Computational Method of the Stiffness Coefficients A and B in the Case of Frontal Impact from the Results of the Crash Tests

2021 ◽  
Author(s):  
Badr Ait Syad ◽  
Elmehdi Salmani ◽  
Hamid Ez-Zahraouy ◽  
Abedlilah Benyoussef
Keyword(s):  
Computational Method ◽  
Frontal Impact ◽  
Stiffness Coefficients ◽  
Crash Tests

Analysis of Lower Leg Injury of Occupant in Frontal Crash Tests Based on China NCAP Protocol

2011 ◽  
Vol 279 ◽  
pp. 400-405
Author(s):  
Zhi Xin Liu ◽  
Ren Jun Wan ◽  
Yong Wan Shi
Keyword(s):  
Test Data ◽  
Lower Leg ◽  
Lower Limbs ◽  
Vehicle Safety ◽  
Upper Limbs ◽  
Frontal Impact ◽  
Passenger Vehicle ◽  
Characteristic Parameters ◽  
Frontal Crash ◽  
Crash Tests

With the popularization of passenger vehicle safety devices such as safety belt, airbag and so on, the chance that occupant’s upper limbs were injured seriously was decreased significantly in frontal impact. However, the injury of occupant’s lower limbs became more and more severe, especially on lower leg injury. 37 groups of test data of China NCAP crash tests including full-frontal rigid crash and 40% offset deformable barrier crash were investigated in this paper, and lower leg injury distributing characteristic of drivers and passengers in these two kinds of crash configurations were obtained. Finally the effect rules of characteristic parameters on lower leg injury were summarized.

A Theoretical Study of Submarining Tendency of a Hybrid III 5th Percentile Female Dummy

2009 ◽  
Author(s):  
Liang Tang ◽  
Qing Zhou
Keyword(s):  
Finite Element ◽  
Theoretical Study ◽  
Nonlinear Finite Element ◽  
Finite Element Models ◽  
Frontal Impact ◽  
The Third ◽  
Kinematic Relationship ◽  
Hybrid Iii ◽  
Crash Tests ◽  
Force Equilibrium

This paper presents a theoretical study on the assessment of submarining tendency of a Hybrid III 5th percentile female crash dummy in frontal impact crash tests. Three candidate criteria for submarining tendency assessment were presented and examined. The first two criteria were derived based on the kinematic relationship between the lap-belt and the pelvis. The third criterion was derived based on the force equilibrium of the lap-belt and pelvis system. Nonlinear finite element models were used together with the use of a Hybrid III 5th percentile female crash dummy model to evaluate these candidate analysis methods.

scholarly journals CORRELATION ANALYSIS OF VEHICLE FRONTAL IMPACT PARAMETERS

2017 ◽  
Vol 12 ◽  
pp. 74 ◽  
Author(s):  
Josef Mík ◽  
Jana Kadlecová
Keyword(s):  
Correlation Analysis ◽  
Traffic Accident ◽  
Emergency Call ◽  
Vehicle Safety ◽  
Frontal Impact ◽  
Road Vehicle ◽  
Frontal Crash ◽  
Different Types ◽  
The Individual ◽  
Crash Tests

The article considers a possible improvement of road vehicle safety by using eCall – a system which initiates an emergency call in case of traffic accident. A possible way of better description of a frontal impact accident of a vehicle is examined and enriched by the information from the onboard e-call unit. In this article, we analyze results of frontal crash tests with different types of barriers and overlapping area and look for the correlation between the individual vehicle and collision parameters in order to provide a better description of the severity of the accident by the eCall system. The relation among the selected parameters is described using the correlation analysis.

scholarly journals Generalized Deformation and Total Velocity Change Analysis with Missing Vehicle Stiffness Coefficients; G-DaTA ?V™

2015 ◽  
Vol 32 (1) ◽  
Author(s):  
Jerry S. Ogden
Keyword(s):  
Frontal Impact ◽  
Heavy Vehicles ◽  
Change Analysis ◽  
Velocity Change ◽  
Passenger Vehicles ◽  
Stiffness Coefficients ◽  
Light Trucks ◽  
Recreational Vehicles ◽  
Total Velocity

