The frictional performances of surgical sutures have been found to play a vital role in their functionality. The purpose of this paper is to understand the frictional performance of multifilament surgical sutures interacting with skin substitute, by means of a penetration friction apparatus (PFA). The influence of the size of the surgical suture was investigated. The relationship between the friction force and normal force was considered, in order to evaluate the friction performance of a surgical suture penetrating a skin substitute. The friction force was measured by PFA. The normal force applied to the surgical suture was estimated based on a Hertzian contact model, a finite element model (FEM), and a uniaxial deformation model (UDM).

The results indicated that the penetration friction force increased as the size of the multifilament surgical suture increased. In addition, when the normal force was predicted by UDM, it was found that the ratio between the friction force and normal force decreased as the normal force increased. A comparison of the results suggested that the UDM was appropriate in predicting the frictional behavior of surgical suturing.

已经发现外科缝合线的摩擦性能对其功能起着至关重要的作用。本文的目的是通过穿透摩擦装置（PFA）了解与皮肤替代物相互作用的多丝外科缝合线的摩擦性能。研究了手术缝合线尺寸的影响。考虑摩擦力和法向力之间的关系，以评估穿透皮肤替代物的外科缝合线的摩擦性能。摩擦力通过PFA测量。根据赫兹接触模型，有限元模型（FEM）和单轴变形模型（UDM）估算施加到手术缝合线上的法向力。

结果表明，穿透摩擦力随着复丝手术缝合线尺寸的增加而增加。另外，当通过UDM预测法向力时，发现摩擦力与法向力之间的比率随着法向力的增加而减小。结果的比较表明，UDM适用于预测手术缝合的摩擦行为。