BIAXIAL TESTING OF MEMBRANE BIOMATERIALS - TESTING EQUIPMENT AND PROCEDURES

被引:54
作者
NIELSEN, PMF
HUNTER, PJ
SMAILL, BH
机构
[1] UNIV AUCKLAND,SCH ENGN,DEPT THEORET & APPL MECH,AUCKLAND,NEW ZEALAND
[2] UNIV AUCKLAND,SCH MED,DEPT PHYSIOL,AUCKLAND,NEW ZEALAND
来源
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME | 1991年 / 113卷 / 03期
关键词
D O I
10.1115/1.2894887
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
A testing facility for measuring the biaxial mechanical properties of highly deformable membranes is described. Forces are applied, via strain-gauge force transducers, to four points on each side of an initially square 12 to 25 mm membrane sample to produce biaxial extensions of up to 80 percent of undeformed length. Strain is estimated from the displacement of markers bounding a 1 to 2 mm central square. The accuracy of stress and strain field measurements has been assessed by finite element analysis of a biaxially-loaded isotropic elastic membrane. Major advantages of the present system over those previously described in the literature are that 1) sample mounting procedures are simplified, 2) there is provision for independent adjustment of stress field uniformity and measurement of the applied point forces and 3) faster strain rates can be imposed on the relatively small samples tested.
引用
收藏
页码:295 / 300
页数:6
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