Experimental research on the influence of loading rate on the mechanical properties of limestone in a high-temperature state

2018 ◽  
Vol 78 (5) ◽  
pp. 3479-3492 ◽  
Author(s):  
Qingbin Meng ◽  
Mingwei Zhang ◽  
Lijun Han ◽  
Hai Pu ◽  
Yanlong Chen
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Experimental Research ◽  
Loading Rate ◽  
Temperature State

Effects of Temperature and Loading Rate on the Mechanical Properties of a High Temperature Epoxy Adhesive

2011 ◽  
Vol 25 (18) ◽  
pp. 2461-2474 ◽  
Author(s):  
M. D. Banea ◽  
F. S. M. de Sousa ◽  
L. F. M. da Silva ◽  
R. D. S. G. Campilho ◽  
A. M. Bastos de Pereira
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Loading Rate ◽  
Epoxy Adhesive ◽  
Effects Of Temperature

Experimental Research and ANSYS Analysis of Temperature Field of Concrete Specimens Reinforced by Paste Method in the Fire

2013 ◽  
Vol 405-408 ◽  
pp. 2677-2680
Author(s):  
Yan Bo Li ◽  
Jian Zhong Liu ◽  
Su Juan Fu
Keyword(s):  
Mechanical Properties ◽  
Temperature Field ◽  
High Temperature ◽  
Experimental Research ◽  
Fire Retardant ◽  
Experimental Results ◽  
Temperature Fields ◽  
Ansys Analysis ◽  
Reinforcement Material ◽  
The Impact

In this paper, the temperature fields of concrete specimens reinforced by paste method were analyzed by experiment and ANSYS in the fire, it proved that the impact of reinforcement material on the temperature field of the specimens can be ignored, it identified that the best thickness of the fire-retardant coating is 40mm for steel-confined specimens and 50mm for CFRP-confined specimens. The calculations agreed well with the experimental results, it provides conditions for mechanical properties of the concrete reinforced by paste method at high temperature.

scholarly journals Experimental research of loading rate effect on brittle-ductile transition of mudstone under high temperature

2019 ◽  
Vol 23 (Suppl. 3) ◽  
pp. 959-965
Author(s):  
Lianying Zhang ◽  
Chao Ma ◽  
Zhongqiang Zhang ◽  
Bing Li ◽  
Lei Lei
Keyword(s):  
High Temperature ◽  
Experimental Research ◽  
Loading Rate ◽  
Mechanical Tests ◽  
Test System ◽  
Yield Strain ◽  
Brittle Ductile Transition ◽  
High Temperature Furnace ◽  
Hydraulic Servo ◽  
Temperature Furnace

To investigate the brittle ductile transformation characteristics of mudstone under high temperature, the MTS810 electro mechanical hydraulic servo test system and matched high temperature furnace MTS652.02 are used to perform mechanical tests to study the influence of loading rate on the yield strain and ductility coefficient of the mudstone at high temperatures.

Lattice Imaging of Grain Boundaries in Ceramics

1977 ◽  
Vol 35 ◽  
pp. 114-115
Author(s):  
D. R. Clarke ◽  
G. Thomas
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Silicon Nitride ◽  
Grain Boundaries ◽  
High Temperature Strength ◽  
Current Interest ◽  
Lattice Imaging ◽  
Special Significance ◽  
Structural Applications ◽  
Refractory Ceramics

Grain boundaries have long held a special significance to ceramicists. In part, this has been because it has been impossible until now to actually observe the boundaries themselves. Just as important, however, is the fact that the grain boundaries and their environs have a determing influence on both the mechanisms by which powder compaction occurs during fabrication, and on the overall mechanical properties of the material. One area where the grain boundary plays a particularly important role is in the high temperature strength of hot-pressed ceramics. This is a subject of current interest as extensive efforts are being made to develop ceramics, such as silicon nitride alloys, for high temperature structural applications. In this presentation we describe how the techniques of lattice fringe imaging have made it possible to study the grain boundaries in a number of refractory ceramics, and illustrate some of the findings.

TEM Studies of Grain Boundary Films in Si3N4 Ceramics

1991 ◽  
Vol 49 ◽  
pp. 930-931
Author(s):  
H.-J. Kleebe ◽  
J.S. Vetrano ◽  
J. Bruley ◽  
M. Rühle
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Silicon Nitride ◽  
Hot Isostatic Pressing ◽  
Amorphous Film ◽  
Liquid Phase Sintering ◽  
Second Phase ◽  
High Temperature Mechanical Properties ◽  
Triple Points ◽  
Boundary Films

It is expected that silicon nitride based ceramics will be used as high-temperature structural components. Though much progress has been made in both processing techniques and microstructural control, the mechanical properties required have not yet been achieved. It is thought that the high-temperature mechanical properties of Si3N4 are limited largely by the secondary glassy phases present at triple points. These are due to various oxide additives used to promote liquid-phase sintering. Therefore, many attempts have been performed to crystallize these second phase glassy pockets in order to improve high temperature properties. In addition to the glassy or crystallized second phases at triple points a thin amorphous film exists at two-grain junctions. This thin film is found even in silicon nitride formed by hot isostatic pressing (HIPing) without additives. It has been proposed by Clarke that an amorphous film can exist at two-grain junctions with an equilibrium thickness.

AEM of reaction-bonded SiC

1992 ◽  
Vol 50 (1) ◽  
pp. 344-345
Author(s):  
K Das Chowdhury ◽  
R. W. Carpenter ◽  
W. Braue
Keyword(s):  
Mechanical Properties ◽  
Phase Transformation ◽  
High Temperature ◽  
Epitaxial Growth ◽  
Liquid Silicon ◽  
Structural Ceramic ◽  
Few Data

Research on reaction-bonded SiC (RBSiC) is aimed at developing a reliable structural ceramic with improved mechanical properties. The starting materials for RBSiC were Si,C and α-SiC powder. The formation of the complex microstructure of RBSiC involves (i) solution of carbon in liquid silicon, (ii) nucleation and epitaxial growth of secondary β-SiC on the original α-SiC grains followed by (iii) β>α-SiC phase transformation of newly formed SiC. Due to their coherent nature, epitaxial SiC/SiC interfaces are considered to be segregation-free and “strong” with respect to their effect on the mechanical properties of RBSiC. But the “weak” Si/SiC interface limits its use in high temperature situations. However, few data exist on the structure and chemistry of these interfaces. Microanalytical results obtained by parallel EELS and HREM imaging are reported here.

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