Low-cycle fatigue of surgical cements

• Autorzy: Balin, A. , Junak, G.
• Konferencja: 12th International Scientific Conference CAM3S'2006, 27-30th November 2006, Gliwice-Zakopane
• Języki publikacji: EN

Abstrakty

EN

Purpose: In case when surgical cement is used to fix endoprostheses of joints the fatigue character of mechanical interraction in the cement seems to be a significant importance. The paper suggests to adapt the research method of low cycle fatigue for modelling the loads on surgical cements in an artificial hip joint. Surgical cements have also been modified in order to improve their functional properties. Design/methodology/approach: Low cycle fatigue tests were conducted on samples made from Palamed cement without an addition and on samples modified with glassy carbon and titanium. The tests were conducted on a servohydraulic fatigue testing machine, MTS-810, with displacement control. Findings: Fatigue tests proved viscoelastic character of all the tested materials. During the fatigue tests, the phenomenon of stress cyclic relaxation was observed. Research limitations/implications: Modelling the loadings of cement in endoprostheses of joints with the low cycle fatigue method takes into account all high value stresses, while cement is being used for endoprostheses for many years in the conditions of random stress and deformation courses. Therefore the obtained stress and deformation values are bigger than those which have been obtained in real conditions in the same time. Practical implications: The low cycle fatigue tests carried out showed how important is the factor of time for the behavior of surgical cement in the conditions of changeable loadings. This fact is essential to assess its usability for endoprosthesoplasty of joints, specially of a hip joint. Post deformation return which is a characteristic feature for material viscoelasticity enables its regeneration conditioning expected durability of endoprosthesis of joints. Originality/value: Low cycle fatigue testing method for modelling of loads on surgical cement in artificial hip joint enables to carry out the tests in a shorter period of time.

Słowa kluczowe

PL

zmęczenie; biomateriały; właściwości magnetyczne; modelowanie

EN

fatigue; biomaterials; mechanical properties; modelling

• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 20, nr 1-2
• Strony: 211-214
• Opis fizyczny: Bibliogr. 31 poz., rys.

Twórcy

autor

Balin, A.

autor

Junak, G.

• Department of Materials Mechanics, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland,

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