Effect of porosity on the fracture stress of powder materials in the ductile fracture mechanism

Фирстов, С. А.; Podrezov, Yu. N.; Lugovoi, N. I.; Malyshenko, A. A.; Zherdin, A. G.

doi:10.1007/bf00796260

Cited by 3 publications

(2 citation statements)

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“…Fleck and Smith [8] cite the following equation for the dependence of yield point on porosity: σ = σ 0 exp(1 − Θ 3/2 ) 2 , (2) where σ 0 is the strength of the pore-free body. Firstov et al [13] propose the following equation which is based on the assumption that the bearing surface of the porous body diminishes with increasing porosity in proportion to the probability that the pores fall within the projection of the broken surface:…”

Section: Introductionmentioning

confidence: 99%

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Effect of the structure of the pore space on the mechanical properties of highly porous materials produced with pore-forming agents

Boitsov

Chernyshev

Solonin

2006

Powder Metall Met Ceram

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621.762Correlation between the mechanical properties of porous materials obtained with use of a pore-forming agent, and the pore structures has been studied. It was shown that the larger the pores, the higher the bending strength and elastic modulus. The curve of mechanica properties versus porosity is S-shaped. A theoretical equation has been derived for this curve. The region of the bend in the S curve was established to correspond to the phase transition of the metallic claster from a quasi-three-dimensional to a quasi-two-dimensional structure.

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Section: Introductionmentioning

confidence: 99%

“…The interrelation between porosity and mechanical properties of materials has been under investigation for a considerable time, and many studies, for example [1][2][3][4][5][6][7][8][9][10][11][12][13] are devoted to this subject. Let us cite several general laws.…”

Section: Introductionmentioning

confidence: 99%