Chad B. Hovey
ORCID

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Blunt Head Impact, Brain Injury, and Advanced Combat Helmet (ACH) Milspec

E-4. Terpsma R, Carlsen RW, Szalkowski R, Malave S, Fawzi AL, Franck C, Hovey C. Head impact modeling to support a rotational combat helmet drop test. Military medicine. 2021 Sep 11. Link or download

E-3. Terpsma RJ, Hovey CB. Blunt Impact Brain Injury using Cellular Injury Criterion. SAND2020-11444. Download

E-2. Hovey C, Fawzi A, Szalkowski R, Malave S, Terpsma R, Franck C. Why the helmet military specification test should be revised to include a rotational component. Military Health System Research Symposium (MHSRS), accepted to Computational Modeling session but online only due to COVID-19, August 24-27, 2020, Kissimmee, FL. SAND2020-3786A.

E-1. Hovey C, Terpsma R, Fawzi A, Szalkowski R, Malave S, Franck C. Investigation of incracranial strains and strain rates in a 3D human head model during military specification impact test. Military Health System Research Symposium (MHSRS), August 19, 2019, Kissimmee, FL. SAND2019-9601O. Download

Terpsma_2021_001_Fig_1.png

Experimental drop test (A) linear constrained configuration and (B) modified configuration, and (C) high-fidelity human head digital twin.
Terpsma_2021_001_Fig_3

Population of white and gray matter finite element tensile maximum principal strain (MPS) and maximum principal strain rate (MPSR) of the Green-Lagrange strain tensor for the (A) linear constrained configuration and (B) modified configuration when the 95th percentile strain has reached a maximum in each of the respective simulations.
Terpsma_2021_001_Fig_4

Axial sections of maximum principal strain of the Green-Lagrange strain tensor (left) linear constrained configuration and (right) modified configuration.

High Fidelty Human Digital Twin

nih-axial-section

Representative axial section from the Ackerman, MJ. (1998). The Visible Human Project. Proceedings of the IEEE, 86(3):504–511.
bob-frontal-half-cutaway

High fidelity head model.
element_scale_v_density_5

Element count versus element characteristic length.

Occupant Ejections during Rollover Crashes and Planar Homography for Reconstruction

D-4. Hovey CB, Toglia A. Four-Point Planar Homography Algorithm for Rectification Photogrammetry: Development and Application, SAE Technical Paper 2013-01-0780, 2013. Link or download

D-3. Hovey CB, Raphael EH, Xu HZ. Validation of Occupant Trajectory Model using the Ford Expedition Dolly Rollover Experimental Test Data, SAE Technical Paper 2013-01-0472, 2013. Link or download

D-2. Hovey CB, Kaplan ML, Piziali RL. Occupant Trajectory Model using Case-Specific Accident Reconstruction Data for Vehicle Position, Roll, and Yaw. SAE Technical Paper 2008-01-0517, 2008. Link or download

D-1. Hovey CB, Kaplan ML, Piziali RL. Model for Occupants Ejected from Vehicles with Roll and Yaw, American Society of Biomechanics, Stanford, CA, 2007. Conference Proceeding. Download

occupant_ejection_model_experiment.png

Expedition dolly rollover occupant ejection model (left) and test (right).

Video available at https://youtu.be/JvJtuLZJT4A

occupant_ejection_paired_views

Offboard (left) and onboard (right) paired views.

Video available at https://youtu.be/i_9K5Gz8l4Y

Unilateral Large-Slip Contact for Computational Mechanics of Diarthrodial Joints

C-14. Heegaard JH, Leyvraz PF, Hovey CB. A Computer Model To Simulate Patellar Biomechanics Following Total Knee Replacement: The Effects of Femoral Component Alignment, Clinical Biomechanics, 16:415-423, 2001. Download

C-13. Kurtz SM, Ochoa JA, Hovey CB, White CV. Simulation of Initial Frontside and Backside Wear Rates in a Modular Acetabular Component with Multiple Screw Holes, Journal of Biomechanics, 32:967-976, 1999. Download

C-12. Hovey CB. Stress and Motion in Diarthrodial Joints Using Coupled Nonlinear Elastodynamics, Rigid Body Dynamics, and Large-Slip Contact-Impact, Doctoral Thesis, Stanford University, Stanford, CA, 2000. Download

C-11. Hovey CB, Heegaard JH, Beaupre GS, Zajac FE. Coupling Stress Analysis of Joints with Human Gait To Improve Wear Prediction in Joint Replacements, 2nd National Rehabilitation Research and Development Conference, Washington, DC, 2000.

C-10. Kurtz SM, Ochoa JA, Hovey CB, White CV. Frontside vs. Backside Wear in an Acetabular Component with Multiple Screw Holes, 45th Annual Meeting, Orthopaedic Research Society, Anaheim, CA, 1999. Download

C-9. Hovey CB, Heegaard JH, Coupled Rigid-Deformable Body Formulation for Analysis of Joint Stress and Deformation During Gait, International Mechanical Engineering Congress and Exposition, Nashville, TN, 1999. Download

C-8. Heegaard JH, Hovey CB. Hierarchical Models for Large-Scale Simulations of the Musculoskeletal System, 4th International Symposium on Computer Methods in Biomedical Engineering, Lisbon, Portugal, 1999.

C-7. Heegaard JH, Hovey CB. Coupling of a Rigid Multibody System with a Deformable Continuum Using an Augmented Lagrangian Formalism, 5th U.S. National Congress on Computational Mechanics, Boulder, CO, 1999. Download

C-6. Hovey CB, Heegaard JH. Viscous Effects May Regulate Endochondral Ossification Patterns During Joint Formation, 11th Conference of the European Society of Biomechanics, Toulouse, France, 1998. Download

C-5. Heegaard JH, Hovey CB. Viscous Effects May Regulate Ossification Patterns During Joint Formation, Journal of Biomechanics, Vol 31, Supplement 1, Page 62, 1998. Abstract.

C-4. Heegaard JH, Hovey CB, Kaplan ML. Fast Convergent Solvers for Augmented Lagrangian Equations in Contact Mechanics, 10th International Conference of Computational Engineering Science, Atlanta, GA, 1998. Download

C-3. Kaplan ML, Hovey CB, Heegaard. Energy Conserving Algorithm for Gait Simulation with Persistent Contact, ASME International Mechanical Engineering Congress and Exposition, Anaheim, CA, 1998. Download

C-2. Hovey CB, Kaplan ML, Heegaard JH. A Viscoelastic Model for Finite Deformation of Soft Tissue, ASME International Mechanical Engineering Congress and Exposition, Anaheim, CA, 1998. Download

C-1. Heegaard JH, Hovey CB, Kaplan ML. Computer Assisted Planning for Knee Surgery: A Patient Specific Approach, International Mechanical Engineering Congress and Exposition, Atlanta, GA, 1996. Download

Nonlinear Buckling of Laminates

B-2. Vinogradov AM, Hovey CB. Large Buckling Deformations of General Laminates, 10th International Conference on Composite Materials, 5:11-17, 1995. Download

B-1. Vinogradov AM, Hovey CB. Nonlinear Buckling Characteristics of Regular Asymmetric Laminates, Materials and Design Technology, 71:77-82, 1995. Download

Teaching

A-2. Hovey CB. Formulation and Python Implementation of Bezier and B-Spline Geometry. SAND2022-7702C. 2022-06-08. DOI or Download

A-1. Hovey CB, Vincenz K, Goodson S, MacMillan S. User Interface Principles, MSC Software User Interface Reference. Download

 

Copyright © 1994-2022 Chad B. Hovey. All rights reserved.