Notched fatigue behavior of PEEK

被引：48
作者：
Sobieraj, Michacl C. [1 ,2 ]
Murphy, James E. [1 ,2 ]
Brinkman, Jennifer G. [1 ,2 ]
Kurtz, Steve M. [3 ,4 ]
Rimnac, Clare M. [1 ,2 ]
机构：
[1] Case Western Reserve Univ, Dept Orthopaed, Cleveland, OH 44106 USA
[2] Case Western Reserve Univ, Musculoskeletal Mech & Mat Labs, Dept Mech & Aerosp Engn, Cleveland, OH 44106 USA
[3] Drexel Univ, Sch Biomed Engn Sci & Hlth Syst, Philadelphia, PA 19104 USA
[4] Exponent Inc, Philadelphia, PA USA
来源：
BIOMATERIALS | 2010年 / 31卷 / 35期
关键词：
Orthopaedic implants; Notches; Fatigue; PEEK; Notched LEFM; REINFORCED POLYETHERETHERKETONE; CRACK;
D O I：
10.1016/j.biomaterials.2010.08.032
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
Poly(ether-ether-ketone) (PEEK) has been used as a load bearing orthopaedic implant material with clinical success. All of the orthopaedic applications contain stress concentrations (notches) in their design; however, little work has been done to examine the fatigue behavior of PEEK in the presence of a notch. This work examines both stress-life (S-N) fatigue behavior and the fracture behavior of unfilled PEEK under tension-tension loading in circumferentially grooved round bar specimens with different elastic stress concentration factors. It was found that the majority of the loading was elastic in nature, and that there was only a small portion on the lifetime where there was a detectable change in structural behavior prior to gross fracture. Fractographic analysis via SEM further elucidated the potential fracture micromechanisms. Additional analysis was conducted to estimate the percent of the lifetime spent in crack initiation vs. propagation, and it was found that the specimens spent the majority of the time in the crack initiation phase. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：9156 / 9162
页数：7
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