Meagher J M, Altman P
Department of Mechanical Engineering, California Polytechnic State University, San Luis Obispo 93407, USA.
Med Eng Phys. 1997 Oct;19(7):668-73. doi: 10.1016/s1350-4533(96)00022-7.
This study presents a theoretical model of the general stress state found in helical implantable leads in bending. The model accurately predicts stress in large filarity coils made from clad wire. The stress is predicted using flexural rigidity of the coil and is developed to include the effects of coil pitch and the relative amounts and composition of the coil materials. The results is verified using finite element models of coils made from MP35N wire and MP35N clad silver wire. The resulting model will be especially useful for the fatigue analysis and engineering design of implantable leads which are built in this manner.
本研究提出了一种在弯曲状态下螺旋可植入导线中一般应力状态的理论模型。该模型能准确预测由包层线制成的大丝径线圈中的应力。通过线圈的抗弯刚度来预测应力，并进一步考虑了线圈节距以及线圈材料的相对数量和成分的影响。使用由MP35N线和MP35N包银线制成的线圈的有限元模型对结果进行了验证。所得模型对于以此方式制造的可植入导线的疲劳分析和工程设计将特别有用。
