ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Effects of defects in cylindrical panels and fix-errors on buckling behavior
Received date: 2015-08-28
Revised date: 2015-12-22
Online published: 2016-01-15
Buckling behavior of composite curved panels is sensitive to defects. Studies of the effects of defects on buckling performance in numerical simulations and tests are of great significance to engineering applications of composite curved panels. The effects of common defects in composite cylindrical panels and fix-errors caused by these defects on buckling behavior are studied by numerical simulations. Ideal curved panels and panels with defects are modeled and fix-errors caused by defects are considered. The defects occasionally come from manufacturing process, including inclination, non-uniform thickness and warpage. Bulking loads and strain distribution of curved panels are calculated. Results of panels with defects are compared with those of ideal curved panels. The research indicates that inclination has a great influence on the strain distribution of loaded panels, which makes critical buckling loads decrease sharply. Warpage has fewer effects on the strain distribution but also makes critical buckling loads decrease greatly. Non-uniform thickness has little effect on buckling behavior of cylindrical panels. Experiment of panels with defects under axial uniform load is carried out and testing results verify the numerical results.
Key words： cylindrical panel; buckling; defects; fix-errors; FEA
ZHU Lin , YU Yin , WANG Hai . Effects of defects in cylindrical panels and fix-errors on buckling behavior[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(7) : 2180 -2188 . DOI: 10.7527/S1000-6893.2015.0352
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