Development and Application of the Small Punch Test to UHMWPE
作者： Avram A. Edidin
DOI: 10.1016/B978-0-323-35401-1.00038-7
关键词: Oxidative degradation 、 Development (differential geometry) 、 Tribology 、 Total joint replacement 、 Composite material 、 Tension (physics) 、 Polyethylene 、 Materials science 、 Bearing (mechanical) 、 Test method
摘要: This chapter focuses on the development and application of small punch test for characterization ultra-high molecular weight polyethylene (UHMWPE) components total joint replacement (TJR). The was influenced by two clinically relevant related problems: relationship between process system variables polymer degradation, mechanical properties ensuing wear arthroplasty bearing. method, also known as disk bend test, originally proposed metallic from power industry. In UHMWPE, a disc material 0.0200 inches thick 0.250 diameter is indented hemispherical thereby creating biaxial state tension in material. Because enclosure specimen punch-and-die apparatus, thickness tolerance only 0.0005 inches. has proven extremely useful detection signature oxidative degradation associated with elevated levels irradiation-induced crosslinking. greatest strength testing methodology its minimal requirement material, permitting assays to be made almost any experimental configuration, one would expect this continue leveraged across mechanical, chemical, tribological spectra that describe orthopedic bearing world.
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