The Study of Equipment for Testing High Temperature Elastic Modulus Based on the Acoustical Resonance Method

2013 ◽  
Vol 544 ◽  
pp. 476-480
Author(s):  
Yi Fu Qiu ◽  
Qin Zhou Niu ◽  
Yan Qiu ◽  
Yi Wang Bao
Keyword(s):  
Experimental Data ◽  
Elastic Modulus ◽  
High Temperature ◽  
Softening Point ◽  
Resonance Method ◽  
Great Accuracy ◽  
The Self ◽  
Testing Device ◽  
Accuracy And Repeatability

A self-designed testing device for high-temperature elastic modulus was developed based on the principle of acoustical resonance, having great accuracy and repeatability. Experiment was made to test the elastic modulus of two kinds of glass. The experimental data showed that compared with normal glass, Al2O3•SiO2 glass was the 1.2 times the value of elastic modulus of normal glass and had greater stability than normal glass in high temperature. The softening point temperatures of Al2O3•SiO2 glass and normal glass were respectively 600°C and 400°C. The self-designed testing device was able to estimate the property of glass.

Investigation of High Temperature Elastic Modulus and Internal Friction of SOFC Electrolytes Using Resonance Method

2019 ◽  
Vol 25 (2) ◽  
pp. 1673-1677 ◽  
Author(s):  
Takuto Kushi ◽  
Kazuhisa Sato ◽  
Atsushi Unemoto ◽  
Koji Amezawa ◽  
Tatsuya Kawada
Keyword(s):  
Elastic Modulus ◽  
High Temperature ◽  
Internal Friction ◽  
Resonance Method ◽  
Sofc Electrolytes

S0305-3-2 Investigation of Elastic Modulus and Internal Friction of SOFC Electrolytes at High Temperature Using Resonance Method

2009 ◽  
Vol 2009.1 (0) ◽  
pp. 235-236
Author(s):  
Takuto KUSHI ◽  
Kazuhisa SATO ◽  
Atsushi UNEMOTO ◽  
Koji AMEZAWA ◽  
Tatsuya KAWADA
Keyword(s):  
Elastic Modulus ◽  
High Temperature ◽  
Internal Friction ◽  
Resonance Method ◽  
Sofc Electrolytes

scholarly journals Effective Elastic Properties of 3D Carbon-Carbon Composites at High Temperature

1996 ◽  
Vol 5 (2) ◽  
pp. 096369359600500
Author(s):  
X.D. He ◽  
J.C. Han ◽  
S.Y. Du
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Elastic Modulus ◽  
High Temperature ◽  
Finite Element Model ◽  
Tensile Properties ◽  
Elastic Properties ◽  
Element Model ◽  
Carbon Composites ◽  
Fiber Spacing

This paper describes a mini-finite element model for evaluation of high temperature elastic modulus of 3D C/C composite and the variation of tensile properties with substrate parameters such as xy-woven layers, fiber boundles and fiber spacing was analyzed. The results predicted suit the experimental data well.

Effect Of Elevated Temperatures On Complete Concrete Deformation Diagrams

2019 ◽  
pp. 9-14
Keyword(s):  
Experimental Data ◽  
Elastic Modulus ◽  
Elevated Temperatures ◽  
Peak Load ◽  
Relative Deformation ◽  
Deformation Characteristics ◽  
Compression Tests ◽  
Strain Behavior ◽  
Different Temperatures ◽  
Deformation Diagrams

The analysis of the previous results of the study on concrete stress-strain behavior at elevated temperatures has been carried out. Based on the analysis, the main reasons for strength retrogression and elastic modulus reduction of concrete have been identified. Despite a significant amount of research in this area, there is a large spread in experimental data received, both as a result of compression and tension. In addition, the deformation characteristics of concrete are insufficiently studied: the coefficient of transverse deformation, the limiting relative compression deformation corresponding to the peak load and the almost complete absence of studies of complete deformation diagrams at elevated temperatures. The two testing chambers provided creating the necessary temperature conditions for conducting studies under bending compression and tension have been developed. On the basis of the obtained experimental data of physical and mechanical characteristics of concrete at different temperatures under conditions of axial compression and tensile bending, conclusions about the nature of changes in strength and deformation characteristics have been drawn. Compression tests conducted following the method of concrete deformation complete curves provided obtaining diagrams not only at normal temperature, but also at elevated temperature. Based on the experimental results, dependences of changes in prism strength and elastic modulus as well as an equation for determining the relative deformation and stresses at elevated temperatures at all stages of concrete deterioration have been suggested.

A Dynamic Test of Fully Prestressed Concrete Beams

2011 ◽  
Vol 368-373 ◽  
pp. 2483-2490
Author(s):  
Yao Ting Zhang ◽  
Yi Zheng ◽  
Hong Jian Li
Keyword(s):  
Experimental Data ◽  
Elastic Modulus ◽  
Theoretical Analysis ◽  
Natural Frequency ◽  
Axial Force ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
Dynamic Test ◽  
Modified Formula

A dynamic test of two unbonded fully prestressed concrete beams has been conducted. The results indicate that the natural frequency of beams increases with the prestress force, which is opposite to the analytical arguments for homogeneous and isotropic beams subject to axial force. This paper explains the change in frequencies by discussing the change in the elastic modulus. A modified formula is also proposed, and the experimental data agree well with the theoretical analysis.

Influence of Cu addition on the self-propagating high-temperature synthesis of Ti5Si3 in Cu–Ti–Si system

2008 ◽  
Vol 111 (2-3) ◽  
pp. 463-468 ◽  
Author(s):  
H.Y. Wang ◽  
S.J. Lü ◽  
M. Zha ◽  
S.T. Li ◽  
C. Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
The Self ◽  
Temperature Synthesis ◽  
High Temperature Synthesis

Self-propagating high-temperature synthesis microalloying of MoSi2 with Nb and V

2003 ◽  
Vol 18 (8) ◽  
pp. 1842-1848 ◽  
Author(s):  
F. Maglia ◽  
C. Milanese ◽  
U. Anselmi-Tamburini ◽  
Z. A. Munir
Keyword(s):  
Solid Solution ◽  
High Temperature ◽  
Tetragonal Phase ◽  
Synthesis Method ◽  
The Self ◽  
Alloying Elements ◽  
Alloying Element ◽  
Temperature Synthesis ◽  
Starting Mixture ◽  
High Temperature Synthesis

Microalloying of MoSi2 to form Mo(1−x)MexSi2 (Me = Nb or V) was investigated by the self-propagating high-temperature synthesis method. With alloying element contents up to 5 at.%, a homogeneous C11b solid solution was obtained. For higher contents of alloying elements, the product contained both the C11b and the hexagonal C40 phases. The relative amount of the C40 phase increases with an increase in the content of alloying metals in the starting mixture. The alloying element content in the hexagonal C40 Mo(1−x)MexSi2 phase was nearly constant at a level of about 12 at.% for all starting compositions. In contrast, the content of the alloying elements in the tetragonal phase is considerably lower (around 4 at.%) and increases slightly as the Me content in the starting mixture is increased.

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