Open Access. Powered by Scholars. Published by Universities.®

Applied Mechanics Commons

Open Access. Powered by Scholars. Published by Universities.®

3019 Full-Text Articles 1248 Authors 477354 Downloads 50 Institutions

All Articles in Applied Mechanics

Faceted Search

3019 full-text articles. Page 1 of 23.

Innovation Of Driving Gear Train System For Developer Unit Of Lexmark Home Printers, Jay A. Crist, Sarah Gore, Kun Xie, Michael Mixoon 2017 University of Tennessee, Knoxville

Innovation Of Driving Gear Train System For Developer Unit Of Lexmark Home Printers, Jay A. Crist, Sarah Gore, Kun Xie, Michael Mixoon

University of Tennessee Honors Thesis Projects

No abstract provided.


Machine Learning For High-Throughput Stress Phenotyping In Plants, Arti Singh, Baskar Ganapathysubramanian, Asheesh Kumar Singh, Soumik Sarkar 2017 Iowa State University

Machine Learning For High-Throughput Stress Phenotyping In Plants, Arti Singh, Baskar Ganapathysubramanian, Asheesh Kumar Singh, Soumik Sarkar

Baskar Ganapathysubramanian

Advances in automated and high-throughput imaging technologies have resulted in a deluge of high-resolution images and sensor data of plants. However, extracting patterns and features from this large corpus of data requires the use of machine learning (ML) tools to enable data assimilation and feature identification for stress phenotyping. Four stages of the decision cycle in plant stress phenotyping and plant breeding activities where different ML approaches can be deployed are (i) identification, (ii) classification, (iii) quantification, and (iv) prediction (ICQP). We provide here a comprehensive overview and user-friendly taxonomy of ML tools to enable the plant community to correctly ...


Models For Ut Inspection Of Bolthole Cracks In Layered Structures, Robert Grandin, Tim Gray, Ron Roberts 2017 Iowa State University

Models For Ut Inspection Of Bolthole Cracks In Layered Structures, Robert Grandin, Tim Gray, Ron Roberts

Robert Grandin

Due to the geometrical complexities of bolted, layered airframe structures, the application of Model Assisted Probability of Detection, or MAPOD, is an important tool for helping to assess the ultrasonic inspectability of those components. Of particular importance is the need to inspect for cracks on or near boltholes in those structures. This presentation describes the development and testing of analytical computer models of and their application to bolthole crack inspection. The modeling approach includes approximate, paraxial, bulk-wave models as well as more rigorous, analytical models that include both bulk and surface/plate modes. The simpler models have the flexibility and ...


The Wear Scale: Developing A Measure Of The Social Acceptability Of A Wearable Device, Norene Kelly, Stephen B. Gilbert 2017 Iowa State University

The Wear Scale: Developing A Measure Of The Social Acceptability Of A Wearable Device, Norene Kelly, Stephen B. Gilbert

Stephen B. Gilbert

The factors affecting the social acceptability of wearable devices are not well understood, yet they have a strong influence on whether a new wearable succeeds or fails. Factors uniquely affecting wearable acceptability as compared to other technology include manners, moral codes, the symbolic communication of dress, habits of dress, fashion, context of use, form, and aesthetics. This paper describes the development of the WEarable Acceptability Range (WEAR Scale), designed to predict acceptance of a particular wearable. First, the construct "social acceptability of a wearable" was defined using literature and an interview study. Second, the WEAR Scale's item pool was ...


The Impact Of Three Interfaces For 360-Degree Video On Spatial Cognition, Wutthigrai Boonsuk, Stephen B. Gilbert, Jonathan W. Kelly 2017 Iowa State University

The Impact Of Three Interfaces For 360-Degree Video On Spatial Cognition, Wutthigrai Boonsuk, Stephen B. Gilbert, Jonathan W. Kelly

Stephen B. Gilbert

In this paper, we describe an experiment designed to evaluate the effectiveness of three interfaces for surveillance or remote control using live 360-degree video feeds from a person or vehicle in the field. Video feeds are simulated using a game engine. While locating targets within a 3D terrain using a 2D 360-degree interface, participants indicated perceived egocentric directions to targets and later placed targets on an overhead view of the terrain. Interfaces were compared based on target finding and map placement performance. Results suggest 1) non-seamless interfaces with visual boundaries facilitate spatial understanding, 2) correct perception of self-to-object relationships is ...


