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Mechanical and Aerospace Engineering
USA
2026

D-Index & Metrics

Mechanical and Aerospace Engineering

D-Index
78
Citations
30608
World Ranking
236
National Ranking
114

Timothy W. Simpson publication distribution in Mechanical and Aerospace Engineering in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mechanical and Aerospace Engineering in 2026. The highlighted bar marks where Timothy W. Simpson sits on this spectrum.

47–56 publications: 10 scientists 57–66 publications: 23 scientists 67–76 publications: 32 scientists 77–86 publications: 62 scientists 87–96 publications: 67 scientists 97–106 publications: 91 scientists 107–116 publications: 113 scientists 117–126 publications: 115 scientists 127–136 publications: 130 scientists 137–146 publications: 140 scientists 147–156 publications: 155 scientists 157–166 publications: 132 scientists 167–176 publications: 133 scientists 177–186 publications: 130 scientists 187–196 publications: 140 scientists 197–206 publications: 115 scientists 207–216 publications: 125 scientists 217–226 publications: 117 scientists 227–236 publications: 99 scientists 237–246 publications: 92 scientists 247–256 publications: 100 scientists 257–266 publications: 95 scientists 267–276 publications: 88 scientists 277–286 publications: 77 scientists 287–296 publications: 74 scientists 297–306 publications: 74 scientists 307–316 publications: 62 scientists 317–326 publications: 70 scientists 327–336 publications: 59 scientists 337–346 publications: 58 scientists 347–356 publications: 45 scientists 357–366 publications: 44 scientists 367–376 publications: 36 scientists 377–386 publications: 41 scientists 387–396 publications: 32 scientists 397–406 publications: 23 scientists 407–416 publications: 28 scientists 417–426 publications: 27 scientists 427–436 publications: 25 scientists 437–446 publications: 23 scientists 447–456 publications: 23 scientists 457–466 publications: 20 scientists 467–476 publications: 12 scientists 477–486 publications: 24 scientists 487–496 publications: 18 scientists 497–506 publications: 12 scientists 507–516 publications: 13 scientists 517–526 publications: 21 scientists 527–536 publications: 12 scientists 537–546 publications: 8 scientists 547–556 publications: 16 scientists 557–566 publications: 3 scientists 567–576 publications: 11 scientists 577–586 publications: 6 scientists 587–596 publications: 5 scientists 597–606 publications: 6 scientists 607–616 publications: 7 scientists 617–626 publications: 7 scientists 627–636 publications: 10 scientists 637–646 publications: 4 scientists 647–656 publications: 3 scientists 657–658 publications: 2 scientists 659+ publications: 100 scientists
47 publications 659+

This scientist: 449 publications — 90th percentile

90% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 659 publications or more.

Timothy W. Simpson D-index placement in Mechanical and Aerospace Engineering in 2026

The chart shows the D-index (discipline H-index) distribution of Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026. The highlighted bar marks where Timothy W. Simpson sits on this spectrum.

30 D-Index: 83 scientists 31 D-Index: 113 scientists 32 D-Index: 144 scientists 33 D-Index: 153 scientists 34 D-Index: 189 scientists 35 D-Index: 158 scientists 36 D-Index: 139 scientists 37 D-Index: 127 scientists 38 D-Index: 130 scientists 39 D-Index: 126 scientists 40 D-Index: 104 scientists 41 D-Index: 100 scientists 42 D-Index: 107 scientists 43 D-Index: 101 scientists 44 D-Index: 103 scientists 45 D-Index: 79 scientists 46 D-Index: 88 scientists 47 D-Index: 70 scientists 48 D-Index: 83 scientists 49 D-Index: 44 scientists 50 D-Index: 64 scientists 51 D-Index: 56 scientists 52 D-Index: 50 scientists 53 D-Index: 48 scientists 54 D-Index: 58 scientists 55 D-Index: 52 scientists 56 D-Index: 48 scientists 57 D-Index: 42 scientists 58 D-Index: 34 scientists 59 D-Index: 42 scientists 60 D-Index: 37 scientists 61 D-Index: 42 scientists 62 D-Index: 44 scientists 63 D-Index: 22 scientists 64 D-Index: 33 scientists 65 D-Index: 29 scientists 66 D-Index: 23 scientists 67 D-Index: 29 scientists 68 D-Index: 24 scientists 69 D-Index: 19 scientists 70 D-Index: 34 scientists 71 D-Index: 26 scientists 72 D-Index: 19 scientists 73 D-Index: 18 scientists 74 D-Index: 19 scientists 75 D-Index: 14 scientists 76 D-Index: 19 scientists 77 D-Index: 8 scientists 78 D-Index: 18 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 17 scientists 82 D-Index: 11 scientists 83 D-Index: 16 scientists 84 D-Index: 7 scientists 85 D-Index: 9 scientists 86 D-Index: 8 scientists 87 D-Index: 6 scientists 88 D-Index: 6 scientists 89 D-Index: 7 scientists 90 D-Index: 10 scientists 91 D-Index: 4 scientists 92 D-Index: 4 scientists 93+ D-Index: 100 scientists
30 D-Index 93+

This scientist: 78 D-Index — 93rd percentile

93% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 93 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Mechanical and Aerospace Engineering in United States Leader Award
  • 2009 - Fellow of the American Society of Mechanical Engineers

Overview

Timothy W. Simpson is affiliated with Pennsylvania State University in the United States. Their research primarily falls within Engineering, with a focused body of work in Mechanical Engineering, Automotive Engineering, Industrial and Manufacturing Engineering, Experimental and Cognitive Psychology, and Human-Computer Interaction.

