Abstract
The GFRP fastening devices are presumably effective to prevent from not only abrasion of resin but also relaxing axial tension of fastening bolts. Ground coils are applied a certain type of stress, for example electromagnetic stress, thermal stress, fastening stress, residual stress and foreign substances impact stress. We describe about the strength evaluation test results for the PLG ground coil with GFRP fastening devices on the point of the stress which caused by the electromagnetic force, thermal expansion and fastening deformation.
