| 翻訳と辞書 |
| Ductility (Earth science) ： ウィキペディア英語版 |
Ductility (Earth science)
In Earth science, ductility refers to the tendency of rock to deform to large strains without macroscopic fracturing. Such behaviour may occur in unlithified or poorly lithified sediments, in weak materials such as halite or at greater depths in all rock types where higher temperatures promote crystal plasticity and higher confining pressures suppress brittle fracture.
Ductile deformation is typically characterized by diffuse deformation (i.e. lacking a discrete fault plane) and on a stress-strain plot is accompanied by steady state sliding at failure, compared to the sharp stress drop observed in experiments during brittle failure.
==Brittle-ductile transition zone==
(詳細はcontinental crust, below which rock becomes less likely to fracture and more likely to deform ductilely. It is still possible for material above the transition zone to deform ductilely, and for material below to deform in a brittle manner. The zone exists because as depth increases confining pressure increases, and brittle strength increases with confining pressure whilst ductile strength decreases with increasing temperature. The transition zone occurs at the point where brittle strength equals ductile strength. In glacial ice this zone is at approximately depth.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Ductility (Earth science)」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|