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Study on Pore Shape Effects on Mechanical and Conduction Properties

By Helmut J. Boehm (TU Wien)

The macroscopic and local responses of materials containing spherical or equi-axed polyhedral pores are studied via Finite Element models of periodic volume elements. Each volume element contains some 20 randomly positioned and, where appropriate, randomly oriented pores having the shapes of spheres, regular octahedra, cubes or regular tetrahedra. The elastic, elastoplastic and conduction behaviors of ensembles of such volume elements are evaluated for a pore volume fraction of 20%. Aspects of the modeling approach are discussed, predictions are compared to results from other methods, pore shape effects are examined, and comparisons to particle shape effects in composites are presented.

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