医用生物力学
醫用生物力學
의용생물역학
JOURNAL OF MEDICAL BIOMECHANICS
2009年
6期
452-457
,共6页
猪皮%黏弹性%棘轮效应%各向异性
豬皮%黏彈性%棘輪效應%各嚮異性
저피%점탄성%극륜효응%각향이성
Pig's skin%Visco-elasticity%Ratcheting%Anisotropic feature.
目的 对猪背部皮肤进行生物力学实验研究,评价其生物力学特性,为临床和皮类制品提供必要的理论基础.方法 选用猪背部皮肤为试验材料,分别进行不同加载速率的单调拉伸和拉拉循环实验研究,以及不同加载方向和不同应力水平下的蠕变和拉拉循环实验研究.结果 猪皮在皮纹线方向上抵抗拉伸、蠕变和循环变形的能力强于垂直皮纹线方向;猪皮的蠕变曲线由减速、稳定和破坏3阶段组成,并依赖于加载水平的大小;猪皮在非对称应力循环下体现出明显的棘轮效应,棘轮变形体现出显著的平均应力、应力幅值和加载速率效应.结论 实验对皮肤的黏弹性和各向异性的生物力学特性进行了系统的研究,为临床和皮类制品提供了必要的理论基础.
目的 對豬揹部皮膚進行生物力學實驗研究,評價其生物力學特性,為臨床和皮類製品提供必要的理論基礎.方法 選用豬揹部皮膚為試驗材料,分彆進行不同加載速率的單調拉伸和拉拉循環實驗研究,以及不同加載方嚮和不同應力水平下的蠕變和拉拉循環實驗研究.結果 豬皮在皮紋線方嚮上牴抗拉伸、蠕變和循環變形的能力彊于垂直皮紋線方嚮;豬皮的蠕變麯線由減速、穩定和破壞3階段組成,併依賴于加載水平的大小;豬皮在非對稱應力循環下體現齣明顯的棘輪效應,棘輪變形體現齣顯著的平均應力、應力幅值和加載速率效應.結論 實驗對皮膚的黏彈性和各嚮異性的生物力學特性進行瞭繫統的研究,為臨床和皮類製品提供瞭必要的理論基礎.
목적 대저배부피부진행생물역학실험연구,평개기생물역학특성,위림상화피류제품제공필요적이론기출.방법 선용저배부피부위시험재료,분별진행불동가재속솔적단조랍신화랍랍순배실험연구,이급불동가재방향화불동응력수평하적연변화랍랍순배실험연구.결과 저피재피문선방향상저항랍신、연변화순배변형적능력강우수직피문선방향;저피적연변곡선유감속、은정화파배3계단조성,병의뢰우가재수평적대소;저피재비대칭응력순배하체현출명현적극륜효응,극륜변형체현출현저적평균응력、응력폭치화가재속솔효응.결론 실험대피부적점탄성화각향이성적생물역학특성진행료계통적연구,위림상화피류제품제공료필요적이론기출.
Objective To investigate and evaluate the biomechanical property of the skin in pig's back in order to provide the essential theoretical basis for clinical and skin products.Method Taking the skin in pig's back as experimental material,the monotonic tensile and cyclic tension-tension tests with difierent loading rates was researohed respectivaly.Meanwhile,with different loading directions and stress levels the creep and cy-clic tension-tension tests were also been studied experimentally.Result The capacity of resisting tensile,creep and cyclic deformation of pig's skin in the direction along the Langer's line is stronger than that perpen-dicuiar to the Langer's line.The creep curve of pig's skin is load-dependent and consisted of three phases a-bout deceleration phase,stabilization phase and destruction stage.Pig's skin exhibits apparent ratcheting un-der asymmetry stress cycle.Ratcheting deformation displays significant mean stress,stress amplitude and loading speed dependence.Condusion Based on the experiment,the biomechanics property of skin's vis-coelasticity and anisotropic feature have been sysmarie stadied,it's provide necessaw theoretical fundation for clinical and leather products.
