Abstract
When fixing a structure using bolts, it is crucial to apply sufficient bolt axial force. Hence, several methods have been proposed to measure the applied axial force exerted on the bolt. However, these methods are either expensive or complicated. To overcome these problems, we proposed a method to measure the axial force by analyzing the change in shape of the washer. The basic shape of the washer was designed using a commercial software and redesigned into the most robust form according to the change in tolerance while measuring a force of 200 kN. To achieve this, the sensitivity and interaction of each parameter was examined to determine the appropriate parameter values. The adequacy of the final model was verified using the additive model and Monte Carlo method. The result s proved that the proposed model had high reliability and robustness.
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