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Showing 1 to 20 of 57 for “"stacking sequence"”.
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Optimal stacking sequence design of stiffened composite panels with cutouts
… and designer. First, the problem of laminate stacking sequence design is discrete in nature which complicates the solution process. Second, many local optima with comparable performance may be found. The present work addresses these challenges by investigating several techniques for designing …
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Effect of Stacking Sequence and Fiber Orientation on the Stress-Strain Behavior of CFRP Confined Concrete Cylinders
… in the literature to examine the effect of stacking sequence and fiber orientation on the compressive behavior of fiber reinforced polymer (FRP) confined concrete. This thesis presents the results of an experimental investigation examining the effect of parameters such as fiber orientation, …
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Projectile impact damage in filament wound CFRP tubes : effect of stacking sequence on projectile kinetic energy dissipation
The effect a change in laminate stacking sequence has on its ability to dissipate projectile kinetic energy has been investigated. T800 carbon fibre filament wound tubes in an epoxy matrix are investigated, having the following lay-up; laminate A - [-35°/35°/90°3/-35°/+35°/90°3/-35°/+35°] and …
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Effect of cooling rate and stacking sequence on the fatigue behavior of notched quasi-isotropic APC-2 laminates
The effect of cooling rate and stacking sequence on fatigue behavior was analyzed for notched quasi-isotropic APC-2 laminates. The fatigue behavior of fast (475° F/min) and slow (1° F/min) cooled specimens of the following two layups was studied: Layup A of (-45/0/45/90), and Layup B of …
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Failure analysis of a quasi-isotropic laminated composite plate with a hole in compression
… made of laminates with various quasi-isotropic stacking sequences. Different stacking sequences are achieved by rotating a [±45/90/0]s stacking sequence laminate as a whole with respect to the loading axis of the specimens. Two- and three-dimensional finite element models, using commercial …
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Fatigue response of notched graphite--epoxy laminates
… 0] s (type B) were considered and the effects of stacking sequence were compared. Nondestructive testing techniques such as X-radiography, moire technique, acoustic emission, deply technique, and stiffness change were performed to observe damage development. Static properties and damage initiation …
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Minimum-weight design of compressively loaded stiffened panels for postbuckling response
… and modal interaction. The effect of laminate stacking sequence is also investigated. The current design procedure requires the stacking sequence to be prescribed, proving to be a limitation in the design procedure.
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Hierarchical material models with microstructure for nonlinear analysis of progressive damage in laminated composite structures
… and a sublaminate model for a repeating ply stacking sequence. Newly developed orthotropic elastic-degrading (ED) material models are formulated in order to represent the nonlinear brittle behavior of the matrix constituent. As a result, progressive damage behavior of a lamina is effectively …
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Interlaminar stresses in composite laminates: a perturbation analysis
… the sign of σ<sub>𝒛</sub> depends upon the stacking sequence, while for angle-ply laminates is σ<sub>𝒛</sub> independent of the stacking sequence and is always a finite maximum tensile value at the free edge. Moreover, the results for bidirectional laminates compare favorably with Pipes’ …
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Stiffness and Strength Predictions of Discontinuous Fiber Composites
… A unique randomly-generated and non-symmetric stacking sequence is assigned to each RLVE. Experimentally-observed variations in the stiffness of a DFC part are then simulated by performing many FE analyses, where a new random stacking sequence is generated for each RLVE during each analysis. …
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Finite element stress analysis of idealized composite damage zones
… edge depending upon the fiber orientations and stacking sequence. 4. The boundary layer associated with the damage zone extends as far or farther into the interior of the laminate as does the free edge effect, depending on fiber orientation and stacking sequence. 5. Only laminated materials with …
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A Homogenization Approach for Design and Simulation of Blast Resistant Composites
… examines homogeneous plates and the optimal stacking sequence and plate thicknesses are determined. The second and third case studies use the homogenization method to calculate the properties of composite unit cell made of two different materials. The methods are integrated with dynamic …
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Optimal structural design for maximum buckling load
… bending stiffness is found. That is, for a given stacking sequence of ply orientations, we showed an existence of a design with the same bending stiffness matrix and same total thickness even when the stacking sequence is changed.
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An x-ray study of the structure of K1-xRbxCy
… to either super-order or phase separate. The stacking sequence is independent of alloy composition and is identical to the stacking sequence in KC8 as well as in RbC8. The carbon-carbon bond length appears not to change with alloy composition. By comparing the diffusion constants from a …
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Probability-based stability analysis of a laminated composite plate under combined in-plane loads
… showing the effects of thickness ratio, stacking sequence, and number of layers on the probabilistic stability of the plates.
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The effect of thickness on the fracture behavior of graphite/bismaleimede laminates with central circular holes
… 40 ply, and 80 ply quasi-isotropic laminates of stacking sequence [0/ ± 45/90]. Both unnotched and notched laminates were tested. Unnotched strength was found to be inversely proportional to thickness. Notched strengths were compared to three different failure models based on the stress …
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Scaling Effects on Damage Development, Strength, and Stress-Rupture Life on Laminated Composites in Tension
… 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 damage developments. First-ply failure stress, …
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Compressive strength prediction for composite unmanned aerial vehicles
… alphaG, in [+alphaG]n or [-alpha G]n stacking sequence.
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Finite element analysis of anisotropic viscoelastic composite structures and analytical determination of optimum viscoelastic material properties
… and angle ply laminates are calculated and the stacking sequence effects of the laminates are discussed in detail. Creep responses for GY70/339 composite laminates with or without a circular hole are also studied. The numerical results compare favorably with analytical solutions, i.e. within …
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Optimal Parameters for Doubly Curved Sandwich Shells, Composite Laminates, and Atmospheric Plasma Spray Process
… and the Tsai-Wu failure criterion to find the stacking sequence of composite laminates and the topology and materials for doubly curved sandwich shells to maximize the first failure load. It is followed by the progressive failure analysis to determine the ultimate failure load. For the sandwich …
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