Topic
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 article, a micromechanics-based framework is presented to predict effective elastoplastic behavior of two-phase particle-reinforced ductile matrix composites (PRDMCs) containing many randomly dispersed elastic spherical inhomogeneities.
74 citations
TL;DR: In this paper, an analytical unified method for determining the effective electroelastic properties of piezoelectric composites containing spatially oriented short fibers, which are treated as spheroidal inclusions, is presented.
74 citations
TL;DR: In this paper, a modified viscoplastic constitutive equations for homogeneous glassy polymers at isothermal loading, including strain softening and strain hardening, are proposed.
Abstract: In this work, experimental tests in tension on a RT-PMMA material have been achieved under various constant true strain rates and at room temperature. The volumetric dilatation was determined in real time during the deformation by videomeasurements. The experimental results have revealed the presence of both the nucleation and growth deformation mechanisms. Modified viscoplastic constitutive equations for homogeneous glassy polymers at isothermal loading, including strain softening and strain hardening, are proposed. Such a model is based upon an approach originally developed for metals at high temperature. Next, this modified model is coupled with a micromechanics formulation, using the Gurson–Tvergaard model, to investigate the macroscopic mechanical response of the RT-PMMA. The constitutive relation includes strain softening, strain hardening, strain rate sensitivity and void evolution. In the test conditions, the modified viscoplastic model coupled with the original Gurson–Tvergaard model produce quantitative agreement with experimental observations.
74 citations
TL;DR: In this paper, a clear demonstration of the potential of ribbon-shaped reinforcements in composite materials applications is presented from a micromechanics analysis, supported by experimental results, and it is pointed out that the low strength observed for glass-ribbon composites is a consequence of fabrication procedures and does not correspond to the theoretical limiting strength of ribbon reinforcements.
Abstract: : A clear demonstration of the potential of ribbon-shaped reinforcements in composite materials applications is presented. From a micromechanics analysis, supported by experimental results. Ribbon reinforcement offers superior stiffness properties in the plane of the lamina. The macromechanics analysis introduces the concept of a hybrid composite in which the engineer may combine the outstanding strength properties of fibers with the superior stiffness properties offered by ribbon reinforcements. It is pointed out that the low strength observed for glass-ribbon composites is a consequence of fabrication procedures and does not correspond to the theoretical limiting strength of ribbon reinforcements. The use of ribbon-shaped reinforcements also leads to composites which will have very small isotropic thermal expansion coefficients in the plane of the plate. Thus, ribbon reinforcements provide an attractive means of achieving intermediate to high performance composite possessing dimensional stability. (Author)
74 citations
TL;DR: In this article, the authors investigated the in-plane instability of functionally graded multilayer composite shallow arches reinforced with a low content of graphene platelets (GPLs) under a central point load.
74 citations