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Effect of Pore Distribution on Elastic Stiffness and Fracture Toughness of Porous Materials

  • Letters in Fracture and Micromechanics
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Abstract

The paper focuses on experimental study of the effect of pore distribution on the mechanical properties of aluminum sheets containing multiple holes. Mechanical behavior of materials of uniform microstructure is compared with that of materials containing pore clusters of circular and elliptical shapes. The overall porosity of all specimens was 0.2. All the experiments were repeated 10 times. Our work demonstrates that overall elastic properties are almost insensitive to the actual distribution of pores – uniform or with distinguishable pore clusters. In contrast, fracture toughness of the specimens is strongly affected by the mutual positions of individual pores. Explicit connection between the fracture stress and minimum pore separation is obtained.

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Authors and Affiliations

  1. Department of Mechanical Engineering, New Mexico State University, Las Cruces, NM, 88001, USA

    Marcus Cramer & Igor Sevostianov

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  1. Marcus Cramer
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  2. Igor Sevostianov
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Correspondence to Igor Sevostianov.

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Cramer, M., Sevostianov, I. Effect of Pore Distribution on Elastic Stiffness and Fracture Toughness of Porous Materials. Int J Fract 160, 189–196 (2009). https://doi.org/10.1007/s10704-009-9416-6

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  • DOI: https://doi.org/10.1007/s10704-009-9416-6

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