Deflection Corridors of Abdomen and Thorax in Oblique Side Impacts Using Equal Stress Equal Velocity Approach: Comparison With Other Normalization Methods

2014 ◽  
Vol 136 (10) ◽  
Author(s):  
Narayan Yoganandan ◽  
Mike W. J. Arun ◽  
John Humm ◽  
Frank A. Pintar
Keyword(s):  
Finite Element ◽  
Standard Deviation ◽  
Human Body ◽  
Side Impact ◽  
Finite Element Models ◽  
Specific Load ◽  
Side Impacts ◽  
Normalization Methods

The first objective of the study was to determine the thorax and abdomen deflection time corridors using the equal stress equal velocity approach from oblique side impact sled tests with postmortem human surrogates fitted with chestbands. The second purpose of the study was to generate deflection time corridors using impulse momentum methods and determine which of these methods best suits the data. An anthropometry-specific load wall was used. Individual surrogate responses were normalized to standard midsize male anthropometry. Corridors from the equal stress equal velocity approach were very similar to those from impulse momentum methods, thus either method can be used for this data. Present mean and plus/minus one standard deviation abdomen and thorax deflection time corridors can be used to evaluate dummies and validate complex human body finite element models.

Math-Based Performance Evaluation of an Experimental Car: Side Impact Protection

2002 ◽  
Author(s):  
Yih-Charng Deng ◽  
Chin-Hsu Lin ◽  
J. T. Wang
Keyword(s):  
Finite Element ◽  
Performance Evaluation ◽  
Side Impact ◽  
Finite Element Models ◽  
Occupant Protection ◽  
Potential Benefits ◽  
Impact Protection

This study used finite element models to assess potential benefits of selected unconventional features implemented in this study for occupant protection in side impact. These features include door lockdown, gullwing door with a corrugated aluminum panel and cross-car beams. The intrusion and intrusion velocity of the B-pillar were used as the parameters for measuring side impact protection performance. No attempt was made here to assess manufacturablity, design feasibility, mass implications or market interest.

DEVELOPMENT AND BIOFIDELITY EVALUATION OF AN OCCUPANT BIOMECHANICAL MODEL OF A CHINESE 50TH PERCENTILE MALE FOR SIDE IMPACT

2017 ◽  
Vol 17 (07) ◽  
pp. 1740039 ◽  
Author(s):  
ZHENGWEI MA ◽  
LELE JING ◽  
FENGCHONG LAN ◽  
JINLUN WANG ◽  
JIQING CHEN
Keyword(s):  
Finite Element ◽  
Human Body ◽  
Computational Models ◽  
Rating Scale ◽  
Element Model ◽  
Side Impact ◽  
Body Parts ◽  
Lateral Impact ◽  
Human Body Model ◽  
Body Model

Finite element modeling has played a significant role in the study of human body biomechanical responses and injury mechanisms during vehicle impacts. However, there are very few reports on similar studies conducted in China for the Chinese population. In this study, a high-precision human body finite element model of the Chinese 50th percentile male was developed. The anatomical structures and mechanical characteristics of real human body were replicated as precise as possible. In order to analyze the model’s biofidelity in side-impact injury prediction, a global technical standard, ISO/TR 9790, was used that specifically assesses the lateral impact biofidelity of anthropomorphic test devices (ATDs) and computational models. A series of model simulations, focusing on different body parts, were carried out against the tests outlined in ISO/TR 9790. Then, the biofidelity ratings of the full human body model and different body parts were evaluated using the ISO/TR 9790 rating method. In a 0–10 rating scale, the resulting rating for the full human body model developed is 8.57, which means a good biofidelity. As to different body parts, the biofidelity ratings of the head and shoulder are excellent, while those of the neck, thorax, abdomen and pelvis are good. The resulting ratings indicate that the human body model developed in this study is capable of investigating the side-impact responses of and injuries to occupants’ different body parts. In addition, the rating of the model was compared with those of the other human body finite element models and several side-impact dummy models. This allows us to assess the robustness of our model and to identify necessary improvements.

Energy-Based Crashworthiness Optimization for Multiple Vehicle Impacts

2004 ◽  
Author(s):  
H. Fang ◽  
K. Solanki ◽  
M. F. Horstemeyer
Keyword(s):  
Finite Element ◽  
Energy Absorption ◽  
Absorption Capacity ◽  
Full Scale ◽  
Side Impact ◽  
Frontal Impact ◽  
Vehicle Model ◽  
Energy Absorption Capacity ◽  
Side Impacts ◽  
Design Variables

In this paper, we use a full-scale finite element vehicle model of a 1996 Dodge Neon in simulating two types of vehicle crashes, offset-frontal and side impacts. Based on an analysis of the vehicle’s histories of internal energy absorption under both impacts, we select twenty components as design variables in the optimization of the vehicle’s weight without decreasing the vehicle’s energy absorption capacity and energy absorption rate. We use the second-order polynomials in creating the metamodels for the response functions of energy absorption under both impacts. The optimization result shows a significant reduction on the total weight of the selected components. The LS-DYNA MPP v970 and a full-scale finite element vehicle model of 320,872 nodes and 577,524 elements are used in the simulations. A simulation of 100 ms offset-frontal impact takes approximately 17 hours with 36 processors on the IBM Linux SuperCluster, which has a total of 1038 Intel Pentium III 1.266 GHz processors and 607.5 GB RAM. A simulation of 100 ms side impact takes approximately 29 hours with the same condition as the offset-frontal simulation.

Development and validation of side-impact crash and sled testing finite-element models

2007 ◽  
Vol 45 (10) ◽  
pp. 925-937 ◽  
Author(s):  
Tso-Liang Teng ◽  
Kuan-Chun Chang ◽  
Chien-Hsun Wu
Keyword(s):  
Finite Element ◽  
Side Impact ◽  
Finite Element Models ◽  
Development And Validation
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