クラックアレスターとストップホールを用いた平板試験片のき裂進展抑制について

抄録

Some simple technical methods for arresting crack growth have been proposed to prevent the fatigue failure of machinery. Drilling a stop-hole at the crack tip and attaching a patch at crack sites are typical methods for arresting crack growth. In this study, in addition to the drilling of a stop-hole, a crack arrester was attached across the crack to extend the fatigue life. In particular, a plate specimen having portions with different thicknesses was used in a push-pull test, and three types of crack arresters were prepared. The effect of the crack arrester on the prevention of crack growth when a crack is initiated in plates with different thicknesses was considered.