A geometric model for the fracture toughness of porous materials

作者：Jelitto H^*; Schneider G A

来源：Acta Materialia, 2018, 151: 443-453.

DOI：10.1016/j.actamat.2018.03.018

• Fracture toughness
• Toughness
• Elastic properties
• Porosity
• Modeling

Different models for the fracture toughness, K-IC, of porous materials have been proposed to describe K-IC as a function of the porosity P. They have in common that beside P at least one additional parameter exists that has to be adjusted to the measured data. Based on the cubic structure, we present a geometrical 3D model without any arbitrary parameter, which predicts the K-IC, the toughness, G(C) , and the Young's modulus, E, of a porous material. The model comprises three variants, depending on the material properties like open or closed porosity. It is in good agreement with a large amount of experimental data from different research groups.

• 出版日期2018-6-1