Thermal Damage and Failure Mechanical Behavior of Granite After Exposure to Different High Temperature Treatments Under Uniaxial Compression

As Carbon-fiber-reinforced SiC-matrix (C/SiC) composites are widely used in high-temperature structural applications, its mechanical behavior at high temperature is important for the reliability of structures. In this paper, mechanical behavior of a kind of 2D C/SiC composite was investigated at temperatures ranging from room temperature (20C) to 600C under quasi-static and dynamic uniaxial compression. The results show the composite has excellent high temperature mechanical properties at the tested temperature range. Catastrophic brittle failure is not observed for the specimens tested at different strain rates. The compressive strength of the composite deceases only 10% at 600C if compared with that at room temperature. It is proposed that the decrease of compressive strength of the 2D C/SiC composite at high temperature is influenced mainly by release of thermal residual stresses in the reinforced carbon fiber and silicon carbon matrix and oxidation of the composite in high temperature atmosphere.

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Fracture Mechanical Behavior of Sandstone Subjected to High-Temperature Treatment and Its Acoustic Emission Characteristics Under Uniaxial Compression Conditions

Rock Mechanics and Rock Engineering ◽

10.1007/s00603-016-1011-3 ◽

2016 ◽

Vol 49 (12) ◽

pp. 4911-4918 ◽

Cited By ~ 31

Author(s):

Biao Kong ◽

Enyuan Wang ◽

Zenghua Li ◽

Xiaoran Wang ◽

Jie Liu ◽

...

Keyword(s):

Acoustic Emission ◽

High Temperature ◽

Mechanical Behavior ◽

Uniaxial Compression ◽

Temperature Treatment ◽

High Temperature Treatment ◽

Emission Characteristics

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Calculation and Analysis on the Thermal Damage at High Temperature

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.353-358.1191 ◽

2007 ◽

Vol 353-358 ◽

pp. 1191-1194

Author(s):

Song Hua Tang ◽

Ying She Luo ◽

Ming Zhe Ning ◽

Zhi Chao Wang

Keyword(s):

High Temperature ◽

Damage Mechanics ◽

Thermal Damage ◽

Thermal Stresses ◽

Equilibrium Equations ◽

Damage And Failure ◽

Main Factors ◽

New Research ◽

In Fire ◽

Integrated Structures

In fire resistant design traditional method based on experiment is being replaced by method based on calculation.in this paper Damage mechanics is applied to calculate and analyze the process of damage and failure of structures at high temperature through solving jointly the closed equations composed of the thermal damage evolving equation based on the residual strength, heat conduction equations, equilibrium equations, geometry equations and physics equations. An example of a truss is given to illustrate the calculation of thermal damages and stresses at high temperature. The results suggest, the bearing capacity at high temperature is influenced by these three main factors: thermal damage resulted from the elevated temperature, the thermal stresses and the original load. This provides a new research method for the modern fire-resistant design based on calculation and can be developed and applied in the numerical simulation of the process of damage and failure of the integrated structures.

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Application of TEM to Deformation, Wear, and Fracture of Ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052377 ◽

1974 ◽

Vol 32 ◽

pp. 472-473

Author(s):

B. J. Hockey

Keyword(s):

Wear Resistance ◽

High Temperature ◽

Mechanical Behavior ◽

Brittle Materials ◽

High Temperature Strength ◽

Wide Range ◽

Corrosive Environments ◽

Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

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