Study of Different Non-metallic Materials Fastening Torque Value

Analysis and research of screws fastening torque value,when fastened material is non-metallic,is focused on.Draw pressed fatigue curves of some non-metallic frequently used in electrical equipment,then max fastening torque value is calculated bases on relationship of screw fastening torque value and preload,,safety fastening torque value is calculated with a safety factor,the fastening torque value can be referenced in engineering applications.