不同材料双极高频电刀热应力场的有限元分析
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1.上海理工大学;2.上海理工大学现代微创医疗器械及技术教育部工程研究中心

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TB333

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Finite Element Analysis of Thermal Stress Field for Bipolar High-frequency Electric Knife with Different Materials
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1.University of Shanghai for Science and Technology;2.Shanghai Institute for Minimally Invasive Therapy,University of Shanghai for Science and Technology

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    摘要:

    目的 分析不同材料对双极高频电刀热应力场的影响规律。方法 基于有限元分析软件ANSYS,对双极高频电刀工作过程中的热应力场进行了系统的电热耦合仿真分析,研究了4种不同绝缘层材料和4种不同电极材料对高频电刀的绝缘层、电极、涂层以及心肌组织热应力场及热形变量的影响规律。结果 对于304不锈钢、316不锈钢、317不锈钢和Ti6Al4V这4种材料而言,在连续通电2s的时间内,心肌组织的热形变量远高于高频电刀的各组成部件。从保护心肌组织的角度出发,选择304不锈钢作为双极高频电刀的电极材料最佳。对于PP、PA6、PC、ABS这4种材料而言,当绝缘层材料为PP时,心肌组织由热应力产生的热形变量最小,可以较好地保持组织的完整性。结论 高频电刀各组成部件的制作材料对其工作过程中的热应力场有重要影响,规律性分析结果可为高频电刀的研制提供指导。

    Abstract:

    Objective To analyze the influence of different materials on the thermal stress field of bipolar high-frequency electric knife. Methods Based on the ANSYS software, the electric-thermal coupling simulation analysis was performed for the thermal stress field of the bipolar high-frequency electric knife. The influence of 4 different insulating layer materials and 4 different electrode materials on the thermal stress field and thermal deformation field of insulating layer, electrode and coating of bipolar high-frequency electric knife and myocardial tissue were researched. Results For the 304 stainless steel, 316 stainless steel, 317 stainless steel and Ti6Al4V, the thermal deformation of myocardial tissue is much higher than that of the components of high-frequency electric knife in 2s for continuous power. From the point of view of protection myocardial tissue, 304 stainless steel is the best electrode material for high-frequency electric knife. For the four kinds of insulating materials of PP, PA6, PC and ABS, the thermal deformation of myocardial tissue caused by thermal stress is the smallest for PP, which can better maintain the integrity of tissue. Conclusions The manufacturing materials of high-frequency electric knife have an important influence on the thermal stress field in the working process. The regular analysis results can provide guidance for the development of high-frequency electric knife.

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  • 收稿日期:2020-03-10
  • 最后修改日期:2020-04-22
  • 录用日期:2020-04-23
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