Experimental Study of a Compliant Bumper System

Bunketorp, Olle; Romanus, B.; Hansson, Tommy; Aldman, Bertil; Thorngren, L.; Eppinger, Rolf H.

doi:10.4271/831623

Cited by 21 publications

(5 citation statements)

References 1 publication

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“…In experimental tests with cadavers and computer simulations the coupling of moderate alterations in bumper compliance with altered bumper height, geometry, and orientation have shown reduced injury to the lower limbs 13. In general, lower bumpers permit the femur and tibia to rotate together as the upper body falls on the car, thus limiting lateral bending of the knee 14.…”

Section: Injury Profiles and Countermeasuresmentioning

confidence: 99%

Designing road vehicles for pedestrian protection

Crandall

2002

BMJ

133

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Section: Injury Profiles and Countermeasuresmentioning

confidence: 99%

Designing road vehicles for pedestrian protection

Crandall

2002

BMJ

133

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“…In the 1980s, researchers used an SBS to conduct dummy-to-bumper impact tests and investigated the effective changes in vehicle design necessary to reduce the severity of pedestrian injuries. [8][9][10] In the meantime, simplified FE bumper models were also developed to conduct sensitivity studies of the design variables. 3,4 Another type of simplified bumper model is the so-called multi-body parametric bumper model, built using MADYMO software, to carry out the DOE and optimization studies.…”

Section: Introductionmentioning

confidence: 99%

A bumper model with dynamic contact stiffness for simulations of pedestrian legform impacts

Huang

Xia

Nie

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part D:

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Car-to-pedestrian accidents have become a global problem, and car manufacturers have made great efforts to redesign the car for pedestrian protection. For fast computer simulations of pedestrian legform-to-bumper impacts, which are usually needed for the large design-of-experiments matrix, quite a number of simplified bumper models have been built to represent detailed finite element models adopted from full-vehicle models. However, it has been a difficult balance between simplifying the structure to achieve fast computation and keeping the essential characteristics to obtain valid results. This paper documents a development and validation of a simplified bumper system model. The spring stiffness properties are determined by considering the loading rate effect and the local deformation effect of the vehicle’s front-end structure, which is essential for legform impact simulations. To validate the simplified bumper system model, the simulation results from the simplified bumper system model and from a detailed bumper system model are compared. This study also indicates that, to improve the responses of the legform bending and shear, the vehicle’s bumper should be modelled as two separate spring systems since the impact interaction is within the knee joint centre of the legform.

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“…In the past, the response of the lower limb, especially the knee joint, in car-pedestrian crashes has been studied using the passive tools such as Post Mortem Human Specimens (PMHS) (Bunketorp et al, 1981;1983;Aldman et al, 1985;Kajzer et al, 1990;1997;1999;Ramet et al, 1995;Bhalla et al, 2003;Kerrigan et al, 2003;Bose et al, 2004;Ivarsson et al, 2004;, mechanical surrogates (the EEVC legform by TRL; FlexPLI (Konosu et al, 2005); Polar II pedestrian dummy by Honda R&D; frangible legform by Dunmore et al, 2005) and the passive lower limb FE models (Schuster et al, 2000;Maeno et al, 2001;Takahashi et al, 2001;Matsui et al, 2001;Nagasaka et al, 2003;Chawla et al, 2004). However, the major shortcoming in existing experimental and computational studies is that they do not account for active muscle forces.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis of Muscle Parameters and Identification of Effective Muscles in Low Speed Lateral Impact at Just Below the Knee

Soni¹,

Chawla²,

Mukherjee³

et al. 2009

SAE Technical Paper Series

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The Engineering Meetings Board has approved this paper for publication. It has successfully completed SAE's peer review process under the supervision of the session organizer. This process requires a minimum of three (3) reviews by industry experts. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE.

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Experimental Study of a Compliant Bumper System

Cited by 21 publications

References 1 publication

Designing road vehicles for pedestrian protection

Designing road vehicles for pedestrian protection

A bumper model with dynamic contact stiffness for simulations of pedestrian legform impacts

Sensitivity Analysis of Muscle Parameters and Identification of Effective Muscles in Low Speed Lateral Impact at Just Below the Knee

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