Biot-willis数
http://www.multiphysics.us/poroelasticity.html WebBiot系数没有明确的物理意义，也没有精确的确定方法，有人采用实验方法加以确定，实验方法很多，测量的数值也很分散，有大于1的，也有小于0的，很难在实际中加以应用。. 更 …
Biot-willis数
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WebBiot theory is the basis to describe wave propagation in porous media, starting with Terzaghi law, Gassmann equation, and the static approach leading to the concept of … WebJun 10, 2013 · Fig 7: Biot stress coefficient based on th e Biot-Willis relation (see Eq. 1 3 and 14) from measurements of the p - and s-wave . …
WebOct 18, 2016 · The Biot-Willis coefficient is a key component associated with the effective stress field, where it represents the proportion of fluid pressure that counteracts the … Webビオ数（ビオすう、英: Biot number ）は伝熱に関する無次元量であり、固体内部の熱伝導と、表面からの熱伝達量の比率である。 その名はフランスの物理学者ジャン＝バティ …
WebApr 7, 2008 · This paper is devoted to the experimental determination of distinctive macroscopic structural (porosity, tortuosity, and permeability) and mechanical (Biot–Willis elastic constants) properties of human trabecular bones. Then, the obtained data may serve as input parameters for modeling wave propagation in cancellous bones using Biot’s … WebBiot-Willis coefficients αi can lead to strong coupling of the different subsystems and prevent direct exploitation of each subsystem’s properties. In the case of vanishing viscosities (ν i ...
WebA proper correlation of the Biot-Willis coefficient controlling the bulk volumetric strain is developed using the data available from various sources in a manner to meet the required endpoint ...
Webrather than Biot’s effective stress σ ij= σ el+ B p δ . (2.2) Here B el is elastic Biot coefficient, pis the fluid pressure and σ ijare components of the (total) stress tensor. The standard sign convention for the stresses and fluid pressure is used here: the stresses are positive when they are tensile while the city college of new york winter sessionWebApr 7, 2008 · This paper is devoted to the experimental determination of distinctive macroscopic structural (porosity, tortuosity, and permeability) and mechanical … dictionary definition of scienceWebNov 25, 2024 · Let and be the elastic and poroelastic stress tensors, respectively: where and are the Lamé parameters and is the Biot–Willis constant. The poroelasticity region is governed by the quasi-static Biot system [ 23 ]: where is a storage coefficient and is the symmetric and uniformly positive definite rock permeability tensor, satisfying, for ... dictionary definition of rationWeb7.2 有效应力的概念. 应力-应变关系（7.19）和（7.20）可以解释为增量场之间的关系，其中 应力和应变是相对于参考应力和应变的增量（在波传播情况下） ，或者，是绝对场之间 … city college of new york zip codeWebFeb 29, 2024 · ABSTRACT Stress, rock microstructure and frequency are the three key factors that influence the velocities of elastic waves and, hence, are sensitive to the Biot effective stress parameter (α) in porous rocks. The effective stress in an isotropic poroelastic medium relates to applied pressure and pore pressure, with the Biot parameter (α) as a … city college of new york vs hunterWebOct 16, 2016 · ABSTRACT. The Biot-Willis coefficient is a key component associated with the effective stress field, where it represents the proportion of fluid pressure that counteracts the confining stress. To properly estimate the Biot-Willis coefficient, we require knowledge of the more fundamental building blocks of a rock mass that go beyond the elastic … dictionary definition of remoteWebFeb 1, 2010 · In a linear-elastic isotropic sediment β may ideally be calculated from sonic velocity (compressional velocity, V p and shear velocity, V s) and bulk density ρ b (Biot and Willis, 1957): M = ρ b V p 2 μ = ρ b V s 2 K = M − 4 3 G β = 1 − K dry K 0 where, M, μ and K are the compressional, shear and bulk modulus of the rock respectively. dictionary definition of scum