A puncture over a break is an open fracture until proven otherwise. 已经证实了骨折处的小孔是个张开性裂缝。
A numerical example reveals that strongly concentrated stresses and extremely intensified electric displacements near the electrode border are high enough to puncture or fracture the piezoelectric medium. 算例表明在电极边缘的邻域内存在剧烈的应力集中和电位移增强,足以造成介质的脆性断裂或介质击穿。