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Micromechanics
About: Micromechanics is a research topic. Over the lifetime, 6000 publications have been published within this topic receiving 162635 citations.
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TL;DR: In this paper, the effective behavior of a micro-cracked linear viscoelastic solid is determined using the linear relationship between the macroscopic strain and the local displacement discontinuity across the crack.
Abstract: This article aims at the determination of the effective behavior of a microcracked linear viscoelastic solid Due to the nonlinearity of the strain concentration in the cracks, the latter cannot be derived directly from a combination of the correspondence theorem with the Eshelby-based homogenization schemes The proposed alternative approach is based on the linear relationship between the macroscopic strain and the local displacement discontinuity across the crack An approximation of the effective behavior in the framework of a Burger model is derived analytically
53 citations
TL;DR: In this paper, the effect of geometry on interfacial micromechanical behavior of fiber/matrix microdroplets is investigated by means of the combination of microbond test and Micro-Raman spectroscopy.
53 citations
TL;DR: In this article, the effects of carbon nanotubes on the mechanical behavior of elastomeric materials are investigated and a constitutive model for the large strain deformation behavior of MWNT-elastomer composites is developed.
Abstract: The effects of carbon nanotubes on the mechanical behavior of elastomeric materials is investigated. The large deformation uniaxial tension and uniaxial compression stress–strain behaviors of a representative elastomer are first presented. This elastomer is then reinforced with multi-wall carbon nanotubes (MWNTs) and the influence of weight fraction of MWNTs on the large deformation behavior of the resulting composite is quantified. The initial stiffness and subsequent strain-induced stiffening at large strains are both found to increase with MWNT content. The MWNTs are also found to increase both the tensile strength and the tensile stretch at break. A systematic approach for reducing the experimental data to isolate the MWNT contribution to the strain energy of the composite is presented. A constitutive model for the large strain deformation behavior of MWNT-elastomer composites is then developed. The effects of carbon nanotubes are modeled via a constitutive element which tracks the stretching and rotation of a distribution of wavy carbon nanotubes. The MWNT strain energy contribution is due to the bending/unbending of the initial waviness and provides the increase in initial stiffness as well as the retention and further enhancement of the increase in stiffness with large strains. The model is shown to track the stretching and rotation of the CNTs with macroscopic strain as well as predict the dependence of the macroscopic stress–strain behavior on the MWNT content for both uniaxial tension and uniaxial compression.
52 citations
TL;DR: In this paper, Monte Carlo simulation is used to assess the effects of microstructural randomness on the local stress response of composite materials, where the mean, variance and spectral density functions describing the randomly varying elastic properties are required as input.
52 citations
TL;DR: In this paper, a micromechanics model was developed for damage and failure analyses of laminated fibrous composite structures, which allowed the load transfer from cracked matrix to surrounding fibers until the fibers came to failure.
52 citations