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Evaluation of the DyMESH Wheel Impact Model

The HVE White Paper section of the EDC website Library contains numerous examples of real-world crash reconstructions and research studies performed by HVE users from around the world. Each paper highlights the application of HVE-compatible physics programs to investigate factors that may cause or contribute to a crash.

In the presentation below from the 2013 HVE Forum, the performance of SIMON's wheel impact model is evaulated by comparison of simulation results with both data from onboard instrumentation as well as visual behaviors captured in high-speed video.


HVE-WP-2013-5
Evaluation of DyMESH Wheel Impact in a Rollover Collision
Eric Deyerl, P.E. and Mu-Hua Cheng -- Dial Engineering
Louis Cheng, Ph.D. -- Applied BioMechanics

ABSTRACT:

An evaluation of the performance of the wheel impact model within SIMON/DyMESH by simulating a rollover crash test involving significant interaction between the wheel of the bullet vehicle and the body of the target vehicle. The rollover crash test used in this evaluation was conducted by W. R. Haight at the 2012 ARC-CSI Crash Conference and involved a 2011 Jeep Grand Cherokee SUV that was induced to roll over by driving up and over a 1987 Bertone (Fiat) X1/9 sports car.



Photos of the Jeep Grand Cherokee and the Fiat X1/9 Involved in the 2012 ARC-CSI Crash Test


Photo from the Fiat showing the Offset Frontal Impact Test Configuration Set-up

In the summary section of the presentation, it is clearly identifed that in this initial comparison study, the DyMESH wheel impact model functioned to properly alter the path of the bullet vehicle as it overran the body of the target vehicle. Additionally, while the proper simulation of the entirety of the rollover event was not a focus of this study, the bullet vehicle's behavior was adequately modeled from impact through separation from the target vehicle.


SIMON-DyMESH Simulation at Time = 0.01 seconds vs. 2012 ARC-CSI Crash Test


SIMON-DyMESH Simulation at Time = 0.11 seconds vs. 2012 ARC-CSI Crash Test


SIMON-DyMESH Simulation at Time = 0.51 seconds vs. 2012 ARC-CSI Crash Test


SIMON-DyMESH Simulation at Time = 0.88 seconds vs. 2012 ARC-CSI Crash Test

To download this publication, visit the HVE White Paper section of the EDC website Library or just click on the images above. For more information about using HVE and SIMON-DyMESH for your crash investigations, please contact EDC at 888.768.6216.


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