The main topics of Timothy W. Simpson's research include Additive Manufacturing and 3D Printing Technologies, Additive Manufacturing Materials and Processes, Manufacturing Process and Optimization, Design Education and Practice, Creativity in Education and Neuroscience, High Entropy Alloys Studies, and Virtual Reality Applications and Impacts.

Timothy W. Simpson has contributed to several peer-reviewed publications, with notable recent papers listed below:

  • Research and application of machine learning for additive manufacturing, 2022, Additive manufacturing
  • Mechanical properties of additively manufactured metal lattice structures: Data review and design interface, 2020, Additive manufacturing
  • Is Additive Manufacturing an Environmentally and Economically Preferred Alternative for Mass Production?, 2023, Environmental Science & Technology
  • Six-Sigma Quality Management of Additive Manufacturing, 2020, Proceedings of the IEEE
  • Effect of processing parameters on pore structures, grain features, and mechanical properties in Ti-6Al-4V by laser powder bed fusion, 2022, Additive manufacturing

The scientist collaborates with several frequent co-authors, including:

  • Nicholas A. Meisel
  • Rohan Prabhu
  • Scarlett R. Miller
  • Allison M. Beese
  • Qixiang Luo

The most frequent publication venues for their work include:

  • Additive manufacturing
  • Journal of Mechanical Design
  • Data in Brief
  • Journal of Computing and Information Science in Engineering
  • Journal of Engineering Design

Timothy W. Simpson was awarded the title of Fellow of the American Society of Mechanical Engineers in 2009.

Best Publications

  • Metamodels for Computer-Based Engineering Design: Survey and Recommendations

    Timothy W. Simpson;J. D. Poplinski;P. N. Koch;J. K. Allen

  • Comparative studies of metamodelling techniques under multiple modelling criteria

    R. Jin;W. Chen;Timothy William Simpson

  • Kriging Models for Global Approximation in Simulation-Based Multidisciplinary Design Optimization

    Timothy W. Simpson;Timothy M. Mauery;John J. Korte;Farrokh Mistree

  • Product family design and platform-based product development: a state-of-the-art review

    Jianxin (Roger) Jiao;Timothy W. Simpson;Zahed Siddique

  • Use of Kriging Models to Approximate Deterministic Computer Models

    Jay D. Martin;Timothy W. Simpson

  • Product platform design and customization: Status and promise

    Timothy W. Simpson

  • Product platform design: method and application

    Timothy W. Simpson;Jonathan R. Maier;Farrokh Mistree

  • Comparison of response surface and kriging models for multidisciplinary design optimization

    Timothy W. Simpson;John J. Korte;Timothy M. Mauery;Farrokh Mistree

  • 3D Printing Disrupts Manufacturing: How Economies of One Create New Rules of Competition

    Irene J. Petrick;Timothy W. Simpson

  • Analysis of Support Vector Regression for Approximation of Complex Engineering Analyses

    Stella M. Clarke;Jan H. Griebsch;Timothy William Simpson

  • Sampling Strategies for Computer Experiments: Design and Analysis

    T. Simpson;L. Dennis;W. Chen

  • Approximation methods in multidisciplinary analysis and optimization: a panel discussion

    T.W. Simpson;A.J. Booker;D. Ghosh;A.A. Giunta

  • Product platform and product family design: Methods and applications

    Timothy W. Simpson;Zahed Siddique;Jianxin Roger Jiao

  • Metamodeling in Multidisciplinary Design Optimization: How Far Have We Really Come?

    Felipe A. C. Viana;Timothy W. Simpson;Vladimir Balabanov;Vasilli Toropov

  • Computationally inexpensive metamodel assessment strategies

    Martin Meckesheimer;Russell R. Barton;Timothy W. Simpson;Andrew J. Booker

  • Design and analysis of computer experiments in multidisciplinary design optimization: A review of how far we have come - Or not

    Timothy Simpson;Vasilli Toropov;Vladimir Balabanov;Felipe Viana

  • A concept exploration method for product family design

    Timothy W. Simpson

  • Computationally Inexpensive Metamodel Assessment Strategies

    Martin Meckesheimer;Andrew J. Booker;Russell R. Barton;Timothy W. Simpson

  • A Variation-Based Method for Product Family Design

    Raviraj U. Nayak;Wei Chen;Timothy W. Simpson

  • A Variation-Based Methodology for Product Family Design

    Raviraj U. Nayak;Wei Chen;Timothy W. Simpson

  • Comparative studies of metamodeling techniques under multiple modeling criteria

    Ruichen Jin;Wei Chen;Timothy W. Simpson

Frequent Co-Authors

Mary Frecker
Mary Frecker Pennsylvania State University
Soundar R. T. Kumara
Soundar R. T. Kumara Pennsylvania State University
Kemper Lewis
Kemper Lewis University at Buffalo, State University of New York
Russell R. Barton
Russell R. Barton Pennsylvania State University
Farrokh Mistree
Farrokh Mistree University of Oklahoma
Janet K. Allen
Janet K. Allen University of Oklahoma
Patrick M. Reed
Patrick M. Reed Cornell University
William C. Regli
William C. Regli University of Maryland, College Park
Carolyn Conner Seepersad
Carolyn Conner Seepersad The University of Texas at Austin
Long Qing Chen
Long Qing Chen Pennsylvania State University

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Related Online Degrees & Career Pathways

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