Development of the method of specific volume electrical resistance measurement for semi-conductive materials and testing semi-conductive fiberglass epoxy composites under simultaneous action of vibration and electrical current load

A method of electrical volume resistance measurement of semiconductive plane-parallel materials-specific volume resistance in perpendicular plane direction for materials and production units without removing specimens from tested material, or damaging test material was developed. This method allows control of specific volume resistance of 100% materials and units with high accuracy during production, during long-term testing and before using. This method was applied during the process of evaluating changes of mechanical and electrical properties of semi-conducting materials as well as evaluating equipment reliability on long-term aging.