Discrimination of surface tracking patterns of gamma irradiated polymers using fractals

Bulletin of materials science

V Rajini¹  K Udaya Kumar² 

[1] Department of Electrical Engineering, S.S.N. College of Engineering, Kalavakkam 603 110, India$$Department of Electrical Engineering, S.S.N. College of Engineering, Kalavakkam 603 110, IndiaDepartment of Electrical Engineering, S.S.N. College of Engineering, Kalavakkam 603 110, India$$;Department of High Voltage Engineering, College of Engineering Guindy, Chennai 600 005, India$$Department of High Voltage Engineering, College of Engineering Guindy, Chennai 600 005, IndiaDepartment of High Voltage Engineering, College of Engineering Guindy, Chennai 600 005, India$$

关键词: Ethylene propylene diene monomer;    surface tracking;    fractal dimensions;    box counting;    IEC-587 inclined plane test.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The purpose of this paper is to evaluate the radiation resistance of gamma irradiated ethylene propylene diene monomer (EPDM) and to identify the pattern discriminating abilities of the surface tracking patterns. Simple objects can be described by the ideal shape primitives such as cubes, cones and cylinders. But most of the natural objects are so complex that cannot be described in terms of simple primitives. Fractals have been very successfully used to address the problem of modeling and to provide a description of naturally occurring phenomena and shapes, wherein conventional and existing mathematical models were found to be inadequate. The geometrical patterns of dielectric breakdown like electrical trees, surface discharges, and lightning are known to be of fractal in nature. These fractal patterns can be analysed numerically using fractal dimensions and lacunarity. Surface tracking occurring in HV insulation systems is a very complex phenomenon and more so are the shapes of tracking patterns. It has been fairly well established that the shapes and the underlying parameters causing tracking have a 1 : 1 correspondence and therefore, methods to describe and quantify these patterns must be explored. This paper reports preliminary results of such a study wherein 2-�?? tracking patterns of gamma irradiated ethylene propylene diene monomer were analysed and found to possess fairly reasonable pattern discriminating abilities. This approach appears promising and further research is essential before any long-term predictions can be made.

【 授权许可】

Unknown