>>629
>ここの連中は凹み耐性が異常に強い

・なるほど
　Euler–Bernoulli beam theory（下記） 1750年ころは数学と物理や工学は未分化でして
　Eulerも beam＝梁 の力学を研究しました
・それが発展して、Plate theory（下記）の数学理論も出来て
　”耐凹み性”の数学理論もあります ；ｐ）

追伸
・Kirchhoff–Love のLoveは人名です
（Kirchhoffは有名な物理学者です）

(参考)
https://en.wikipedia.org/wiki/Euler%E2%80%93Bernoulli_beam_theory
Euler–Bernoulli beam theory
It was first enunciated circa 1750,[2]
Additional mathematical models have been developed, such as plate theory, but the simplicity of beam theory makes it an important tool in the sciences, especially structural and mechanical engineering.

https://en.wikipedia.org/wiki/Plate_theory
Plate theory
In continuum mechanics, plate theories are mathematical descriptions of the mechanics of flat plates that draw on the theory of beams.

Of the numerous plate theories that have been developed since the late 19th century, two are widely accepted and used in engineering. These are
・the Kirchhoff–Love theory of plates (classical plate theory)
・The Uflyand-Mindlin theory of plates (first-order shear plate theory)