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Peridynamic Theory for Modeling Three-Dimensional Damage Growth in Metallic and Composite StructuresOterkus, Erkan January 2010 (has links)
A recently introduced nonlocal peridynamic theory removes the obstacles present in classical continuum mechanics that limit the prediction of crack initiation and growth in materials. It is also applicable at different length scales. This study presents an alternative approach for the derivation of peridynamic equations of motion based on the principle of virtual work. It also presents solutions for the longitudinal vibration of a bar subjected to an initial stretch, propagation of a pre-existing crack in a plate subjected to velocity boundary conditions, and crack initiation and growth in a plate with a circular cutout. Furthermore, damage growth in composites involves complex and progressive failure modes. Current computational tools are incapable of predicting failure in composite materials mainly due to their mathematical structure. However, the peridynamic theory removes these obstacles by taking into account non-local interactions between material points. Hence, an application of the peridynamic theory to predict how damage propagates in fiber reinforced composite materials subjected to mechanical and thermal loading conditions is presented. Finally, an analysis approach based on a merger of the finite element method and the peridynamic theory is proposed. Its validity is established through qualitative and quantitative comparisons against the test results for a stiffened composite curved panel with a central slot under combined internal pressure and axial tension. The predicted initial and final failure loads, as well as the final failure modes, are in close agreement with the experimental observations. This proposed approach demonstrates the capability of the PD approach to assess the durability of complex composite structures.
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EFFECTIVE WIDTH AND ULTIMATE STRENGTH OF CONTINUOUS COMPOSITE BEAMS.MOUSSA, ALBERT ELIAS. January 1987 (has links)
The primary objective of this study has been to examine the behavior of continuous composite beams. The investigation has been based on a nonlinear analysis of 15 composite floor systems. New design criteria have been proposed to calculate the effective width at mid-span and supports, at yield and at ultimate loads. New design equations have been developed to calculate the ultimate strength of a composite section in both positive and negative moment regions. Ductility and deflection characteristics have been studied and equations are proposed to calculate the deflection at service load.
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EFFECTIVE WIDTH OF COMPOSITE BEAMS WITH FORMED STEEL DECK.Vallenilla Solorzano, Cesar Rafael. January 1983 (has links)
No description available.
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Optical fibre witnesses of fatigue damage in composite materialsWaite, S. R. January 1988 (has links)
No description available.
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Processing induced surface finish effects for RTM glass mat thermoset compositesStewart, Rebecca L. January 2002 (has links)
No description available.
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The mechanical properties of partially bonded particulate materialsChandler, H. W. January 1983 (has links)
No description available.
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The origins and properties of transcrystalline layers in thermoplastics compositesHardwick, S. T. January 1987 (has links)
No description available.
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Development of Al-Mgâ‚‚Si in situ compositesPolley, Neal John January 2003 (has links)
No description available.
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The deformation of composite materials at high rates of tensile loadingWelsh, L. M. January 1983 (has links)
No description available.
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The durability of restorative materialsChadwick, R. D. January 1988 (has links)
No description available.
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