Dynamic Fracture Toughness of Piezoelectric Ceramics
Dynamic Fracture Toughness of Piezoelectric Ceramics
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DOI：
10.1111/jace.12426
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发表时间：
2013-07
影响因子：
3.9
通讯作者：
Chen Hao-sen;Yu Xia;Guo Yazhou;F. Daining
中科院分区：
文献类型：
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作者：
Chen Hao-sen;Yu Xia;Guo Yazhou;F. Daining
对32个压电陶瓷样品在四个不同极化方向上进行了动态和静态三点弯曲断裂试验。采用改进的分离式霍普金森压杆法和基于聚偏氟乙烯（PVDF）的压力计进行了动态实验。加载速率对断裂韧度的影响主要表现在两个方面：动态断裂韧度值远高于静态断裂韧度值;极化方向对动态断裂韧度的影响不像静态断裂韧度那样明显。
Both dynamic and static three-point bending fracture testings of 32 piezoelectric ceramic samples were performed in four different poling directions. A modified split Hopkinson pressure bar method with a polyvinylidene fluoride (PVDF)-based gauge was utilized for the dynamic experiments. The loading rate greatly influenced the fracture toughness in two ways: the dynamic fracture toughness values were much higher than those of the static fracture toughness, and unlike the static fracture toughness, the influence of poling direction on the dynamic fracture toughness was not obvious.