Authoring Effective Embedded Tutors: An Overview Of The Extensible Problem Specific Tutor (Xpst) System, Stephen B. Gilbert, Stephen B. Blessing, Enruo Guo 2017 Iowa State University

Authoring Effective Embedded Tutors: An Overview Of The Extensible Problem Specific Tutor (Xpst) System, Stephen B. Gilbert, Stephen B. Blessing, Enruo Guo

Stephen B. Gilbert

The Extensible Problem Specific Tutor (xPST) allows authors who are not cognitive scientists and not programmers to quickly create an intelligent tutoring system that provides instruction akin to a model-tracing tutor. Furthermore, this instruction is overlaid on existing software, so that the learner’s interface does not have to be made from scratch. The xPST architecture allows for extending its capabilities by the addition of plug-ins that communicate with additional third-party software. After reviewing this general architecture, we describe three major implementations that we have created using the xPST system, each using different third-party software as the learner’s interface ...


Using Conceptgrid As An Easy Authoring Technique To Check Natural Language Responses, Stephen B. Blessing, Shrenik Devasani, Stephen B. Gilbert, Jivko Sinapov 2017 University of Tampa

Using Conceptgrid As An Easy Authoring Technique To Check Natural Language Responses, Stephen B. Blessing, Shrenik Devasani, Stephen B. Gilbert, Jivko Sinapov

Stephen B. Gilbert

ConceptGrid provides a template-style approach to check natural language responses by students using a model-tracing style intelligent tutoring system. The tutor-author creates, using a web-based authoring system, a latticestyle structure that contains the set of required concepts that need to be in a student response. The author can also create just-in-time feedback based on the concepts present or absent in the student's response. ConceptGrid is integrated within the xPST authoring tool and was tested in two experiments, both of which show the efficacy of the technique to check student answers. The first study tested the tutor's effectiveness overall ...


Hierarchical Feature Extraction For Efficient Design Of Microfluidic Flow Patterns, Kin Gwn Lore, Daniel Stoecklein, Michael Davies, Baskar Ganapathysubramanian, Soumik Sarkar 2017 Iowa State University

Hierarchical Feature Extraction For Efficient Design Of Microfluidic Flow Patterns, Kin Gwn Lore, Daniel Stoecklein, Michael Davies, Baskar Ganapathysubramanian, Soumik Sarkar

Baskar Ganapathysubramanian

Deep neural networks are being widely used for feature representation learning in diverse problem areas ranging from object recognition and speech recognition to robotic perception and human disease prediction. We demonstrate a novel, perhaps the first application of deep learning in mechanical design, specifically to learn complex microfluidic flow patterns in order to solve inverse problems in fluid mechanics. A recent discovery showed the ability to control the fluid deformations in a microfluidic channel by placing a sequence of pillars. This provides a fundamental tool for numerous material science, manufacturing and biological applications. However, designing pillar sequences for user-defined deformations ...


Cal Poly Caramel Counter Top Candy Wrapping Machine, Alexander Miller, Roman Stambaugh, Trevor Steele 2017 California Polytechnic State University, San Luis Obispo

Cal Poly Caramel Counter Top Candy Wrapping Machine, Alexander Miller, Roman Stambaugh, Trevor Steele

Mechanical Engineering

The purpose of this project was to automate the caramel wrapping process for a small batch confectionist. Using a purely mechanical system that is hand-powered, the machine cuts and wraps caramel candies in a double twist fashion.


Ut Lineman Chute, Benjamin D. Jacob, Logan T. Sissom, Stephen E. Brennan, Thomas B. McDavid 2017 University of Tennessee, Knoxville

Ut Lineman Chute, Benjamin D. Jacob, Logan T. Sissom, Stephen E. Brennan, Thomas B. Mcdavid

University of Tennessee Honors Thesis Projects

No abstract provided.


