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)...
Characterization of Acoustic Emission Signals
Separation of crack growth signals is of fundamental importance for detecting, locating and determining the significance of an internal flaw using acoustic emission techniques. An analytical...
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...
Partial Hybrid Stress Element for Higher-Order Laminated Plates Theory
The partial hybrid stress method is applied to higher-order plate theory for orthotropic laminated plates. This new element performs better than displacement formulation and approaches...
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...
Coupled Bending and Twisting of Thin-Walled Composite Beams
Thin-walled open-section composite material beams of the T, I and J geometries are routinely used as stiffeners for structural components in aerospace vehicles (Starnes et al, 1985). In...
Failure Characterization of Structural FRP Bars
A combined experimental and theoretical investigation on the structural behavior of fiber reinforced plastic (FRP) bars is presented. Test results indicate that the ultimate strength decreases...
On the Design of Laminated Composite Flange: A Model with Experimental Verification
A parametric model has been developed for the optimum design of laminated composite flange. The study focuses on the evaluation and performance optimization of composite flanges with the...
Use of Laser Holography and Image Analysis for Crack Measurement and Determination of Strain Fields in Cement Based Materials
The authors have successfully used laser holographic interferometry to measure various parameters, such as crack size, crack spacing, crack opening displacement, surface displacements...
Observations of Microcracking and Pore Collapse in Limestone Using Liquid Metal Porosimetry
A technique has been developed to preserve and observe the microstructure of rock or other porous material, as they exist under stresses, using liquid metal porosimetry. Cylindrical specimens...
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