1-20 of 32
Darren Hartl
Close
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Designing a Morphable Parabolic Reflector Antenna Using Origami-Inspired Discretization and Efficient Global Optimization

Gregory Wilson, Dimitris Lagoudas, Darren Hartl
Proc. ASME. SMASIS2020, ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, V001T03A017, September 15, 2020
Paper No: SMASIS2020-2431
DOI: https://doi.org/10.1115/SMASIS2020-2431
View Paper
PDF
Topics: Design, Modeling, Optimization, Origami-inspired design, Optimization algorithms, Actuators, Radiation (Physics), Shape memory alloys, Shapes, Signals
Proceedings Papers

Development and Experimental Demonstration of a Shape Memory Alloy-Based Adaptive Two-Phase Radiator for Space Applications

Jared Lilly, Bethany Hansen, Ryan Lotz, Darren Hartl, Thomas Cognata, Priscilla Nizio, Connor Joyce
Proc. ASME. SMASIS2020, ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, V001T04A022, September 15, 2020
Paper No: SMASIS2020-2361
DOI: https://doi.org/10.1115/SMASIS2020-2361
View Paper
PDF
Topics: Alloys, Control systems, Design, Engineering prototypes, Flow (Dynamics), Fluid dynamics, Fluids, Heat, Heat exchangers, Heat pipes
Proceedings Papers

Morphing Airfoil Design via L-System Generated Topology Optimization

Madalyn Mikkelsen, Michayal Mathew, Patrick Walgren, Brent Bielefeldt, Pedro B. C. Leal, Darren Hartl, Andres Arrieta
Proc. ASME. SMASIS2019, ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, V001T04A022, September 9–11, 2019
Paper No: SMASIS2019-5695
DOI: https://doi.org/10.1115/SMASIS2019-5695
View Paper
PDF
Topics: Airfoils, Design, Optimization, Topology, Actuators, Fluid structure interaction, Shape memory alloys, Stress, Structural elements (Construction), Tradeoffs
Proceedings Papers

Towards High Turndown Ratio Shape Memory Alloy-Driven Morphing Radiators

Patrick Walgren, Othmane Benafan, Lisa Erickson, Darren Hartl
Proc. ASME. SMASIS2018, Volume 2: Mechanics and Behavior of Active Materials; Structural Health Monitoring; Bioinspired Smart Materials and Systems; Energy Harvesting; Emerging Technologies, V002T02A009, September 10–12, 2018
Paper No: SMASIS2018-8091
DOI: https://doi.org/10.1115/SMASIS2018-8091
View Paper
PDF
Topics: Alloys, Shapes, Heat, Temperature, Control systems, Engineering prototypes, Active materials, Actuators, Computer simulation, Design
Proceedings Papers

Aerodynamic and Structural Evaluation of an SMA Slat-Cove Filler Using Computational and Experimental Tools at Model Scale

William Scholten, Ryan Patterson, Makiah Eustice, Sebastian Cook, Darren Hartl, Thomas Strganac, Travis Turner
Proc. ASME. SMASIS2018, Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation, and Control of Adaptive Systems; Integrated System Design and Implementation, V001T04A019, September 10–12, 2018
Paper No: SMASIS2018-8129
DOI: https://doi.org/10.1115/SMASIS2018-8129
View Paper
PDF
Topics: Fillers (Materials), Computational fluid dynamics, Noise (Sound), Displacement, Fluid structure interaction, Wind tunnels, Additive manufacturing, Aircraft, Constitutive equations, Deformation
Proceedings Papers

A Tailored Nonlinear Slat-Cove Filler for Airframe Noise Reduction

Gaetano Arena, Rainer Groh, Alberto Pirrera, William Scholten, Darren Hartl, Travis Turner
Proc. ASME. SMASIS2018, Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation, and Control of Adaptive Systems; Integrated System Design and Implementation, V001T03A017, September 10–12, 2018
Paper No: SMASIS2018-8079
DOI: https://doi.org/10.1115/SMASIS2018-8079
View Paper
PDF
Topics: Fillers (Materials), Noise control, Composite materials, Noise (Sound), Deformation, Acoustics, Air flow, Design, Displacement, Fatigue
Proceedings Papers

Design Optimization of Folding Solar Powered Autonomous Underwater Vehicles Using Origami Architecture

Doe Young Hur, Edwin Peraza Hernandez, Edgar Galvan, Darren Hartl, Richard Malak
Proc. ASME. IDETC-CIE2017, Volume 5B: 41st Mechanisms and Robotics Conference, V05BT08A048, August 6–9, 2017
Paper No: DETC2017-67848
DOI: https://doi.org/10.1115/DETC2017-67848
View Paper
PDF
Topics: Design, Optimization, Solar power, Underwater vehicles, Shapes, Computational fluid dynamics, Dimensions, Solar energy, Active materials, Actuators
Proceedings Papers

