rock modulus of elasticity

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Young's modulus - Wikipedia

Young's modulus, the Young modulus, or the modulus of elasticity in tension, is a mechanical property that measures the tensile stiffness of a solid material It quantifies the relationship between tensile stress (force per unit area) and axial strain (proportional deformation) in the linear elastic region of a material and is determined using the formula:...

Elastic modulus evolution of rocks under heating–cooling ,

Aug 14, 2020· A rock is a natural aggregate of minerals with internal defects (cracks and pores) Therefore, its elastic modulus is determined by both the mineral components and internal defects...

Report No REC-ERC-74-10, Rock Mechanics Properties of ,

The rock is an amphibolite ENGINEERING PROPERTIES OF ROCK CORE SAMPLES STATIC MODULUS OF ELASTICITY SPECIFIC GRAVITY ABSORPTION,% No No spec avg 294 range 016 ~g 01 range 01 spec stressrange psi 0-2000 0-4000 0-6000 0-8000 Secant E 106psi 135 138 132 129 ~ (~18202121 (3) COMPRES~VESTRENGTH,PSI avg 40300 range 20200 (3 ....

Rock Mechanics

• 6 stiffness classes (Table 74): based on modulus of elasticity E t50; ‘very stiff’ to ‘highly yielding’ Engineering Classification of Rock and Rock Masses! 33!! Determining the modulus of elasticity E t50! Plotting E t50 value of a rock vs the unconfined compressive strength ,...

IS 9221 (1979): Method for the determination of modulus of ,

Rock Mechanics Sectional Committee had been approved by the Civil Engineering Division Council 02 A number of Indian Standards covering the method for tests of rock materials arc being formulated In this standard method for determi- nation of modulus of elasticity and Poisson’s ratio of rock materials in...

DEFORMABILITY PROPERTIES OF ROCKS AND ROCK MASSES ,

22 Dynamic Elastic Constants The Young's modulus, Poisson's ratio and shear modulus can be determined by dynamic methods Dynamic elastic properties are obtained by rapid application of stress to a rock specimen One method of achieving this is to subject the specimen to ultrasonic compression...

1 Rock Elasticity - SlideShare

Jan 27, 2014· 1 Rock Elasticity 1 Rock Elasticity 1 James A Craig Omega 2011 3 Ability of materials to resist and recover from deformations produced by forc Applied stress leads to a strain, which is reversible when the stress is removed The relationship between stress and strain is linear; only when changes in the forces are sufficiently small ....

Solved: 1) Modulus Of Elasticity Of Mass Rock Is Usually ,

1) modulus of elasticity of mass rock is usually ? a) less than rock substance b) equal to rock substance c) higher than rock substance d) not correlated to rock subsrance 2) project control work start from a) begining of project b) during construction 3) best place to build exhibition center a) in high population residential area b) remot ....

HOW TO ESTIMATE STRENGTH AND MODULUS OF ROCK ,

Aug 15, 2015· Strength and Modulus of Weathered Rock from SPT Valu In the weathered rock it is difficult to drive the split sampler to the full specified depth as in soil Hence we may estimate the strength and elastic modulus values of weathered rock by driving the spt apparatus for a fixed number of blows and find the penetration...

Axial Capacity of Drilled Shafts in Rock

Two critical rock mass properties used to evaluate settlement are the elastic modulus and poisson’s ratio Per LRFD 10465, the elastic modulus of the rock mass, E m, shall be taken as the lesser of Axial Capacity of Drilled Shafts in Rock Oct 2016 Page 5 the intact modulus of a sample of rock ,...

Soil elastic Young's modulus - Geotechdatainfo

Sep 17, 2013· Soil Young's modulus (E), commonly reffred to as soil elastic modulus, is an elastic soil parameter and a measure of soil stiffness It is defined as the ratio of the stress along an axis over the strain along that axis in the range of elastic soil behaviour...

Standard Test Method for Elastic Moduli of Intact Rock ,

Withdrawn Rationale: This test method covers the determination of elastic moduli of intact rock core specimens in uniaxial compression It specifies the apparatus, instrumentation, and procedures for determining the stress-axial strain and the stress-lateral strain curves, as well as Young's modulus, E, and Poisson's ratio, Formerly under the jurisdiction of Committee D18 on Soil and Rock ....

WHAT ARE THE VALUES OF MODULUS OF ELASTICITY & ,

Feb 13, 2015· Poisson’s Ratio of Rock Poisson’s ratio measures the ratio of lateral strain to axial strain at linearly elastic region For most rocks, the value of Poisson’s ratio ranges in between 015 to 040 Typical values of modulus of elasticity of some common are given in the table below...

Modulus of Elasticity - Definition, Measurement, Units ,

The elastic modulus allows you to determine how a given material will respond to Stress Elastic modulus is used to characterize biological materials like cartilage and bone as well Test your Knowledge on Modulus of elasticity Q 5 Put your understanding of this concept to test by answering a few MCQs Click ‘Start Quiz’ to begin!...

