• Title/Summary/Keyword: Car Crash

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Optimal Design for a Structure Using Design of Experiment (실험계획법을 이용한 구조물의 최적설계)

  • 고성호;한석영;최형연
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2001.04a
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    • pp.34-39
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    • 2001
  • The median barrier is one of the roadside hardware to prevent severe human and property damage from highway traffic accidents. The foreign standard of concrete median barrier was introduced and implemented without modification fitting to domestic vehicle and highway condition. In a car accident, median barrier doesn't protect vehicle effectively, especially for heavy vehicle such as bus and heavy truck. The purpose of this study is to develop the optimal performance design of concrete median barrier using the design of experiment with crash simulation analysis which is done by Pam-Crash that is one of the commercial crash simulation software. As a result of this study, an optimal design of concrete median barrier is obtained considering von Mises stress, volume and COG acceleration of truck.

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An Experimental and FEA on Crashworthiness of Rolling Stock (철도차량의 Crashworthiness에 관한 실험 및 해석적 연구)

  • Park, Kyoung-Huan;Lee, Jung-Su;Lee, Jang-Uk;Park, Geun-Su
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.2040-2045
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    • 2008
  • The priority of Crashworthiness concept for rolling stock is progressively increasing to reduce the damage of drivers and passengers as well as the car. For the first step of this research, the analysis of the crash elements have been performed. Also the longitudinal collapse force and mode is important point for whole carbody structure to guarantee the lower force at end part rather than the main passenger area. The carbody quasi-static collapse analysis and real test has been performed in the research. The crash elements FEA and test has been performed as well. After the initial Analysis and test, the correlation analysis between the FEA and test has been performed by FEA tunning. All this result will be used for real crashworthiness design for carbody structure.

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Vehicle Animation Making Tools based on Simulation and Trajectory Library (차량 시뮬레이션과 경로 라이브러리에 기반한 차량 애니메이션 저작도구)

  • Jeong, Jinuk;Kang, Daeun;Kwon, Taesoo
    • Journal of the Korea Computer Graphics Society
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    • v.23 no.5
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    • pp.57-66
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    • 2017
  • In this paper, we suggest a novel physics-based real-time animation technique for vehicles, and introduce an easy and intuitive animation authoring tool which uses our proposed technique. After a user specifies a trajectory of a virtual car as input, our system produces a more accurate simulation faster than a previous research result. This is achieved by a trajectory splitting method based on directional features and a trajectory library. As a result, the user can create not only a car animation including lane changing and passing, but also a crash animation which is a rarely researched topic. Also, we propose a virtual car structure that approximates a real car's structure for real-time simulation, the resulting animation shows high plausibility such as a small vibration which occurs when the virtual car breaks and a deformation of when a car accident happens.

Whiplash Injury Case Studies through Low Speed Rear-end Crash Tests (차대차 추돌사고 재현시험을 통한 경추염좌 상해 위험도 연구)

  • Lim, Namkyoung;Shim, Sangwoo;Jung, Hyuncheol
    • Transactions of the Korean Society of Automotive Engineers
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    • v.24 no.4
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    • pp.432-438
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    • 2016
  • Whiplash injuries in low-speed rear-end collisions are the most common injuries and has been a social issue in insurance industry, such as excessive medical claim costs along with exaggerated injuries of victims and treatments from hospitals. According to the Korea Insurance Development Institute reports, the number of claims by rear-end collision was approximately 703,000, which accounts for 53.6 % of the total car-to-car collisions in 2014. Part of the neck injury claims in the Korea car insurance was approximately 28.3 %. Furthermore, approximately 98.4% of the injured persons in rear-end collisions sustained minor injuries under AIS2. In order to improve this situation as well as find out the severity of neck injuries from rear-end collision, the Korea Automobile Insurance Repair Research and Training Center conducted car-to-car rear-end crash tests that striking vehicles(SUV) collided into different sizes of struck-vehicles(small, middle, and large sedan) at the impact speeds of 8 km/h ~ 16 km/h. In order to analyze the whiplash injury, the BioRID-II was seated in each struck-vehicles, and the neck injury criteria(NIC), head contact time, maximum vehicle accelerations, and mean vehicle accelerations were calculated from values from the accelerations of the dummy and the struck-vehicles.

The Strength Analysis of Passenger Car Seat Frame (승용차 시트프레임의 강도해석)

  • 임종명;장인식
    • Transactions of the Korean Society of Automotive Engineers
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    • v.11 no.6
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    • pp.205-212
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    • 2003
  • This paper may provide a basic design data for the safer car seat mechanism and the quality of the material used by finding out the passenger's dynamic behavior when protected by seat belt during collision. A computer simulation with finite element method is used to accomplish this objective. At first, a detailed geometric model of the seat is constructed using CAD program. The formation of a finite element from a geometric data of the seat is carried out using Hyper-Mesh that is the commercial software for mesh generation and post processing. In addition to seat modeling, the finite element model of seat belt and dummy is formed using the same software. Rear impact analysis is accomplished using Pam-Crash with crash pulse. The part of the recliner and right frame is under big stress in rear crash analysis because the acceleration force is exerted on the back of the seat by dummy. The stress condition of the part of the bracket is checked as well because it is considered as an important variable on the seat design. Front impact model which including dummy and seal belt is analyzed. A Part of anchor buckle of seat frame has high stress distribution because of retraction force due to forward motion of dummy at the moment of collision. On the basis of the analysis result, remodeling and reanalysis works had been repeatedly done until a satisfactory result is obtained.

