Evaluation of Occupant Head Injury During Automotive Interior Head Impact As Per FMVSS201U Regulations using Fea Approach
Amruth C H
, Sudheer Kumar.B N , Harsha G O
FMVSS201U, SUV, pattern, LS-DYNA, B-Pillar, Hypermesh
A significant fraction of fatalities involving passengers in Automobile accidents is due to severe Head Injury. These injuries occur when an occupants head is struck against the interior of vehicle during crashes. Head impact safety which in turn is the occupant safety is a significant consideration particularly in the design of Passenger Vehicles. Sports Utility Vehicles (SUVs) have a greater tendency to rollover when compared to other Passenger Vehicles as they have higher center of gravity. During the rollover of SUV the head comes in contact with the parts such as the B-Pillar so in order to evaluate the occupant safety during rollover National Highway Traffic Safety Administration has set Federal Motor Vehicle Safety Standard 201Upper (FMVSS201U). The regulation FMVSS201U emphasizes on the design and testing methodology of the occupant injury levels during interior impact scenario. As per the requirements the Finite element model of the SUV is generated. The Free motion Head Form is positioned at the pre-identified target locations on the B-Pillar as per the standard requirements. The pre-identified target points on the B-Pillar are BP1, BP2 and BP3. The Free Motion Head Form is made to hit the target location at 15 mph initial velocity and the Head Injury Criteria HIC (d) which is a non-parametric number indicating the head injury levels is identified. HIC (d) number higher than 1000 is critical for the survival of the occupant and calls for the re-design of the B-Pillar. The FEA tool Hypermesh is used for the pre-processing ie; model preparation and load case setup. LS-DYNA 3D, a non-linear dynamic solver is used for solving. Hyper view is used as post-processor to derive the HIC (d) values from the analysis. The evaluation of HIC (d) for various grades of steel such as SAE 340S, SAE 280A, SAE 250A and SAE 180A for B-Pillar has been carried out. SAE 180A grade of steel is preferred for B-Pillar as it provides HIC (d) value lower than other grades of steel and also HIC (d) value is less than 700 which is the requirement of Original Equipment Manufacturers (OEM’s).
"Evaluation of Occupant Head Injury During Automotive Interior Head Impact As Per FMVSS201U Regulations using Fea Approach", IJSDR - International Journal of Scientific Development and Research (www.IJSDR.org), ISSN:2455-2631, Vol.3, Issue 7, page no.279 - 284, July-2018, Available :https://ijsdr.org/papers/IJSDR1807048.pdf
Volume 3
Issue 7,
July-2018
Pages : 279 - 284
Paper Reg. ID: IJSDR_180536
Published Paper Id: IJSDR1807048
Downloads: 000346998
Research Area: Engineering
Country: Mangalore, Karnataka, India
ISSN: 2455-2631 | IMPACT FACTOR: 9.15 Calculated By Google Scholar | ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 9.15 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator
Publisher: IJSDR(IJ Publication) Janvi Wave
