Donut-shaped elastic torus and its cross-section.

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What is the geometric shape that describes a bagel or donut? - Quora

What is the geometric shape that describes a bagel or donut? - Quora

Takahiro TOMIOKA, Professor (Full), Doctor of Engineering, Akita Prefectural University, Akitashi, Department of Mechanical Engineering

Torus - Wikipedia

Takahiro TOMIOKA, Professor (Full), Doctor of Engineering, Akita Prefectural University, Akitashi, Department of Mechanical Engineering

Geometry-induced rigidity in elastic torus from circular to oblique elliptic cross-section - ScienceDirect

Sweep

Torus - Wikipedia

Torus - Wikipedia

Is the universe shaped like a donut or a sphere without the middle? - Quora

Torus - Wikiwand

Torus - Wikipedia

O Ring Size Chart, PDF, Mechanical Engineering

A: view of how the cross-sectional area (CSA) of a torus would look