Peridynamic Models For Fatigue And Fracture In Isotropic And In Polycrystalline Materials, Guanfeng Zhang 2017 University of Nebraska - Lincoln

Peridynamic Models For Fatigue And Fracture In Isotropic And In Polycrystalline Materials, Guanfeng Zhang

Mechanical (and Materials) Engineering -- Dissertations, Theses, and Student Research

To improve design and reliability, extensive efforts has been devoted to understanding damage and failure of materials and structures using numerical simulation, as a complement of theory and experiment. In this thesis, peridynamics is adopted to study fatigue and dynamic failure problems.

Fatigue is a major failure mode in engineering structures. Predicting fracture/failure under cyclic loading is a challenging problem. Classical model cannot directly be applied to problems with discontinuities. A peridynamic model is adopted in this work because of important advantages of peridynamics in allowing autonomous crack initiation and propagation. A recently proposed peridynamic fatigue crack model is ...


Oxidation Of Ti2Alc In High Temperature Steam Environment, Ziyad M. Smoqi 2017 University of Nebraska-Lincoln

Oxidation Of Ti2Alc In High Temperature Steam Environment, Ziyad M. Smoqi

Mechanical (and Materials) Engineering -- Dissertations, Theses, and Student Research

High temperature oxidation of fuel cladding materials, during the loss of coolant accident (LOCA), is of utmost importance for next-generation nuclear energy systems. Ti2AlC is a promising candidate material for nuclear applications due to its outstanding properties such as thermal stability at high temperatures, oxidation resistance in air, thermal shock resistance, low neutron absorption cross-section, and the resistance to irradiation-induced amorphization. In this research, high temperature steam oxidation experiments were conducted to evaluate the oxidation resistance of Ti2AlC in LOCA conditions. After oxidation in 100% steam at 600 and 800˚C, the oxidation kinetics followed a ...


A Farm-Level Precision Land Management Framework Based On Integer Programming, Qi Li, Guiping Hu, Talukder Jubery, Baskar Ganapathysubramanian 2017 Iowa State University

A Farm-Level Precision Land Management Framework Based On Integer Programming, Qi Li, Guiping Hu, Talukder Jubery, Baskar Ganapathysubramanian

Mechanical Engineering Publications

Farmland management involves several planning and decision making tasks including seed selection and irrigation management. A farm-level precision farmland management model based on mixed integer linear programming is proposed in this study. Optimal decisions are designed for pre-season planning of crops and irrigation water allocation. The model captures the effect of size and shape of decision scale as well as special irrigation patterns. The authors illustrate the model with a case study on a farm in the state of California in the U.S. and show the model can capture the impact of precision farm management on profitability. The results ...


Modeling And Computation Of The Maximum Braking Energy Speed For Transport Category Airplanes, Nihad E. Daidzic 2017 AAR Aerospace Consulting, LLC

Modeling And Computation Of The Maximum Braking Energy Speed For Transport Category Airplanes, Nihad E. Daidzic

Journal of Aviation Technology and Engineering

Transport-category or FAR/CS 25 certified airplanes may occasionally become braking energy capacity limited. Such limitation may exist when heavy airplanes are departing airports at high-density altitudes, on relatively long runways, and/or possibly with some tailwind component. A maximum braking energy VMBE speed exists which may limit the maximum allowable takeoff decision/action speed V1. The ever-existing possibility of high-speed rejected takeoff in such conditions may also limit the airplane gross weight for declared available distances. To gain deeper insights and acquire better understanding of the topic, a theoretical model of the maximum braking energy and the related VMBE ...


Negahban Group Report: Saw-Tooth Shear Response Of Aged Poly(Methyl Methacrylate) (Pmma), Mehrdad Negahban 2017 University of Nebraska - Lincoln

Negahban Group Report: Saw-Tooth Shear Response Of Aged Poly(Methyl Methacrylate) (Pmma), Mehrdad Negahban

Mechanical & Materials Engineering Faculty Publications

Results for isothermal saw-tooth shear loading experiments conducted on annealed and oven-cooled poly(methyl methacrylate) (PMMA) at temperatures between 50oC and 140oC. The experiments were conducted 1996.


