Response of multi-grid obstruction block guardrail system under impact loading

XU Ting; MIAO Fuxing; ZHOU Fenghua; YANG Liming

doi:10.11883/bzycj-2016-0354

Volume 38 Issue 4

May 2018

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XU Ting, MIAO Fuxing, ZHOU Fenghua, YANG Liming. Response of multi-grid obstruction block guardrail system under impact loading[J]. Explosion And Shock Waves, 2018, 38(4): 820-826. doi: 10.11883/bzycj-2016-0354

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XU Ting, MIAO Fuxing, ZHOU Fenghua, YANG Liming. Response of multi-grid obstruction block guardrail system under impact loading[J]. Explosion And Shock Waves, 2018, 38(4): 820-826. doi: 10.11883/bzycj-2016-0354

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Response of multi-grid obstruction block guardrail system under impact loading

doi: 10.11883/bzycj-2016-0354

School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, Zhejiang, China

Received Date: 2016-11-23
Rev Recd Date: 2017-01-06
Publish Date: 2018-07-25

Abstract

Abstract

The thin-wall obstruction block structure plays a significant role in energy absorbing guardrail systems. Research on the methods to improve the guardrail protection capability and minimize the passenger injury becomes increasingly more important. In this paper, using the commercial finite element software ABAQUS, we investigated the response of the single-span multi-grid obstruction block guardrail systems with three different wall thicknesses crashed by a mass block. The simulation results prove that the two-grid obstruction block with a gauge of 2 mm exhibits the best final internal energy mass ratio and energy absorbing density. In addition, the resultant acceleration peak of the 2 mm two-grid model is about 47.6% smaller than that of the 3 mm one-grid model, indicating a better passenger safety performance. According to the Wayne state tolerance curve (WSTC), the deceleration of a human's head is within the safety range for simulation cases. This study provides design guidelines for enhancing a guardrail system's impact resistant ability and safety grade.
- impact response,
- finite element analysis,
- multi-grid obstruction block,
- guardrail system

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References(13)

References

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