Abstract
The glass fiber reinforced epoxy resin composites play an important role in superconducting Tokamak, which are used to insulate the metal components, such as superconducting winding, cooling pipes, metal electrodes and so on. For the components made of metal and glass fiber reinforced epoxy resin composites, thermal shrinkage leads to non-ignorable thermal stress, therefore, much attention should be paid on the thermal shrinkage rate of glass fiber reinforced epoxy resin composites. The structural design of glass fiber reinforced epoxy resin composites should aim at reducing thermal stress. In this paper, the density, glass fiber content and thermal shrinkage rate of five insulation tubes were tested. The testing results will be applied in structural design and mechanical analysis of isolators for superconducting Tokamak.
Highlights
In superconducting Tokamak, cryogenic temperature insulating materials were widely used in super-conducting magnets system, such as superconducting magnets, high temperature superconducting current leads and feeders (Canfer et al 2011, 2013; Bondarenko et al 2009; Hemmi et al 2009; Usami et al 1999; Li et al 2014; Ivanov et al 2012; Humer et al 2013; Glukhikh et al 2000; Bursikov et al 2014)
Compared with insulating materials used in room temperature, the cryogenic temperature resistant insulating materials were fabricated in room temperature but used in cryogenic temperature, such as 77, 4.2, 1.8 K and so on
The density of specimen wound by glass fiber tape is lower, which corresponds to higher resin content
Summary
In superconducting Tokamak, cryogenic temperature insulating materials were widely used in super-conducting magnets system, such as superconducting magnets, high temperature superconducting current leads and feeders (Canfer et al 2011, 2013; Bondarenko et al 2009; Hemmi et al 2009; Usami et al 1999; Li et al 2014; Ivanov et al 2012; Humer et al 2013; Glukhikh et al 2000; Bursikov et al 2014). To reveal the influence of different winding process parameters on the density, void ratio and thermal shrinkage rate of glass fiber reinforced epoxy resin composites, five insulation tube specimens were manufactured with R glass fiber reinforced DWZ epoxy resin composites involving different winding process parameters, such as glass fiber pattern, glass fiber geometry, glass fiber angle, curing temperature and curing time.
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