Also called the crack stress field coefficient. It was introduced by G. Irwin (1957) as a parameter that represents the stress field near the crack tip (the region where the magnitude of stress is a function of position). It has dimensions of (stress) × (length) 1/2 and indicates the value and spread of stress near the crack tip. Therefore, if the value of this coefficient is the same, the stress distribution at the crack tip will be congruent. This coefficient is also related to the energy consumed for crack growth and the growth rate of fatigue cracks, and its limit value is applied to brittle fracture as a fracture toughness value, and is used in strength design. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
亀裂応力場係数ともいう。亀裂先端の近傍の応力場 (応力の大きさが位置の関数となる領域) を表わすパラメータとして,G.アーウィンによって導入された (1957) 。これは (応力) × (長さ) 1/2 の次元をもち,亀裂先端付近の応力の値と広がりを示す。したがってこの係数の値が同じならば,亀裂先端では合同な応力分布となる。この係数は亀裂進展に費やされるエネルギーや疲れ亀裂の進展速度とも関係づけられるほか,その限界値が破壊靭性値として脆性破壊に適用されるなど,強度設計に応用されている。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
<<: Stress relief - O-ryokukanwa
It is one of the six schools of Indian philosophy...
The animals are transported to places where custom...
This is a farming method that is said to have bee...
...These natural conditions, combined with histor...
A member of the Bovidae family of the order Artiod...
Born: April 23, 1892 in Frankenau [Died] April 20,...
This powder was first sold by Kamimura Yoshiya at ...
An insect of the Orthoptera order, Grylloidea, fam...
Year of death: 25th July 1806 (7th September 1806)...
A supernatural creature said to live in the mount...
A beautiful large moss of the Hypnaceae family. It...
It is an acute, transient mental abnormality seen ...
...It is also used in analytical equipment such a...
It is a type of celestial coordinate system that ...
Queen of Yamataikoku in the 3rd century. Date of b...