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Updated: May 1, 2026

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验证和应用一个有限元模型,模拟皮肤的故障值在不的穿孔时与不同的冲击器几何形状不同的冲击器几何形状

Joseph LeSueur¹, Carolyn E Hampton², Frank A Pintar³

¹Joint Department of Biomedical Engineering, Marquette University and Medical College of Wisconsin, United States; Neuroscience Research Labs, Zablocki Veterans Affairs Medical Center, United States.

Journal of the mechanical behavior of biomedical materials

|May 3, 2025

概括

这项研究开发了一种经过验证的有限元模型来模拟重力皮肤穿刺. 该模型显示,增加皮肤厚度需要更大的透力,有助于法医分析.

科学领域:

生物力学生物力学
法医科学法医科学法医科学
计算建模计算建模

背景情况:

像螺丝刀这样的工具造成的物伤害在法医病例中很常见.
有限的研究存在于的仪器皮肤穿刺和皮肤厚度的影响.
量化穿透皮肤的力量值对于法医调查至关重要.

研究的目的:

开发和验证一个有限元 (FE) 模型来模拟重力皮肤穿刺.
为了研究皮肤厚度和撞击器特征对皮肤透值的影响.
建立一个可靠的计算工具,用于法医分析重物伤害.

主要方法:

开发了一个有限元 (FE) 模型来模拟使用Ogden材料系数模拟皮肤的突穿孔.
对各种球形冲击器和皮肤厚度的实验力-时间数据验证了FE模型.
应用验证的模型来分析的仪器 (球形,六边形,Torx螺丝刀) 穿透.

主要成果:

该FE模型获得了0.725的平均CORA得分,表明与实验数据的良好一致.
皮肤透的最大主应力为54.8MPa的故障标准被确立.
增加皮肤厚度显著增加了故障时的力,位移和应变能量 (R2 ≥ 0.77).
撞击器横截面积与正常化力,位移和应变能量值 (R2 ≥0.88) 之间发现了线性关系.

结论:

经过验证的FE模型准确地模拟了重力皮肤穿刺.
皮肤厚度是影响穿透所需力的关键因素.
该模型在法医调查中提供了一个有价值的工具,用于确定穿透皮肤所需的力量.

关键词:

截面面积的横截面积是一个区域.材料表征材料的表征奥格登的是一种.螺丝刀螺丝刀在线皮肤厚度皮肤厚度

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