食管黏膜组织在轴向延伸下的摩擦特性研究

发布时间：2018-06-17 13:32

  本文选题：食管黏膜 + 轴向延伸　； 参考：《摩擦学学报》2017年05期

【摘要】：对食管黏膜组织沿轴向分别以不同的延伸率进行延伸,再通过往复摩擦试验近似模拟内镜前端进入食管的过程,研究了食管黏膜组织在不同轴向延伸率伸长下的摩擦性能变化.结果表明:从轴向无延伸到延伸率达到80%时,内镜前端与食管黏膜组织间的摩擦运行行为从食管黏膜组织只发生弹性变形的黏着状态变化到黏着和滑移的混合状态,摩擦阻力和能耗增大,摩擦系数增加.食管黏膜组织的摩擦学性能与其表面结构和力学性能密切相关.在沿轴向延伸率逐渐增加的延伸状态下,食管黏膜表面的皱褶被拉平,维持黏液润滑的特性变差;随着食管黏膜组织轴向延伸率的增加,黏膜组织的弹性模量增加,抵抗摩擦变形的能力增强,摩擦阻力增大.研究结果为临床胃镜诊疗的安全操作提供了理论依据.
[Abstract]:The esophageal mucosal tissues were extended with different elongation along the axial direction, and the tribological properties of esophageal mucosal tissues under different axial elongation were studied by the reciprocating friction test to simulate the process of the anterior end of the esophagus entering into the esophagus. The results showed that the frictional behavior between the anterior end of the endoscope and the esophageal mucosal tissue changed from the adhesive state of elastic deformation to the mixed state of adhesion and slippage when the elongation reached 80%. Friction resistance and energy consumption increase and friction coefficient increases. The tribological properties of esophageal mucosa are closely related to its surface structure and mechanical properties. Under the condition of increasing the axial elongation, the folds on the surface of the esophagus mucosa were flattened, and the characteristics of maintaining mucus lubrication became worse, and with the increase of the axial elongation of the esophageal mucosa, the elastic modulus of the mucosal tissue increased, and the elastic modulus of the esophageal mucous membrane increased with the increase of the axial elongation of the esophageal mucosal tissue. The ability of resisting friction deformation is enhanced and friction resistance is increased. The results provide a theoretical basis for the safe operation of clinical gastroscopy.
【作者单位】： 西南交通大学摩擦学研究所;
【基金】：国家自然科学基金项目(51675447,51290291)资助~~
【分类号】：R318.01;R573
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本文编号：2031228