Timothy William Simpson, PhD

    • 13905 Citations
    • 49 h-Index
    19952019
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    Research Output 1995 2019

    2019

    Assessment of anisotropic mechanical properties of a 3D printed carbon whisker reinforced composite

    Bakis, C. E., Haluza, R. T., Bartolai, J., Kim, J. J. & Simpson, T. W., Jan 1 2019, In : Advanced Composite Materials. 28, 5, p. 545-560 16 p.

    Research output: Contribution to journalArticle

    Carbon
    Mechanical properties
    Composite materials
    Printing
    3D printers
    3D printers
    Neural networks
    Linear regression
    Learning systems
    Learning algorithms

    Full Field Strain Measurement of Material Extrusion Additive Manufacturing Parts with Solid and Sparse Infill Geometries

    Bartolai, J., Wilson-Heid, A. E., Kruse, J. R., Beese, A. M. & Simpson, T. W., Mar 15 2019, In : JOM. 71, 3, p. 871-879 9 p.

    Research output: Contribution to journalArticle

    3D printers
    Strain measurement
    Extrusion
    Tensile strain
    Geometry
    2 Citations (Scopus)
    Product development
    Design of experiments
    Costs
    Students
    Economics
    1 Citation (Scopus)
    Students
    Mechanical engineering
    2018

    Achieving Functionally Graded Material Composition Through Bicontinuous Mesostructural Geometry in Material Extrusion Additive Manufacturing

    Stoner, B., Bartolai, J., Kaweesa, D. V., Meisel, N. A. & Simpson, T. W., Mar 1 2018, In : JOM. 70, 3, p. 413-418 6 p.

    Research output: Contribution to journalArticle

    3D printers
    Functionally graded materials
    Extrusion
    Geometry
    Chemical analysis

    A method to evaluate direct and indirect design dependencies between components in a product architecture

    Jung, S., Asikoglu, O. & Simpson, T. W., Oct 1 2018, In : Research in Engineering Design. 29, 4, p. 507-530 24 p.

    Research output: Contribution to journalArticle

    Networks (circuits)
    2 Citations (Scopus)

    A model for multi-input mechanical advantage in origami-based mechanisms

    Butler, J., Bowen, L., Wilcox, E., Shrager, A., Frecker, M. I., Vonlockette, P. R., Simpson, T. W., Lang, R. J., Howell, L. L. & Magleby, S. P., Dec 1 2018, In : Journal of Mechanisms and Robotics. 10, 6, 061007.

    Research output: Contribution to journalArticle

    Compliant mechanisms

    A physics-based virtual environment for enhancing the quality of deep generative designs

    Dering, M., Cunningham, J., Desai, R., Simpson, T. W., Yukish, M. A. & Tucker, C. S., Jan 1 2018, 44th Design Automation Conference. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 2A-2018).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Virtual Environments
    Virtual reality
    Physics
    Labeling
    Generative Models
    1 Citation (Scopus)

    Change propagation during prototyping: A case study of a robotic inspection system for dry nuclear waste storage casks

    Bracken, J., Brennan, S. N., Lissenden, III, C. J., Simpson, T. W., Van Sant, I., Reichard, K. M. & Ng, M., Jan 1 2018, 30th International Conference on Design Theory and Methodology. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 7).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Design Structure Matrix
    Prototyping
    Radioactive wastes
    Inspection
    Robotics

    Clustering design structure matrices: A comparison of methods using minimum description length

    Kulkarni, A., Jennings, C., Hoffman, M., Blanco, E., Terpenny, J. P. & Simpson, T. W., Jan 1 2018, p. 1114-1120. 7 p.

    Research output: Contribution to conferencePaper

    Genetic algorithms
    Complex networks
    Optimal design
    5 Citations (Scopus)

    Design and evaluation of an additively manufactured aircraft heat exchanger

    Saltzman, D., Bichnevicius, M., Lynch, S. P., Simpson, T. W., Reutzel, E. W., Dickman, C. & Martukanitz, R., Jun 25 2018, In : Applied Thermal Engineering. 138, p. 254-263 10 p.

