Post-buckling behavior of composite panels in the presence of unstable delaminations

• Published in: Composite structures Vol. 51; no. 3; pp. 301 - 309
• Main Authors: Gaudenzi, P., Perugini, P., Riccio, A.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-03-2001; Elsevier Science
• Subjects: Composite panels; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Other structures; Physics; Post buckling behavior; Solid mechanics; Structural and continuum mechanics; Structural mechanics (beam, string...); Theory and numerical methods; Unstable delaminations; Post buckling behavior; Composite panels; Unstable delaminations; Compression; Crack closure effect; Numerical method; Experimental study; Continuation method; Composite material; Postbuckling; Plate; Crack propagation; Predictor corrector method; Panel; Shell; Virtual work principle; Numerical data; Non linear effect; Differential method; Delamination; Buckling; Damaging; Crack; Analytical continuation
• ISSN: 0263-8223; 1879-1085
• DOI: 10.1016/S0263-8223(00)00146-X

The analysis of the non-linear behavior of delaminated composites panels under compression is considered. A modification to the incremental continuation method (by Riks) for the analysis of the non-linear behavior of damaged composites is proposed to improve the numerical treatment of the analysis of unstable delamination growth. The theoretical formulation of this modification is first presented in conjunction with a general formulation of the continuation method and the modified virtual crack closure technique (MVCCT) for the evaluation of delamination growth. Finally, numerical results for delaminated composite plates through the width and circular delaminations are presented and compared with existing experimental and numerical data.