Delamination and Skin-Stringer Separation Analysis in Composite Stiffened Shells

Proceedings of the Seventh International Conference on Computational Structures Technology (CD-Rom Edition) 2004
Kaspars Kalniņš, Rolands Rikards, Oļģerts Ozoliņš

In the present paper the skin-stringer delamination problem for composite stiffened shells is solved. The skin-stringer delamination is analyzed employing linear fracture mechanics approach. Energy release rates (ERR) are calculated by Modified Virtual Crack Closure Integral (MVCCI) method. The problem is solved not using the 3D solid finite elements, but employing the 2D shell elements. Employment of the 2D shell elements instead of 3D elements significantly reduces computational efforts in the case when whole composite stiffened structure is analyzed for postbuckling. Mode I, mode II and mixed mode I/II fracture properties are obtained for the fracture criterion of the carbon/epoxy composite laminate. The fracture criterion is used for prediction of delamination at the skin-stringer interface.

Atslēgas vārdi
skin-stringer delamination, composite laminate, mixed mode fracture,

Kalniņš, K., Rikards, R., Ozoliņš, O. Delamination and Skin-Stringer Separation Analysis in Composite Stiffened Shells. No: Proceedings of the Seventh International Conference on Computational Structures Technology (CD-Rom Edition), Portugāle, Lisbon, 7.-9. septembris, 2004. Lisbon: Civil-Comp Press, 2004, 1.-11.lpp.

Publikācijas valoda
English (en)