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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Critical state soil mechanics ： ウィキペディア英語版 Critical state soil mechanics Critical State Soil Mechanics is the area of Soil Mechanics that encompasses the conceptual models that represent the mechanical behavior of saturated remolded soils based on the ''Critical State'' concept. ==Formulation== The Critical State concept is an idealization of the observed behavior of saturated remoulded clays in triaxial compression tests, and it is assumed to apply to undisturbed soils. It states that soils and other granular materials, if continuously distorted (sheared) until they flow as a frictional fluid, will come into a well-defined critical state. At the onset of the critical state, shear distortions $\backslash \; \backslash varepsilon\_s$ occur without any further changes in mean effective stress $\backslash \; p\text{'}$, deviatoric stress $\backslash \; q$ (or yield stress, $\backslash \; \backslash sigma\_y$, in uniaxial tension according to the von Mises yielding criterion), or specific volume $\backslash \; \backslash nu$: :$\backslash \; \backslash frac=\backslash frac=\backslash frac=0$ where, :$\backslash \; \backslash nu=1+e$ :$\backslash \; p\text{'}=\backslash frac(\backslash sigma\_1\text{'}+\backslash sigma\_2\text{'}+\backslash sigma\_3\text{'})$ :$\backslash \; q=\; \backslash sqrt\}$ However, for triaxial conditions $\backslash \; \backslash sigma\_2\text{'}=\backslash sigma\_3\text{'}$. Thus, :$\backslash \; p\text{'}=\backslash frac(\backslash sigma\_1\text{'}+2\backslash sigma\_3\text{'})$ :$\backslash \; q=(\backslash sigma\_1\text{'}-\backslash sigma\_3\text{'})$ All critical states, for a given soil, form a unique line called the ''Critical State Line'' (''CSL'') defined by the following equations in the space $\backslash \; (p\text{'},\; q,\; v)$: :$\backslash \; q=Mp\text{'}$ :$\backslash \; \backslash nu=\backslash Gamma-\backslash lambda\; \backslash ln(p\text{'})$ where $\backslash \; M$, $\backslash \; \backslash Gamma$, and $\backslash \; \backslash lambda$ are soil constants. The first equation determines the magnitude of the deviatoric stress $\backslash \; q$ needed to keep the soil flowing continuously as the product of a frictional constant $\backslash \; M$ (capital $\backslash \; \backslash mu$) and the mean effective stress $\backslash \; p\text{'}$. The second equation states that the specific volume $\backslash \; \backslash nu$ occupied by unit volume of flowing particles will decrease as the logarithm of the mean effective stress increases. 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「Critical state soil mechanics」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.