Testing was conducted to determine torque-tension relationship for self-locking nuts. The test results indicated that torque wrench method is not accurate for determining preload when fasteners are preloaded to 75-80 percent of their ultimate tensile strength. The accuracy of torque wrench method deteriroates even more if fasteners are used for more than one cycle application. There was also significant difference in preload between all metal nuts and nuts with nonmetallic insert. The fastener preload variation decreased with larger fasteners.
Effect of self-locking nuts on torque-tension relationship
Wirkung selbstsichernder Muttern auf Verhaeltnis von Drehmoment und Spannung
US Government Reports ; 1-76
1975
76 Seiten
Report
Englisch
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