分形互锁设计的皮肤缝合界面拉伸破坏行为研究

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关键词：皮肤切口；缝合界面；界面力学；数字图像相关法

中图分类号：TB34;TP391.73

DOI：10.3969/j.issn.1004-132X.2025.07.006 开放科学（资源服务）标识码（OSID）：

Research on Tensile Failure Behaviors of Skin Suture Interfaces with Fractal Interlock Design

XU Linlong1JI Xiaogang1，2 * LI Huabin¹ JIANG Hao1 1.School of Mechanical Engineering，Jiangnan University，Wuxi，Jiangsu， 2.Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology， Wuxi，Jiangsu，

Abstract： In order to study the mechanism of the geometric structure of the wound interfaces on the tensile failure behaviors of the skin sutures，a fractal interlocking mechanism was developed based on the tensile failure behaviors of the skin suture interfaces. The fractal design of skin interface was carried out according to Koch interlock model，and the equivalent mechanics model was constructed for the interface with linear and sinusoidal center line distribution. Combined with numerical simulation and digital image correlation method，the tensile tests were carried out on the prepared suture structures，focusing on the progressive destructive behaviors of second-order tooth skin suture structures，and the effects of tooth sharp angle，fractal order and center line distribution on their tensile properties were further explored.Finally，taking tensile strength as the evaluation index，the parameter mapping model of each sensitive factor was constructed. The results show that the failure behaviors of the second order tooth interface are manifested as the load transfer from both sides of the tooth to the interface layer of the middle tooth， resulting in the uniform loss of the second order tooth. Smaller tooth angle and higher fractal order may improve the tensile properties of the skin interfaces， and the distribution of sinusoidal centerlines may make the structure have greater tensile strength. This paper may provide relevant reference for improving the healing rate of skin wound after clinical suture.

Key words： skin incision;suture interface; interface mechanics； digital image correlation method

0 引言

创面缝合手术过程中为了促进伤口愈合[1-2]以及术后疤痕的美观[3-4]，临床上越来越多地使用医用黏合剂配合皮下可吸收缝合线来对患者创面进行缝合，然而此种缝合方法会导致患者伤口在术后初期受到外部力时由于没有缝线容易产生一定的撕裂。（剩余15790字）