Progressive Failure Study of Discrete-Source Damage in Stiffened Composite Panels

Abstract

In this paper experimental and FEA methods were used to study the damage propagation and failure properties of stiffened composite panels with discrete-source damage. The influence of discrete-source damage on residual strength of the composite panel was also investigated. The research results indicated that notched composite panel was suitable to simulate the damage property of stiffened composite panel with discrete-source damage. It has showed that there is high strain concentration at the notch end. And break-through of the stringer can make the load path changed. Based on different failure criteria, FEA method with progressive failure procedure was used to simulate the damage progression and failure procedure of the notched stiffened composite panel effectively. The analytical result was in good correspondence with the experimental data.

Investigation of the out-of-plane load-bearing capacity of T1100/5405 composite T-stiffened panels

“…Jasto and Reinoso et al 15 conducted experimental analysis on the initial position and propagation path of T-stiffened panels damage and concluded that the damage started from the triangular position of the T-joint and expanded asymmetrically to both sides, which was consistent with the conclusion drawn by Zhu 16 and Cheng et al 17 . Li et al 18 studied the damage propagation and failure characteristics of composite stiffened panels with notches under compression loading by experimental and finite element methods. They also further analyzed the effect of notches on the residual strength of the panels and predicted the failure mode by combining the maximum stress criterion and Hashin criterion.…”