Determination of Nonassociated Constitutive Equation for Rock Salt from Experiments

1992 ◽  
pp. 511-523 ◽  
Author(s):  
N. Cristescu ◽  
U. Hunsche
Keyword(s):  
Constitutive Equation ◽  
Rock Salt

scholarly journals Determination of a Constitutive Equation by the Thin Wafer Method

1977 ◽  
Vol 43 (371) ◽  
pp. 2397-2403
Author(s):  
Noboru UEDA ◽  
Keizo KISHIDA ◽  
Kenji NAKAGAWA
Keyword(s):  
Constitutive Equation

scholarly journals Determination of permeability for hydrocarbon release due to excavation-induced stress redistribution in rock salt

2020 ◽  
Vol 136 ◽  
pp. 104525
Author(s):  
Hua Shao ◽  
Yifeng Wang ◽  
Thomas Nagel ◽  
Olaf Kolditz ◽  
Keita Yoshioka
Keyword(s):  
Rock Salt ◽  
Stress Redistribution ◽  
Induced Stress

EFFECT OF PETROLOGICAL FEATURES ON MECHANICAL PROPERTIES OF ROCK SALT FROM THE LGOM (LEGNICA–GŁOGÓW COPPER DISTRICT)

2016 ◽  
pp. 51-64 ◽  
Author(s):  
Katarzyna CYRAN ◽  
Tomasz TOBOŁA ◽  
Paweł KAMIŃSKI
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Uniaxial Compressive Strength ◽  
Rock Salt ◽  
Fluid Inclusions ◽  
Mechanical Parameters ◽  
Research Results ◽  
Strength Tests ◽  
Crystal Boundaries

The paper presents the attempt to find a correlation between the content of impurities and mechanical parameters of rock salt from the LGOM. Research was carried out in three steps: uniaxial compressive strength tests, determination of the content of insoluble minerals (impurities), and observations under the microscope and Raman microspectroscopy. The research results reveal that the rock salt which is characterized by low content of insoluble minerals (0.13–2.11% wt.) shows no correlation between the mechanical properties and the content of impurities. However, it was found that mechanical properties depend on both the distribution of impurities in halite crystals and the presence of fluid inclusions and hydrocarbons along the crystal boundaries. Moreover, the distribution of anhydrite at the edges of halite crystals may influence an increase of rock salt strength. On the contrary, the presence of fluid inclusions and hydrocarbons along the halite crystal boundaries may reduce the rock salt strength.

Determining the Anisotropy Coefficients of an Ultra Fine Grained Al6082 Alloy Subjected to ECAP

2007 ◽  
Vol 537-538 ◽  
pp. 215-222
Author(s):  
György Krállics ◽  
Arpad Fodor
Keyword(s):  
Constitutive Equation ◽  
Yield Stress ◽  
Continuum Mechanics ◽  
Equivalent Stress ◽  
Strain Curve ◽  
Equivalent Strain ◽  
Rigid Plastic ◽  
Fine Grained ◽  
Anisotropy Coefficients

Bulk Al6082 alloy is subjected to ECAP using route Bc. This paper focuses on the determination of the anisotropy coefficients and equivalent stress-equivalent strain curve using continuum mechanics equations. Assuming the material to be rigid-plastic, the parameters of the constitutive equation are determined with the aid of measuring the deformation and the uniaxial yield stress during upsetting tests in three perpendicular directions.

Determination of the Corrosion Mechanisms of High-Level Waste Containing Glass

1981 ◽  
Vol 11 ◽  
Author(s):  
Horst Scholze ◽  
Reinhard Conradt ◽  
Heinrich Engelke ◽  
Hans Roggendorf
Keyword(s):  
Rock Salt ◽  
High Level Waste ◽  
Extreme Conditions ◽  
Safety Standard ◽  
Waste Forms ◽  
Corrosion Mechanisms ◽  
High Level

The German concept of high level waste final storage provides the use of certain glasses containing radioelement oxides as glass components. These waste forms are to be stored in rock salt formations in order to isolate the waste from the biosphere. The efficiency of this isolation is a most important question. The aim is to achieve a high safety standard that remains valid under extreme conditions such as the uncontrolled water entrance to the deposit.

TlBa2NdCu2O7 AND TlBa2YCu2O7 TWO NON-SUPERCONDUCTIVE OXIDES WITH THE “1212” STRUCTURE

1989 ◽  
Vol 03 (01) ◽  
pp. 93-99 ◽  
Author(s):  
C. MARTIN ◽  
D. BOURGAULT ◽  
C. MICHEL ◽  
M. HERVIEU ◽  
B. RAVEAU
Keyword(s):  
Diffraction Study ◽  
Powder Diffraction ◽  
Rock Salt ◽  
Close Relationships ◽  
Double Perovskite ◽  
X Ray ◽  
Thallium Cuprates ◽  
Significant Difference ◽  
Oxygen Atoms

Two new thallium cuprates isostructural with the “1212” superconductors were synthesized. These materials do not exhibit any superconductivity in spite of the presence of Tl(III), contrary to the oxides such as Tl 2 Ba 2 CaCu 2 O 8 or Tl 2 Ba 2 Ca 2 Cu 3 O 10. Their X-ray powder diffraction study confirms their close relationships with the superconductor TlBa 2 CaCu 2 O 7, i.e., their structure is built up from distorted double rock salt-type layers [(TIO) (BaO)] intergrown with oxygen deficient double perovskite layers [ BaY ( CuO 2.5)2] or [ BaNd ( CuO 2.5)2]. Although the determination of the positions of the oxygen atoms cannot be considered as accurate, one significant difference with respect to TlBa 2 CaCu 2 O 7 must be pointed out: the oxygen atoms forming the basal planes of the CuO 5 pyramids are brought closer together along c, leading to an almost cubic environment for Y and Nd, whereas the CaO 8 prisms are elongated along c in the thallium superconductors.

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