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

页码：1109 / 1115

页数：7

共 22 条

[1] CRYSTALLINE NETWORKS WITH UNUSUAL PREDICTED MECHANICAL AND THERMAL-PROPERTIES [J].