Numerical Analysis Of Stress Distribution In Neck Area On Co Cr Alloy Total Hip Replacement Implant
Abstract
Total hip replacement implants represent permanent implants, and require large bone and cartilage removal during implantation. Revision would affect joint capability to sustain load, which makes this procedure irreversible. During exploitation, i.e. everyday activities, implants are exposed to high influence of dynamic load, which will lead to failure of material by fatigue. Highest stress states on total hip replacement implants are present in neck area of implant, which is a position of crack initiation. Under loading neck area of implant contains tension and compression zones. Crack initiation on neck side under tension would lead to crack opening and certain fracture of the material. Implants are designed to reduce stress concentration on tension side of the neck and to create maximal stress concentration on compression side of the neck, where eventual crack would be pressed by material preventing its further propagation. Implants are examined with experimental and numerical method...s. Most common numerical method is finite element method (FEM), used to simulate different loading conditions. Numerical analysis of stress distribution in neck area on specific implant was computed for static load equal to maximal load applied on implant. Subject of this paper is influence of implant geometry on stress distribution in neck area, thereby analysis was performed only for implant. Contact bone-implant was compensated with adequate boundary conditions. Material properties of selected implant were obtained from literature. Four numerical models were created in order to show how certain reductions of material influence on stress distribution in neck area of implant. The objective of this paper was to analyse these solutions.
Keywords:
Total hip replacement implant / Co-Cr alloy / Stress distribution / Finite element method / Fatigue crackSource:
International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH 2017, 2017, 45-URI
http://cnntechno.com/docs/CNN%20TECH%202017%20-%20Book%20of%20abstracts.pdfhttps://machinery.mas.bg.ac.rs/handle/123456789/6243
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Inovacioni centarTY - CONF AU - Milovanović, Aleksa AU - Sedmak, Aleksandar AU - Čolić, Katarina AU - Tatić, Uroš AU - Đorđević, Branislav PY - 2017 UR - http://cnntechno.com/docs/CNN%20TECH%202017%20-%20Book%20of%20abstracts.pdf UR - https://machinery.mas.bg.ac.rs/handle/123456789/6243 AB - Total hip replacement implants represent permanent implants, and require large bone and cartilage removal during implantation. Revision would affect joint capability to sustain load, which makes this procedure irreversible. During exploitation, i.e. everyday activities, implants are exposed to high influence of dynamic load, which will lead to failure of material by fatigue. Highest stress states on total hip replacement implants are present in neck area of implant, which is a position of crack initiation. Under loading neck area of implant contains tension and compression zones. Crack initiation on neck side under tension would lead to crack opening and certain fracture of the material. Implants are designed to reduce stress concentration on tension side of the neck and to create maximal stress concentration on compression side of the neck, where eventual crack would be pressed by material preventing its further propagation. Implants are examined with experimental and numerical methods. Most common numerical method is finite element method (FEM), used to simulate different loading conditions. Numerical analysis of stress distribution in neck area on specific implant was computed for static load equal to maximal load applied on implant. Subject of this paper is influence of implant geometry on stress distribution in neck area, thereby analysis was performed only for implant. Contact bone-implant was compensated with adequate boundary conditions. Material properties of selected implant were obtained from literature. Four numerical models were created in order to show how certain reductions of material influence on stress distribution in neck area of implant. The objective of this paper was to analyse these solutions. C3 - International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH 2017 T1 - Numerical Analysis Of Stress Distribution In Neck Area On Co Cr Alloy Total Hip Replacement Implant SP - 45 UR - https://hdl.handle.net/21.15107/rcub_machinery_6243 ER -
@conference{ author = "Milovanović, Aleksa and Sedmak, Aleksandar and Čolić, Katarina and Tatić, Uroš and Đorđević, Branislav", year = "2017", abstract = "Total hip replacement implants represent permanent implants, and require large bone and cartilage removal during implantation. Revision would affect joint capability to sustain load, which makes this procedure irreversible. During exploitation, i.e. everyday activities, implants are exposed to high influence of dynamic load, which will lead to failure of material by fatigue. Highest stress states on total hip replacement implants are present in neck area of implant, which is a position of crack initiation. Under loading neck area of implant contains tension and compression zones. Crack initiation on neck side under tension would lead to crack opening and certain fracture of the material. Implants are designed to reduce stress concentration on tension side of the neck and to create maximal stress concentration on compression side of the neck, where eventual crack would be pressed by material preventing its further propagation. Implants are examined with experimental and numerical methods. Most common numerical method is finite element method (FEM), used to simulate different loading conditions. Numerical analysis of stress distribution in neck area on specific implant was computed for static load equal to maximal load applied on implant. Subject of this paper is influence of implant geometry on stress distribution in neck area, thereby analysis was performed only for implant. Contact bone-implant was compensated with adequate boundary conditions. Material properties of selected implant were obtained from literature. Four numerical models were created in order to show how certain reductions of material influence on stress distribution in neck area of implant. The objective of this paper was to analyse these solutions.", journal = "International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH 2017", title = "Numerical Analysis Of Stress Distribution In Neck Area On Co Cr Alloy Total Hip Replacement Implant", pages = "45", url = "https://hdl.handle.net/21.15107/rcub_machinery_6243" }
Milovanović, A., Sedmak, A., Čolić, K., Tatić, U.,& Đorđević, B.. (2017). Numerical Analysis Of Stress Distribution In Neck Area On Co Cr Alloy Total Hip Replacement Implant. in International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH 2017, 45. https://hdl.handle.net/21.15107/rcub_machinery_6243
Milovanović A, Sedmak A, Čolić K, Tatić U, Đorđević B. Numerical Analysis Of Stress Distribution In Neck Area On Co Cr Alloy Total Hip Replacement Implant. in International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH 2017. 2017;:45. https://hdl.handle.net/21.15107/rcub_machinery_6243 .
Milovanović, Aleksa, Sedmak, Aleksandar, Čolić, Katarina, Tatić, Uroš, Đorđević, Branislav, "Numerical Analysis Of Stress Distribution In Neck Area On Co Cr Alloy Total Hip Replacement Implant" in International Conference of Experimental and Numerical Investigations and New Technologies“ CNN TECH 2017 (2017):45, https://hdl.handle.net/21.15107/rcub_machinery_6243 .