Results 21 to 30 of about 109,833 (165)

A New Correlation for Estimating Static Elastic Properties of Sandstone Formations: Case Study from Rumaila Oilfield

open access: yesIraqi Geological Journal
Evaluating the elastic characteristics of reservoir's rocks is crucial for the oil and gas sector to reduce risks throughout drilling and production operations. Elastic parameters are essential for prediction of wellbore stability, estimation of
Doaa Mahdi, Ayad Alrazzaq
doaj   +1 more source

The study of the relation model between elastic modulus and porosity in deep coal seam roof sandstone

open access: yes矿业科学学报, 2019
Rock mass’s elastic modulus is closely related to its compositions,inner structural characteristics and stress-strain state.By assuming the elastic modulus of pore that as a part of rock is zero,a relational model between the elastic modulus of the whole
Zhao Yang   +4 more
doaj   +1 more source

Comparative Study on the Test Method for Tensile Elastic Modulus of Rock Materials

open access: yesAdvances in Civil Engineering, 2019
Rock material has different mechanical behaviors under compressive and tensile loading. Correspondingly, there are two types of elastic modulus: compressive elastic modulus Ec and tensile elastic modulus Et, respectively.
Yan Zhang, Dawei Yu
doaj   +1 more source

Selective Penetration and Profile Control Performance of Preformed Particle Gels for Heterogeneous Oil Reservoirs

open access: yesGels, 2022
The preformed particle gel (PPG) has been proved to be an effective chemical agent to reduce fluid channeling and increase the sweeping efficiency. However, we still lack a clear understanding of the field-scale matching relationship between PPG size ...
Kang Zhou   +3 more
doaj   +1 more source

Injection molding temperature dependence of elastic coefficients obtained using three-point bending tests to ascertain thermoplastic polymer coefficients

open access: yesMechanical Engineering Journal, 2021
Thermoplastic resins, which are lighter than metals and ceramics, have many features such as excellent processability. They are used in widely various fields for daily necessities and for transportation equipment.
Tetsuo TAKAYAMA, Yuki MOTOYAMA
doaj   +1 more source

A dynamic damage constitutive model considering the effect of joint inclination on the modulus of elasticity of slates

open access: yesScientific Reports
The dynamic damage constitutive model has limitations and needs to reflect the quantitative relationship between the elastic modulus and joint inclination angle of the slate.
Tingting Gu   +5 more
doaj   +1 more source

Measurement of micro-region elastic anisotropy in textured metal by laser-ultrasonics

open access: yesAIP Advances, 2020
Measurement of elastic anisotropy in textured polycrystalline metals is very difficult, especially the nondestructive testing of the elastic anisotropy of micro-regions.
Rongrong Ma   +7 more
doaj   +1 more source

Study on the size effect of rock elastic modulus considering the influence of joint roughness

open access: yesFrontiers in Materials
The elastic modulus of rocks is a measure of the ability of rocks to resist elastic deformation. It is related to the size of rocks and can effectively measure the internal physical and mechanical strength of rocks.
Gaojian Hu   +6 more
doaj   +1 more source

Micro-Raman structural responses of nano-mechanical properties of different coal grades

open access: yesMeikuang Anquan, 2022
The mechanical properties of coal are heterogeneous and in multi-scale. Understanding the coal mechanical properties and structure in nano-scale is the key to know the fracturing transformation and crack expansion mechanisms of coal reservoirs.
HAN Yating, SUN Beilei
doaj   +1 more source

Association Between Atherosclerosis in Carotid Artery and Elastic Modulus of Brachial Artery [PDF]

open access: yesJournal of Tehran University Heart Center, 2007
Background: Common carotid arterial stiffness can be assessed during carotid arterial ultrasonography, but its association with brachial stiffness, a well-defined cardiovascular risk factor, has not been clarified.
Tavvos Rahmani-Cherati   +2 more
doaj   +1 more source

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