Mechanics of arterial subfailure with increasing loading rate.

Stemper BD; Yoganandan N; Pintar FA

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Mechanics of arterial subfailure with increasing loading rate.

机译：随着负荷率增加的动脉亚衰竭力学。

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Arterial subfailure leads to delayed symptomatology and high morbidity and mortality rates, particularly for the thoracic aorta and carotid arteries. Although arterial injuries occur during high-velocity automotive collisions, previous studies of arterial subfailure focused on quasi-static loading. This investigation subjected aortic segments to increasing loading rates to quantify effects on elastic, subfailure, and ultimate vessel mechanics. Sixty-two specimens were axially distracted, and 92% demonstrated subfailure before ultimate failure. With increasing loading rate, stress at initial subfailure and ultimate failure significantly increased, and strain at initial subfailure and ultimate failure significantly decreased. Present results indicate increased susceptibility for arterial subfailure and/or dissection under higher-rate extension. According to the present results, automotive occupants are at greater risk of arterial injury under higher velocity impacts due to greater body segment motions inaddition to decreased strain tolerance to subfailure and catastrophic failure.

机译：动脉亚功能衰竭会导致症状延迟以及高发病率和死亡率，特别是对于胸主动脉和颈动脉。尽管在高速汽车碰撞中发生动脉损伤，但先前对动脉亚衰竭的研究集中在准静态载荷上。这项研究使主动脉节段增加了负荷率，以量化对弹性，亚破坏和最终血管力学的影响。轴向分散了62个标本，有92％的样品在最终破坏前表现出亚失效。随着加载速率的增加，初始亚破坏和极限破坏时的应力显着增加，而初始亚破坏和极限破坏时的应变显着降低。目前的结果表明，在高速率扩张下，动脉亚衰竭和/或解剖的敏感性增加。根据目前的结果，由于更大的身体分段运动以及降低的对次故障和灾难性故障的应变耐受性，在较高的速度冲击下，汽车乘员遭受动脉伤害的风险更大。

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《Journal of Biomechanics》 |2007年第8期|共7页
作者
Stemper BD; Yoganandan N; Pintar FA;
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正文语种 eng
中图分类医用一般科学;生物力学;
关键词
Personal failure; Mechanics; elastic; Arterial; 力学;

机译：人为失灵;力学;弹性;动脉;力学;

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1. Mechanics of arterial subfailure with increasing loading rate. [J] . Stemper BD, Yoganandan N, Pintar FA Journal of Biomechanics . 2007,第8期

机译：随着负荷率增加的动脉亚衰竭力学。
2. Intra-aortic balloon pumping reduces the increased arterial load caused by acute cardiac depression, modifying central and peripheral load determinants in a time- and flow-related way [J] . BiaD., Cabrera-FischerE.I., ZócaloY., Heart and vessels: An international journal . 2012,第5期

机译：主动脉内球囊抽吸减少了由急性心脏抑郁引起的动脉负荷增加，以与时间和流量相关的方式修改了中枢和外周负荷决定因素
3. Intra-aortic balloon pumping reduces the increased arterial load caused by acute cardiac depression, modifying central and peripheral load determinants in a time- and flow-related way [J] . Daniel Bia, Edmundo I. Cabrera-Fischer, Yanina Zócalo, Heart and Vessels . 2012,第5期

机译：主动脉内球囊抽吸减少了由急性心脏抑郁引起的增加的动脉负荷，以与时间和流量相关的方式修改了中枢和外周负荷的决定因素
4. Damage Initiation and Growth in a Long Bone under Increasing Monotonic Loading Using the Continuum Damage Mechanics Principle [C] . M. H. Kargarnovin, M. Bagher-Ebrahimi, H. R. Katoozian International Conference on Engineering Computational Technology . 2006

机译：使用连续损伤力学原理增加单调载荷的长骨中的损伤引发和生长
5. Subfailure damage mechanics in cerebrovascular injury. [D] . Sullivan, Jacob W. 2013

机译：脑血管损伤中的亚失败损伤机制。
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Mechanics of arterial subfailure with increasing loading rate.

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