Coupled compressible flow and hyperelastic deformation in gas-driven channels within brain tissue with forensic applications

IF 4.1 2区医学 Q2 ENGINEERING, BIOMEDICAL

Journal of the Mechanical Behavior of Biomedical Materials Pub Date : 2027-01-01 Epub Date: 2026-10-16 DOI:10.1016/j.jmbbm.2026.107686

Valentina Kosmerl, Alexander L. Yarin

引用次数: 0

Abstract

The present work is devoted to simulations of muzzle-gas/air penetration into bullet channels of different orientation in brain tissue in human skull after short-range shooting. This involves compressible gas penetration and flow in a channel created by a supersonic bullet. The gas presses onto the channel wall and the surrounding hyperelastic brain tissue yields. As a result, the channel expands manifesting the so-called cavitation. The expanding channel interacts with the nearby parts of the skull, which restricts the brain tissue motion and causes appearance of the overloaded sections of the channel and the loss of its original axial symmetry. Channel contraction is also observed. The results might be important as a forensic tool capable of distinguishing between genuine suicide or a homicide staged as a suicide.

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脑组织内气体驱动通道的耦合可压缩流动和超弹性变形及其法医应用。

本文研究了近距离射击后，枪口气体/空气对人体脑组织中不同方向子弹通道的穿透情况。这涉及到可压缩气体在超音速子弹形成的通道中穿透和流动。气体压迫到通道壁上，使周围的超弹性脑组织屈服。因此，通道扩张，表现为所谓的空化。扩大的通道与头骨附近的部分相互作用，这限制了脑组织的运动，并导致通道过载部分的出现和失去其原有的轴对称。通道收缩也被观察到。作为一种能够区分真正的自杀或伪装成自杀的他杀的法医工具，这些结果可能很重要。

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

Journal of the Mechanical Behavior of Biomedical Materials 工程技术-材料科学：生物材料

CiteScore

7.20

自引率

7.70%

发文量

505

审稿时长

46 days

期刊介绍： The Journal of the Mechanical Behavior of Biomedical Materials is concerned with the mechanical deformation, damage and failure under applied forces, of biological material (at the tissue, cellular and molecular levels) and of biomaterials, i.e. those materials which are designed to mimic or replace biological materials. The primary focus of the journal is the synthesis of materials science, biology, and medical and dental science. Reports of fundamental scientific investigations are welcome, as are articles concerned with the practical application of materials in medical devices. Both experimental and theoretical work is of interest; theoretical papers will normally include comparison of predictions with experimental data, though we recognize that this may not always be appropriate. The journal also publishes technical notes concerned with emerging experimental or theoretical techniques, letters to the editor and, by invitation, review articles and papers describing existing techniques for the benefit of an interdisciplinary readership.