A computational analysis of the scarf angle on a composites repair

Title & Authors
A computational analysis of the scarf angle on a composites repair
Kim, Yun-Hae; Jo, Young-Dae; Murakami, Ri-Ichi;

Abstract
This study examined the relationship between the scarf angle and stress distribution, and estimated the strength recovery via a finite element analysis. The following conclusions were drawn from this study. Resin will fracture due to a tensile load with a high scarf angle, which is similar to the patch repair method. An applied stress can be loaded to a repaired laminate if the scarf angle is $\small{5^{\circ}}$. The Von-Mises stress increases with decreasing scarf angle, with the exception of a scarf angle of $\small{30^{\circ}}$, where the scarf angle can indicate the rates of shear and normal stresses. Strength recovery can be better if the scarf angle is decreased to a lower angle. However, scarf machining requires more time, a high skill level and considerable expense. Therefore, a scarf angle of $\small{5^{\circ}}$ is the most effective for a repair. These results may provide a guide for engineers wishing to formulate a standard for repair. The scarf angle needs to be carefully managed for a more efficient composite repair.
Keywords
Composite repair;Finite element method;Scarf angle;Strength recovery;Sliding mode control;
Language
English
Cited by
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