An Origami-Inspired, SMA Actuated Lifting Structure

Leo J. Wood, Jaime Rendon, Richard J. Malak, Darren Hartl
Proc. ASME. IDETC-CIE2016, Volume 5B: 40th Mechanisms and Robotics Conference, V05BT07A024, August 21–24, 2016
Paper No: DETC2016-60261
DOI: https://doi.org/10.1115/DETC2016-60261
View Paper
PDF
Topics: Origami-inspired design, Stress, Construction, Wire, Actuators, Design, Engineering systems and industry applications, Shape memory alloys, Testing, Torsion
Proceedings Papers

Noise Reduction in a High Lift Wing Using SMAs: Computational Fluid-Structural Analysis

William Scholten, Ryan Patterson, Darren Hartl, Thomas Strganac, Jeff Volpi, Quentin Chapelon, Travis Turner
Proc. ASME. SMASIS2016, Volume 1: Multifunctional Materials; Mechanics and Behavior of Active Materials; Integrated System Design and Implementation; Structural Health Monitoring, V001T02A009, September 28–30, 2016
Paper No: SMASIS2016-9196
DOI: https://doi.org/10.1115/SMASIS2016-9196
View Paper
PDF
Topics: Fluids, Noise control, Wings, Computational fluid dynamics, Flow (Dynamics), Fluid structure interaction, Noise (Sound), Aircraft, Deformation, Fillers (Materials)
Proceedings Papers

Reinforcement Learning for Control of a Shape Memory Alloy Based Self-Folding Sheet

Peyman Moghadas, Richard Malak, Darren Hartl
Proc. ASME. IDETC-CIE2015, Volume 5B: 39th Mechanisms and Robotics Conference, V05BT08A044, August 2–5, 2015
Paper No: DETC2015-46980
DOI: https://doi.org/10.1115/DETC2015-46980
View Paper
PDF
Topics: Shape memory alloys, Laminates, Feedback, Algorithms, Control equipment, Elastomers, Engineers, Finite element analysis, Heating, Modeling
Proceedings Papers

Computationally Efficient Analysis of SMA Sensory Particles Embedded in Complex Aerostructures Using a Substructure Approach

Brent Bielefeldt, Jacob Hochhalter, Darren Hartl
Proc. ASME. SMASIS2015, Volume 1: Development and Characterization of Multifunctional Materials; Mechanics and Behavior of Active Materials; Modeling, Simulation and Control of Adaptive Systems, V001T02A007, September 21–23, 2015
Paper No: SMASIS2015-8975
DOI: https://doi.org/10.1115/SMASIS2015-8975
View Paper
PDF
Topics: Particulate matter, Aircraft, Fatigue cracks, Flight, Wings, Computation, Crack detection, Damage, Degrees of freedom, Finite element model
Proceedings Papers

Reduction of Actuation Loads in a Self-Deploying SMA-Based Slat-Cove Filler for a Transport Aircraft

William Scholten, Darren Hartl, Thomas Strganac, Travis Turner
Proc. ASME. SMASIS2015, Volume 2: Integrated System Design and Implementation; Structural Health Monitoring; Bioinspired Smart Materials and Systems; Energy Harvesting, V002T04A016, September 21–23, 2015
Paper No: SMASIS2015-9015
DOI: https://doi.org/10.1115/SMASIS2015-9015
View Paper
PDF
Topics: Aircraft, Fillers (Materials), Stress, Noise (Sound), Design, Finite element analysis, Actuators, Flow (Dynamics), Genetic algorithms, Modeling
Proceedings Papers

Control of a Shape Memory Alloy Based Self-Folding Sheet

Tyler Halbert, Peyman Moghadas, Richard Malak, Darren Hartl
Proc. ASME. IDETC-CIE2014, Volume 5B: 38th Mechanisms and Robotics Conference, V05BT08A041, August 17–20, 2014
Paper No: DETC2014-34703
DOI: https://doi.org/10.1115/DETC2014-34703
View Paper
PDF
Topics: Shape memory alloys, Feedback, Control equipment, Laminates, Simulation, Wire, Finite element model, Modeling, Tradeoffs
Proceedings Papers

