复杂的子负荷和伤害耐受度在侧向曲与头部旋转从人体尸体测试
Narayan Yoganandan1, Jamie Baisden1, Aditya Vedantam1
1Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI 53226.
概括
自动驾驶汽车可能会改变乘客的姿势,影响头脊椎的耐受性. 这项研究测量了尸体样本中的横向曲力和时刻,揭示了 atlas 骨折和带损伤.
科学领域:
- 生物力学 生物力学
- 整形外科手术 整形外科手术
- 汽车安全工程 汽车安全工程
背景情况:
- 自动化车辆的进步引入了非标准的乘客姿势.
- 改变姿势可能会影响头脊椎损伤的耐受性.
- 了解这些公差对于设计乘客安全系统至关重要.
研究的目的:
- 为了确定头部椎脊柱在初始头部旋转姿势中的侧向曲容忍度.
- 为了描述由这些负荷造成的损伤模式.
- 为提高自动驾驶汽车的安全提供数据.
主要方法:
- 人类尸体的头脊椎复合体被使用.
- 一个定制的装载装置以1.5米/秒的速度施加横向曲负荷.
- 负荷和时刻被测量在尾和下部.
主要成果:
- 量化了尾和下部的峰值力和时刻.
- 在80%的标本中发生了ipsilateral atlas侧面质量骨折.
- 观察到关节扩张和囊带损伤.
结论:
- 最初的头部旋转会改变头部椎脊柱对横向曲的耐受性.
- 在这些条件下,阿特拉斯骨折是一个重要的伤害模式.
- 需要进一步的研究来完善耐受性数据和伤害预测模型.
相关概念视频
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Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
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It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
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Unsymmetric Bending
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Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The...
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