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Structural Engineering and Mechanics
  Volume 8, Number 3, September 1999 , pages 273-283

Verification and application of beam-particle model for simulating progressive failure in particulate composites
Xing JB, Yu LQ, Jiang JJ

    Two physical experiments are performed to verify the effectiveness of beam-particle model for simulating the progressive failure of particulate composites such as sandstone and concrete. In the numerical model, the material is schematized at the meso-level as an assembly of discrete, interacting particles which are linked through a network of brittle breaking beams. The uniaxial compressive tests of cubic and parallelepipedal specimens made of carbon steel rod assembly which are glued together by a mixture are represented. The crack patterns and load-displacement response observed in the experiments are in good agreement with the numerical results. In the application respect of beam-particle model to the particulate composites, the influence of defects, particle arrangement and boundary conditions on crack propagation is approached, and the correlation existing between the cracking evolution and the level of loads imposed on the specimen is characterized by fractal dimensions.
Key Words
    beam-particle model, particulate composites, progressive failure, meso-structure, fractal dimension
Xing JB, Yantai Univ, Dept Civil Engn, Yamtai, Peoples R China
Yantai Univ, Dept Civil Engn, Yamtai, Peoples R China
Tsing Hua Univ, Dept Civil Engn, Beijing 100084, Peoples R China

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