皮肤往复摩擦条件下的损伤研究  

Skin Traumas under Reciprocating Friction Conditions

作　　者：石磊[1] 谢旭辉[1] 徐萍[1] 李炜[1] 

机构地区：[1]西南交通大学材料先进技术教育部重点实验室摩擦学研究所,四川成都610031

出　　处：《摩擦学学报》2015年第1期66-73,共8页Tribology

基　　金：国家自然科学基金项目(51175440和51290291)资助~~

摘　　要：选用成年健康活体兔皮肤替代残肢皮肤,在UMT-Ⅱ多功能摩擦磨损试验机上通过模拟残肢皮肤/接收腔界面间的黏着和中间过渡摩擦行为,对兔皮肤的摩擦系数、Ft-D曲线、能量损耗以及这两种摩擦行为所引起的兔皮肤摩擦损伤机理进行了研究.结果表明:在0.5或3.5 N法向力作用下,随着往复摩擦位移从±2.5 mm增加到±5 mm,兔皮肤的摩擦行为从黏着状态转变到中间过渡状态,往复摩擦过程中的能量损耗增加;由于中间过渡状态下的兔皮肤摩擦系数较高,能量损耗较大,因而造成的皮肤损伤程度比黏着状态严重;与人体手掌或脚掌皮肤相比,兔皮肤的角质层较薄,很难形成摩擦水泡.Healthy adult rabbit skin was used instead of stump skin. By using an UMT-II tribometer to simulate stump skin/prosthetic socket interface under friction behaviors of the sticking and the intermediate regimes, the friction coefficient,Ft-D curve,energy dissipation and traumas mechanism of rabbit skin were investigated. The results show that under the normal force of 0. 5 N or 3. 5 N,the friction behavior of rabbit skin changed from the sticking regime to the intermediate regime with the reciprocating displacement from ± 2. 5 mm to ± 5 mm,consequently,energy dissipation in the process of reciprocating friction increased. Because the rabbit skin friction coefficient and energy dissipation in the intermediate regime were higher than that in the sticking regime,the degree of skin traumas was more severe. Compared with human hands or feet skin,the cutin layer of rabbit skin was thin,so it is difficult to form a friction blister.

关 键 词：兔皮肤 摩擦行为 能量耗散 损伤 组织病理 

分 类 号：R338[医药卫生—人体生理学]