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Showing 1 to 10 of 10 for “"first-ply failure"”.
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Finite element analysis of geodesically stiffened cylindrical composite shells using a layerwise theory
… approach for studying the buckling of simply supported geodesically stiffened shells with discrete stiffeners. This method utilizes a Lagrange multiplier technique to attach the stiffeners to the shell. The development of the layerwise shells couples a one-dimensional finite element …
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Finite-element modeling of a composite bridge deck
… results and the experimental results. A failure analysis, based on maximum stress, maximum strain and Tsai-Wu theories of the Prodeck 8 is carried and first ply failure is determined. Finally, the Prodeck 8 is evaluated for critical load by performing a buckling analysis.
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Scaling Effects on Damage Development, Strength, and Stress-Rupture Life on Laminated Composites in Tension
The damage development and strength of ply-level scaled carbon/epoxy composite laminates having stacking sequence of [+Tn/-Tn/902n]s where constraint ply angle, T, was 0, 15, 30, 45, 60, and 75 degrees, and size was scaled as n=1,2,3, and 4, is reported in Part I. X-radiography was used to monitor …
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Reliability and failure analysis of composite beams and plates containing stress concentrations
… bending, ABAQUS is used. For stress and failure analysis of laminated composite plates under transverse loading, a nonlinear finite element analysis program ENCOMPLIT which accounts for the geometrical nonlinearity in von Karman sense and transverse shear deformation was developed. Both …
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Combined mechanical loading of composite tubes
… to correspond to the analytically predicted first ply failure. The observed nonlinear response thus appears to be due to a combination of material response at the ply level and gradual damage accumulation. Further, based on cyclic torsion tests, the failure of the tubes was found to be path …
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Nonlinear analysis of laminated fibrous composites
… the interlaminar stress distributions in cross-ply, angle-ply, and more complex laminates. Elastic results for the boundary layer effect are shown to compare favorably with existing numerical solutions. It is shown that for angle-ply laminates the fiber orientation for maximum stress due to …
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Local and Global Sensitivity Analysis of Thin Ply Laminated Carbon Composites
… orientation. Research has shown that decreasing ply thickness can reduce these interlaminar stress edge effects, and delay delamination in quasi-isotropic laminate specimen for laminates of equal total thickness. First ply failure stress has also been shown to increase with decreasing ply …
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Enviro-Mechanical Durability of Graphite/Epoxy Composite Materials
… quantities such as thermal residual stresses and first ply failure. Currently, no reliable methods are available in the literature to determine these values accurately. However, the model was able to predict the decrease in crack density at elevated temperatures. The increase in crack density for …
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ENHANCEMENT OF HIGH-SPEED FLYWHEEL ENERGY STORAGE VIA CARBON-FIBER COMPOSITE REINFORCEMENT
… material with higher strength (based on first ply failure strength) and lower density and lower elastic moduli for the disk than the rim material will yield high-speed and high-energy density. The materials designed based on the results from this study show outperformance compared to …
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The effect of specimen size on the mechanical response of laminated composite coupons loaded in tension and flexure
… four point flexure load/deflection response of ply- and sublaminate-level scaled composite specimens was investigated. Three laminates were studied in the tensile program, namely [+30/-30/90₂]<sub>ns</sub>, [+45/-45/0/90}<sub>ns</sub> and [90/0/90/0|<sub>ns</sub>, where n = 1, 2, 3, 4. Two …