Biofidelic dummy simulates crash victims
An
ESI Group product story
Edited by the Engineeringtalk editorial team
Sep 27, 2007
The BioRID-II biofidelic dummy for Pam-Crash/Pam-Safe 2G helps designers to minimise the whiplash injuries which can occur during a rear crash.
ESI Group has released Version 2.0 of its BioRID-II biofidelic dummy for Pam-Crash/Pam-Safe 2G.
Using BioRID-II with Pam-Crash/Pam-Safe 2G makes it possible to accurately simulate the acceleration, force and kinematics of a car occupant in order to minimise the whiplash injuries which can occur during a rear crash.
"This finite element (FE) dummy model brings a leading-edge advantage to the design and optimisation of car seats so as to improve protection from whiplash injuries and, therefore, meet the challenge of the sixth star at EuroNCAP".
"By using BioRID-II dummies, car manufacturers can enhance seats' frame structure so that they absorb more energy and reduce rebound effects, which is decisive in ensuring the safety of car occupants during a crash", says Peter Ullrich, Crash Safety and Impact Product Manager at ESI group.
This first industrial version of the latest BioRID-II dummy has an articulated thoracic/lumbar spine similar to a human spine (24 vertebrae).
The neck is maintained under pretension load via a muscle substitute, which consists of a single damper mounted in parallel with a flexor and an extensor spring.
The abdomen is filled with a water cavity and the torso texture is soft silicon rubber.
The BioRID-II dummy model was validated on a series of component tests over the torso, head, neck and spine assemblies and on sled tests.
The sled tests were performed for three representative pulses on a test device with a deformable back rest calibrated so as to reproduce the behaviour of typical car seats.
Whiplash hurls the head violently backwards (hyperextension) and forwards (hyperflexion).
The injury is even worse when the neck is turned to the side at the time of the accident.
Whiplash is the most common cause of injuries in car crashes.
One in every seven whiplash victims will still suffer significant pain more than three years after the original accident.
These kind of injuries are associated with serious medical consequences (damage to intervertebral joints, discs and ligaments, cervical muscles and nerves) as well as significant costs to society.
Claims resulting from whiplash injuries amount to Eur 500 million each year in Germany alone.
Reducing these numbers is a challenge for all engineers involved in improving the safety of car passengers.
This FE model was developed by a FAT (German Association for Automotive Research) project in co-operation with German car manufacturers, seat manufacturers, and Denton COE, the manufacturer of the hardware dummy.
Pam-Crash 2G, the virtual testing solution for crash and safety professionals, comprises three main components.
Firstly, a solver offers physics-based models for crash and other impact problems.
Its key capabilities include advanced material models, coupling with manufacturing process simulation, a mesh-free CFD method for airbag modelling, and a highly scalable parallel solution.
Secondly, the Visual Environment portfolio is a suite of highly productive CAE process automation products.
Finally, there are validated compute models, including crash test dummies, impactors, barriers, and a family of human body models.
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Contact ESI Group
Tel +33 141 73 58 00
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