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Showing 1 to 14 of 14 for “"particulate composite"”.
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Constitutive analysis and extrusion modeling of 6061 alloy and particulate composite
… analysis of the alloy and three metal matrix composites previously tested (10%Al 2 O 3 /6061, 15%SiC/6061, and 20%Al 2 O 3 /6061). The flow stresses decrease with increasing deformation temperature and the rate at which this occurs increases with percent reinforcement. Flow stress as a …
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Parametric modeling of bolted joints between components made of particulate composite materials
Particulate metal matrix composites (MMC) exhibit higher stiffness, strength and wear resistance compared to metal alloys. They exhibit superior compressive and buckling strength because of their higher plastic modulus. MMC's can operate at very higher temperatures than fiber-reinforced polymer …
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A study of near tip phenomena for cracks in a particulate composite
An experimental investigation using grids with a frequency of 125 lines/in. (5 lines/mm) was performed on inert propellant and pure binder at two different global head rates of 0.1 in./min (2.5 mm/min) and 1.0 in./min (25.4 mm/min). From the extracted data, displacements, strains, and dominant …
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Particulate composite material internal deformation measurements using x-ray microtomography and digital volume correlation
Typical particulate composites used in engineering applications consist of complex microstructures with a range of particulate sizes and often high particulate volume fractions (65%-95%). Examples of these are, explosives and rocket propellants for defense and aerospace applications, asphalt …
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IGFEM-based reduced-order modeling and design of nonlinear composites
… nonlinear solver to model the failure of composite materials is developed using an Interface-enriched Generalized Finite Element Method (IGFEM). Cohesive interfacial failure and damage mechanisms in the constituents are the primary source of nonlinearity and the shape of material …
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A Biomimic Self-healing Shape Memory Polymer Based Syntactic Foam for Smart Structural Composites
… service life extension in structural polymeric composites. The objective was to self-heal structural-length scale damage in an autonomous, efficient, timely and repeatable manner at the molecular-length scale. Self-healing is achieved through a novel two step close-then-heal (CTH) self-healing …
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ΣΚΕΔΑΣΗ ΘΕΡΜΟΕΛΑΣΤΙΚΩΝ ΚΥΜΑΤΩΝ ΣΕ ΣΥΝΘΕΤΑ ΥΛΙΚΑ ΚΑΙ ΠΡΟΣΔΙΟΡΙΣΜΟΣ ΤΩΝ ΘΕΡΜΟΜΗΧΑΝΙΚΩΝ ΤΟΥΣ ΙΔΙΟΤΗΤΩΝ
… OF DYNAMIC THERMOMECHANICAL PROPERTIES OF A PARTICULATE COMPOSITE IS PROPOSED AND AN APPLICATION FOR APARTICULATE COMPOSITE WITH RIGID, THERMAL INSULATED SPHERICAL INCLUSIONS IS INCLUDED.
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Species Dependence of pMDI/Wood Adhesion
… (pMDI) has increasingly been used in the wood particulate composite industry. Wood composites, especially oriented strand board (OSB) are made with many variations of wood species. Little research has been done to investigate how pMDI adhesion has been affected by species. The present is …
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Modeling the effect of debonding on the constitutive response of heterogeneous materials
Experimental studies have observed that particulate composite systems experience damage in three principal modes: failure of the interface between particle and binder; tearing of the matrix; and fracture of the particle. Interfacial debonding is often a precursor to the other failure processes and …
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Influence of storage environment upon crack opening and growth in composite solid rocket propellant
… temperature, loading rate, and thickness on this particulate composite, tests were conducted at three temperatures and two loading rates. Both uncracked and edge cracked "biaxial" specimens were produced from solid rocket propellant. The stress relaxation modulus and stress-strain data were …
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An evaluation of the Iosipescu specimen for composite materials shear property measurement
… shear test for unidirectional and cross-ply composites is used to assess the uniformity of the shear stress field in the vicinity of the notch, and demonstrate the effect of the nonuniform stress field upon the strain gage measurements used for the determination of composite shear moduli. …
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Multiscale design of nonlinear materials using a shape optimization scheme based on an interface-enriched GFEM
… we develop and implement a method to design particulate composites at the mesoscale using a shape optimization scheme to minimize or maximize a nonlinear cost function at the macroscale while satisfying a set of constraints associated, for example, with the volume fraction of inclusions or …
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Development of differential scheme micromechanics modeling framework for predictions of hot-mix asphalt (HMA) complex modulus and experimental validations
… asphalt binder phase up to a very highly packed composite of dense HMA mixtures were produced in the lab by progressively increasing the aggregate volume concentration in the composite from 0 to nearly 0.9. These various mixtures were tested in the Hollow Cylinder Tensile Tester (HCT) to obtain …
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Leveraging Carbon Based Nanoparticle Dispersions for Fracture Toughness Enhancement and Electro-mechanical Sensing in Multifunctional Composites
… are added to polymeric materials to create a nanocomposite material. The effects of this nanoparticle addition (a.k.a reinforcement) on the mechanical properties of the nanocomposite polymer materials are studied. Specifically, efforts are focused on studying fracture toughness, a material …