BOMS II, BUCKLING OF STIFFENED MULTILAYERED CIRCULAR CYLINDRICAL SHELLS WITH DIFFERENT ORTHOTROPIC MODULI IN TENSION AND COMPRESSION.
Technical rept. Mar-Aug 70,
AEROSPACE CORP SAN BERNARDINO CALIF SAN BERNARDINO OPERATIONS
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An exact buckling criterion, within the framework of classical buckling theory,is derived for eccentrically stiffened multilayered circular cylindrical shells made of materials that have different orthotropic moduli in tension and compression. Such behavior is typical of many current composite materials. The buckling criterion is valid for arbitrary combinations of axial and circumferential loading, including axial compression and internal pressure as well as axial tension and lateral pressure. The material model stress-strain relationship involves a bilinear stress-strain curve with a discontinuity in slope modulus at the origin. A numerical example of buckling of a ring-stiffened two-layered circular cylindrical shell is given to illustrate application of the buckling criterion. A FORTRAN IV computer program, BOMS II, that implements the aforementioned analysis is described and listed. Author-PL
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