A method for modeling the local and global buckling of delaminated composite plates

摘要

An analytic methodology is presented for predicting the buckling initiation of delaminated composite plates. Both global and load sublimate buckling deformation modes are predicted for rectangular plates of any thickness. The global behavior of he delimitation zone is accounted for by summing the individual stiffness contributions of each subliming constituting the delimitation zone. This allows for the delimitation zone to be treated as a single plate when performing global buckling predictions. Local buckling predictions are obtained by modeling a sublimate adjacent to the surface as a separate elliptical plate. These analytical predictions compare closely with the results of detailed finite element models investigating several cases of delaminated plates. The methodology presented is found to be accurate for the cases considered and versatile as it can accommodate plates of any aspect ratio and having arbitrarily sized and located delaminating.