Timothy William Simpson, PhD

    • 13652 Citations
    • 49 h-Index
    19952019
    If you made any changes in Pure, your changes will be visible here soon.

    Research Output 1995 2019

    Filter
    Article
    2019

    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
    2 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
    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
    2 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
    1 Citation (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
    3 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
    1 Citation (Scopus)
    Visualization
    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
    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
    13 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
    8 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
    12 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
    2 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
    11 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
    16 Citations (Scopus)
    engineering
    product design
    Product design
    Specifications
    Prototype
    1 Citation (Scopus)
    3D printers
    Metals
    Fusion reactions
    Powders
    Attitude control
    2016
    13 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

    23 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
    27 Citations (Scopus)

    Development of experimental method for in situ distortion and temperature measurements during the laser powder bed fusion additive manufacturing process

    Dunbar, A. J., Denlinger, E. R., Heigel, J., Michaleris, P., Guerrier, P., Martukanitz, R. & Simpson, T. W., Oct 1 2016, In : Additive Manufacturing. 12, p. 25-30 6 p.

    Research output: Contribution to journalArticle

    3D printers
    Temperature measurement
    Powders
    Fusion reactions
    Lasers
    15 Citations (Scopus)

    Dissolvable metal supports for 3D direct metal printing

    Hildreth, O. J., Nassar, A. R., Chasse, K. R. & Simpson, T. W., Jun 1 2016, In : 3D Printing and Additive Manufacturing. 3, 2, p. 91-97 7 p.

    Research output: Contribution to journalArticle

    3D printers
    Printing
    Metals
    Machining
    Electrochemical etching
    20 Citations (Scopus)

    Global Views on Modular Design Research: Linking Alternative Methods to Support Modular Product Family Concept Development

    Otto, K., Hölttä-Otto, K., Simpson, T. W., Krause, D., Ripperda, S. & Moon, S. K., Jul 1 2016, In : Journal of Mechanical Design, Transactions of the ASME. 138, 7, 071101.

    Research output: Contribution to journalArticle

    Industry
    Costs
    10 Citations (Scopus)

    Predicting Coherency Loss of γ Precipitates in IN718 Superalloy

    Ji, Y., Lou, Y., Qu, M., Rowatt, J. D., Zhang, F., Simpson, T. W. & Chen, L., Jun 1 2016, In : Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 47, 6, p. 3235-3247 13 p.

    Research output: Contribution to journalArticle

    heat resistant alloys
    Superalloys
    Precipitates
    precipitates
    hardening
    7 Citations (Scopus)
    Dimensionality
    Visual Analytics
    Multiobjective optimization
    Trade-offs
    Optimization Problem
    6 Citations (Scopus)

    Toward Rapid Manufacturability Analysis Tools for Engineering Design Education

    Lynn, R., Saldana, C., Kurfess, T., Reddy, N., Simpson, T. W., Jablokow, K. W., Tucker, T., Tedia, S. & Williams, C., Jan 1 2016, In : Procedia Manufacturing. 5, p. 1183-1196 14 p.

    Research output: Contribution to journalArticle

    Education
    3D printers
    Students
    Software packages
    Costs
    14 Citations (Scopus)

    Trade space exploration of magnetically actuated origami mechanisms

    Bowen, L., Springsteen, K., Frecker, M. I. & Simpson, T. W., Jun 1 2016, In : Journal of Mechanisms and Robotics. 8, 3, 031012.

    Research output: Contribution to journalArticle

    Dynamic models
    Magnetic materials
    Research laboratories
    Stiffness
    Robots
    2015
    34 Citations (Scopus)

    (Re)Designing for Part Consolidation: Understanding the Challenges of Metal Additive Manufacturing

    Schmelzle, J., Kline, E. V., Dickman, C. J., Reutzel, E. W., Jones, G. & Simpson, T. W., Nov 1 2015, In : Journal of Mechanical Design, Transactions of the ASME. 137, 11, 111711.

    Research output: Contribution to journalArticle

    3D printers
    Consolidation
    Metals
    Inspection
    Engineers
    2 Citations (Scopus)
    Chromosomes
    Clustering algorithms
    Genetic algorithms
    Modularity
    Clustering
    7 Citations (Scopus)

    AM needs MEs

    Simpson, T. W., Aug 1 2015, Mechanical Engineering, 137, 8, p. 30-35 6 p.