Elastic modulus evolution of rocks under heating–cooling ,

Aug 14, 2020· A rock is a natural aggregate of minerals with internal defects (cracks and pores) Therefore, its elastic modulus is determined by both the mineral components and internal defects...

(PDF) Estimating the modulus of elasticity of the rock ,

Oct 01, 2008· The modulus of elasticity of rock material (Ei) is an important rock property that is used as an input parameter in the design stage of engineering projects such as dam and tunnel constructions ....

Modulus of Elasticity of Concrete - Civil Engineering

Units of Elastic Modulus Units of elastic modulus are followings: In SI unit MPa or N/mm 2 or KN/m 2 In FPS unit psi or ksi or psf or ksf Modulus of Elasticity of Concrete Modulus of Elasticity of Concrete can be defined as the slope of the line drawn from stress of zero to a compressive stress of 045f’ c As concrete is a heterogeneous ....

Empirical Estimation of Rock Mass Modulus

Empirical estimation of rock mass modulus E Hoek and MS Diederichs Based on an analysis of an extensive data set from China and Taiwan the authors have proposed two new equations for empirical estimates of the deformation modulus of rock mass These estimates are based on the Geological Strength Index (GSI), the...

Modulus of Subgrade reaction - Which one to use

Modulus of Subgrade Reaction - Which One Should be Used? By Wayne W Walker, PE , FACI and Jerry A Holland, PE, FACI The modulus of subgrade reaction is an often misunderstood and misused concept for the thickness design of slabs-on-ground Terzaghi in 1955 (Ref 1, P 300) attributed this confusion to the initial work by Hayashi in...

Mechanical Properties and Energy Dissipation of Sandstone ,

According to the theory of rock mechanics, the change of elastic modulus of rock under cyclic loading could be divided into three stag (1) The rising stage of elastic modulus: generally occurred at the initial stage of loading At this time, the primary pores in the loaded rock were gradually compacted...

modulus of elasticity of basalt rock - greenrevolutionorgin

Improving Elastic Modulus Measurements for Rock , - Inside Mines were performed on 78 samples of nine rock types, including two basalts, two granites, two limestones, a ,...

Axial Capacity of Drilled Shafts in Rock

Two critical rock mass properties used to evaluate settlement are the elastic modulus and poisson’s ratio Per LRFD 10465, the elastic modulus of the rock mass, E m, shall be taken as the lesser of Axial Capacity of Drilled Shafts in Rock Oct 2016 Page 5 the intact modulus of a sample of rock ,...

Mechanical Properties and Energy Dissipation of Sandstone ,

According to the theory of rock mechanics, the change of elastic modulus of rock under cyclic loading could be divided into three stag (1) The rising stage of elastic modulus: generally occurred at the initial stage of loading At this time, the primary pores in the loaded rock were gradually compacted...

Estimation of Elastic Modulus of Intact Rocks by ,

Mar 10, 2012· The modulus of elasticity of intact rock (E i) is an important rock property that is used as an input parameter in the design stage of engineering projects such as dams, slopes, foundations, tunnel constructions and mining excavations However, it is sometimes difficult to determine the modulus of elasticity in laboratory tests because high-quality cores are required For this reason, various ....

IS 9221 (1979): Method for the determination of modulus of ,

Rock Mechanics Sectional Committee had been approved by the Civil Engineering Division Council 02 A number of Indian Standards covering the method for tests of rock materials arc being formulated In this standard method for determi- nation of modulus of elasticity and Poisson’s ratio of rock materials in...

Design Manual Engineering Properties of Soil and Rock

rock in cases where slope failures occur, or where embankment settlement or excessive settlement of existing structures have been observed For instance, with landslides or slope failures, the geotechnical , (elastic modulus, Poisson’s ratio, etc), see Sabatini...

Elastic and Shear Moduli of Coal Measure Rocks Derived ,

elastic modulus, or Young’s modulus, and shear modulus are used when deformations in underground mines need to be computed Experimentally, the elastic modulus can be determined from the stress–strain response of a rock sample subjected to uniaxial compression However, this is a complicated and time consuming experiment very...

Elastic Modulus and Strength of Rock-Like Material with ,

Oct 30, 2018· Locked-in stress is a special stress objectively existing in the rock which has an important influence on the mechanical properti However, there were few studies on the locked-in stress in rocks The locked-in stress was simplified into spherical inclusions of stress Based on the Eshelby inclusion theory, the influence equation of the locked-in stress on the elastic modulus of the rock is ....

THE DEFORMATION MODULUS OF ROCK MASSES - ,

Modulus of elasticity or Young's modulus ( E ): The ratio of stress to corresponding strain below the proportionality limit of a material Values of E for various rocks are shown in Table A-1 in the Appendix Modulus of deformation of a rock mass ( Em ): The ratio of stress (p) to ,...

Estimating the modulus of elasticity of T the rock ,

Estimating the modulus of elasticity of the rock material from compressive strength and unit weight by I Ocak* Synopsis The modulus of elasticity of rock material (Ei) is an important rock property that is used as an input parameter in the design stage of engineering projects such as dam and tunnel constructions, mining excavations, and so forth...