Damage Tolerance Analysis of Artificial Mechanical Heart Valve

被引：0
|
作者：
Zhang J. [1 ]
Xing X. [1 ]
Ruan Y. [1 ]
Sun Z. [1 ]
机构：
[1] School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2021年 / 35卷 / 02期
关键词：
Composite; Damage tolerance analyses; Pre-existing defect size; Pyrolytic carbon for prosthetic heart valve;
D O I：
10.11901/1005.3093.2020.238
中图分类号：
学科分类号：
摘要：
The structural reliability of artificial mechanical heart valve made of pyrolytic carbon was assessed by means of damage tolerance methodology. In particular, a conservative estimation concerning the possible life-time, or the number of loading cycles was established, in that estimated duration, the pyrolytic carbon artificial heart valve can operate properly in service under given physiological loadings until a pre-existing flaw of minimum size grows gradually to the critical size. It is shown that a minimum pre-existing defect size computed is typically of the order of tens of microns for such pyrolytic carbon valve, for structural life of any pyrolytic carbon component in excess of patient lifetimes. The use of such analysis must be regarded as an essential requirement for the design and quality control of new and the existing pyrolytic carbon artificial heart valve in order to provide maximum assurance of patient safety. © 2021, Editorial Office of Chinese Journal of Materials Research. All right reserved.
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页码：128 / 134
页数：6
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