Predicting the Kinematic Response of a Helmeted Headform during Oblique Impacts

IF 0.8 4区工程技术 Q4 ENGINEERING, MECHANICAL

Transactions of The Canadian Society for Mechanical Engineering Pub Date : 2022-03-07 DOI:10.1139/tcsme-2021-0119

D. E. Abram, Adrian Wikarna, F. Golnaraghi, G. Wang

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引用次数: 0

Abstract

160 oblique impact tests were performed to study the relationship between the kinematic response of a helmeted headform and impact severity caused by the change of speed (Group 1) and anvil angle (Group 2). For this work, the kinematic response of a helmeted headform is evaluated by measuring linear acceleration, rotational acceleration, and rotational velocity of the headform. In Group 1, a football helmet was tested at 45o anvil angle at four different impact speeds ranging from 4.5m/s and 7.4m/s on five impact locations. Results showed that for all cases, the relationship between impact speed and helmeted headform kinematic response was linear, with an average R2 value of 0.98. In Group 2, the helmeted headform was tested at 5.5m/s impact speed at six different anvil angles between 15o and 55o, and the response was fitted with a second-degree polynomial (curve) with an average R2 value of 0.96. The predicted helmeted headform kinematic response was obtained and validated experimentally, and the average error was found to be 8.3%. The results showed that it is possible to predict the kinematic response of a helmeted headform by interpolating or extrapolating the data without having to perform extra impact test.

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预测头盔头部在倾斜碰撞中的运动响应

进行了160次斜向冲击试验，以研究头盔人头模型的运动响应与速度变化（第1组）和砧座角度变化（第2组）引起的冲击严重程度之间的关系。在这项工作中，通过测量人头模型的线性加速度、旋转加速度和旋转速度来评估带头盔的人头模型的运动学响应。在第1组中，在45°砧角下，在五个撞击位置以4.5米/秒和7.4米/秒的四种不同撞击速度对足球头盔进行了测试。结果表明，在所有情况下，冲击速度与头盔-人头模型运动学响应之间呈线性关系，平均R2值为0.98。在第2组中，在15°和55°之间的六个不同砧角下，以5.5m/s的冲击速度对带头盔的人头模型进行测试，并用二次多项式（曲线）拟合响应，平均R2值为0.96。通过实验获得并验证了预测的头盔-人头模型运动响应，平均误差为8.3%。结果表明，通过插值或外推数据可以预测头盔-人头头部模型的运动响应，而无需进行额外的冲击试验。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Transactions of The Canadian Society for Mechanical Engineering 工程技术-工程：机械

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

5 months

期刊介绍： Published since 1972, Transactions of the Canadian Society for Mechanical Engineering is a quarterly journal that publishes comprehensive research articles and notes in the broad field of mechanical engineering. New advances in energy systems, biomechanics, engineering analysis and design, environmental engineering, materials technology, advanced manufacturing, mechatronics, MEMS, nanotechnology, thermo-fluids engineering, and transportation systems are featured.