Thin-shell hoop and longitudinal stress

Knowledge package outline

Topic

Engineering design and systems reasoning

Purpose

Explains why cylindrical and spherical shells carry pressure loads differently without prescribing a pressure-vessel design.

Package contents

Paper free-body diagrams; hoop-versus-axial stress comparisons; thin-wall assumption limits; discontinuity and professional-code caveats.

Dependencies

Statics; stress; geometry; qualified engineering review; no pressure testing or fabrication.