This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Folded Pelvis-Thorax Side Airbag Modeling with CFD Approach and Implementation in Full Vehicle Crash Analysis
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 28, 2017 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The Pelvis-Thorax Side Air Bag (PTSAB) is a typical restraint countermeasure offered for protection of occupants in the vehicle during side impact tests. Currently, the dynamic performance of PTSAB for occupant injury assessment in side impact is limited to full-vehicle evaluation and sled testing, with limited capability in computer aided engineering (CAE). The widely used CAE method for PTSAB is a flat bag with uniform pressure. The flat PTSAB model with uniform pressure has limitations because of its inability to capture airbag deployment during gap closure which results in reduced accuracy while predicting occupant responses. Hence there is a need to develop CAE capability to enhance the accuracy of prediction of occupant responses to meet performance targets in regulatory and public domain side impact tests.
This paper describes a new CAE methodology for assessment of PTSAB in side impact. This method was developed and validated to component and full-vehicle tests, and was successfully used to guide the design and development of PTSAB. The bag was folded using simulation folding developed by LSTC. A particle method (Computational Fluid Dynamics) in LS-DYNA® was used to deploy the PTSAB. The PTSAB model was correlated at a component level using linear impact test, and force-deflection plots of the CAE model were matched with that of the test. The PTSAB model was then implemented in a full vehicle simulation. The key factors that play a role in correlating the model and its ability to predict the test results are discussed in this paper.
|An External Explosive Airbag Model for an Innovative Inflatable Bumper (I-bumper) Concept
|Simplified Side Impact FE Model - SSM
|Development of CAE-Based Crash Sensing Algorithm and System Calibration
CitationJadhav, N., Zhao, L., Mahadevan, S., Sherwood, B. et al., "Folded Pelvis-Thorax Side Airbag Modeling with CFD Approach and Implementation in Full Vehicle Crash Analysis," SAE Technical Paper 2017-01-1460, 2017, https://doi.org/10.4271/2017-01-1460.
Data Sets - Support Documents
|Unnamed Dataset 1
|Unnamed Dataset 2
|Unnamed Dataset 3
- Teng , H. , Wang , J. , Bhalsod , D. The Recent Progress and Potential Applications of Corpuscular Method in LS-DYNA 2010 11 th International LS-DYNA Users Conference
- Lian , W. , Bhalsod , D. , Olovsson , L. Benchmark Study on the AIRBAG_PARTICLE Method for Out-Of-Position Applications 2008 10 th International LS-DYNA Users Conference
- Feng , B. , Coleman , D. Gas Dynamic Simulation of Curtain Airbag Deployment through Interior Trims 2008 10th International LS-DYNA Users Conference
- Sutterfield , A. , Pecoraro , K. , Rouhana , S. , Xu , L. , Abramczyk , J. , Berliner , J. , Irwin , A. , Jensen , J. , Mertz , H. , Nusholtz , G. , Pietsch , H. , Scherer , R. , Tylko , S. Evaluation of the ES-2re Dummy in Biofidelity, Component and Full Vehicle Crash Tests 2005 Stapp Car Crash Journal 49
- 49 CFR 571.214 - Standard No. 214; Side impact protection https://www.nhtsa.gov/sites/nhtsa.dot.gov/files/fmvss/214_Side_Impact_final_Aug_30_2007.pdf
- IIHS Side Impact Crashworthiness Evaluation Crash Test Protocol http://www.iihs.org/iihs/ratings/technical-information/technical-protocols
- ES-2re Finite Element Dummy Manual http://www.humaneticsatd.com/crash-test-dummies/side-impact/es-2re