Combined electromechanical dynamic fracture behavior of lead zirconate titanate (PZT)
Combined electromechanical dynamic fracture behavior of lead zirconate titanate (PZT)
复制标题
锆钛酸铅（PZT）的复合机电动态断裂行为
DOI：
10.1111/jace.18279
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发表时间：
2022
影响因子：
3.9
通讯作者：
Lamberson, Leslie
中科院分区：
文献类型：
--
作者：
Mendoza, Isabella;Drury, Daniel;Koumlis, Stylianos;Ivy, Jacob;Brennecka, Geoff;Lamberson, Leslie
对极化和去极化的锆钛酸铅（PZT）试样在应力波和电载荷联合作用下进行了测试。使用高速成像和二维数字图像相关性检查I型裂纹萌生和断裂行为。动态临界应力强度因子（）提取使用测量的位移场前面的脉冲加载裂纹尖端，并比较极化和去极化的板，无论是在没有电场，正0.46 kV/mm的电场，或负0.46 kV/mm的电场。极化试样的极化方向和施加的电场方向垂直于裂纹前缘。电场的加入导致裂纹增强效应，其中极化试样在0.46 kV/mm下的动态断裂韧性几乎是没有电场的试样的一半。除极样品经历了几乎没有变化的动态断裂韧性与电场的增加。
Coupon specimens of poled and depoled lead zirconate titanate (PZT) are examined under combined stress wave and electric loading conditions. Mode‐I crack initiation and fracture behavior is examined using ultrahigh‐speed imaging and two‐dimensional digital image correlation. The dynamic critical stress intensity factor () is extracted using measured displacement fields ahead of the impulsively loaded crack tip, and compared between poled and depoled plates that were either under no electric field, positive 0.46 kV/mm electric field, or negative 0.46 kV/mm electric field. Poled specimens had a poling direction and applied electric field direction normal to the crack front. The addition of an electric field resulted in a crack‐enhancing effect, where the dynamic fracture toughness of poled specimens under 0.46 kV/mm was almost half that of samples with no electric field. Depoled samples experienced almost no change in dynamic fracture toughness with the addition of an electric field.