David T. Fullwood
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View article: Wearable nanocomposite sensor system for diagnosing mechanical sources of low back pain and guiding rehabilitation
Wearable nanocomposite sensor system for diagnosing mechanical sources of low back pain and guiding rehabilitation Open
Vivli is an independent, non-profit organization that has developed a global data-sharing and analytics platform to serve all elements of the international research community. Our mission is to promote, coordinate, and facilitate scientifi…
View article: 3D Study of Microstructural Influences on Retained Austenite Transformation in Q&P 1180 Steel
3D Study of Microstructural Influences on Retained Austenite Transformation in Q&P 1180 Steel Open
Advanced TRIP steels offer an attractive combination of strength and ductility because of the transformation-induced plasticity (TRIP) phenomenon. The retained austenite (RA) embedded in quenched and partitioning (Q&P) 1180 steel provides …
View article: Modeling Piezoresistive Behavior of Conductive Composite Sensors via Multi-State Percolation Theory
Modeling Piezoresistive Behavior of Conductive Composite Sensors via Multi-State Percolation Theory Open
Flexible strain sensors, fabricated from high-elongation polymers and conductive filler particles, are proving an essential tool in the study of biomechanics using wearable technology. It has been previously shown that the resistive respon…
View article: Effect of Strain Path on Retained Austenite Transformation Rates and Material Ductility in Transformation-Induced Plasticity-Assisted Advanced High-Strength Steel
Effect of Strain Path on Retained Austenite Transformation Rates and Material Ductility in Transformation-Induced Plasticity-Assisted Advanced High-Strength Steel Open
TBF 1180 steel was plastically deformed under different strain paths in order to study both the ductility and RA transformation rates. Specimens were prepared from a 1 mm thick sheet and then tested incrementally under uniaxial tension, pl…
View article: Analyzing and Modeling the Dynamic Electrical Characteristics of Nanocomposite Large-Range Strain Gauges
Analyzing and Modeling the Dynamic Electrical Characteristics of Nanocomposite Large-Range Strain Gauges Open
Flexible high-deflection strain gauges have been demonstrated to be cost-effective and accessible sensors for capturing human biomechanical deformations. However, the interpretation of these sensors is notably more complex compared to conv…
View article: The Effect of Specimen Width on the Deformation Behavior and Formability of cp-Ti Grade 4 Sheets During Uniaxial and Cyclic Bending Under Tension Loading
The Effect of Specimen Width on the Deformation Behavior and Formability of cp-Ti Grade 4 Sheets During Uniaxial and Cyclic Bending Under Tension Loading Open
This study examines the specimen size-dependent deformation behavior of commercially pure titanium grade 4 (cp-Ti grade 4) sheets under tension, with strain paths between uniaxial tension (UT) and plane-strain tension and compares the resu…
View article: Effects of Geometry and Supporting Silicone Layers on the Performance of Conductive Composite High-Deflection Strain Gauges
Effects of Geometry and Supporting Silicone Layers on the Performance of Conductive Composite High-Deflection Strain Gauges Open
Piezoresistive sensors composed of nickel nanostrands, nickel-coated carbon fibers, and silicone can be used to measure large physical deflections but exhibit viscoelastic properties and creep, leading to a complex and nonlinear electrical…
View article: Multiscale characterization of dislocation development during cyclic bending under tension in commercially pure titanium
Multiscale characterization of dislocation development during cyclic bending under tension in commercially pure titanium Open
Cyclic bending under tension (CBT) has been shown to increase room temperature elongation-to-failure in various sheet metals beyond that of simple tension. A greater understanding of deformation mechanisms in CBT would allow for its elonga…
View article: Dynamic segmental kinematics of the lumbar spine during diagnostic movements
Dynamic segmental kinematics of the lumbar spine during diagnostic movements Open
Background: In vivo measurements of segmental-level kinematics are a promising avenue for better understanding the relationship between pain and its underlying, multi-factorial basis. To date, the bulk of the reported segmental-level motio…
View article: Dual-Sensing Piezoresponsive Foam for Dynamic and Static Loading
Dual-Sensing Piezoresponsive Foam for Dynamic and Static Loading Open
Polymeric foams, embedded with nano-scale conductive particles, have previously been shown to display quasi-piezoelectric (QPE) properties; i.e., they produce a voltage in response to rapid deformation. This behavior has been utilized to s…
View article: Wearable Nanocomposite Sensor System for Motion Phenotyping Chronic Low Back Pain: A BACPAC Technology Research Site
Wearable Nanocomposite Sensor System for Motion Phenotyping Chronic Low Back Pain: A BACPAC Technology Research Site Open
