are used to demonstrate how some statistical techniques, such as the Kalman Filter and the modified CUSUM, can be applied to detect various attack scenarios. A hybrid data set, …

Evaluation Of Tseb Turbulent Fluxes Using Different Methods For The Retrieval Of Soil And Canopy Component Temperatures From Uav Thermal And Multispectral Imagery, Héctor Nieto, William P. Kustas, Alfonso F. Torres-Rúa, Joseph G. Alfieri, Feng Gao, Martha C. Anderson, W. Alex White, Lisheng Song, María Del Mar Alsina, John H. Prueger, Mac Mckee, Manal Elarab, Lynn G. Mckee

AggieAir Publications

The thermal-based Two-Source Energy Balance (TSEB) model partitions the evapotranspiration (ET) and energy fluxes from vegetation and soil components providing the capability for estimating soil evaporation (E) and canopy transpiration (T). However, it is crucial for ET partitioning to retrieve reliable estimates of canopy and soil temperatures and net radiation, as the latter determines the available energy for water and heat exchange from soil and canopy sources. These two factors become especially relevant in row crops with wide spacing and strongly clumped vegetation such as vineyards and orchards. To better understand these effects, very high spatial resolution remote-sensing data from …

Electron Paramagnetic Resonance And Optical Absorption Study Of Acceptors In Cdsip2 Crystals, Elizabeth M. Scherrer, Larry E. Halliburton, Eric M. Golden, Kevin T. Zawilski, Peter G. Schunemann, F. Kenneth Hopkins, Kent L. Averett, Nancy C. Giles

Faculty Publications

Cadmium silicon diphosphide (CdSiP₂) is a nonlinear material often used in optical parametric oscillators (OPOs) to produce tunable laser output in the mid-infrared. Absorption bands associated with donors and acceptors may overlap the pump wavelength and adversely affect the performance of these OPOs. In the present investigation, electron paramagnetic resonance (EPR) is used to identify two unintentionally present acceptors in large CdSiP₂ crystals. These are an intrinsic silicon-on-phosphorus antisite and a copper impurity substituting for cadmium. When exposed to 633 µm laser light at temperatures near or below 80 K, they convert to their neutral paramagnetic charge …

Cultivating Third Party Development In Platform-Centric Software Ecosystems: Extended Boundary Resources Model, Brown C. Msiska

The African Journal of Information Systems

Software ecosystems provide an effective way through which software solutions can be constructed by composing software components, typically applications, developed by internal and external developers on top of a software platform. Third party development increases the potential of a software ecosystem to effectively and quickly respond to context-specific software requirements. The boundary resources model gives a theoretical account for cultivation of third party development premised on the role of platform boundary resources such as application programming interfaces (API). However, from a longitudinal case study of the DHIS2 software ecosystem, this paper observes that no matter how good the boundary resources …

Application Of Computational Mbd For Simulation Of Wrap Packaging Performance, Niels Hojen Ostergaard, Stephane Danjou

Journal of Applied Packaging Research

This paper concerns evaluation of the performance of plastic wrap films applied for packaging engineering by numerical simulation. In particular, the feasibility of computational techniques as supporting tool for packaging testing is investigated. A wrap film model constituted by a web of point masses connected by springs and dampers is applied to a number of stacked box-shaped objects. These will be modeled as perfectly rigid using simulation techniques from 3D multibody dynamics. Contact mechanics are simulated by penalization methods. A simple example demonstrates the potential of the developed framework.