Abdominal wall sheathing tissues are commonly involved in hernia formation. However, there is very limited work studying mechanics of all tissues from the same donor which prevents a complete understanding of the abdominal wall behavior and the differences in these tissues. The aim of this study was to investigate the differences between the mechanical properties of the linea alba and the anterior and posterior rectus sheaths from a macroscopic point of view. Eight full-thickness human anterior abdominal walls of both genders were collected and longitudinal and transverse samples were harvested from the three sheathing connective tissues. The total of 398 uniaxial tensile tests was conducted and the mechanical characteristics of the behavior (tangent rigidities for small and large deformations) were determined. Statistical comparisons highlighted heterogeneity and non-linearity in behavior of the three tissues under both small and large deformations. High anisotropy was observed under small and large deformations with higher stress in the transverse direction. Variabilities in the mechanical properties of the linea alba according to the gender and location were also identified. Finally, data dispersion correlated with microstructure revealed that macroscopic characterization is not sufficient to fully describe behavior. Microstructure consideration is needed. These results provide a better understanding of the mechanical behavior of the abdominal wall sheathing tissues as well as the directions for microstructure-based constitutive model.

腹壁鞘组织通常参与疝的形成。但是，研究来自同一供体的所有组织的力学的工作非常有限，这妨碍了对腹壁行为和这些组织之间差异的完全了解。这项研究的目的是从宏观的角度研究白线虫的机械性能与前，后直肌鞘的机械性能之间的差异。收集了两个男女的全厚度人前腹壁，共八个，并从三个鞘结缔组织中收集了纵向和横向样品。总共进行了398次单轴拉伸试验，并确定了行为的机械特性（小变形和大变形的切线刚度）。统计比较突出了在小变形和大变形下三种组织行为的异质性和非线性。在横向变形较大且应力较大的情况下，观察到较高的各向异性。还确定了根据性别和位置的白线虫机械特性的变化。最后，与微观结构相关的数据分散表明，宏观表征不足以完全描述行为。需要考虑微观结构。这些结果提供了更好的理解腹壁鞘组织的机械行为以及基于微观结构的本构模型的方向。在横向变形较大且应力较大的情况下，观察到较高的各向异性。还确定了根据性别和位置的白线虫机械特性的变化。最后，与微观结构相关的数据分散表明，宏观表征不足以完全描述行为。需要考虑微观结构。这些结果提供了更好的理解腹壁鞘组织的机械行为以及基于微观结构的本构模型的方向。在横向变形较大且应力较大的情况下，观察到较高的各向异性。还确定了根据性别和位置的白线虫机械特性的变化。最后，与微观结构相关的数据分散表明，宏观表征不足以完全描述行为。需要考虑微观结构。这些结果提供了更好的理解腹壁鞘组织的机械行为以及基于微观结构的本构模型的方向。与微观结构相关的数据分散表明，宏观表征不足以完全描述行为。需要考虑微观结构。这些结果提供了更好的理解腹壁鞘组织的机械行为以及基于微观结构的本构模型的方向。与微观结构相关的数据分散表明，宏观表征不足以完全描述行为。需要考虑微观结构。这些结果提供了更好的理解腹壁鞘组织的机械行为以及基于微观结构的本构模型的方向。