Analysis and assessment of the laminate free-edge effect by means of the scaled boundary finite element method

缩放边界有限元法分析和评估层合板自由边缘效应

• 批准号: 321093336
• 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: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/321093336?language=en
• 关键词: Analysis; assessment; laminate; free; edge

It is a goal of the currently intended new research project to formulate and generate a specially adapted version of the scaled boundary finite element method as a semi-analytical tool for the analysis of the laminate free-edge effect. It is expected that this tool will reveal and descibe the occuring free-edge stress singularities and also the behaviour of all relevant field quantities with high precision and efficiency. It can also be expected that a relatively coarse boundary discretization will be sufficient which in comparison to the standard finite element method means an advantageously low number of degrees of freedom. Another goal of the intended research project is the assessment of the given structural situation in regard of a potential free-edge delamination in the framework of finite fracture mechanics. This assessment can be implemented in a very advantageous manner by shifting the scaling center to the location of the fictitious delamination front, calculation of the corresponding incremental energy release rate by a respective crack closure integral and eventually by use of a hybrid failure criterion in the sense of Leguillon.

它是当前预期的新研究项目的一个目标，旨在制定并生成特殊改编的缩放边界有限元方法，作为分析层压板自由边缘效应的半分析工具。可以预期，该工具将揭示和降低发生自由边缘应力奇点，以及所有相关野外量的行为，并具有很高的精度和效率。还可以预期，相对粗糙的边界离散化将足够，与标准有限元方法相比，这意味着自由度的数量非常低。预期研究项目的另一个目标是评估在有限断裂力学框架中潜在的自由边缘分层的给定结构情况。可以通过将缩放中心转移到虚拟的分层阵线的位置，通过各自的裂纹闭合积分来计算相应的增量能量释放速率，并最终通过使用Leguillon的感觉来计算相应的增量能量释放速率，以计算相应的增量能量释放速率，从而以非常有利的方式实施此评估。

项目成果

Investigation of the laminate free‐edge effect by means of the scaled boundary finite element method

通过缩放边界有限元法研究层合板自由边缘效应

• DOI: 10.1002/pamm.201800129
• 发表时间: 2018
• 期刊: PAMM
• 作者: Dölling;Becker
• 通讯作者: Becker