Transcription of AdvancedBoltTorqueAuditYields Bolt Tension Data
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AdvancedBoltTorqueAuditYields Bolt Tension Data
Gin and analysis of the torque-angle signature to de-termine the elastic tightening angle of turn. The angulardisplacement (turn) of the fastener stretches the boltand compresses the parts being clamped. The elasticclamping region of the torque-angle signature is theregion where clamping force is directly proportional tothe angle of turn from the elastic origin. The elastic origin is located by projection of thestraight-line portion of the signature curve backwardsto zero torque, or the prevailing torque level in the caseof thread locking interference type of principal can be observed when viewing a clampload-angle curve (see Figure 1). Once the curve be-comes linear, the clamp load will increase at a consis-tent rate with each angle of rotation. This remains trueuntil the curve stops being linear due to yielding of thefastener or the amount of preload in the joint determines howwell the joint will function when it experiences workingloads.
gin” and analysis of the torque-angle signature to de-termine the elastic tightening angle of turn. The angular displacement (turn) of the fastener stretches the bolt
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