Chronic low back pain (cLBP) is a prevalent and multifactorial ailment. No single treatment has been shown to dramatically improve outcomes for all cLBP patients, and current techniques of linking a patient with their most effective treatm…
View article: Accounting for Viscoelasticity When Interpreting Nano-Composite High-Deflection Strain Gauges
Accounting for Viscoelasticity When Interpreting Nano-Composite High-Deflection Strain Gauges Open
High-deflection strain gauges show potential as economical and user-friendly sensors for capturing large deformations. The interpretation of these sensors is much more complex than that of conventional strain gauges due to the viscoelastic…
View article: Fundamental Mechanisms Controlling Dislocation-Obstacle Interactions in Metals and Alloys
Fundamental Mechanisms Controlling Dislocation-Obstacle Interactions in Metals and Alloys Open
This project combined modeling and experimentation across micro-meso-macro length scales to investigate the role of long-range internal stresses associated with obstacles and dislocation populations, in the deformation response of cubic me…
View article: Accurate Prediction of Knee Angles during Open-Chain Rehabilitation Exercises Using a Wearable Array of Nanocomposite Stretch Sensors
Accurate Prediction of Knee Angles during Open-Chain Rehabilitation Exercises Using a Wearable Array of Nanocomposite Stretch Sensors Open
In this work, a knee sleeve is presented for application in physical therapy applications relating to knee rehabilitation. The device is instrumented with sixteen piezoresistive sensors to measure knee angles during exercise, and can suppo…
View article: Towards a Quantitative Cartography of the Grain Boundary Energy Landscape: Paths and Correlations
Towards a Quantitative Cartography of the Grain Boundary Energy Landscape: Paths and Correlations Open
We apply a newly developed Voronoi fundamental zone (VFZ) framework to gain insights about grain boundary (GB) structure-property relationships in the five degree-of-freedom (5DOF) space of cubic GBs. We analyze the shape and size of a 5DO…
View article: New Mechanism for Yield Point Phenomena
New Mechanism for Yield Point Phenomena Open
Yield point phenomena (YPP) are widely attributed to discrete dislocation locking by solute atmospheres. An alternate YPP mechanism was recently suggested by simulations of Ta single crystals without any influence of solutes or discrete di…
View article: Fundamental Mechanisms Controlling Dislocation-Obstacle Interactions in Metals and Alloys
Fundamental Mechanisms Controlling Dislocation-Obstacle Interactions in Metals and Alloys Open
This project combined modeling and experimentation across micro-meso-macro length scales to investigate the role of long-range internal stresses associated with obstacles and dislocation populations, in the deformation response of cubic me…
View article: Race Differences in Resilience Among Older Adults with Chronic Low Back Pain
Race Differences in Resilience Among Older Adults with Chronic Low Back Pain Open
Calia A Morais,1 Dottington Fullwood,2 Shreela Palit,1 Roger B Fillingim,1 Michael E Robinson,3 Emily J Bartley1 1Department of Community Dentistry and Behavioral Sciences, University of Florida, Gainesville, FL, USA; 2Institute on Aging, …
View article: Characterization of mechanical deformation in aluminum by optical second harmonic generation
Characterization of mechanical deformation in aluminum by optical second harmonic generation Open
Second harmonic generation (SHG), a laser-based surface technique, was used to characterize near-surface defect evolution associated with mechanical deformation in 2024-T3 aluminum due to tensile loads. Electron backscatter diffraction (EB…
View article: gitID-0055bee_uuID-475a2dfd_paper-data6.mat
gitID-0055bee_uuID-475a2dfd_paper-data6.mat Open
This is a larger MATLAB .mat file required for reproducing plots from the sgbaird-5DOF/interp repository for grain boundary property interpolation. It contains multiple trials of five degree-of-freedom interpolation model runs for various …
View article: Five Degree-of-Freedom Grain Boundary Interpolation
Five Degree-of-Freedom Grain Boundary Interpolation Open
These are larger MATLAB .mat files required for reproducing plots from the sgbaird-5DOF/interp repository for grain boundary property interpolation. gitID-0055bee_uuID-475a2dfd_paper-data6.mat contains multiple trials of five degree-of-fre…
View article: gitID-0055bee_uuID-475a2dfd_paper-data6.mat
gitID-0055bee_uuID-475a2dfd_paper-data6.mat Open
This is a larger MATLAB .mat file required for reproducing plots from the sgbaird-5DOF/interp repository for grain boundary property interpolation. It contains multiple trials of five degree-of-freedom interpolation model runs for various …
View article: Grain Boundary Correlation Lengths
Grain Boundary Correlation Lengths Open
.mat files which contain information about trained Gaussian Process Regression models for Ni and Fe grain boundary energies and crystallographic distances/covariance.