English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Pole side impact is one of the most common types of vehicle collisions. The pole side impact at high vehicle speed induces not only local collapse but also bending of the vehicle body. However, the estimation method of the vehicle speed with consideration of the bending has not been established yet. In the present study, the deformation of the vehicle body at the pole side impact experiment with impact speed of 80 km/h was investigated. The results revealed that the collapse deformation first occurred and then the bending deformation followed. In order to understand the deformation of the vehicle at high-speed pole side impact, lateral local compression test and three-point bending test of rectangular steel tubes were performed. It was found that the deformation of the tube was similar to that of the vehicle at the pole side impact experiment, when the specimen was subjected to the sequential test of lateral local compression and three-point bending. The change in the energy absorbed by the deformation of tube in the sequential test was also found to be similar to that in the vehicle experiment. These similarities are useful to investigate the vehicle collision speed at high-speed pole side impact based on the deformation and the absorbed energy of rectangular metal tubes. : Automobile, Traffic accident investigation, Vehicle collision, Pole side impact, Material testing, Lateral local compression, Three-point bending, Absorbed energy 1. 緒 言 車両のポール側面衝突事故は典型的な交通事故形態のひとつであり,横滑りした車両の側面が電柱ポールなど の狭小剛体に衝突するものである.日本国内における交通事故の分析によれば,ポール側面衝突における衝突部 位は左右前席ドア,衝突速度は 40~60 km/hが多い(立石他, 1999).また,ポール側面衝突は,他の事故形態に比 べて発生率は低いものの,死亡事故や重傷事故の割合が高くなっている(上野他, 2008).したがって,乗員から事 故原因の解明に必要な情報が得にくい事故形態に位置づけられる. 交通事故の原因解明のために行う交通事故鑑定では,衝突時の車両速度は事故状況再現に重要な要素であり, その正確な推定が不可欠である.現在は,主として車体変形に消費されたエネルギー(変形吸収エネルギー)を *1 正員,岡山県警察本部 刑事部 科学捜査研究所(〒700-0816 岡山県岡山市北区富田町 1-3-2) *2 正員,岡山理科大学 工学部 機械システム工学科(〒700-0005 岡山県岡山市北区理大町 1-1) *3 正員,岡山大学大学院 自然科学研究科(〒700-8530 岡山県岡山市北区津島中 3-1-1) *4 正員,科学警察研究所 交通科学部(〒277-0882 千葉県柏市柏の葉 6-3-1) E-mail of corresponding author: op-lhsih296@pref.okayama.jp 1 Received 20 October 2014 No.14-00542 [DOI:10.1299/transjsme.14-00542], J-STAGE Advance Publication date : 28 May, 2015

Deformation of vehicle body in pole side impact and its experimental modeling by means of rectangular steel tube