scholarly journals Crashworthiness of Traffic Light Steel Poles in Vehicle Collisions

2021 ◽  
Author(s):  
Preveen Kumar Siriya
Keyword(s):  
Field Testing ◽  
Element Model ◽  
Side Impact ◽  
Product Development Process ◽  
Efficient Design ◽  
Traffic Light ◽  
Simulation Tools ◽  
Vehicle Occupant ◽  
Vehicle Impact ◽  
Impact Side

Vehicle crashworthiness focuses on the capability of a vehicle to protect its occupants in a collision. The Canadian Highway Bridge Design Code [2] does not provide design criteria for vehicle occupant safety except by field testing. The test-guided product development process is very costly and time-consuming. As an alternative, computer simulation tools are increasingly being used. The aim of this research is to contribute to the efficient design of traffic light poles by developing an experimentally calibrated, computer-based, finite-element model using LSDYNA [54], capable of predicting accurately their response when subjected to vehicle impact. The case of steel pole embedded directly in soil was proved to be strong enough to offer protection under service loading and vehicle impact. Side impact crashed proved to be more severe for the vehicle occupant as a result of the weak structural performance of the side doors of the vehicle. Based on this an innovative pole supported on a hard rubber base is introduced to improve crashworthiness.

scholarly journals Crashworthiness of Traffic Light Steel Poles in Vehicle Collisions

2021 ◽  
Author(s):  
Preveen Kumar Siriya
Keyword(s):  
Field Testing ◽  
Element Model ◽  
Side Impact ◽  
Product Development Process ◽  
Efficient Design ◽  
Traffic Light ◽  
Simulation Tools ◽  
Vehicle Occupant ◽  
Vehicle Impact ◽  
Impact Side

Vehicle crashworthiness focuses on the capability of a vehicle to protect its occupants in a collision. The Canadian Highway Bridge Design Code [2] does not provide design criteria for vehicle occupant safety except by field testing. The test-guided product development process is very costly and time-consuming. As an alternative, computer simulation tools are increasingly being used. The aim of this research is to contribute to the efficient design of traffic light poles by developing an experimentally calibrated, computer-based, finite-element model using LSDYNA [54], capable of predicting accurately their response when subjected to vehicle impact. The case of steel pole embedded directly in soil was proved to be strong enough to offer protection under service loading and vehicle impact. Side impact crashed proved to be more severe for the vehicle occupant as a result of the weak structural performance of the side doors of the vehicle. Based on this an innovative pole supported on a hard rubber base is introduced to improve crashworthiness.

Efficient design and optimization of MEMS by integrating commercial simulation tools

1998 ◽  
Vol 66 (1-3) ◽  
pp. 15-20 ◽  
Author(s):  
Oliver Nagler ◽  
Michael Trost ◽  
Bernd Hillerich ◽  
Frank Kozlowski
Keyword(s):  
Efficient Design ◽  
Design And Optimization ◽  
Simulation Tools

scholarly journals Voltage Sources in 2D Fourier-Based Analytical Models of Electric Machines

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Bert Hannon ◽  
Peter Sergeant ◽  
Luc Dupré
Keyword(s):  
Finite Element ◽  
Great Majority ◽  
Element Model ◽  
Electric Machines ◽  
Analytical Models ◽  
Voltage Source ◽  
Pulse Width Modulated ◽  
Simulation Tools ◽  
Drive Trains ◽  
Terminal Voltage

The importance of extensive optimizations during the design of electric machines entails a need for fast and accurate simulation tools. For that reason, Fourier-based analytical models have gained a lot of popularity. The problem, however, is that these models typically require a current density as input. This is in contrast with the fact that the great majority of modern drive trains are powered with the help of a pulse-width modulated voltage-source inverter. To overcome that mismatch, this paper presents a coupling of classical Fourier-based models with the equation for the terminal voltage of an electric machine, a technique that is well known in finite-element modeling but has not yet been translated to Fourier-based analytical models. Both a very general discussion of the technique and a specific example are discussed. The presented work is validated with the help of a finite-element model. A very good accuracy is obtained.

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.