    Research output: Contribution to specialist publicationArticle

    40 Citations (Scopus)
    Elastomers
    Dynamic models
    Stiffness
    Software packages
    Torsional stress
    13 Citations (Scopus)

    The impact of virtual product dissection environments on student design learning and self-efficacy

    Toh, C., Miller, S. R. & Simpson, T. W., Mar 4 2015, In : Journal of Engineering Design. 26, 1-3, p. 48-73 26 p.

    Research output: Contribution to journalArticle

    Dissection
    Students
    Virtual reality
    Education
    2014
    5 Citations (Scopus)

    Effects of weight balance on a 3D TV shutter type glasses: Subjective discomfort and physical contact load on the nose

    Chang, J., Jung, K., Kim, W., Moon, S. K., Freivalds, A., Simpson, T. W. & Baik, S. P., Nov 1 2014, In : International Journal of Industrial Ergonomics. 44, 6, p. 801-809 9 p.

    Research output: Contribution to journalArticle

    Nose
    Glass
    contact
    Weights and Measures
    rating
    158 Citations (Scopus)

    Metamodeling in multidisciplinary design optimization: How far have we really come?

    Viana, F. A. C., Simpson, T. W., Balabanov, V. & Toropov, V., Jan 1 2014, In : AIAA journal. 52, 4, p. 670-690 21 p.

    Research output: Contribution to journalArticle

    Experiments
    Visualization
    Design optimization
    Availability
    43 Citations (Scopus)

    Platform design variable identification for a product family using multi-objective particle swarm optimization

    Moon, S. K., Park, K. J. & Simpson, T. W., Jan 1 2014, In : Research in Engineering Design. 25, 2, p. 95-108 14 p.

    Research output: Contribution to journalArticle

    Particle swarm optimization (PSO)
    Customer satisfaction
    Decision making
    Evolutionary algorithms
    Aviation
    36 Citations (Scopus)

    Toward Metamodels for Composable and Reusable Additive Manufacturing Process Models

    Witherell, P., Feng, S., Simpson, T. W., Saint John, D. B., Michaleris, P., Liu, Z., Chen, L. & Martukanitz, R., Dec 1 2014, In : Journal of Manufacturing Science and Engineering, Transactions of the ASME. 136, 6, 061025-1.

    Research output: Contribution to journalArticle

    3D printers
    Powder metals
    Reusability
    Fusion reactions
    2013
    3 Citations (Scopus)
    Curricula
    archaeology
    engineering
    curriculum
    Students
    2 Citations (Scopus)

    A study on situated cognition: Product dissection's effect on redesign activities

    Grantham, K., Kremer, G. E. O., Simpson, T. W. & Ashour, O., Dec 11 2013, In : Advances in Engineering Education. 3, 4

    Research output: Contribution to journalArticle

    Dissection
    cognition
    Coffee
    creativity
    functionality
    63 Citations (Scopus)

    Many objective visual analytics: Rethinking the design of complex engineered systems

    Woodruff, M. J., Reed, P. M. & Simpson, T. W., Jul 1 2013, In : Structural and Multidisciplinary Optimization. 48, 1, p. 201-219 19 p.

    Research output: Contribution to journalArticle

    Visual Analytics
    Large scale systems
    Complex Systems
    Aviation
    Aircraft
    2012
    47 Citations (Scopus)

    From user requirements to commonality specifications: An integrated approach to product family design

    Simpson, T. W., Bobuk, A., Slingerland, L. A., Brennan, S. N., Logan, D. & Reichard, K. M., Apr 1 2012, In : Research in Engineering Design. 23, 2, p. 141-153 13 p.

    Research output: Contribution to journalArticle

    Specifications
    Unmanned vehicles
    Ground vehicles
    Data visualization
    Product development
    7 Citations (Scopus)
    Product design
    Product development
    Personal computers
    Virtual reality
    Artificial intelligence
    43 Citations (Scopus)

    New product development practices and early-stage firms: Two in-depth case studies

    Marion, T. J., Friar, J. H. & Simpson, T. W., Jul 1 2012, In : Journal of Product Innovation Management. 29, 4, p. 639-654 16 p.

    Research output: Contribution to journalArticle

    Product development
    Innovation
    New product development
    Planning
    Large firms
    24 Citations (Scopus)
    Visualization
    Data mining
    Agglomeration
    2011
    46 Citations (Scopus)

    A module-based service model for mass customization: Service family design

    Moon, S. K., Shu, J., Simpson, T. W. & Tirupatikumara, S. R., Mar 1 2011, In : IIE Transactions (Institute of Industrial Engineers). 43, 3, p. 153-163 11 p.

    Research output: Contribution to journalArticle

    Game theory
    Quality of service
    Innovation
    Productivity
    Costs