    Research output: Contribution to journalArticle

    3D printers
    Heat exchangers
    Aircraft
    Geometry
    Heat transfer
    3 Citations (Scopus)
    Fidelity
    Modeling
    Model
    Structural Design
    Decision Model

    Evaluating the effectiveness of Virtual reality as an interactive educational resource for additive manufacturing

    Ostrander, J. K., Tucker, C. S., Simpson, T. W. & Meisel, N. A., Jan 1 2018, 20th International Conference on Advanced Vehicle Technologies; 15th International Conference on Design Education. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 3).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Virtual Reality
    Virtual reality
    Manufacturing
    Resources
    1 Citation (Scopus)

    Experimental sampling of the Z-axis error and laser positioning error of an EOSINT M280 DMLS machine

    Lu, Y., Badarinath, R., Lehtihet, E., Demeter, E. & Simpson, T. W., May 1 2018, In : Additive Manufacturing. 21, p. 501-516 16 p.

    Research output: Contribution to journalArticle

    Sampling
    Lasers
    1 Citation (Scopus)

    Glasses-type wearable computer displays: usability considerations examined with a 3D glasses case study

    Chang, J., Moon, S. K., Jung, K., Kim, W., Parkinson, M. B., Freivalds, A., Simpson, T. W. & Baik, S. P., May 4 2018, In : Ergonomics. 61, 5, p. 670-681 12 p.

    Research output: Contribution to journalArticle

    Wearable computers
    Glass
    Display devices
    fatigue
    rating
    3 Citations (Scopus)

    Impact of compositional gradients on selectivity of dissolvable support structures for directed energy deposited metals

    Lefky, C. S., Zucker, B., Nassar, A. R., Simpson, T. W. & Hildreth, O. J., Jul 1 2018, In : Acta Materialia. 153, p. 1-7 7 p.

    Research output: Contribution to journalArticle

    Stainless Steel
    Metals
    Stainless steel
    Materials properties
    Corrosion
    3 Citations (Scopus)

    Milling of Inconel 718 block supports fabricated using laser powder bed fusion

    Tripathi, V., Armstrong, A., Gong, X., Manogharan, G., Simpson, T. W. & Demeter, E., Aug 1 2018, In : Journal of Manufacturing Processes. 34, p. 740-749 10 p.

    Research output: Contribution to journalArticle

    Fusion reactions
    Powders
    Lasers
    Metals
    Machining
    5 Citations (Scopus)

    Predicting strength of additively manufactured thermoplastic polymer parts produced using material extrusion

    Bartolai, J., Simpson, T. W. & Xie, R., Jan 1 2018, In : Rapid Prototyping Journal. 24, 2, p. 321-332 12 p.

    Research output: Contribution to journalArticle

    Thermoplastics
    Extrusion
    Polymers
    3D printers
    Polycarbonates

    Product family redesign using additive manufacturing

    Jung, S. & Simpson, T. W., Jan 1 2018, 44th Design Automation Conference. American Society of Mechanical Engineers (ASME), Vol. 2B-2018.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Product Family
    Manufacturing
    Metric
    Unmanned aerial vehicles (UAV)
    1 Citation (Scopus)
    Visualization

    Teaching design freedom: Exploring the effects of design for additive manufacturing education on the cognitive components of students’ creativity

    Prabhu, R., Miller, S. R., Simpson, T. W. & Meisel, N. A., Jan 1 2018, 20th International Conference on Advanced Vehicle Technologies; 15th International Conference on Design Education. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 3).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Teaching
    Manufacturing
    Education
    Students

    The earlier the better? Investigating the importance of timing on effectiveness of design for additive manufacturing education

    Prabhu, R., Simpson, T. W., Miller, S. R. & Meisel, N. A., Jan 1 2018, 44th Design Automation Conference. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 2A-2018).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Timing
    Manufacturing
    Education
    Students
    2017
    3 Citations (Scopus)

    Adding Value to Trade Space Exploration When Designing Complex Engineered Systems

    Simpson, T. W., Miller, S. W., Tibor, E. B., Yukish, M. A., Stump, G. M., Kannan, H., Mesmer, B., Winer, E. H. & Bloebaum, C. L., Mar 1 2017, In : Systems Engineering. 20, 2, p. 131-146 16 p.