Analysis of All Terrain Vehicle (ATV) for Impact Loading and Roll over Considering the Safety of Occupants

2012 ◽  
Vol 232 ◽  
pp. 878-881 ◽  
Author(s):  
C.D. Naiju ◽  
K. Annamalai ◽  
Babu Bevin ◽  
Prakash Nikhil
Keyword(s):  
Impact Loading ◽  
Side Impact ◽  
Frontal Impact ◽  
Compact Structure ◽  
Engineering Research ◽  
Impact Side ◽  
Present World

All-terrain vehicles (ATV) are achieving wider response and significance in the present world. With their characteristic abilities of getting through any terrain along with their simple and compact structure, they rule the off-roading world. A new field of engineering research has been developed because of the increasing number of ATV accidents. For determining the reasons to how so many crashes occurs and how they can be prevented, a series of ATV tests were conducted. The tests included simulating an ATV for frontal impact, side impact and rolling over with added weight of a passenger, and due to a thrust effect. Through testing, the amount of weight needed to flip an ATV was determined. This paper highlights the ways to analyse the safety of its chassis in case of impacts or roll overs.

Crash Analysis of Bus Body Structure using Finite Element Analysis

2020 ◽  
Vol 12 (3) ◽  
Author(s):  
Vikas Radhakrishna Deulgaonkar ◽  
M.S. Kulkarni ◽  
S.S. Khedkar ◽  
S.U. Kharosekar ◽  
V.U. Sadavarte
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Side Impact ◽  
Crash Analysis ◽  
Element Analysis ◽  
Industry Standards ◽  
Bus Body ◽  
Impact Side ◽  
Front Impact ◽  
Deformation Patterns

Crash analysis of non-air-conditioned sleeper bus has been carried in present work. Using relevant automotive industry standards (052 and 119) bus dimensions are considered for design. Surface modeling technique is used to prepare computer aided model. Further the bus design is freeze using finite element analysis for different crash conditions as front impact, side impact and rear impact. Crash analysis of the proposed bus design is carried using Ansys Workbench. Using the outcomes from finite element analysis as stresses, deflections, internal and kinetic energies during various crash conditions are estimated. Mesh generator is used to mesh the complex bus model. The stress and deflection magnitudes of proposed bus model are in good agreement with the experimental results available in literature. Design improvements are made using the finite element analysis outcomes, observing the deformation patterns additional pillar members of suitable length are added to increase the dynamic crush and further enhance occupant safety during collisions.

Establishment Method of the Simplified Model for Research on the Crashworthiness of B-Pillar in Side Impact

2014 ◽  
Vol 635-637 ◽  
pp. 502-506 ◽  
Author(s):  
Wei Min Zhuang ◽  
Qin Hua Xu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
High Accuracy ◽  
Side Impact ◽  
Simplified Model ◽  
Body Parts ◽  
Establishment Method ◽  
Short Time ◽  
The Relationship

In order to improve the efficiency of the calculation of the whole car side impact finite element model,simplified model often used in research of B-pillar in passenger car. It is critical to establish a high accuracy simplified model in a short time. The relationship between the energy absorption of body parts and the calculation accuracy of simplified model was analyzed,and the result can be used as a guide for the establishment of simplified model.

scholarly journals Analysis of a Lightweight Aluminum Vehicle Chassis in a Simulation-Based Design Approach

2020 ◽  
pp. 1-10
Author(s):  
Mohsen Alardhi ◽  
Fahad Almaskari ◽  
Melad Fahed ◽  
Jasem Alrajhi
Keyword(s):  
Safety Factor ◽  
Side Impact ◽  
Design Approach ◽  
Element Analysis ◽  
Trade Offs ◽  
Simulation Based Design ◽  
Simulation Based ◽  
Impact Side ◽  
Von Mises ◽  
Vehicle Chassis

This study investigates different chassis designs through a simulation-based design approach. The inherent aluminum ductility and softness could make chassis a daunting modification if not analyzed properly. Structural finite element analysis is comprehensively performed on a vehicle chassis for static loading cases up to 1G in equivalent acceleration. The analysis of the vehicle chassis of both A36 steel and 6061 aluminum for the scenarios of bump, front impact, side impact and a rollover. The von Mises stresses and displacement results showed that the steel chassis possessed higher safety factor in all load cases. The safety factors for an aluminum clone of the steel chassis in some load cases are below 1.0, hence indicating that the failure criterion has been triggered and failure would occur under the 1G load. The original aluminum chassis deformation is far more severe than steel reaching as high as 9.88 mm for the bump loading. A modified aluminum chassis is proposed, by optimizing the wall thickness of the rectangular bars. The slight increase in weight resulted in overcoming the deficiency of aluminum in load carrying capacity. An evaluation matrix procedure is implemented to analyze the trade offs between cost, weight and safety factor for the three chassis materials.

Sign in / Sign up

Export Citation Format

Share Document