cleavage fracture

Japanese: cleavage fracture(英語表記)cleavagefracture
cleavage fracture

…For this reason, there have been many cases where structures designed solely on the basis of mechanical properties such as tensile strength and yield stress have suffered major fracture accidents. Brittle fractures are usually divided into cleavage fractures and quasicleavage fractures based on the fracture surface morphology. Cleavage fractures are fractures that occur along the crystal plane with the weakest atomic bonding strength, i.e., the cleavage plane, without plastic deformation. Generally, they do not occur along a single cleavage plane, but across several parallel cleavage planes, and are characterized by the formation of a river-like pattern called a cleavage step or river pattern on a fracture unit called a cleavage facet. …

*Some of the terminology that refers to "cleavage fracture" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このために引張強度,降伏応力等の機械的性質からのみ設計された構造物が大きな破壊事故に至った場合も多い。 脆性破壊は破面形態から,へき開破壊cleavage fractureと擬へき開破壊quasicleavage fractureに分けるのが普通である。へき開破壊というのは,原子の結合力の最も弱い結晶面,つまりへき開面に沿って塑性変形することなく分離破壊するもので,一般に一つのへき開面で起こるのではなく,平行ないくつかのへき開面にまたがっているため,へき開ファセットcleavage facetとよばれる破面単位の上にへき開段cleavage stepあるいはリバーパターンriver patternとよばれる川状の模様を生じるのが特徴である。…

※「cleavage fracture」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

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