Daniel Perez Rapela (PhD)
Dr. Perez-Rapela has over 10 years’ experience in the field of injury biomechanics and passive safety, with a special interest in vehicle occupant protection, Human Body Models (HBMs) and machine learning. After graduating with a BS+MS in Industrial Engineering at the University of Zaragoza in 2010, Dr. Perez-Rapela joined IDIADA and later the VW-Group where he led the development of multiple vehicles as lateral occupant protection leader in the simulation department of SEAT. Dr. Perez-Rapela graduated with a PhD in Mechanical and Aerospace Engineering from the University of Virginia in 2020, where he holds a post-doctoral researcher position. During his research career, Dr. Perez-Rapela has, among other contributions, developed procedures for the full automation of HBM simulation and morphing, and integrated machine learning techniques in the field of injury biomechanics. These contributions to the field of computational biomechanics have enabled him to develop methodologies for the stochastic analysis of vehicle safety taking into account human and non-human variability, and modeling uncertainty. His work, which includes multiple PMHS tests and HBM simulations, is available in several peer-reviewed scientific publications.
After earning his PhD, Dr. Perez Rapela joined UVAs Center for Applied Biomechanics as a Research Associate.
Dissertation: Methodology for the Evaluation of Human Response Variability to Intrinsic and Extrinsic Factors Including Uncertainties
Carolyn Roberts (PhD)
With seven years’ experience with injury biomechanics research, Dr. Roberts leads the UVA-CAB’s efforts in developing injury prediction tools for the female population. This includes fundamental research on the roles of sex-related geometric, material, and hormonal factors on differences in biomechanics and injury susceptibility between male and females. Her work has been applied to investigate the validity of standard scaling practices for translating between male and female response, and the factors warranting generation of new biomechanical data specifically for females. In addition to this fundamental work, Dr. Roberts has led the UVA-CAB’s efforts in generating female cadaveric data, biofidelity corridors, and injury risk functions for the 5th percentile female THOR lower extremities. Recently her work has focused on field data analysis for injury risk factor evaluation across age and sex, analysis of biofidelity of female injury prediction surrogates, and quantification of belt fit and restraint effectiveness across different external body shapes and skeletal alignment.
After earning her PhD, Dr. Roberts joined UVAs Center for Applied Biomechanics as a Research Associate.
Dissertation: Sex-based Geometric Differences in the Lower Extremity and their Effect on Injury in the Automotive Crash Environment
Varun Bollapragada (PhD)
Dr. Bollapragada has 9 years of experience in the field of biomechanics and automotive safety. His doctoral research is focused on understanding the influence of the long terms effects of disability associated with injuries on vehicle design in the context of pedestrian safety. He is an expert in multibody modeling and his notable accomplishments include development of multibody models of a sedan and SUV to study pre-ballistic maneuvers in rollover crashes, and a multibody human model representing a 50th percentile male which has been used by OEM’s in improving their vehicle design for pedestrian safety. He has also performed many modeling studies using finite element and multibody human models to assess and improve biofidelity. He has used computational models for sensitivity analysis using design of experiments and Monte Carlo Analysis. He has performed component-level and whole-body cadaveric and ATD tests to develop response corridors and to evaluate biofidelity. His current research interests include subject specific finite element model development from CT scan data using morphing techniques.
After earning his PhD, Dr. Bollapragada joined UVAs Center for Applied Biomechanics as a Research Associate.
Dissertation: The Influence of Disabling Injuries on the Design of the Vehicle Front End for Pedestrian Safety
Ryan Neice (MS)
Ryan fulfilled his graduate research requirements at UVA’s Center for Applied Biomechanics from 2017-2019, under his advisor Dr. Matthew Panzer. His graduate research focused on developing an injury predictive pelvis finite element model for lateral dynamic loading. The force response and injury predictions of the pelvis FE model were validated with cadaveric pelvis tests performed at UVA. A simulation matrix was then constructed, leading to an injury threshold analysis, to determine whether anterior or posterior pelvis force could better predict pelvis fracture. Using injury risk functions constructed from simulation data, it was determined that posterior pelvis force was a superior injury prediction metric, suggesting that future side impact ATD designs include posterior pelvis load cells. In addition to his thesis, Ryan worked on other side projects during his time at CAB including: modeling lower extremity response during under body blast loading, testing computational methods to simulate tissue pretensioning, cadaver PMHS experiments, and constitutive modeling.
Since earning his M.S., Ryan has joined the US Army Research Laboratory as a Biomechanical Engineer, evaluating the protection capabilities of current military helmet designs and developing improved protection strategies against TBI-inducing blunt impact.
Thesis: Development and Validation of a Pelvis Finite Element Model for Side Panel Intrusion Threats
Jacek Toczyski (PhD)
Dr. Toczyski has over 8 years of experience in the field of biomechanics and automotive safety and more than 10 years of experience in the field of computational mechanics. He graduated with Master’s degree from the Warsaw University of Technology (Warsaw, Poland). In 2019, he defended his PhD dissertation at the University of Virginia Center for Applied Biomechanics. His doctoral research was focused on motion prediction based on the data obtained from inertial sensors. During his stay at UVa, Dr. Toczyski was also involved in projects related to occupant safety in rollover crashes, in development and evaluation of new crash test dummies, and in material characterization of hard tissue.
After earning his PhD, Jacek joined the passive safety team at Tesla, Inc. (Tesla Crash Lab)