Simulation of Fastener Pull-through Failure for Honeycomb Sandwich Structures with Inserts

2nd International Conference on Manufacturing Technologies

Zhongqiang, Chen^1 ; Lei, Lei^1 ; Yong, Wang^1

Aerospace System Engineering Shanghai, China^1

关键词: Carbon fiber reinforced composite;    Fastener pull-through;    Finite element codes;    Honeycomb sandwich structure;    Local reinforcements;    Parametric fitting;    Stiffness degradation;    Stress redistribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/398/1/012034/pdf
DOI  :  10.1088/1757-899X/398/1/012034

来源: IOP

【 摘 要 】

Honeycomb sandwich structures are commonly assembled using a local reinforcement called "inserts" at the junction. In this paper, fastener pull-through tests are firstly conducted to investigate the strength properties and failure process of Nomex honeycomb sandwich structures with carbon fiber-reinforced composite skins and inserts. Loading capability and failure modes are analyzed and discussed. Based on these experiments, an analytical model simulating the failure process is then developed and implemented using the finite element code ANSYS, and a degradation model is proposed for the stress redistribution analysis. The database for determining the stiffness degradation factors Di of the honeycomb core is established by means of parametric fitting. The simulated results of the fastener pull-through failure process are will coincided with experimental results.