Development of a Reliability-Based Design Approach for Unstiffened CFRP-Cylinders under Material and Structural Uncertainties

材料和结构不确定性下非加固 CFRP 圆柱体基于可靠性的设计方法的开发

• 批准号: 353469698
• 负责人: Professor Dr.-Ing. Dieter Krause
• 金额: --
• 依托单位: Institut für Produktentwicklung und Konstruktionstechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/353469698?language=en
• 关键词: Development; Reliability; Based; Design; Approach

Unstiffened CFRP-Cylinders are interesting structural components forapplications with extreme requirements. For these thin lightweightstructures the critical failure occurs as buckling. The prediction of thecritical buckling load is determined by deterministic design proceduresusing empirical knock-down factors. However these are mostly basedupon tests of metal structures with different boundary conditions. Theresulting knock-down factors happen to be very conservative for thedesign of CFRP-Cylinders. In this research project the statisticaldatabase of experimental results shall be expanded for representativestructural components. Different measurements techniques areapplied to characterize the cylinders and to determine the materialand structural uncertainties. In addition to existing literature theexperimental results shall be classified into categories. Building on theInstitutes previous work and with the results of this project a reliabilitybaseddesign approach for unstiffened CFRP-Cylinders shall befurther developed with respect to structural and material uncertainties.

未固定的CFRP缸是有趣的结构组件，具有极端要求。对于这些薄轻质结构，重大故障是屈曲。 thecition屈曲负荷的预测是通过确定性设计程序确定的，其经验敲低因素。但是，这些主要是基于不同边界条件的金属结构的测试。对于CFRP缸体的theSign而言，击倒因素恰好是非常保守的。在该研究项目中，应扩展实验结果的统计数据以代表性造影组件。区域的不同测量技术以表征圆柱体并确定材料和结构不确定性。除了现有文献外，还应将实验结果分为类别。以先前的工作为基础，并在该项目的结果下进行了可靠性的限制方法，用于未经安装的CFRP缸系，应就结构和物质不确定性开发。

项目成果

Transferability of Boundary Conditions in Testing and Validation of Lightweight Structures

轻质结构测试和验证中边界条件的可传递性

• DOI: 10.35199/dfx2019.8
• 发表时间: 2019
• 期刊: DFX 2019: Proceedings of the 30th Symposium Design for X, 18-19 September 2019, Jesteburg, Germany
• 作者: Heyden;Hartwich;Schwenke;Krause
• 通讯作者: Krause