Abstract: In this study, the ultimate load capability and failure modes of filament-wounded composite cylindrical shells with through crack has been investigated. First, axial compression test was carried out for two series filament-wounded cracked cylindrical shells. For A series thick wall cylindrical shell, crack led a 53.96% drop in load capability, and the failure mode transferred from local buckling to crack propagation and brittle fracture. For B series thin wall cylindrical shell, the failure modes were local buckling and the load capability decreased by 12.59%. Then, numerical analysis of cracked composite cylindrical shells under axial compression was developed by ABAQUS 6.14 using nonlinear algorithm RIKS. The Hashin failure criteria and damage evolution guidelines were introduced in the model to predict the progressive failure modes and the ultimate load. A good agreement was observed between numerical simulation and experimental results, and the maximum error was 7.01%. Furthermore, the effects of crack orientation and wind angle on the load capability of an axially loaded cracked cylindrical shell were studied. For cracked filament-wounded composite cylindrical shell with ±55° layer, the ultimate bearing capability increased first then decreased with the increasing crack orientation. The maximum limit load was got when α=45°.With the increase of wind angle ,the carrying capability showed a downward trend after the first rise for cylindrical shells with α=15°,45°,55° crack. And the wind angle had a more obvious influence on carrying capability with smaller crack orientation. The maximum limit load was got when θ=30°.
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2017, Vol. 31 
