Analysis of Cutout Fiber as Source of Delamination in Composites System Using FEM  

作　　者：Ramadan A. Al-Madani Aimen. Elmahmody M. Jamaz 

机构地区：[1]Engineering Faculty, Al-Jabel Algharbi University, Gharian 00218, Libya [2]Engineering Faculty, Tripoli University, Tripoli 00218, Libya [3]Academy of Graduate Studies, Tripoli 00218, Libya

出　　处：《Journal of Chemistry and Chemical Engineering》2013年第1期34-39,共6页化学与化工（英文版）

摘　　要：Delamination in composite structures can be a serious threat to the safety of the structure. Delamination leads to loss of stiffness and strength of laminates under some conditions. This is particularly so in the case of compressively loaded structures as the loss of stiffness may lead to separation of layers, the consequences of which can be catastrophic. Causes of delamination are many. In aerospace applications, this includes manufacturing defects, as well as operationally induced defects such as bird strikes, hits due to runway debris and tool drops. In this work one of the main causes of delamination that is dealt with, is the one that redistribution of the stress state due to some defects all mostly like here is broken single fiber （cutout fiber） in composite system already initiated by one of the above causes. When a laminate is subjected to in-plane tension, the effects of delamination on the stiffness and strength may be characterized by analytical results concerning the onset of delamination growth and its subsequent development. Many of the analytical treatments deal with just free-edge delamination. In mean time the redistribution and the gradient of the stress state in composite system is playing an important role for causing delamination. The main task of this work is to analyze single fiber with and without cutout embedded in matrix. Different FE models were generated, from the results, the redistribution of the stress state around the defected fiber were presented and discussed. Finally concluded remarks were indicated.

关 键 词：Composite materials interlaminar stress delamination. 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术] N94[自动化与计算机技术—计算机科学与技术]