Bruchmechanische Untersuchung geschichteter Piezoelektrika unter dynamischer Belastung mit Hilfe von Randelementmethoden

使用边界元方法研究动态载荷下层状压电体的断裂力学

• 批准号: 5346887
• 负责人: Professor Dr.-Ing. Dietmar Gross
• 金额: --
• 依托单位: Institute of Mechanics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2001
• 资助国家: 德国
• 起止时间: 2000-12-31 至 2004-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5346887?language=en
• 关键词: Bruchmechanische; Untersuchung; geschichteter; Piezoelektrika; unter

The proposal is motivated by the dynamic fracture processes evaluation in piezoelectric materials (PEM) with consideration of the coupled mechanical and electric effects. This analyze will be in help to improve the perfomance and to predict the reliable service lifetime of piezoelectric components. The aim of the proposal is a creation of an efficient BIEM numerical tool for solution of 2D electromechanical-coupled dynamic problem for a finite cracked multilayered piezoeletric body. The solution method is the extended BIEM for the coupled electromechanical dynamic problem. The accuracy of the proposed method will be studied by a solution of appropriate test examples. The crack-tip modeling and calculation of the extended SIF will be done. Parametric study results revealing the sensitivity of the extended fracture field on the dynamic parameters of the different time-harmonic and transient coupled loads will be obtained.

该建议的动机是在压电材料（PEM）的动态断裂过程评估与考虑耦合的机械和电气效应。这一分析将有助于提高压电元件的性能和预测其可靠使用寿命。该建议的目的是创建一个有效的BIEM数值工具，用于解决有限裂纹多层压电体的二维机电耦合动力学问题。求解方法是机电耦合动力学问题的扩展边界元法。所提出的方法的准确性将通过适当的测试示例的解决方案进行研究。对扩展应力强度因子进行了裂纹尖端建模和计算。参数研究结果揭示了扩展断裂场对不同时间谐波和瞬态耦合载荷的动态参数的敏感性。