摘要
为了研究螺栓连接结构静强度渐进破坏特点,应用Global/Local有限元分析技术,分两级建立了螺栓连接结构有限元模型,并对其进行了带EWK断裂子程序的材料/几何非线性有限元分析。结果表明:螺栓连接结构的断裂部位位于螺栓孔边缘,当加载到最大载荷的42%时开始出现破坏单元,在加载到最大载荷的48%之前裂纹扩展是一个稳态的过程,之后便迅速扩展直至整体结构失效。Global/Local分析技术提高了整个过程的分析效率。
To simulate the progressive fracture of the bolted structure, a Global/Local analysis strategy is used. In both Global and Local coordinates, the nonlinear finite element analysis with EWK fracture subroutine is carried out. The result shows that the dangerous zone is located near the edge of the bolt hole. Failure element begins to appear when the applied load is up to 42%of the maximal load, then the crack spreads stablely along the circle of the bolt hole edge till the applied load reaches 48 % of the maxi- mal load. The crack spreads instantly afterward, thus leading to the collapse of the whole structure. The Global/Local analysis strategy can improve the efficiency of the entire analysis process.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2010年第3期318-321,共4页
Journal of Nanjing University of Aeronautics & Astronautics
