永えい久きゅうひずみ

え

い

きゅ

う

ひ

ず

み

Meanings

permanent strain; permanent set; permanent deformation

Technical term in materials science and engineering for irreversible deformation remaining after stress is removed.

弾だん性せいひずみ
Elastic strain, which disappears when stress is removed, unlike 永久ひずみ.
塑そ性せい変へん形けい
Plastic deformation, a broader term for permanent shape change; 永久ひずみ is often used as a synonym in engineering contexts.

永えい久きゅうひずみ
Common mixed kanji-kana spelling; ひずみ is often written in kana.
永えい久きゅう歪ひずみ
Full kanji spelling; 歪み is less common but still used in technical contexts.
永えい久きゅう歪ひずみ
Abbreviated kanji spelling; rarely used.

Compound of 永久 (eternal, permanent) and ひずみ (strain, distortion). The reading ひずみ is the nominalized form of the verb 歪む (ゆがむ, to warp).