Failure wave as resonance excitation of collective burst modes of defects in shocked brittle materials

AbstractIn order to make sense of the dynamic response of brittle materials under the certain range of impact strength, the numerical simulation for two kinds of representative ones glass and ceramic are conducted, in which the elastic micro-crack damage model is used. The plane impact experiments of ceramic and glass are summarized, which are used to compare with the simulation results. The simulation results show that the dynamic responses of brittle materials, failure wave and the plastic-like response appeared in glass and ceramic respectively are depended on their micro-cracks distribution in meso-scale. And moreover, both of failure wave and the plastic-like response are controlled by the same mechanism, and the different phenomena are just influenced by the size and distribution of the micro-cracks.

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Fracture Model of the Failure Wave in the Shocked Brittle Materials

Advanced Materials Research ◽

10.4028/scientific5/amr.446-449.3718 ◽

2012 ◽

Vol 446-449 ◽

pp. 3718-3721

Author(s):

Guo Wen Yao ◽

Zheng Jie Zhou ◽

Xiao Wei Feng

Keyword(s):

Brittle Materials ◽

Fracture Model ◽

Failure Wave

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Modeling of failure wave propagation in impact compression of brittle materials (Glasses)

Mechanics of Solids ◽

10.3103/s0025654412020112 ◽

2012 ◽

Vol 47 (2) ◽

pp. 242-251 ◽

Cited By ~ 1

Author(s):

S. A. Medin ◽

A. N. Parshikov

Keyword(s):

Wave Propagation ◽

Brittle Materials ◽

Impact Compression ◽

Failure Wave

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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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