Evaluation of J-initiation fracture toughness of ultra high molecular weight polyethylene used in total joint replacements.
Evaluation of J-initiation fracture toughness of ultra high molecular weight polyethylene used in total joint replacements.
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DOI：
10.1016/j.polymertesting.2008.03.007
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发表时间：
2008-08-01
期刊：
影响因子：
5.1
通讯作者：
Rimnac, C. M.
中科院分区：
文献类型：
--
作者：
Varadarajan, R.;Rimnac, C. M.
超高分子量聚乙烯（UHMWPE）全关节置换部件的断裂是一个临床问题。因此，表征UHMWPE的抗断裂性非常重要。为了确定金属和金属合金的J-起始断裂韧性（JQ），ASTM E1820推荐了一种基于经验裂纹钝化线的程序。已发现这种方法高估了UHMWPE等坚韧聚合物的起始韧性。因此，在这项研究中，一种新的实验方法的基础上裂纹尖端张开位移（CTOD）被用来评估超高分子量聚乙烯材料的JQ。在环境空气和生理相关的37°C PBS环境中对三种不同UHMWPE配方的J-起始断裂韧性进行了实验测量，并与钝化线方法进行了比较。对于本研究中检查的UHMWPE材料和环境，发现CTOD方法提供的JQ值与钝化线方法相当。在这项研究中使用的CTOD方法是基于实验观察，因此，不依赖于经验关系或断裂表面测量。因此，使用本研究中提出的基于实验的CTOD方法确定JQ对于UHMWPE和其他坚韧聚合物可能是比钝化线方法更可靠的方法。
Fracture of ultra high molecular weight polyethylene (UHMWPE) total joint replacement components is a clinical concern. Thus, it is important to characterize the fracture resistance of UHMWPE. To determine J-initiation fracture toughness (JQ) for metals and metallic alloys, ASTM E1820 recommends a procedure based on an empirical crack blunting line. This approach has been found to overestimate the initiation toughness of tough polymers like UHMWPE. Therefore, in this study, a novel experimental approach based on crack tip opening displacement (CTOD) was utilized to evaluate JQ of UHMWPE materials. J-initiation fracture toughness was experimentally measured in ambient air and a physiologically-relevant 37°C PBS environment for three different formulations of UHMWPE and compared to the blunting line approach. The CTOD method was found to provide JQ values comparable to the blunting line approach for the UHMWPE materials and environments examined in this study. The CTOD method used in this study is based on experimental observation and, thus, does not rely on an empirical relationship or fracture surface measurements. Therefore, determining JQ using the experimentally based CTOD method proposed in this study may be a more reliable approach for UHMWPE and other tough polymers than the blunting line approach.
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DOI：
10.1002/polb.1991.090290702
发表时间：
1991-06-01
影响因子：
--
作者：
MAI, YW;POWELL, P
通讯作者：
POWELL, P
影响因子：
14
作者：
Pascaud, RS;Evans, WT;FitzPatrick, DP
通讯作者：
FitzPatrick, DP
影响因子：
4.5
作者：
HUANG, DD;WILLIAMS, JG
通讯作者：
WILLIAMS, JG
影响因子：
3.2
作者：
RIMNAC, CM;WRIGHT, TM;KLEIN, RW
通讯作者：
KLEIN, RW
影响因子：
4.6
作者：
SWEI, H;CRIST, B;CARR, SH
通讯作者：
CARR, SH