The uniaxial tensions for foam nickel ceramic specimens with different relative densities are carried out on a CSS-44020 Universal Electronic Test Machine at ambient temperature, and the uniaxial tensile tests at various strain rates and temperatures are performed as well. The effects of relative density, strain rate and temperature on the elastic modulus are investigated. It is found that the elastic modulus of the foam nickel ceramic material increases with the density and stain rate, while decreases with the temperature. Simultaneously, the effects of relative density, strain rate and temperature on the yield strength of the foam nickel ceramic material are studied. It is shown that the yield stress increases with relative density and strain rate, but is reversed with increasing temperature. The comparison between the calculated result and experimental data demonstrates that the theoretical model can well predict the mechanical behavior of foam nickel ceramic material.
foam nickel ceramicrelative density
Zhao Rongguo、Chen Chaozhong、Luo Xiyan
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Institute of Rheological Mechanics, Xiangtan University, Hunan 411105, P.R.China Key Laboratory of Advanced Materials and Rheological Properties of Ministry of Education, Xiangtan University, Hunan 411105, P.R.China
Institute of Rheological Mechanics, Xiangtan University, Hunan 411105, P.R.China
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