Analysis of vehicle deformation from impacts largely relies upon A and B stiffness coefficients for vehicle structures in order to approximate the velocity change and accelerations produced by an impact. While frontal impact stiffness factors for passenger vehicles, light trucks, vans, and sport utility vehicles are relatively prevalent for modern vehicles, stiffness factors for rear and side structures — as well as heavy vehicles, buses, recreational vehicles, trailers, motorcycles, and even objects — are essentially non-existent.

Modeling and Simulation of Body-on-Frame Vehicles for Frontal Impact Sensing Tests

2006 ◽  
Author(s):  
Chin-Hsu Lin ◽  
J. T. Wang
Keyword(s):  
Development Process ◽  
Motor Vehicle ◽  
The Body ◽  
Sport Utility Vehicle ◽  
Frontal Impact ◽  
Full Vehicle ◽  
Light Trucks ◽  
Modeling Techniques ◽  
Crash Tests ◽  
Utility Vehicle

A capability for modeling and simulating frontal impact tests required by the crash sensing calibration task during the development process of a new motor vehicle is presented. The capability is applicable to the body-on-frame (BOF) vehicles such as light trucks and sport utility vehicles. Critical modeling techniques and guidelines for building a high fidelity frontal impact finite element BOF vehicle model were developed and validated using 15 full vehicle crash tests. The modeling techniques and guidelines can be used to model and simulate a suite of frontal impact sensing tests for BOF vehicles. Such a math-based capability could significantly reduce the development time and cost of a new light truck or sport utility vehicle.

Lower Extremity Mechanism and Responses in Various Frontal Impact Configurations

2017 ◽  
Author(s):  
Saeed Barbat ◽  
Xiaowei Li
Keyword(s):  
Lower Extremity ◽  
Oblique Impact ◽  
Instrument Panel ◽  
Crash Test ◽  
Frontal Impact ◽  
Vehicle Interior ◽  
Rigid Barrier ◽  
Frontal Crash ◽  
Crash Tests ◽  
Small Overlap

An analysis of the lower extremity responses in various frontal impact test configurations was performed. The THOR-LX anthropomorphic test device (ATD) representing a mid-size adult male was used. Four groups of frontal crash test data were analyzed. These groups included: Rigid Fixed Barrier (RFB), Moderate Overlap Offset Deformable Barrier (ODB), Small Overlap Rigid Barrier (SORB), and Oblique Impact (OI) crash tests.. This analysis indicated that the lower extremity responses could be high especially in the oblique impact and small overlap crash tests. This study focused on understanding the causes of the resulting high responses. ATD lower extremity kinematics and interaction with intruded body structure and/or instrument panel varied in the different frontal impact configurations. Therefore, the dominant causes of lower extremity responses in terms of tibia forces and moments were not the same for all frontal crash modes. Maximum Tibia Index results associated with the four groups of frontal impact tests were used to develop a better understanding of ATD kinematics and response mechanisms of the lower extremities. The contact sequence of the lower leg to vehicle interior components was illustrated for OI. This paper investigated the cause of lower extremity responses in these crash tests. Analysis indicated that the time at which maximum intrusion occurs did not necessarily coincide with the time of maximum lower extremity responses expressed by the Tibia Index.

MULTI-LEVEL K-d TREE-BASED DATA-DRIVEN COMPUTATIONAL METHOD FOR THE DYNAMIC ANALYSIS OF MULTI-MATERIAL STRUCTURES

2020 ◽  
Vol 18 (4) ◽  
pp. 421-438
Author(s):  
Zhangcheng Zheng ◽  
Hongfei Ye ◽  
Hongwu Zhang ◽  
Yonggang Zheng ◽  
Zhen Chen
Keyword(s):  
Dynamic Analysis ◽  
Computational Method ◽  
Data Driven ◽  
Multi Level
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