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Showing 1 to 14 of 14 for “"Hashin"”.
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Finite element models for predicting crack growth characteristics in composite materials
… modifications of the point stress and the Hashin failure criteria, are proposed to predict the direction of crack extension in composites. Comparisons are made with the Tsai-Wu failure criterion and the Sih strain energy density criterion as well as with experimental results. It is shown …
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Analysis of a Carbon Fiber Reinforced Polymer Impact Attenuator for a Formula SAE Vehicle Using Finite Element Analysis
<p>The Hashin failure criteria and damage evolution model for laminated fiber reinforced polymers are explored. A series of tensile coupon finite element analyses are run to characterize the variables in the physical model as well as modeling techniques for using an explicit dynamic solver for a …
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Micromechanical modeling of concrete at early age
… matrix are obtained. In addition, the elastic Hashin-Monteiro model is generalized to account for the effect of the interfacial transition zone properties on concrete creep. An effective computational platform was developed to evaluate operator expressions in order to obtain relaxation and …
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Response and Failure of Internally Pressurized Elliptical Composite Cylinders
… of failure using the maximum stress and Hashin failure criteria and geometrically linear and nonlinear analyses is presented for elliptical cylinders. These failure criteria involve interlaminar shear stresses which are computed by integrating the equilibrium equations of elasticity …
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Evaluation of reaction kinetics and material properties of cementitious ceramic materials using ultrasonic velocity and attenuation measurements
… of the elastic moduli is compared with the Hashin and Shtrikman theoretical bounds for the elastic moduli of two-phase materials. All data lie between these bounds, suggesting that the alumina particles were well dispersed and well bonded to the matrix. However, the fact that the data are …
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Local buckling and crippling of composite stiffener sections
… shows the compressive fiber mode criterion of Hashin correlates reasonably well with the first detectable damage event. Equilibrium is used to develop interlaminar stress equations for classical laminated plate theory that require high order derivatives of the displacements. Derivatives …
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On developing a graphitic white iron for metal-to-metal wear systems
… volume percent for any given composition, and a Hashin-Shtrikman model was used to predict the thermal diffusivity of the multiphase alloy. Abrasive and adhesive wear resistance was found to depend upon composite hardness and graphite volume percent. It was found that 1 vol.% graphite was …
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A DEM for visualising damage evolution and predicting failure of composite lamina under uniaxial and biaxial loads
… with experiments and analytical method such as Hashin and Puck models.
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Optimization of Geometric Parameters for a Deployable Space Structure
… on the design variables and objectives and the Hashin damage criteria are used to ensure wrapping does not cause material failure. Three optimization runs from different initial designs are completed using SHERPA and genetic algorithm optimization methods. The results are compared to determine …
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Failure Initiation and Progression in Internally Pressurized Non-Circular Composite Cylinders
… maximum stress criterion and the interactive Hashin and Tsai-Wu criteria. The second part of the results shows that leakage occurs due to a combination of matrix tensile and compressive, fiber tensile and compressive, and inplane shear failure modes in all three cylinders. Leakage develops …
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Optimization of Tapered Deployable Space Structures
… will be checked for material failure using Hashin Damage Criterion. Finding a design that satisfies mission requirements and maintains structural integrity during wrapping and deployment will be challenging and computationally expensive. The optimization simulation presented in this paper …
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Experimental and computational micromechanical study of fiber-reinforced polymers
… con las predicciones de los criterios de Hashin y Puck para el fallo de laminados. Fiber-reinforced polymers (FRPs) exhibit outstanding mechanical properties, ideal for their use in structural applications. Due to the high specific values of stiffness and strength, these composites are …
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Random delamination of graphite/epoxy laminated composites : stress analysis, failure criteria, experimental characterization and stochastic modeling
… based on the Malmeister strength theory and Hashin assumption. The intent of the developed criteria is to include the effects of [straight theta]-dependent and directionally-dependent interlaminar strengths into the failure evaluation of laminated composites, as demonstrated by the …
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Well-log based determination of rock thermal conductivity in the North German Basin
… arithmetic mean, geometric mean, harmonic mean, Hashin-Shtrikman mean, and effective-medium theory mean). It is found that the geometric-mean model shows the best correlation between calculated and measured bulk thermal conductivity. However, by applying new model-dependent correction, equations …