    Research output: Contribution to journalArticle

    Large scale systems
    Data visualization
    Decision making
    Satellites
    1 Citation (Scopus)

    A framework for the design and optimization of self-folding structures

    Bowen, L., Frecker, M. I., Simpson, T. W. & Strzelec, R. A., Jan 1 2017, 41st Mechanisms and Robotics Conference. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 5B-2017).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Folding
    Optimization
    Framework
    Design
    Trial and error
    1 Citation (Scopus)

    An investigation into the driving factors of creativity in design for additive manufacturing

    Barclift, M., Simpson, T. W., Nusiner, M. A. & Miller, S. R., Jan 1 2017, 19th International Conference on Advanced Vehicle Technologies; 14th International Conference on Design Education; 10th Frontiers in Biomedical Devices. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 3).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Manufacturing
    Students
    Engineering
    Sketching
    6 Citations (Scopus)

    A sequential decision process for the system-level design of structural frames

    Unal, M., Miller, S. W., Chhabra, J. P. S., Warn, G. P., Yukish, M. A. & Simpson, T. W., Nov 1 2017, In : Structural and Multidisciplinary Optimization. 56, 5, p. 991-1011 21 p.

    Research output: Contribution to journalArticle

    Structural frames
    Fidelity
    Design
    Nondominated Solutions
    Model
    6 Citations (Scopus)

    CAD-Integrated cost estimation and build orientation optimization to support design for metal additive manufacturing

    Barclift, M., Armstrong, A., Simpson, T. W. & Joshi, S. B., Jan 1 2017, 43rd Design Automation Conference. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 2A-2017).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Cost Estimation
    Computer aided design
    Manufacturing
    Metals
    14 Citations (Scopus)

    Comparisons of laser powder bed fusion additive manufacturing builds through experimental in situ distortion and temperature measurements

    Dunbar, A. J., Denlinger, E. R., Gouge, M. F., Simpson, T. W. & Michaleris, P., May 1 2017, In : Additive Manufacturing. 15, p. 57-65 9 p.

    Research output: Contribution to journalArticle

    3D printers
    Temperature measurement
    Powders
    Fusion reactions
    Geometry
    9 Citations (Scopus)

    Design, fabrication, and modeling of an electric-magnetic self-folding sheet

    Bowen, L., Springsteen, K., Ahmed, S., Arrojado, E., Frecker, M. I., Simpson, T. W., Ounaies, Z. & Vonlockette, P. R., Apr 1 2017, In : Journal of Mechanisms and Robotics. 9, 2, 021012.

    Research output: Contribution to journalArticle

    Dynamic models
    Fabrication
    Elastomers
    Polymers
    Terpolymers
    1 Citation (Scopus)

    Development of cad-integrated cost estimator to support design for additive manufacturing

    Armstrong, A. P., Barclift, M. & Simpson, T. W., Jan 1 2017, 37th Computers and Information in Engineering Conference. American Society of Mechanical Engineers (ASME), Vol. 1. 68330

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Manufacturing
    Estimator
    Costs
    Macros
    15 Citations (Scopus)

    Dissolvable Supports in Powder Bed Fusion-Printed Stainless Steel

    Lefky, C. S., Zucker, B., Wright, D., Nassar, A. R., Simpson, T. W. & Hildreth, O. J., Mar 1 2017, In : 3D Printing and Additive Manufacturing. 4, 1, p. 3-11 9 p.

    Research output: Contribution to journalArticle

    Stainless Steel
    Powders
    Fusion reactions
    Stainless steel
    Dissolution

    Education readiness levels (ERLS): A scale for assessing educational coursework and training modules

    Dinda, S., Simpson, T. W. & Gluck, L., Jan 1 2017, 19th International Conference on Advanced Vehicle Technologies; 14th International Conference on Design Education; 10th Frontiers in Biomedical Devices. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 3).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Manufacturing
    Education
    Module
    3D printers
    Target
    1 Citation (Scopus)

    Evaluating the discriminatory value and reliability of ideation metrics for their application to concept development and prototyping

    Menold, J., Simpson, T. W., Jablokow, K. W. & Suero, R., Jan 1 2017, 29th International Conference on Design Theory and Methodology. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 7).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Prototyping
    Product development
    Metric
    Evaluate
    New Product Development
    2 Citations (Scopus)

    Expediting build time, material, and cost estimation for material extrusion processes to enable mobile applications

    Dinda, S., Modi, D., Simpson, T. W., Tedia, S. & Williams, C. B., Jan 1 2017, 43rd Design Automation Conference. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 2A-2017).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Cost Estimation
    Extrusion
    Mobile Applications
    Printing
    Application programs

    Experimental comparison of a traditionally built versus additively manufactured aircraft heat exchanger

    Saltzman, D., Bichnevicius, M., Lynch, S. P., Simpson, T. W., Reutzel, E. W., Dickman, C. & Martukanitz, R., Jan 1 2017, AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics Inc., AIAA 2017-0902. (AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Heat exchangers
    Aircraft
    Pressure drop
    Geometry
    Heat transfer
    3 Citations (Scopus)

    Fast authentication of metal additive manufacturing

    Flank, S., Nassar, A. R., Simpson, T. W., Valentine, N. & Elburn, E., Aug 1 2017, In : 3D Printing and Additive Manufacturing. 4, 3, p. 143-147 5 p.

