Impact Simulation of Hydro-formed Front End Vehicle Structure

Development of Mathematical Models for Evaluating Child Occupant Impact Dynamics and Intrusions of the Vehicle Structure

Volume 17: Transportation Systems ◽

10.1115/imece2008-67169 ◽

2008 ◽

Author(s):

Ahmed M. Elmarakbi

Keyword(s):

Dynamic Response ◽

Mathematical Models ◽

Seat Belt ◽

Vehicle Body ◽

Design Stage ◽

Injury Criteria ◽

Front End ◽

Vehicle Structure ◽

Lumped Masses ◽

Child Occupant

Two mathematical models are developed and analyzed in this paper to predict the dynamic response in vehicle crashes. The first model is developed to capture the front-end intrusion of the vehicle structure in frontal collision. The second model is proposed to define the interaction between the child occupant and vehicle passenger compartment and to predict the acceleration injuries during a sudden impulse load. In these mathematical models, the bumper and vehicle body are defined by lumped masses and longitudinal rails of the front-end structure are defined by plastic springs. Moreover, the child occupants are considered as lumped masses, connected to the child seat and vehicle body masses by means of restraint systems. The occupant restraint characteristics of seat belt are represented by stiffness and damping elements. To obtain the dynamic response of the occupant, the equations of motion of the vehicle impact system in both full and offset scenarios are developed and analytically solved using Incremental Harmonic Balance Method (IHBM). The injury criteria, child’s acceleration and vehicle’s font-end deformation, are used to interpret the results. It is demonstrated from the simulations that the dynamic response and injury criteria are easily captured and analyzed. It is also shown that the mathematical models are flexible, useful in optimization studies and it can be used at initial design stage.

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Digital Front-End in Wireless Communication and Broadcasting

10.1017/cbo9780511744839 ◽

2011 ◽

Cited By ~ 35

Keyword(s):

Wireless Communication ◽

Front End

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Integration of Passive RF Front End Components in SoCs

10.1017/cbo9781139030724 ◽

2009 ◽

Cited By ~ 6

Author(s):

Hooman Darabi ◽

Ahmad Mirzaei

Keyword(s):

Front End ◽

Rf Front End

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Low-voltage BIMOS AM front-end amplifier

IEE Proceedings G Circuits Devices and Systems ◽

10.1049/ip-g-2.1990.0012 ◽

1990 ◽

Vol 137 (1) ◽

pp. 57 ◽

Cited By ~ 2

Author(s):

M. Steyaert ◽

Z. Chang

Keyword(s):

Low Voltage ◽

Front End

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Becoming the Nuclear-Front-End

PROKLA Zeitschrift für kritische Sozialwissenschaft ◽

10.32387/prokla.v47i189.59 ◽

2017 ◽

Vol 47 (189) ◽

Author(s):

Patrick Schukalla

Keyword(s):

Nuclear Reactor ◽

Chemical Elements ◽

High Technology ◽

Power Production ◽

Uranium Mining ◽

Nuclear Industry ◽

Current State ◽

Front End ◽

Production And Consumption ◽

Uranium Exploration

Uranium mining often escapes the attention of debates around the nuclear industries. The chemical elements’ representations are focused on the nuclear reactor. The article explores what I refer to as becoming the nuclear front – the uranium mining frontier’s expansion to Tanzania, its historical entanglements and current state. The geographies of the nuclear industries parallel dominant patterns and the unevenness of the global divisions of labour, resource production and consumption. Clearly related to the developments and expectations in the field of atomic power production, uranium exploration and the gathering of geological knowledge on resource potentiality remains a peripheral realm of the technopolitical perceptions of the nuclear fuel chain. Seen as less spectacular and less associated with high-technology than the better-known elements of the nuclear industry the article thus aims to shine light on the processes that pre-figure uranium mining by looking at the example of Tanzania.

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Análisis de la aplicación de pruebas funcionales y pruebas de usabilidad de software en el desarrollo de sistemas web

Ciencia Digital ◽

10.33262/cienciadigital.v3i3.4..845 ◽

2019 ◽

Vol 3 (3.4.) ◽

pp. 180-190

Author(s):

Natalia Patricia Layedra Larrea ◽

Marco Vinicio Ramos Valencia ◽

Blanca Faustina Hidalgo Ponce ◽

Angela Elizabeth Samaniego Orozco

Keyword(s):

Front End ◽

El Sistema

El objetivo general del presente trabajo es analizar la aplicación de pruebas funcionales y pruebas de usabilidad en sistemas web. Para aplicar dichas pruebas se desarrolló un sistema web para la gestión de reuniones eclesiásticas para la Iglesia Bíblica Riobamba. El sistema fue desarrollado utilizando la metodología de desarrollo SCRUM, que permitió realizar un análisis de los requerimientos levantados tanto en prioridad de desarrollo como en el tiempo en que se realiza cada uno; además, se utilizó la tecnología AngularJS para el front end, mientras que para el back end se trabajó con el lenguaje de programación JAVA en el entorno de desarrollo Netbeans 8.2, y servicios RestFULL que permiten la conexión entre el front end y el back end. Finalmente, para la gestión de la base de datos se utilizó PostgreSQL. Sobre el sistema se han ejecutado pruebas de funcionamiento y usabilidad. Para obtener los resultados de la usabilidad del sistema se aplicó una encuesta de usabilidad a un grupo de 20 usuarios con distintos roles dentro del sistema, de los cuales el 90.14% manifestaron que pudieron usarlo fácilmente. Las pruebas de funcionamiento se aplicaron en el módulo de autenticación de usuarios, considerando que existen varios roles. Como resultado de las pruebas de funcionamiento se obtuvo un funcionamiento adecuado del módulo, en base a lo esperado por los usuarios.

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