Characterization of Electric Fracture and Deformation Behavior of Advanced Piezoelectric Material Systems

先进压电材料系统的电断裂和变形行为表征

• 批准号: 11450040
• 负责人: SHINDO Yasuhide
• 金额: $ 8.77万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450040/
• 关键词: Elasticity; Electric Fracture Mechanics; Integral Transforms; Finite Element Analysis; Material Testing; Piezoelectric Ceramics; Electro-Elastic Interaction; Smart and Electronic Material Systems; 弾性; 電子・電気機械デバイス

In most of the applications as sensors and actuators in ffie field of smart structures and devices, piezoelectric materials are subjected to both high mechanical stresses and intense electric fields, hence, it is important for reliability and durability to investigate the fracture and deformation behavior of piezoelectric materials under mechanical and electrical loads. In this research project, the electric fracture and deformation behavior of advanced piezoelectric material systems is investigated. From the theoretical considerations and experimental data for piezoelectric material systems, the following results can be obtained :1. We analyze the linear electroelastic problems for cracked piezoelectric ceramics. The effects of electroelastic interactions and piezoelectric properties on the fracture mechanics parameters (stress intensity factor, energy release rate, energy density, fatigue crack growth rate) are calculated. We also discuss the electrical boundary condition along the c … More rack faces.2. (a) We consider the multiple scatterlng of antiplane shear waves in a piezoelectric fibrous composite with slip at interfaces. Numerical calculations for some piezoelectric fibrous composites are obtained and the effects of interfacial slippages and electroelastic interactions on the phase velocity and attenuation of coherent plane wave, and the effective piezoelectrically stiffened elastic constant are discussed. We also analyze the dynamic electroelastic problem for a piezoelectric ceramic having a circular piezoelectric inclusion. Numerical results for the dynamic stress and electric field concentrations are computed, and they are plotted in terms of the piezoelectric material constants, frequency, and applied electric field. (b) We consider the problem of horizontally polarized shear waves scattered from arc-shaped interface cracks between a circular piezoelectric fiber and its surrounding elastic matrix. Numerical values on the dynamic stress intensity factor, dynamic energy release rate, scattering cross section and electrical signal are obtained and the results are presented graphically to display the electroelastic interactions.3. We perform the indentation fracture (IF) and single-edge precracked beam (SEPB) tests on piezoelectric ceramics, and examine the influence of applied electric field on the fracture and deformation properties. We also employ the finite element analyses to calculate the stress intensity factor and energy release rate. The numerical findings are then correlated with the experimental results.4. We perform the modified small punch (MSP) tests on piezoelectric ceramics, and obtain the fracture initiation loads under different electric fields. We also model the electromechanical response of piezoelectric ceramics under mechanical and electric fields using a finite element approach, and calculate the deflection and critical MSP energy. Attempts are made to compare the results of finite element analysis with experimental observations. Less

在智能结构和设备领域作为传感器和执行器的大多数应用中，压电材料同时承受高机械应力和强电场，因此，研究压电材料的断裂和变形行为对于可靠性和耐用性非常重要在本研究项目中，从压电材料系统的理论考虑和实验数据出发，研究了先进压电材料系统的电断裂和变形行为，我们得到了以下结果： 1．线性裂纹压电陶瓷的电弹性问题。我们还计算了电弹性相互作用和压电特性对断裂力学参数（应力强度因子、能量释放速率、能量密度、疲劳裂纹扩展速率）的影响。 …更多齿条面。2。（a）我们考虑了界面滑移的压电纤维复合材料中反平面剪切波的多次散射，并获得了一些压电纤维复合材料的数值计算结果。讨论了界面滑移和电弹性相互作用对相干平面波的相速度和衰减的影响，以及有效压电硬化弹性常数，我们还分析了具有圆形压电夹杂物的压电陶瓷的动态电弹性问题。 (b) 我们考虑水平偏振剪切波散射的问题从圆形压电纤维与其周围弹性基体之间的弧形界面裂纹中获得动态应力强度因子、动态能量释放率、散射截面和电信号的数值，并将结果以图形方式显示。电弹性相互作用.3.我们对压电陶瓷进行了压痕断裂（IF）和单边预裂梁（SEPB）测试，并检查了施加电场对断裂和变形性能的影响。计算应力强度因子和能量释放率，然后将数值结果与实验结果相关联。4．我们对压电陶瓷进行了改进的小冲头（MSP）测试，并获得了不同电场下的断裂起始载荷。还使用有限元方法对压电陶瓷在机械和电场下的机电响应进行了建模，并计算了挠度和临界 MSP 能量，并尝试将有限元分析的结果与实验观察结果进行比较。

项目成果

Y.Shindo: "Analysis and Testing of Indentation Fracture Behavior of Piezoelectric Ceramics Under an Electric Field"ASME Journal of Engineering Materials and Technology. 123.2. 293-300 (2001)

Y.Shindo：“电场下压电陶瓷压痕断裂行为的分析和测试”ASME 工程材料与技术杂志。

Y.Shindo: "Analytical and Experimental Evaluation of Single-Edge Precracked Beam Specimens of Piezoelectric Ceramics"Role of Mechanics for Development of Science and Technology. 863-872 (2000)

Y.Shindo：“压电陶瓷单边预裂梁试样的分析和实验评估”力学对科学技术发展的作用。

Y. Shindo: "Electroelastic Analysis of a Piezoelectric Ceramic Strip with a Central Crack"International Journal of Engineering Science. 38-l. 1-19 (2000)

Y. Shindo：“具有中心裂纹的压电陶瓷条的电弹性分析”国际工程科学杂志。

Y.Shindo: "Scattering of Antiplane Shear Waves From a Partially Debonded Piezoelectric Fiber"Theoretical and Applied Mechanics. 50. 183-191 (2001)

Y.Shindo：“部分脱粘压电纤维的反平面剪切波的散射”理论和应用力学。

F.Narita: "The Interface Crack Problem for Bonded Piezoelectric and Orthotropic Layers under Antiplane Shear Loading"International Journal of Fracture. 98・1. 87-101 (1999)

F.Narita：“反平面剪切载荷下粘合压电层和正交各向异性层的界面裂纹问题”国际断裂杂志 98・1 (1999)。