Development of a micromechanical continuum damage model of ferroelectric ceramics for the prediction of lifetime at cyclic loading

开发铁电陶瓷的微机械连续损伤模型，用于预测循环负载下的寿命

• 批准号: 194824543
• 负责人: Professor Dr.-Ing. Andreas Ricoeur
• 金额: --
• 依托单位: Fachgebiet Technische Mechanik/Kontinuumsmechanik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/194824543?language=en
• 关键词: Development; micromechanical; continuum; damage; model

Most ferroelectric multifunctional materials are brittle ceramics, which are predominantly applied in actuators and sensors. There, they are supposed to sustain many millions of load cycles without failure and fracture. Models are developed to understand the parameters influencing damage, and finally to optimize actuatoric devices with respect to their lifetime. They enable predictions of both damage processes and functional properties. Based on calculations and computer simulations, mechanisms of damage are investigated and measures are elaborated increasing life time without deteriorating the actuatoric properties.

大多数铁电多功能材料是脆性陶瓷，主要应用于执行器和传感器。在那里，它们应该能够承受数百万次载荷循环，而不会出现故障和断裂。建立模型是为了了解影响损伤的参数，最终根据致动器的寿命对其进行优化。它们使损伤过程和功能特性的预测成为可能。在计算和计算机模拟的基础上，对损伤机理进行了研究，并阐述了在不降低致动性能的情况下延长寿命的措施。

项目成果

Influence of inclined electric fields on the effective fracture toughness of piezoelectric ceramics

• DOI: 10.1007/s00707-014-1190-5
• 发表时间: 2015-02
• 期刊: Acta Mechanica
• 影响因子: 2.7
• 作者: A. Ricoeur;R. Gellmann;Zhibin Wang

High cycle fatigue damage and life time prediction for tetragonal ferroelectrics under electromechanical loading

机电载荷下四方铁电体的高周疲劳损伤和寿命预测

• DOI: 10.1016/j.ijsolstr.2015.11.003
• 发表时间: 2016
• 期刊: International Journal of Solids and Structures
• 影响因子: 3.6
• 作者: S. Lange;A. Ricoeur
• 通讯作者: A. Ricoeur

Continuum damage model for ferroelectric materials and its application to multilayer actuators

• DOI: 10.1088/0964-1726/25/5/055045
• 发表时间: 2016-04
• 期刊: Smart Materials and Structures
• 影响因子: 4.1
• 作者: R. Gellmann;A. Ricoeur

Effective properties of cracked piezoelectrics with non-trivial crack face boundary conditions

具有非平凡裂纹面边界条件的裂纹压电体的有效特性

• DOI: 10.1007/s00419-016-1118-8
• 发表时间: 2016
• 期刊: Archive of Applied Mechanics
• 影响因子: 2.8
• 作者: E. Merkel;A. Ricoeur
• 通讯作者: A. Ricoeur