Apparatus and method for attaching a load indicating device...

G - Physics – 01 – L

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G01L 11/00 (2006.01) G01L 5/24 (2006.01)

Patent

CA 2325557

A method and apparatus for attaching a load-indicating device to a fastener so that the accuracy of the load-indicating device is not affected by yielding and non-uniform elastic deformation of the fastener. The apparatus is attached to the fastener in a region of the fastener which is not likely to yield or elastic deform in a non-uniform manner when the fastener is loaded. The region may be determined using finite element analysis, physical experimentation or other means such as by mathematical computation. By securing the load- indicating device in such a manner, the device is not affected by yielding or non-uniform deformation of the fastener, cyclic loading, shock or thermal expansion.

La présente invention concerne un procédé et un appareil permettant de fixer un indicateur de charge à un élément de boulonnerie pour éviter que la précision de l'indicateur de charge ne soit affectée par le fléchissement et la déformation élastique non uniforme du boulon. Cet appareil est fixé sur une surface du boulon qui n'est pas susceptible de fléchir ou de se déformer de façon élastique non uniforme lorsque l'élément de boulonnerie est chargé. On peut déterminer cette surface en utilisant une analyse d'éléments finis, une expérimentation physique ou d'autres moyens tels que le calcul mathématique. En fixant l'indicateur de charge de cette façon, celui-ci n'est pas affecté par le fléchissement ou la déformation non uniforme de l'élément de boulonnerie, par la charge cyclique, ou l'expansion par le choc ou la chaleur.

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