Non-linear solution for locally delaminated buckling near the surface of a laminated cylindrical shell under hydrothermal environment

摘要

An investigation is carried out to understand hydrothermal effects on locally delaminated buckling near the surface of a cylindrical laminated shell. The delamination shape is considered as a rectangle. The sub-laminated shell is taken as monolayer or multilayer. The stacking sequence of sub-layers may be asymmetric. The effect of non-linear buckling for local delamination of cylindrical laminated shells is obtained by considering transverse displacements of the sub-laminated shell. The Young's modulus and the thermal and humidity expansion coefficients of the material are treated as functions of temperature change in base laminated shells. The critical strains of cylindrical laminated shells with various hydrothermal environments, different stacking sequences and different radii of the cylindrical laminated shells are obtained by means of the energy principle. From example calculations, it is found that the non-linear solution of critical buckling for local delamination near the surface of a laminated cylindrical shell under a hydrothermal environment gives a lower value than that from linear analysis.