Analysis of interfacial failure in omega stiffened composite panel with embedded defect

doi:10.19936/j.cnki.2096-8000.20220828.004

Abstract

Abstract: This article aimed at the interface de-bonding between stringer and skin as the structure under post-buckling loads. A four-point bending test that includes non-defect and embedded defect was firstly set up to characterize post-buckling failure in typical regions of stiffened panels and the cohesive zone model (CZM) considering the effects of through-thickness compression on the inter-laminar shear failure of composite laminates was employed. The numerical result is in good agreement with experimental one. The results indicate that: embedded defect at flange/skin interface has slight influence on the load capacity of the structure, but embedded defect at flange/radius-filler interface has significant influence on the load capacity of the structure, and delamination always initiated at the flange/radius-filler interface area.

Key words: composite, cohesive zone model, post-buckling, stiffened panel, interface de-bondinge

CLC Number:

TB332

CHENG Li-nan, XU Si-wen, CHEN Xiang-ming, LI Xin-xiang, QU Tian-jiao. Analysis of interfacial failure in omega stiffened composite panel with embedded defect[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(8): 28-34.

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