Design and Analysis of a Self-Folding SMA-SMP Composite Laminate

Robert Saunders, Darren Hartl, Richard Malak, Dimitris Lagoudas
Proc. ASME. IDETC-CIE2014, Volume 5B: 38th Mechanisms and Robotics Conference, V05BT08A048, August 17–20, 2014
Paper No: DETC2014-35151
DOI: https://doi.org/10.1115/DETC2014-35151
View Paper
PDF
Topics: Composite materials, Design, Laminates, Shapes, Wire, Deflection, Deformation, Glass transition, Materials properties, Particle filtering (numerical methods)
Proceedings Papers

Optimization of a Composite Morphing Wing With Shape Memory Alloy Torsional Actuators

Robert Saunders, Darren Hartl, Joshua Herrington, Logan Hodge, James Mabe
Proc. ASME. SMASIS2014, Volume 2: Mechanics and Behavior of Active Materials; Integrated System Design and Implementation; Bioinspired Smart Materials and Systems; Energy Harvesting, V002T02A014, September 8–10, 2014
Paper No: SMASIS2014-7644
DOI: https://doi.org/10.1115/SMASIS2014-7644
View Paper
PDF
Topics: Actuators, Composite materials, Optimization, Shape memory alloys, Wings, Design, Torque, Stress, Aircraft, Buckling
Proceedings Papers

Feedback Control Applied to Finite Element Models of Morphing Structures

Christopher Bertagne, Peyman Moghadas, Richard Malak, Darren Hartl
Proc. ASME. SMASIS2014, Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Structural Health Monitoring; Keynote Presentation, V001T03A026, September 8–10, 2014
Paper No: SMASIS2014-7601
DOI: https://doi.org/10.1115/SMASIS2014-7601
View Paper
PDF
Topics: Feedback, Finite element model, Control equipment, Finite element analysis, Architecture, Computer simulation, Engineering simulation, Simulation, Stress, Tradeoffs
Proceedings Papers

Effect of Processing and Loading on Equiatomic NiTi Fatigue Life and Localized Failure Mechanisms

Robert Wheeler, Judy Santa-Cruz, Darren Hartl, Dimitris Lagoudas
Proc. ASME. SMASIS2013, Volume 2: Mechanics and Behavior of Active Materials; Structural Health Monitoring; Bioinspired Smart Materials and Systems; Energy Harvesting, V002T02A010, September 16–18, 2013
Paper No: SMASIS2013-3163
DOI: https://doi.org/10.1115/SMASIS2013-3163
View Paper
PDF
Topics: Failure mechanisms, Fatigue life, Nickel titanium alloys, Fatigue, Heat, Stress, Aerospace industry, Actuators, Computer software, Cooling
Proceedings Papers

Comparison of Three-Dimensional Shape Memory Alloy Constitutive Models: Finite Element Analysis of Actuation and Superelastic Responses of a Shape Memory Alloy Tube

Pingping Zhu, L. Catherine Brinson, Edwin Peraza-Hernandez, Darren Hartl, Aaron Stebner
Proc. ASME. SMASIS2013, Volume 2: Mechanics and Behavior of Active Materials; Structural Health Monitoring; Bioinspired Smart Materials and Systems; Energy Harvesting, V002T02A004, September 16–18, 2013
Paper No: SMASIS2013-3093
DOI: https://doi.org/10.1115/SMASIS2013-3093
View Paper
PDF
Topics: Constitutive equations, Finite element analysis, Shape memory alloys, Design, Modeling, Engineering simulation, Engineering systems and industry applications, Engineers, Simulation, Structural elements (Construction)
Proceedings Papers

Analysis-Driven Design Optimization of a SMA-Based Slat-Cove Filler for Aeroacoustic Noise Reduction

William Scholten, Darren Hartl, Travis Turner
Proc. ASME. SMASIS2013, Volume 2: Mechanics and Behavior of Active Materials; Structural Health Monitoring; Bioinspired Smart Materials and Systems; Energy Harvesting, V002T02A006, September 16–18, 2013
Paper No: SMASIS2013-3104
DOI: https://doi.org/10.1115/SMASIS2013-3104
View Paper
PDF
Topics: Design, Fillers (Materials), Noise control, Optimization, Noise (Sound), Stress, Pressure, Actuators, Aircraft, Deflection
Proceedings Papers

Modeling of Shape Memory Alloy Wire Meshes Using Effective Lamina Properties for Improved Analysis Efficiency

Edwin Peraza-Hernandez, Darren Hartl, Dimitris Lagoudas
Proc. ASME. SMASIS2013, Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Integrated System Design and Implementation, V001T01A009, September 16–18, 2013
Paper No: SMASIS2013-3094
DOI: https://doi.org/10.1115/SMASIS2013-3094
View Paper
PDF
Topics: Modeling, Shape memory alloys, Wire, Finite element analysis, Laminates, Wire mesh, Calibration, Constitutive equations, Dimensions, Engineering simulation