Health assessment of smart patches on hygrothermalpiezoelectric lightweight structures

湿热压电轻质结构智能贴片的健康评估

• 批准号: 277522030
• 负责人: Professor Dr.-Ing. Wilfried Becker
• 金额: --
• 依托单位: Fachgebiet Strukturmechanik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/277522030?language=en
• 关键词: Health; assessment; smart; patches; hygrothermalpiezoelectric

The aim of the proposed research work is to quantify the effect of electrical and static load, temperature and moisture as well on the interface delamination of a basic structural layer with a patch (disposed up on the layer) as a part of energy industrial devices, or to consider the health assessment of a smart lightweight structure with repairing function in automotive and aircraft industries or a basic element in solar panels. Moreover the considered configuration will allow the selection of a criterion for the clear connection between electric gradient and interface debond length. On this basis it makes reason to choose the optimal geometry, material and physical properties and loading by means of a genetic algorithm to estimate its reliability.The novelty of the project is in development of an efficient package of knowledge including (a) mechanical models, analytical solutions and their interpretations; (b) creating the Fortran programs for the calculation of the interface debond lengths for the health assessment of the smart lightweight structure, consisting in a hygrothermalpiezoelectric layer with one patch under combined mechanical and physical load or using Mathematica, MATCAD, etc.; (c) a possible criterion for detecting interface debond length, (d) optimal choice of geometry and material characteristics on the basis of genetic algorithm in regard of the reliability of the structure considered.

拟议研究工作的目的是量化电气和静态负载、温度和湿度以及作为能源工业设备一部分的带有补片（设置在该层上）的基本结构层的界面分层的影响，或者考虑对汽车和飞机工业中具有修复功能的智能轻质结构或太阳能电池板中的基本元件进行健康评估。此外，所考虑的配置将允许选择电场梯度和界面脱粘长度之间明确联系的标准。在此基础上，通过遗传算法来选择最佳几何形状、材料和物理特性以及载荷来估计其可靠性。该项目的新颖之处在于开发了一套有效的知识，包括（a）机械模型、分析解决方案及其解释； (b) 创建 Fortran 程序，用于计算界面脱粘长度，以对智能轻质结构进行健康评估，该结构由湿热压电层组成，在机械和物理载荷联合作用下或使用 Mathematica、MATCAD 等； (c) 检测界面脱粘长度的可能标准， (d) 考虑到所考虑结构的可靠性，基于遗传算法对几何形状和材料特性进行最佳选择。