Higher Order Acoustoelastic Lamb Wave Propagation In Stressed Plates, Ning Pei, Leonard J. Bond 2017 Iowa State University

Higher Order Acoustoelastic Lamb Wave Propagation In Stressed Plates, Ning Pei, Leonard J. Bond

Leonard J. Bond

Residual stresses can be generated during fabrication processes, such as, welding, forging, rolling etc[1-3] . They have obvious influence on the performance of the material, like cracking and corrosion. To better control residual stresses, the initial distribution of them in materials must be clear. Ultrasonic methods can be used as a good tool for residual stress detection, and this approach is non-destructive and costs are modest. Methods which utilize longitudinal critically refracted (LCR) waves are receiving increased attention and it can be used on thick material. However, there have only been a limited number of studies which consider the acoustoelastic ...


A Closed-Form Solution For The Similarity Transformation Parameters Of Two Planar Point Sets, Shamsul A. Shamsudin, Andrew P. Murray 2017 Universiti Teknikal

A Closed-Form Solution For The Similarity Transformation Parameters Of Two Planar Point Sets, Shamsul A. Shamsudin, Andrew P. Murray

Andrew P. Murray

Image registration covers the set of techniques used in matching images of the same scene. A subset of the image registration problem, identifying the parameters in a similarity transformation, has emerged as useful in a recently defined area of machine design: designing mechanisms for rigidbody shape-change. First, this brief paper shows a potential use for image registration techniques outside the field of machine vision. Second, it presents a closed-form solution for the similarity transformation parameters when the point sets to be matched are restricted to two-dimensional space as is needed in the aforementioned design problem.


A Finite Element Approach To Self-Consistent Field Theory Calculations Of Multiblock Polymers, David M. Ackerman, Kris Delaney, Glenn H. Fredrickson, Baskar Ganapathysubramanian 2017 Iowa State University

A Finite Element Approach To Self-Consistent Field Theory Calculations Of Multiblock Polymers, David M. Ackerman, Kris Delaney, Glenn H. Fredrickson, Baskar Ganapathysubramanian

Mechanical Engineering Publications

Self-consistent field theory (SCFT) has proven to be a powerful tool for modeling equilibrium microstructures of soft materials, particularly for multiblock polymers. A very successful approach to numerically solving the SCFT set of equations is based on using a spectral approach. While widely successful, this approach has limitations especially in the context of current technologically relevant applications. These limitations include non-trivial approaches for modeling complex geometries, difficulties in extending to non-periodic domains, as well as non-trivial extensions for spatial adaptivity. As a viable alternative to spectral schemes, we develop a finite element formulation of the SCFT paradigm for calculating equilibrium ...


Space Perception In Virtual Environments: Displacement From The Center Of Projection Causes Less Distortion Than Predicted By Cue-Based Models, Jonathan W. Kelly, Melissa Burton, Brice Pollock, Eduardo Rubio, Michael Curtis, Julio de la Cruz, Stephen B. Gilbert, Eliot H. Winer 2017 Iowa State University

Space Perception In Virtual Environments: Displacement From The Center Of Projection Causes Less Distortion Than Predicted By Cue-Based Models, Jonathan W. Kelly, Melissa Burton, Brice Pollock, Eduardo Rubio, Michael Curtis, Julio De La Cruz, Stephen B. Gilbert, Eliot H. Winer

Stephen B. Gilbert

Virtual reality systems commonly include both monocular and binocular depth cues, which have the potential to provide viewers with a realistic impression of spatial properties of the virtual environment. However, when multiple viewers share the same display, only one viewer typically receives the projectively correct images. All other viewers experience the same images despite displacement from the center of projection (CoP). Three experiments evaluated perceptual distortions caused by displacement from the CoP and compared those percepts to predictions of models based on monocular and binocular viewing geometry. Leftward and rightward displacement from the CoP caused virtual angles on the ground ...


Convection In Corrugated Slots, Seyed Arman Abtahi 2017 The University of Western Ontario

Convection In Corrugated Slots, Seyed Arman Abtahi

Electronic Thesis and Dissertation Repository

This thesis consists of two parts. The first part deals with the development of proper methodology, i.e. a spectrally accurate algorithm suitable for analysis of convection problems in corrugated slots. The second part is devoted to the study of natural convection in corrugated slots.

The algorithm uses the immersed boundary conditions (IBC) concept to deal with the irregular form of the solution domain associated with the presence of corrugated plates. The field equations are discretized on a regular domain surrounding the flow domain using Fourier expansions in the horizontal direction and Chebyshev expansions in the vertical direction. The boundary ...


Digital Commons powered by bepress