Characterization of the anisotropic mechanical behavior of human abdominal wall connective tissues
| Autor: | Mathias Brieu, Jean-François Witz, Maurice De Meulaere, Thierry Hoc, Frédéric Turquier, Vit Novacek, Laure Astruc |
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| Rok vydání: | 2017 |
| Předmět: |
Male
Materials science 0206 medical engineering Constitutive equation Biomedical Engineering 02 engineering and technology Biomaterials Stress (mechanics) Abdominal wall Tensile Strength Materials Testing medicine Humans Anisotropy Aged Mechanical Phenomena Aged 80 and over Abdominal Wall Anatomy 021001 nanoscience & nanotechnology Microstructure 020601 biomedical engineering Characterization (materials science) Biomechanical Phenomena Transverse plane medicine.anatomical_structure Mechanics of Materials Connective Tissue Linea alba (abdomen) Female Stress Mechanical 0210 nano-technology |
| Zdroj: | Journal of the mechanical behavior of biomedical materials. 82 |
| ISSN: | 1878-0180 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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