Filament Wound Shell

Thanks for sharing.

This is for you. You guys can work as a team.

Under Home Treasures

There might be an interesting problem here. If the filaments were wound predominantly circumferentially, what would protect the vessel from longitudinal stresses? The manufacturers have probably figured this out. Either longitudinal or helical fibers could solve this. The phrase "a/-a directions" perhaps addresses this, but it is too vague to tell.

That's the beauty of filament winding for tubes, pressure vessels, etc. The filaments are oriented to best accept the stresses. Once the epoxy cures they can accept both tension and compressive loads. Makes for very light, strong structures.

Other handy features include not being locked into integer numbers of plies, the ability to form compond curves easily, the ability to fully automate the layup process, and very little resin waste.

If the cylindrical axis is taken as angle zero, and the wrapping angle as θ, the fibers would resist longitudinal stress per cos θ, and circumferential stress per sin θ. Just add them all up, plus maybe a smidge for the glue.

or how about referring to an established code/standard?

A couple examples (of numerous):

ASME RTP-1

ASME BPVC Section X

BS EN 13923:2005

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