NEGATIVE POISSON RATIOS AND STRAIN-DEPENDENT MECHANICAL-PROPERTIES IN ARTERIAL PROSTHESES

被引：80
|
作者：
CADDOCK, BD
EVANS, KE
机构：
[1] UNIV LIVERPOOL,DEPT MAT SCI & ENGN,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND
[2] UNIV EXETER,SCH ENGN,EXETER EX4 4QF,DEVON,ENGLAND
来源：
BIOMATERIALS | 1995年 / 16卷 / 14期
基金：
英国工程与自然科学研究理事会;
关键词：
VASCULAR PROSTHESIS; NEGATIVE POISSON RATIO; AUXETIC;
D O I：
10.1016/0142-9612(95)98908-W
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
The elastic properties of two artificial arterial prostheses have been measured. One is a fibrillar polyurethane (PU) material, the other is an expanded polytetrafluoroethylene (ex-PTFE). It is shown that the conventional assumption of incompressibility is invalid for both materials and that changes in the thickness of the prosthetic artery wail must be measured directly. The ex-PTFE shows highly strain-dependent properties, the most significant being that of large negative through-thickness Poisson ratios, up to -11. These results have important consequences for matching the properties of prostheses to natural materials.
引用
收藏
页码：1109 / 1115
页数：7
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