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  • Identification of the material parameters of a unidirectional fiber composite using a micromodel = Identifikacija parametrov materiala enosmernega kompozita z uporabo mikromodela
    Srbová, Hana ; Kroupa, Tomáš ; Zemčík, Robert
    The paper is focused on the identification of material parameters of the substituents of an unidirectional carbon-epoxy long-fiber-reinforced composite. Simple tensile tests using thin coupons with ... various fiber orientations were performed and force-displacement diagrams were obtained. A model of a unit cell is created in MSC.Marc. Fibers are considered to form a non-linear, elastic, transversely isotropic material and the matrix is considered to be an elasto-plastic isotropic material. The unit cell is loaded by a uniaxial stress up to the same level of loadings as the experimental samples. The sum of the squared differences of displacements between the numerically and experimentally obtained force-displacement diagrams is minimized within an identification process. The parameters of the linear relation between the Young's modulus of fibers and strain in the fiber-axis direction, and three shape coefficients of the matrix work-hardening function are searched. The identification process is performed using the MSC.Marc, OptiSlang optimization software and Matlab.
    Vir: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 46, št. 5, sep.-okt. 2012, str. 431-434)
    Vrsta gradiva - članek, sestavni del
    Leto - 2012
    Jezik - angleški
    COBISS.SI-ID - 940202

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