Crash Analysis of the ULSAB-AVC Model with Considering Forming Effects (박판성형가공을 고려한 자동차 충돌해석)

  • Huh, H.;Yoon, J.H.;Bao, Y.D.;Kim, S.H.;Park, S.H.
    • Transactions of Materials Processing
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    • v.15 no.8 s.89
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    • pp.556-561
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    • 2006
  • Most of auto-body members are composed of stamping parts. These parts have the non-uniform thickness and plastic work hardening distribution during the forming process. This paper is concerned with the side impact analysis of the ULSAB-AVC model according to the US-SINCAP in order to compare the crashworthiness between the model with and without considering the forming effect. The forming effect is ca]ciliated by one-step forming analysis for several members. The crashworthiness is investigated by comparing the deformed shape of the cabin room the energy absorption characteristics and the intrusion velocity of a car. The result of the crash analysis demonstrates that the crash mode, the load-carrying capacity and energy absorption can be affected by the forming effect. It is noted that the design of an autobody should be carried out considering the forming effect for accurate assessment of crashworthiness.

The Safety Assessment of Wheelchair Occupants in Road Passenger Vehicles with the Frontal Crash: a Computer Simulation (시뮬레이션 기법을 이용한 차량내 전동휠체어 탑승자의 전방 충돌시 안전에 관한 연구)

  • Lee, Young-Shin;Lee, Ki-Du;Lim, Hyun Kyoon
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.29 no.11 s.242
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    • pp.1518-1526
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    • 2005
  • With increasing need of transportation services for people with disabilities and the aged, wheelchairs are used as their assistive devices to participate in daily and recreational activities and as seats of motor vehicle. However, as wheelchairs are primarily designed fer mobility assistive devices, not for vehicle seats, wheelchair users may experience serious injury when they meet car crashes. To date, neither engineering guidance for a wheelchair mounting system on the vehicle floor nor safety assessment analysis by a car crash has been studied for the domestic users. In this paper, in accordance with the ANSVRESNA WC-19, a fixed vehicle mounted wheelchair occupant restraint system (FWORS), wheelchair integrated restraint system (WIRS), and wheelchair integrated x-bend restraint system (WIXRS) subjected to frontal impact (20 g, 48 U) were analyzed using compute. simulations for domestic users. We present surrogate wheelchair occupant safety by head injury criteria (HIC), motion criteria (MC), and combined injury criteria (CIC).

Design and implementation of a lifesaving system for handling a car crash and rollover (차량 추락 및 전복 사고 대처를 위한 인명구조 시스템 설계 및 구현)

  • Kim, Chan-goo;Kim, Yong-ju;Moon, Eun-gwang;Lim, A-young;Kwon, Soon-ryang
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2016.10a
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    • pp.622-625
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    • 2016
  • Korea is surrounding by the sea on three sides and consists of mountainous terrain over 65% and the rainfall is high. Therefore, accidents of the vehicle rollover and crash are frequently occurring. Lifesaving system is being urgent required to solve these problems. In this paper, we designed and implemented a lifesaving system for handling a car crash and rollover and verified the functionality through the test.

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Crash FE Analysis of Front Side Assembly of Passenger Cars for Management of Collapse Shape Via Variation of Thickness with Reverse Engineering (승용차용 프론트 사이드 조립체의 박판 두께 조정에 따른 붕괴모드 제어에 관한 역설계적 유한요소 층돌해석)

  • Kim, Yong-Woo;Kim, Jeong-Ho
    • Transactions of the Korean Society of Automotive Engineers
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    • v.16 no.2
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    • pp.106-113
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    • 2008
  • The goal of crashworthiness is an optimized vehicle structure that can absorb the crash energy by controlled vehicle deformations while maintaining adequate space so that the residual crash energy can be managed by the restraint systems to minimize crash loads transfer to the vehicle occupants. Front side assembly is one of the most important energy absorbing components in relating to the crashworthiness design of vehicle. The structure and shape of the front side assemblies are different depending on auto-makers and size of vehicles. Thus, it is not easy to grab an insight on designer's intention when you glance at a new front side member without experiences. In this paper, we have performed the explicit nonlinear dynamic finite element analysis on the front side assembly of a passenger car to investigate the effect of thickness distribution of the front side assembly on the collapse shape, which is important in the aspect of controlling deformation to maintain adequate space, from the viewpoint of reverse engineering. To do this, we have performed crash FE analysis for the assembly by varying the thickness distribution of the assembly.

Nonlinear Finite Element Crash Analysis of Guardrail Structures Using Supports Made of Composite Materials (복합재 지주를 적용한 가드레일 구조체의 비선형 유한요소 충돌 해석)

  • Kim, Gyu-Dong;Lee, Sang-Youl
    • Composites Research
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    • v.29 no.6
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    • pp.363-368
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    • 2016
  • This study performed a nonlinear finite element crash analysis of guardrail structures using supports made of composite materials. In this study, we used a new [0/90/90/0] laminated Boron fiber composite for resisting the crash effects. Based on the improved ground-structure interaction model, appropriate ground properties to the support were determined. In particular, the complex crash mechanism of guardrails was studied using various parameters. The parametric studies are focused on the various effects of car crash on the structural performance and thickness of supports. The numerical results for various parameters are verified by comparing those using existing steel materials.