Delamination growth for composite laminated cylindrical shells under external pressure

Abstract

The delamination growth may occur in delaminated cylindrical shells under external pressure. This will lead to failure of structure. By using the variational principle of moving boundary and considering the contact effect between delamination regions, in this work, the delamination growth was investigated for cylindrical shells under the action of external pressure. At the same time, according to the Griffith criterion, the formulas of energy release rate along the delamination front were obtained. In the numerical calculation, the delamination growth of axisymmetrical laminated cylindrical shells was analyzed, and the effects of delamination sizes and depths, the geometrical parameters, the material properties, and the laminate stacking sequences on delamination growth were discussed.

A Review on Structural Failure of Composite Pressure Hulls in Deep Sea

“…It is proved that neglecting the contact effect of delamination will lead to unreasonable calculation results. Fu and Yang [90], based on the variational principle of movable boundary and considering the contact effect between delamination, studied delamination extension of composite cylindrical shells with circumferential penetration delamination under external pressure in combination with the Griffith criterion.…”

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“…Diaconu et al [121] studied buckling characteristics and layup optimization of long laminated composite cylindrical shells subjected to combined loads. Fu and Yang [122] and Yang and Fu [123] described delamination growth for composite laminated cylindrical shells under external pressure. Shen [124] conducted a study on the hygrothermal effects on the postbuckling of laminated cylindrical shells.…”