    Research output: Contribution to journalArticle

    3D printers
    Fluorescence spectroscopy
    Authentication
    Metals
    X rays
    1 Citation (Scopus)

    Multi-level value-driven design approaches for product family design

    Jung, S., Simpson, T. W. & Bloebaum, C., Jan 1 2017, 43rd Design Automation Conference. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 2B-2017).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Product Family
    Value Function
    Objective function
    Design
    Multidisciplinary Design Optimization
    13 Citations (Scopus)

    New modularity indices for modularity assessment and clustering of product architecture

    Jung, S. & Simpson, T. W., Jan 2 2017, In : Journal of Engineering Design. 28, 1, p. 1-22 22 p.

    Research output: Contribution to journalArticle

    Aircraft engines
    Clustering algorithms
    Optimal design
    19 Citations (Scopus)

    Preparing industry for additive manufacturing and its applications: Summary & recommendations from a National Science Foundation workshop

    Simpson, T. W., Williams, C. B. & Hripko, M., Jan 1 2017, In : Additive Manufacturing. 13, p. 166-178 13 p.

    Research output: Contribution to journalArticle

    3D printers
    Industry
    Students
    Curricula
    Education
    2 Citations (Scopus)

    Product family and product platform benchmarking with commonality and variety indices

    Simpson, T. W., Jan 1 2017, 43rd Design Automation Conference. American Society of Mechanical Engineers (ASME), Vol. 2B-2017.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Product Family
    Benchmarking
    Industry
    Product design
    Benchmark
    18 Citations (Scopus)
    engineering
    product design
    Product design
    Specifications
    Prototype
    1 Citation (Scopus)
    3D printers
    Metals
    Fusion reactions
    Powders
    Attitude control

    Special Section: Designing for additive manufacturing recent advances in design for additive manufacturing

    Boyer, J., Seepersad, C., Simpson, T. W., Williams, C. B. & Witherell, P., Oct 1 2017, In : Journal of Mechanical Design, Transactions Of the ASME. 139, 10, 100901.

    Research output: Contribution to journalEditorial

    3D printers
    2 Citations (Scopus)

    Two applications of design as a sequential decision process

    Miller, S. W., Simpson, T. W. & Yukish, M. A., Jan 1 2017, 43rd Design Automation Conference. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 2A-2017).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Fidelity
    Bilevel Optimization
    Lower Solution
    Finite Element Modeling
    Systems Engineering

    Value-driven design using discipline-based decomposition for a family of front-loading washing machines

    Jung, S., Simpson, T. W. & Bloebaum, C., Jan 1 2017, 43rd Design Automation Conference. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 2B-2017).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Washing machines
    Decomposition
    Decompose
    Washers
    Product Design
    2016
    16 Citations (Scopus)

    An integrated approach to product family redesign using commonality and variety metrics

    Jung, S. & Simpson, T. W., Oct 1 2016, In : Research in Engineering Design. 27, 4, p. 391-412 22 p.

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Application of topology optimization and design for additive manufacturing guidelines on an automotive component

    Reddy, S. N., Maranan, V., Simpson, T. W., Palmer, T. & Dickman, C. J., Jan 1 2016, 42nd Design Automation Conference. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 2A-2016).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Topology Optimization
    Shape optimization
    Manufacturing
    Costs
    2 Citations (Scopus)

    A value-driven design approach to optimize a family of front-loading washing machines

    Jung, S., Simpson, T. W., Bloebaum, C., Kannan, H., Winer, E. & Mesmer, B., Jan 1 2016, 42nd Design Automation Conference. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 2B-2016).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Washing machines
    Net Present Value
    Sales
    Optimise
    Product Family
    25 Citations (Scopus)

    Bistable compliant mechanism using magneto active elastomer actuation

    Crivaro, A., Sheridan, R., Frecker, M. I., Simpson, T. W. & Vonlockette, P. R., Aug 1 2016, In : Journal of Intelligent Material Systems and Structures. 27, 15, p. 2049-2061 13 p.

    Research output: Contribution to journalArticle

    Elastomers
    Compliant mechanisms
    Finite element method
    Actuators
    Magnetic fields