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Optical Performance Predictions and Testing of a Composite Reflector
This paper describes the structural analysis and the experimental performance evaluation of advanced composite mirror designs for future NASA astrophysics missions. An interdisciplinary...

Curvature Effects on the Deflection and Vibration of Cross-Ply Shallow Shells
The use of high performance materials is becoming increasingly significant in structures subjected to severe loading conditions. Effects of curvature on the stiffness characteristics of...

Poisson Instability of Laminated Composite Plates
The paper considers the uniaxial buckling of rectangular, anisotropic composite laminates with in-plane restrained unloaded edges where Poisson's effect is predominant to...

Analysis of Delamination Onset and Growth in Curved Laminates
This paper details an analysis to characterize delamination onset and growth from a matrix crack in a curved composite laminate. Finite element analysis was used to determine values of...

Analysis of a CMC Compact Tension Specimen
A cohesive force model is applied to study the stability of fiber failure in a ceramic matrix composite compact tension specimen. By controlling the length of the bridged crack results...

Interlaminar Fracture Toughness Test: Traditional and Modified
For brittle, transversely isotropic, composite materials we have developed an alternative Mode II interlaminar fracture toughness test (G_IIc) that...

Postbuckling Analysis of Composite Stiffeners under Uniaxial Compression
This paper presents an analytical and experimental study conducted for postbuckling of I-section stiffeners. A stability analysis was carried out to determine postbuckling response of...

Characterizing Mode I Fatigue Delamination of Composite Materials
Evaluation of two techniques to characterize fatigue delamination using the double cantilever beam (DCB) specimen are presented. The two techniques were the delamination growth onset (G-N)...

Design Considerations for Large-Scale Filament-Wound Composite Structures
An experimental investigation was conducted to quantify scaling effects in filament-wound composite structures. These preliminary results support the notion that an increase in thickness...

Optimum Design of Laminated Metal Matrix Composites
With the increased demand for high-strength, lightweight materials that function successfully in high temperature environments, the effective development of metal matrix composites has...

Frictionless Contact of Composite Laminates
An approximate solution technique for determination of contact stress distribution under a curved, rigid punch indenting an arbitrary laminated composite plate is outlined. The individual...

Elastic Stability of a Laminated Column
Buckling load of an unsymmetric, laminated column is obtained through the use of imperfection method. The condition requiring to have non-vanishing bending moment at the ends of a pinned-pinned...

A Damping Model for the Vibration of Nonlinear Laminated Composite Cylindrical Panels with High Order Transverse Shears
The damping characteristics of nonlinear vibration of a cylindrical panel including large displacements/rotations and parabolic transverse shears has been discussed in this study. The...

On the Adhesive Strength of Viscoelastic Fibrous Composites
A methodology for solving problems of anisotropic materials using the theory of elasticity (viscoelasticity) is presented. Some results on specific problems related to the stressed-and-deformed...

Statistical Strength Analysis of Composites
A new modified six parameter Weibull distribution model has been adopted to analyze strength data structure of ARALL laminated and graphite-epoxy composites. This model shows better correlations...

Finite Element Analysis and Testing of a Laminated Composite Fuselage Test Structure
A test structure modeling a full scale section of a composite aircraft fuselage was designed, analyzed, fabricated, and pressure tested. The test structure consisted of a cylindrical graphite...

Flexural and Extensional Motion of Moderately Thick Laminated Composite Plates
A general theory of flexural and extensional motion of moderately thick laminated composite plates is developed for linear elastic materials and small deformation. Interlaminar stresses...

An Analytical Solution to Free Vibration Problems of Cross-ply Laminated Thin Doubly-curved Shells
Hitherto an unavailable analytical solution to the free vibration boundary value problems (b.v.ps.) of symmetric and antisymmetric cross-ply laminated thin doubly-curved shells of rectangular...

Damage Tolerance of Composites
The damage tolerance issue in composites is driven by the requirement for and implementation of a structural integrity criterion for a structural system. A key element in the design philosophy...

Failure Modes and Toughening Mechanisms in CMC
The paper reports results from stable flexural and tension tests conducted at room temperature on plain matrix and ceramic matrix composite (CMC) specimens. The flexural tests were conducted...

 

 

 

 

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