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  • Open Access


    Design and Deformation Behavior of Multi-phase Mechanical Metamaterials

    Huitian Wang1, Junjie You1, Sha Yin1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.25, No.2, pp. 1-1, 2023, DOI:10.32604/icces.2023.010417

    Abstract Strong and tough mechanical metamaterials are highly demanded in engineering application. Nature inspired dual-phase metamaterial composites was developed and examined, by employing architectured lattice materials with different mechanical properties respectively as the constituent matrix and reinforcement phases. Then, the reinforcement phase was incorporated into the matrix phase with specific patterning. The composite metamaterials were simply fabricated using additive manufacturing. From quasistatic compression tests, the strength and toughness could be simultaneously enhanced after the addition of reinforcement phase grains. Through simulation modeling, effects of dual-phase distribution, elementary architecture, parent material and defects on mechanical properties of More >

  • Open Access


    A Review of Experimental Research on the Mode I Fracture Behavior of Bamboo

    Yue Chen1,2, Haitao Li1,2,*, Lei Gao3,*, Wei Xu1,2, Rodolfo Lorenzo4, Milan Gaff5,6

    Journal of Renewable Materials, Vol.11, No.6, pp. 2787-2808, 2023, DOI:10.32604/jrm.2023.027634

    Abstract Bamboo is an eco-friendly material with light weight, high strength, short growth cycle and high sustainability, which is widely used in building structures. Engineered bamboo has further promoted the development of modern bamboo structures due to its unrestricted size and shape. However, as a fiber-reinforced material, fracture damage, especially Mode I fracture damage, becomes the most likely damage mode of its structure, so Mode I fracture characteristics are an important subject in the research of mechanical properties of bamboo. This paper summarizes the current status of experimental research on the Mode I fracture properties of More >

  • Open Access


    Toughening Mechanisms in Carbon Nanotube-Reinforced Amorphous Carbon Matrix Composites

    J.B. Niu1, L.L. Li2, Q. Xu1, Z.H. Xia1,3

    CMC-Computers, Materials & Continua, Vol.38, No.1, pp. 31-41, 2013, DOI:10.3970/cmc.2013.038.031

    Abstract Crack deflection and penetration at the interface of multi-wall carbon nanotube/amorphous carbon composites were studied via molecular dynamics simulations. In-situ strength of double-wall nanotubes bridging a matrix crack was calculated under various interfacial conditions. The structure of the nanotube reinforcement -ideal multi-wall vs. multi-wall with interwall sp3 bonding - influences the interfacial sliding and crack penetration. When the nanotube/matrix interface is strong, matrix crack penetrates the outermost layer of nanotubes but it deflects within the nanotubes with certain sp3 interwall bond density, resulting in inner wall pullout. With increasing the sp3 interwall bond density, the fracture mode More >

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