PROGRESSIVE DAMAGE ANALYSIS OF OMEGA STIFFENEDCOMPOSITE PANELS WITH DIFFERENT ORIENTED NOTCH

Abstract

Abstract: It is of great significance to study the load-bearing strength and failure modes of omega stiffened composite panels with different oriented notches under axial compressive loads. By compiling VUMAT subroutine, the selected three-dimensional Hashin failure criterion and stiffness degradation mode were added to the progressive damage model analysis. Firstly, the displacement-load curve, out-of-plane displacement and failure mode of the 0° notch model were studied, and the results were compared with the experimental results and the literature to verify the correctness of the model, and the effect of different oriented notches on stiffened panels was further studied. The results show that the stiffened panel model with 90° notch has the strongest bearing capacity under axial compression, followed by 45° notch model and 0° notch model. The fiber compression failure of 0° notch model appears at the lower side of the model, 45° and 90° notch model appears at both sides of the notch, and the failure of the three models extends vertically with the load.

Key words: composite materials, omega stiffened composite panels, VUMAT, three-dimensional Hashin failure criterion, progressive damage model

CLC Number:

TB332

YU Fen, AN Bo-ning, LIU Wu-shuai, GUO Tuo. PROGRESSIVE DAMAGE ANALYSIS OF OMEGA STIFFENEDCOMPOSITE PANELS WITH DIFFERENT ORIENTED NOTCH[J]. Composites Science and Engineering, 2020, 0(4): 13-18.

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