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Analyzing the Mechanical Properties of Lead Cable used in Cardiac Pacemaker
Objectives: This work investigates the mechanical behaviour of lead cable used in cardiac pacemaker and comparing with theoretical values of equilibrium equations. Methods/Analysis: A pacemaker is a medical device which uses electrical impulses to regulate the heartbeat. The lead inside the pacemaker cable fails due to various reasons. One such reason is lead fracture which occurs long after the implantation procedure. The pacemaker is considered as a multi-layered assembly with 1+6+12 helical wires and a straight cylindrical core has been chosen for analysing the mechanical properties which plays an important role in the failure of the lead cable. Any lead cable which is considered as rope has general equations of equilibrium. The mechanical property involves tr and force, strand twisting moment, strand axial strain and contact stress. The same mechanical properties are found by writing programs in MATLAB. Findings: The study of mechanical properties of lead cable used in cardiac pacemaker is as same as possible with that of the values checked with the equations of equilibrium and the variations are also less than 2 percentage. Novelty/ Improvements: With the change in orientation of helix angle which is always assumed to be constant, is made as 82.53˚/-75.62˚, 73.29˚/62.36˚ and 62.24˚/-71.02˚. This change in orientation has made the better comparison of the mechanical properties of the lead cable used in cardiac pacemaker
Contact Stress, Cable Mechanics, Friction, Strand
- Xiang L, Wang HY, Chen Y, Guan YJ, Wang YL, Dai LH. Modeling of multi-strand wire ropes subjected to axial tension and torsion loads. International Journal of Solids and Structures. 2015 Apr; 58:233–46.Crossref
- Wang XY, Meng XB, Wang JX, Sun YH, Gao K. Mathematical modeling and geometric analysis for wire rope strands. Applied Mathematical Modelling. 2015 Feb; 39(3–4):1019–32.Crossref
- Love AEH. A treatise on the mathematical theory of elasticity. 4th edition. Dover Publishers, New York; 1944.
- Costello GA, Philips JW. A more exact theory for twisted wire cables. Journal of Engineering Mechanics. 1974; 100(5):1096–99.
- Costello GA, Phillips JW. Eff ective modulus of twisted wire cables. Journal of Engineering Mechanics. 1976; 102(1):171–81.
- Ramsey H. Analysis of interwire friction in multi-layered cable under uniform extension and twisting. International Journal of Mechanical Sciences. 1990; 32(8):709–16.Crossref
- Costello A. Th eory of wire rope. Mechanical Engineering Series, Springer Verlag, New York, Berlin Heidelberg; 1997.p. XV,123.
- Cardou A, Jolicoeur C. Mechanical models of helical strands. Applied Mechanics Reviews. 1997 Jan 1; 50(1):1–14.Crossref
- Gnanavel BK, Gopinath D, Parthasarathy NS. Effect of friction on coupled contact in a twisted wire cable. International Journal of Applied Mechanics. 2009; 77(2):1–6.
- Gnanavel BK, Parthasarathy NS. Effect of interfacial contact forces in radial contact wire strand. Archive of Applied Mechanics. 2011 Mar; 81(3):303–17.Crossref
- Gnanavel BK, Parthasarathy NS. Effect of interfacial contact forces in lateral contact wire strand. In the Proceedings of the World Congress on Engineering, London, UK. 2011; 3:1–7.
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