Determine deformation energy in side impact by incorporating contact area in crash algorithm

IF 2.2 3区医学 Q1 MEDICINE, LEGAL

Forensic science international Pub Date : 2024-10-28 DOI:10.1016/j.forsciint.2024.112259

Badr Ait Syad, El Mehdi Salmani

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引用次数: 0

Abstract

This research paper explores potential enhancements to the CRASH algorithm by proposing a hypothesis that relates deformation to applied stress instead of force. By incorporating stress instead of force, the calculation can account for the contact area, leading to a more precise estimation of impact velocity, particularly in side impacts. An initial evaluation of this energy absorption calculation formula is presented, focusing on side impacts in vehicle "2022 Hyundai Ion." Two side impact reports for the vehicle from the National Highway Traffic Safety Administration (NHTSA) database were utilized. One report involved the vehicle tilted at a 45-degree angle against a fixed pole with a 254 mm diameter, while the other examined the vehicle colliding with a moving deformable barrier (MDB) at various speeds. Additionally, a Monte Carlo simulation was conducted to validate the model's applicability. The verification process involved estimating stiffness coefficients from the first report and employing them to calculate energy absorption during the crash against the moving deformable barrier. The analysis demonstrates promising improvements in accurately calculating deformation energy absorbed during impacts.

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通过将接触面积纳入碰撞算法，确定侧面碰撞的变形能量

本研究论文通过提出将变形与外加应力而非外加力相关联的假设，探讨了增强 CRASH 算法的可能性。通过将应力而不是力纳入计算，可以考虑接触面积，从而更精确地估计撞击速度，尤其是侧面撞击。本文介绍了对这种能量吸收计算公式的初步评估，重点是 "2022 现代 Ion "汽车的侧面碰撞。我们使用了美国国家公路交通安全管理局（NHTSA）数据库中的两份车辆侧面碰撞报告。其中一份报告涉及车辆以 45 度角倾斜撞击直径为 254 毫米的固定杆，另一份报告则研究了车辆以不同速度与移动可变形障碍物（MDB）发生碰撞的情况。此外，还进行了蒙特卡罗模拟，以验证模型的适用性。验证过程包括估算第一份报告中的刚度系数，并利用这些系数计算与移动变形壁障碰撞时的能量吸收。分析表明，在准确计算碰撞过程中吸收的变形能量方面，该模型有了很大的改进。

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

Forensic science international 医学-医学：法

CiteScore

5.00

自引率

9.10%

发文量

285

审稿时长

49 days

期刊介绍： Forensic Science International is the flagship journal in the prestigious Forensic Science International family, publishing the most innovative, cutting-edge, and influential contributions across the forensic sciences. Fields include: forensic pathology and histochemistry, chemistry, biochemistry and toxicology, biology, serology, odontology, psychiatry, anthropology, digital forensics, the physical sciences, firearms, and document examination, as well as investigations of value to public health in its broadest sense, and the important marginal area where science and medicine interact with the law. The journal publishes: Case Reports Commentaries Letters to the Editor Original Research Papers (Regular Papers) Rapid Communications Review Articles Technical Notes.