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首页> 外文期刊>Journal of Biomechanics >Effects of body configuration on pelvic injury in backward fall simulation using 3D finite element models of pelvis-femur-soft tissue complex.
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Effects of body configuration on pelvic injury in backward fall simulation using 3D finite element models of pelvis-femur-soft tissue complex.

机译:使用骨盆-股骨-软组织复合体的3D有限元模型在向后跌倒模拟中,身体形态对骨盆损伤的影响。

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摘要

Injuries due to backward fall apart from sideways fall are a major health problem, particularly among the aged populations. The objectives of this study was to evaluate the responses to changing body configurations (angle between the trunk and impacting floor as 0 degrees, 15 degrees, 45 degrees and 80 degrees) during backward fall, based on a previously developed CT-scan-derived 3D non-linear and non-homogeneous finite element (FE) model of pelvis-femur-soft tissue complex with simplified biomechanical representation of the whole body. Under constant impact energy, these FE models evaluated the pelvic injury situations on the basis of peak impact force (7.64-16.74 kN) and peak principal compressive strain (more than 1.5%), consistent with the clinically observed injuries (sacral insufficiency, coccydynia). Also the change in location of peak strain and increase in peak impact force for changing configurations from 0 degrees to 80 degrees indicated the effect of whole body inertia during backward fall. It was also concluded that the inclusion of sacro-iliac and acetabular cartilages in the above FE models will further reduce above findings marginally (9.2% for 15 degrees fall). These quantifications would also be helpful for a better design and development of safety structures such as safety floor for the nursing home or home for the aged persons.
机译:除了侧身跌倒之外,倒退造成的伤害是主要的健康问题,尤其是在老年人口中。这项研究的目的是基于先前开发的CT扫描得出的3D评估倒退过程中对身体形态变化(躯干和撞击地板之间的角度为0度,15度,45度和80度)的响应骨盆-股骨-软组织复合体的非线性和非均匀有限元(FE)模型,简化了整个人体的生物力学表示。在恒定的冲击能量下,这些有限元模型根据峰值冲击力(7.64-16.74 kN)和峰值主压缩应变(大于1.5%)评估了骨盆损伤情况,与临床观察到的损伤(s骨功能不全,球后痛)一致。同样,在将构架从0度更改为80度时,峰值应变位置的变化和峰值冲击力的增加也表明了人体惯性的影响。还得出结论,在上述有限元模型中包括sa和髋臼软骨将进一步略微减少上述发现(15度下降时为9.2%)。这些量化也将有助于更好地设计和开发安全结构,例如疗养院或老人院的安全地板。

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