Before revision: In a stressed-skin design, the skin or outer covering is bonded or pinned to the frame, adding structural rigidity by serving as the triangulating member which resists distortion of the rectangular structure.
After revision: upThe square frame (black members) resist compression while the skin (translucent pink), which is fixed to the frame (blue rivets), resists in-plane shear that would distort the frame from squareIn a stressed-skin design, the skin or outer covering is bonded or pinned to the frame, adding structural rigidity by serving as the triangulating member which resists distortion of the rectangular structure.