Showing papers in "Composite Structures in 2004"

TL;DR: In this article, the possibility of using lignocellulosic materials as reinforcing fillers in the thermoplastic polymer composite, polypropylene as the matrix and rice-husk flour as the reinforcing filler were used to prepare a particle-reinforced composite in order to determine testing data for the physical, mechanical and morphological properties of the composite according to the filler loading.

TL;DR: In this paper, equilibrium and stability equations of a moderately thick rectangular plate made of functionally graded materials under thermal loads are derived based on the first order shear deformation theory, assuming that the material properties vary as a power form of thickness coordinate variable z.

TL;DR: In this article, the influence of drilling and material variables on thrust force, torque and delamination of fiber reinforced thermoset composites was investigated experimentally and the results showed that the presence of sand filler in continuous-winding composites not only raised the values of cutting forces and push-out delamination but also increased their values with increasing cutting speed.

TL;DR: In this paper, structural panels and unit beams were manufactured out of soybean oil based resin and natural fibers (flax, cellulose, pulp, recycled paper, chicken feathers) using vacuum assisted resin transfer molding (VARTM) technology.

TL;DR: In this article, the ballistic impact behavior of two-dimensional woven fabric composites has been investigated and different damage and energy absorbing mechanisms during ballistic impact have been identified, including deformation of primary yarns, delamination, matrix cracking, shear plugging and friction during penetration.

TL;DR: In this paper, the authors investigate the influence of some parameters on the thrust force, torque and surface roughness in drilling processes of fiber-reinforced composite materials, including cutting speed, feed, drill size and fiber volume fraction.

TL;DR: In this paper, an analytical solution is presented to calculate the stresses in the reinforced beam under mechanical as well as thermal loads, and the solution has been extended by a numerical procedure to CFRP plates with tapered ends.

TL;DR: In this article, the results of experimental works pertaining to the crash behaviour, collapse modes and crashworthiness characteristics of carbon fiber reinforced plastic (CFRP) tubes that were subjected to static axial compressive loading are presented in detail.

TL;DR: In this paper, a single laminate configuration, viz. cross-ply [0°/90°] polymer matrix composites (PMC) at strain rates of 10−3 and 450 s−1, was used to determine the compressive material properties.

TL;DR: In this paper, a multiple objective linear program was used to optimize drilling feed and speed not only to maximize each hole quality parameter to the greatest extent possible but also to minimize machining cost.

TL;DR: In this paper, a Lamb wave-based quantitative identification technique for delamination in CF/EP composite structures was established, where the propagation of Lamb waves in a series of composite laminates, individually bearing a delamination, was evaluated using dynamic FEM analyses.

TL;DR: In this paper, an irreversible cohesivedecohesive constitutive law is proposed for interfacial surface discontinuities to predict initiation and progression of delamination and the constitutive equations are made thermomechanically consistent by including a damage parameter to prevent the restoration of the previous cohesive state between the interfacial surfaces.

TL;DR: In this article, the influence of wood flour content, coupling agent and stress loading level on the creep behavior of wood-flour-polypropylene composites was investigated, and it was shown that the tensile strength decreased with increasing wood flour level in the composites.

TL;DR: In this article, foam filled 3D integrated core sandwich composite laminates with and without additional face sheets were fabricated using vacuum assisted resin infusion molding process in multiple steps, and three samples were tested at each energy level.

TL;DR: A review of the current damage mechanics and fracture methods for predicting delamination under impact available in the literature is presented in this paper, which concludes that additional development is required before a definitive predictive delamination method will be available.

TL;DR: In this article, the third-order theory of Reddy for composite laminated beams and plates is discretized using a meshless method based on the multiquadric radial basis function method.

TL;DR: In this article, the response of stitched/unstitched woven fabric carbon/epoxy composite laminates subjected to high velocity impact loading is discussed and the ensuing damage was characterized through ultrasonic NDE.

TL;DR: In this article, a GA with local improvement is applied to a composite propeller and the amount of calculation is reduced by over half by using a regression model to estimate objective function values accurately using only few sample points.

TL;DR: In this paper, an analytical model related to the assessment of equals behavior is proposed, which takes into account the geometrical and mechanical properties of the corrugated cardboard constituents.

TL;DR: In this paper, an efficient zigzag one-dimensional (1D) theory of laminated beams is assessed by comparison of analytical solutions of simply supported beam with exact 2D elasticity solutions for static patch load, natural frequencies, harmonic transverse load with sinusoidal longitudinal variation and buckling under axial load.

TL;DR: In this article, the static thermo-elastic response of symmetric and anti-symmetric cross-ply laminated plates has been investigated by the use of a unified shear deformation plate theory.

TL;DR: In this paper, a testing program including 18 rectangular reinforced concrete beams is carried out to investigate the failure mechanisms and the influence of several parameters on these debond modes, and several debond prediction models are then verified with the experiment proving to work relatively well.

TL;DR: In this article, a semi-analytical method has been presented to evaluate the natural frequencies as well as displacement and stress eigenvectors for simply supported, cross-ply laminated and sandwich plates by using higher order mixed theory.

TL;DR: In this paper, a study with the objective of evaluating the cutting parameters (cutting velocity and feed rate) related to machining force in the workpiece, delamination factor, surface roughness and international dimensional precision in two GFRP composite materials (Viapal VUP 9731 and ATLAC 382-05) was presented.

TL;DR: In this paper, the von Karman strain-displacement relation is used to account for the large deflection of a thermally buckled composite plate embedded with SMA fibers.

TL;DR: In this article, a one-piece automotive hybrid aluminum/composite drive shaft was developed with a new manufacturing method, in which a carbon fiber epoxy composite layer was co-cured on the inner surface of an aluminum tube rather than wrapping on the outer surface to prevent the composite layer from being damaged by external impact and absorption of moisture.

TL;DR: In this article, the impact analysis of composite laminates using the modified Hertzian contact law and the experimental static indentation law was investigated and the difference between the analytical results obtained using the two laws was also investigated.

TL;DR: In this paper, the effect of an initial pre-stress on the response of carbon-fibre/epoxy laminated plates subjected to low velocity impact is investigated, and the results indicate that the penetration/perforation depth, peak load and absorbed energy are essentially independent of the nature and magnitude of the pre-stress at low levels of impact energy (6 J), becoming more significant at higher levels of intensity (10 J).

TL;DR: In this article, numerical analyses are performed using the ABAQUS finite element program to predict the ultimate loading capacity of rectangular reinforced concrete beams strengthened by fiber-reinforced plastics applied at the bottom or on both sides of these beams.

TL;DR: In this paper, an initial study of this research to identify plastic deformation of the matrix material around shape memory alloy (SMA) fibres, and bond quality, based on the microscopic observation and mechanical test results obtained.