Conjugate fold - conjugate fold

...A fold whose axis is thinner than its wings is called a thin-top fold. There are also various terms for this fold, such as a chevron fold, which has straight wings and sharp hinges, a conjugate fold, which has two equal axial planes, and a discontinuous axial plane, which has hinges offset from one another on each fold surface. There are also terms based on the shape of the fold surface, such as a box fold and a fan fold.

*Some of the terminology explanations that mention "conjugate folds" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…翼部に比べ軸部の層厚が薄い褶曲を薄頂褶曲と呼ぶ。　そのほか，翼が直線状でヒンジのとがったシェブロンchevron褶曲，2方向の対等の軸面をもった共役褶曲，褶曲面ごとにヒンジの位置がずれて不連続な軸面をもつ非調和褶曲などさまざまな術語がある。また，箱型褶曲，扇状褶曲など褶曲面の形状による術語もある。…

※「共役褶曲」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報