Comparison of numerical analysis of linear and post-buckling behavior of CFRP T-stiffeners with experimental results

ISSN： 1568-5519

Source： Advanced Composite Materials, Vol.7, Iss.3, 1998-01, pp. : 263-283

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Abstract

Numerical predictions of linear buckling and post-buckling behavior of CFRP T-stiffeners are conducted by Finite Element Analysis. Such behavior is crucially important in aircraft structural design. Comparison between numerical predictions and experimental behavior is executed in detail. Width-to-thickness ratio in flange or web mainly governs linear buckling stresses. Inserted filler along the intersection line between flange and web also considerably affects the linear buckling behavior. By taking realistic initial imperfection into account, geometrical nonlinear analysis provides fairly descriptive post-buckling deflection behavior in flange and web. It is also possible to predict the final failure stress by assuming simple failure criteria and non-progressive failure.