Development and validation of a Renault Mégane finite element model for full-scale pedestrian impact simulations

In this report, the development and validation of a Finite Element (FE) vehicle model is presented which is intended for simulation of past full-scale pedestrian experiments with post-mortem human subjects. The model is primarily intended for evaluation of the pedestrian Human Body Model (HBM) “Total HUman Model for Safety” (THUMS) version 4.0 but can also be used for evaluation of other FE-HBM models

Influence of vehicle shape and stiffness on the pedestrian lower extremity injuries: review of current pedestrian lower leg test procedure

This study aims at evaluating the current pedestrian lower leg test procedure with respect to the human response in a pedestrian accident. The test procedure is examined for a variety of representative cars of the European fleet. The investigation is purely based on numerical simulations carried out using the regulatory lower leg impactor, as described in the Directive 2004/90/EC, and compared to simulations where the impactor is replaced by the human FE model THUMS (Total HUman Model for Safety). THUMS was developed in collaboration by Toyota Motor Corporation and Toyota Central R&D Labs.. It has been extensively validated under pedestrian impact conditions and its response has been proven to be biofidelic. Therefore, THUMS results are considered as reference for the analysis of the lower leg impactor simulation results. THUMS and impactor responses are compared looking at: - Their kinematics, accelerations, velocities and deflections, - Their injury prediction, - And finally, their contact forces with the vehicle structures. This work was carried out in the frame of the sub-project Nº3 on “Pedestrians and Cyclist accidents” of the European funded project “Advanced PROtection SYStem”, APROSYS

Evaluation of Human and Anthropomorphic Test Device Finite Element Models under Spaceflight Loading Conditions

In an effort to develop occupant protection standards for future multipurpose crew vehicles, the National Aeronautics and Space Administration (NASA) has looked to evaluate the test device for human occupant restraint with the modification kit (THORK) anthropomorphic test device (ATD) in relevant impact test scenarios. With the allowance and support of the National Highway Traffic Safety Administration, NASA has performed a series of sled impact tests on the latest developed THORK ATD. These tests were performed to match test conditions from human volunteer data previously collected by the U.S. Air Force. The objective of this study was to evaluate the THORK finite element (FE) model and the Total HUman Model for Safety (THUMS) FE model with respect to the tests performed. These models were evaluated in spinal and frontal impacts against kinematic and kinetic data recorded in ATD and human testing. Methods: The FE simulations were developed based on recorded pretest ATD/human position and sled acceleration pulses measured during testing. Predicted responses by both human and ATD models were compared to test data recorded under the same impact conditions. The kinematic responses of the models were quantitatively evaluated using the ISOmetric curve rating system. In addition, ATD injury criteria and human stress/strain data were calculated to evaluate the risk of injury predicted by the ATD and human model, respectively. Results: Preliminary results show wellcorrelated response between both FE models and their physical counterparts. In addition, predicted ATD injury criteria and human model stress/strain values are shown to positively relate. Kinematic comparison between human and ATD models indicates promising biofidelic response, although a slightly stiffer response is observed within the ATD. Conclusion: As a compliment to ATD testing, numerical simulation provides efficient means to assess vehicle safety throughout the design process and further improve the design of physical ATDs. The assessment of the THORK and THUMS FE models in a spaceflight testing condition is an essential first step to implementing these models in the computational evaluation of spacecraft occupant safety. Promising results suggest future use of these models in the aerospace field

Desarrollo de una metodología para el análisis de atropello de peatones utilizando modelos de elementos finitos del cuerpo humano.

Los peatones son los usuarios más vulnerables de las vías públicas, y su interacción con la geometría y rigidez del vehículo que les atropella es decisiva en la aparición o no de lesiones. Este artículo analiza estos accidentes mediante el análisis de dos modelos de atropello con diferentes vehículos (turismo y todoterreno) en un escenario de atropello típico utilizando una metodología combinada multibody-elementos finitos, que usa técnicas multibody en el vehículo y de elementos finitos para el peatón. En estos modelos se analizan las cinemáticas del peatón así como las lesiones que aparecen en ambos casos mostrando las diferentes prioridades en protección de peatones que se deben tener en cuenta en el desarrollo de futuros vehículos más seguros para este colectiv

Method Development for Compression Testing of Synthetic Ballistic Gelatine

Poster contribution to the Defence and Security Doctoral Symposium 2023