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TECHNICAL PAPER

Integration of Scientific Visualization With Physical and Digital Modeling for Improved Child Restraint System Safety

[+] Author and Article Information
Kevin F. Hulme

New York State Center for Engineering Design and Industrial Innovation, University at Buffalo, 5 Norton Hall, Buffalo, NY 14260-1810hulme@buffalo.edu

Abani Patra

Department of Mechanical and Aerospace Engineering, University at Buffalo, 605 Furnas Hall, Buffalo, NY 14260-4400abani@eng.buffalo.edu

Nataraju Vusirikala

 General Motors India, 1-8, 3rd Floor, Creator Building, International Tech Park, Bangalore–560066, Indianataraju.vusirikala@gm.com

Robert A. Galganski

 Calspan Corporation, 4455 Genesee Street, Buffalo, NY 14225robert.galganski@calspan.com

Ioannis Hatziprokopiou

 General Dynamics, 4455 Genesee Street, Buffalo, NY 14225ioannis.hatziprokopiou@gd-ais.com

CenTIR participants in this particular study were drawn from Calspan Corporation, General Dynamics Advanced Information Engineering Services, Calspan-University at Buffalo Research Center (CUBRC), Applied Computational Mathematics and Mechanics Research Group (ACM2E), and the New York State Center for Engineering Design and Industrial Innovation (NYSCEDII) at the University at Buffalo.

MADYMO ’s conventional belt is a massless, uniaxial element that does not exhibit bending or torsional stiffness. In a systems context, it can be thought of as a spring connected in parallel to a damper. Spring and damper forces are calculated at the belt attachment points.

J. Comput. Inf. Sci. Eng 7(2), 174-181 (Feb 12, 2006) (8 pages) doi:10.1115/1.2720881 History: Received August 03, 2005; Revised February 12, 2006

Computational modeling continues to play an increasingly significant role in the design of more effective vehicle crash safety systems. Researchers now frequently exercise models formulated with sophisticated computer analyses to supplement empirically generated results and conduct extensive what-if exploratory studies for information formerly available solely from costly and time-consuming physical testing. Our research team is developing a modeling and analysis capability that features a scientific visualization toolkit called NYSCEDII CRS visualization module (NCVM). NCVM post-processes conventional crash simulation imagery, enabling modelers to visualize aspects of both the digital model and the sled-test simulation in an immersive visual environment. This paper describes NCVM’s design and development in detail and illustrates its application to a series of sled tests conducted with a recent-production child restraint system and dummy occupant.

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Copyright © 2007 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Baseline CRS visualization

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Figure 2

Stress contouring

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Figure 3

Acceleration plotting

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Figure 4

CRS with vehicle (interior) model

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Figure 5

(a) Slicing off and (b) slicing on

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Figure 6

(a) Vapor trails (frame 20∕67) and (b) vapor trails (frame 67∕67)

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Figure 7

Visual validation of models: (a) sled test, half-way through forward excursion, (b) sled test, maximum forward displacement, (c) sled test, rebound excursion, (d) NCVM, half-way through forward excursion, (e) NCVM, maximum forward displacement, and (f) NCVM, rebound excursion

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Figure 8

(a) Fine- and (b) coarse-mesh finite element CRS shell models (17,150 and 2850 finite elements, respectively)

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Figure 9

MADYMO composite CRS/dummy model

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Figure 10

Pretest—south side of CRS

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