Design of improved energy absorbing pads to reduce occupant injuries in vehicle side impact

2016 ◽  
Vol 71 (1/2/3/4) ◽  
pp. 174 ◽  
Author(s):  
Murat Yıldızhan ◽  
Barış Efendioğlu ◽  
Necmettin Kaya ◽  
N.A. �° ◽  
smail Öztürk ◽  
...  
Keyword(s):  
Side Impact ◽  
Occupant Injuries ◽  
Energy Absorbing

A Numerical Analysis of Pre-Deployment Effect of Side-Impact Airbags in Reducing Occupant Injuries

2013 ◽  
Author(s):  
Yi Yang Tay ◽  
Rasoul Moradi ◽  
Hamid M. Lankarani
Keyword(s):  
Numerical Analysis ◽  
High Speed ◽  
Motor Vehicle ◽  
Side Impact ◽  
Element Analysis ◽  
Vehicle Accidents ◽  
Injury Criteria ◽  
Acceleration Sensors ◽  
Head Injury Criteria ◽  
Occupant Injuries

Side impact collisions represent the second greatest cause of fatality in motor vehicle accidents. Side-impact airbags (SABs), though not mandated by NHTSA, have been installed in recent model year vehicle due to its effectiveness in reducing passengers’ injuries and fatality rates. However, the increase in number of frontal and side airbags installed in modern vehicles has concomitantly led to the rise of airbag related injuries. A typical side-impact mechanical or electronic sensor require much higher sensitivity due to the limited crush zones making SABs deployment more lethal to out-of-position passengers and children. Appropriate pre-crash sensing needs to be utilized in order to properly restraint passengers and reduce passengers’ injuries in a vehicle collision. A typical passenger vehicle utilizes sensors to activate airbag deployment when certain crush displacement, velocity and or acceleration threshold are met. In this study, it is assumed that an ideal pre-crash sensing system such as a combination of proximity and velocity and acceleration sensors is used to govern the SAB pre-deployment algorithm. The main focus of this paper is to provide a numerical analysis of the benefit of pre-deploying SAB in lateral crashes in reducing occupant injuries. The effectiveness of SABs at low and high speed side-impact collisions are examined using numerical Anthropomorphic Test Dummy (ATD) model. Finite Element Analysis (FEA) is primarily used to evaluate this concept. Velocities ranging from 33.5mph to 50mph are used in the FEA simulations. The ATD used in this test is the ES-2re 50th percentile side-impact dummy (SID). Crucial injury criteria such as Head Injury Criteria (HIC), Thoracic Trauma Index (TTI), and thorax deflection are computed for the ATD and compared against those from a typical airbag system without pre-crash sensing. It is shown that the pre-deployment of SABs has the potential of reducing airbag parameters such as deployment velocity and rise rate that will directly contribute to reducing airbag related injuries.

Design and Analysis of an Energy Absorbing Restraint System for Light Aircraft Crash-Impact

1974 ◽  
Vol 96 (2) ◽  
pp. 495-502 ◽  
Author(s):  
M. S. Hundal ◽  
R. W. McLay ◽  
L. Folsom
Keyword(s):  
Mathematical Model ◽  
Steel Wire ◽  
Plane Motion ◽  
General Aviation ◽  
Restraint System ◽  
Occupant Restraint System ◽  
Crash Protection ◽  
Occupant Injuries ◽  
Energy Absorbing ◽  
Aircraft Crash

The application of a miniaturized energy absorbing mechanism to a light airplane occupant restraint system is presented. The mechanism absorbs energy through the continuous plastic deformation of a steel wire, closely approximating a constant force energy absorber. The design philosophy and the installation details for the aircraft are presented. A mathematical model is used for determining the occupant response during aircraft crash. The model considers plane motion of the aircraft and the human body, the latter being approximated by five rigid body segments. Occupant displacements and curves for accelerations and restraint forces are presented for a typical survivable light aircraft crash. The experimental results and the mathematical model response suggest that incorporation of the energy absorbing mechanism would produce a significant decrease in occupant injuries and fatalities. A parametric study of the occupant/restraint system is presented. Recommendations are made on steps towards improved crash protection and survival in general aviation.

Energy Absorbing Characteristics of GF/Nylon Tubes

1998 ◽  
Vol 47 (5) ◽  
pp. 458-463
Author(s):  
Hiroyuki KAWADA ◽  
Takeshi HONDA ◽  
Maiko TAKASHIMA ◽  
Hajime SATOH
Keyword(s):  
Energy Absorbing

CP-K 570Y780T

Alloy Digest ◽  
2019 ◽  
Vol 68 (6) ◽  
Keyword(s):  
Tensile Properties ◽  
Heat Treating ◽  
Side Impact ◽  
Complex Phase ◽  
Automotive Components ◽  
Weight Saving ◽  
Very High

Abstract CP-K 570Y780T is one of a family of complex-phase steels, CP-W and CP-K, that offer very high strengths and yield points. They are particularly suitable for weight-saving production of cold-formed, crash-relevant automotive components such as side impact intrusion beams, B-pillar reinforcements,profiles, cross members, body reinforcements, bumper bars, and chassis parts. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on heat treating. Filing Code: SA-848. Producer or source: ThyssenKrupp Steel Europe AG.

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