FINITE ELEMENT ANALYSIS OF A STEEL POST INSERTED IN POLYMER CYLINDER UNDER PULL-OUT AND TORQUE LOADINGS | ||||
The International Conference on Applied Mechanics and Mechanical Engineering | ||||
Article 56, Volume 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., May 2008, Page 96-107 PDF (316.51 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/amme.2008.39303 | ||||
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Authors | ||||
DAMMAK M.1; KHARRAT M.2; SHIRAZI A.3; TRABELSI M.4 | ||||
1Professor, Dpt. of Technology, Institut Préparatoire aux Etudes d’Ingénieurs de Sfax, Sfax, Tunisia. | ||||
2Associate professor, Dpt. of Technology, Institut Préparatoire aux Etudes d’Ingénieurs de Sfax, Sfax, Tunisia. | ||||
3Professor, Dpt. of Mech., Ecole Polytechnique de Montréal, Montréal, Canada. | ||||
4Graduate student, LASEM, Ecole Nationale d’Ingénieurs de Sfax, Tunisia. | ||||
Abstract | ||||
ABSTRACT Posts are used in various implant designs to contribute to the short- and long- term fixation stability of artificial joints. This study was undertaken to provide further information on the effect of torque loading on the pull-out response of steel post inserted in polymer material. 3 D finite element analysis, using ABAQUS program, were developed on metallic post inserted in polymer cylinder with initial interference under pull-out, torque and combined torque/pull-out loadings. For the polymer cylinder materials we have considered a High Density Polyethylene (HDPE) cylinder with well known mechanical and tribological properties. The predicted ultimate pull-out force undergoes non linear decrease as the applied torque increases. The important decreasing rate was observed when the applied torque exceeded 25 % of the ultimate torque. The radial and shear stresses are significantly changed under pull-out and the combined pull-out/torque forces. The finite element prediction corroborate with our recently experimental results developed on HDPE material. The predicted results of post inserted in polyethylene materials can, therefore, demonstrate the effect of torque loading on the pull-out force. | ||||
Keywords | ||||
Finite element method; interface; Load transfer; Friction; Pull-out; torque; Combined pull-out/torque | ||||
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