균열선단 주위의 구멍이 동적응력확대계수에 미치는 영향

초록

In this study, the effect of the holes around a crack tip on the dynamic stress intensity factor(KI(t)) was investigated by using a numerical method. To illustrate the appearance of propagating stress wave, we applied the numerical analysis program, using the bicharacteristic method and approved ifself on several inspection. The investigation was carried out in three cases:(1) changing the distance of the crack tip and the holes, (2) changing the angles of the holes with respect to the crack tip, (3) changing the diameters of holes. As a result, the variation of KI(t) with respect to the time was studied in detail.