Showing papers in "Materials & Design in 2010"

TL;DR: In this paper, five important process parameters such as layer thickness, orientation, raster angle, Raster width and air gap are considered and their influence on three responses such as tensile, flexural and impact strength of test specimen is studied.

TL;DR: The use of SMA-actuated structures in shape morphing wing designs reduces the weight penalty due to the actuation systems, because such SMAactuated structure carries aerodynamic loads as mentioned in this paper.

TL;DR: Shaped metal deposition (SMD) is a relatively new technology of additive manufacturing, which creates near-net shaped components by additive manufacture utilizing tungsten inert gas welding as mentioned in this paper, which has great advantages.

TL;DR: In this article, the material properties of carbon nanotube-reinforced composites (FG-CNTRCs) are modeled through a micromechanical model based on the multi-scale approach.

TL;DR: In this article, the composites formed using main rapid prototyping processes such as Selective Laser Sintering/Melting, Laser Engineered Net Shaping, Laminated Object Manufacturing, Stereolithography, Fused Deposition Modeling, Three Dimensional Printing and Ultrasonic Consolidation are discussed.

TL;DR: In this article, the size-dependent static and vibration behavior of micro-beams made of functionally graded materials (FGMs) is analyzed on the basis of the modified couple stress theory in the elastic range.

TL;DR: In this article, a hybrid of kenaf/glass fiber was used to enhance the desired mechanical properties for car bumper beams as automotive structural components with modified sheet molding compound (SMC).

TL;DR: In this paper, the effect of MWNT addition and surface modification on the mechanical properties of carbon nanotubes (MWNTs) was investigated by using Modified Halpin-Tasi equation to evaluate Young's modulus and tensile strength of the MWNTs.

TL;DR: A review of the literature in the field of material selection of engineering components can be found in this paper, where a variety of quantitative selection procedures have been developed to solve this issue, so that a systematic evaluation can be made.

TL;DR: In this article, the tensile, flexural and dielectric properties of vakka fiber composite are investigated for electrical insulation applications and it has been observed that tensile properties increase with respect to volume fraction of fiber.

TL;DR: Basalt and glass fibers were treated with sodium hydroxide and hydrochloric acid solutions respectively for different periods of time, and the mass loss ratio and the strength maintenance ratio of the fibers were examined after the treatment as discussed by the authors.

TL;DR: In this article, the elastic moduli of graphene sheets and carbon nanotubes were predicted using a linkage between lattice molecular structure and equivalent discrete frame structure. But the results for a graphene sheet show an isotropic behavior, in contrast to limited molecular dynamic simulations.

TL;DR: In this paper, the influence of steel fiber types and amounts on flexural tensile strength, fracture behaviour and workability of steel bar reinforced high-strength concrete beams was investigated.

TL;DR: The research has concluded that the PSI method is logical and more appropriate for the material selection problems.

TL;DR: In this paper, inertia friction welding has been used to create joints between a 6061-T6 aluminum alloy and a AISI 1018 steel using various parameters, and the joints were evaluated by mechanical testing and metallurgical analysis.

TL;DR: In this paper, a comprehensive review on the general methodologies on the damage constitutive modeling by continuum damage mechanics (CDM), the various failure criteria, the damage evolution law simulating the stiffness degradation, and the finite element implementation of progressive failure analysis in terms of the mechanical response for the variable-stiffness composite laminates arising from the continuous failure.

TL;DR: In this paper, the compressive strength, modulus of elasticity, and water permeability of IPCs depend on the mix proportions, especially the solution to ash (S/A ) ratio and the paste to aggregate (P/Agg ) ratio.

TL;DR: In this paper, a green composite based on natural halloysite nanotubes (HNTs) and natural rubber (NR) was prepared by mechanical mixing and a silane coupling agent, bis (triethoxysilylpropyl)-tetrasulphide, was utilized to enhance the properties of these composites.

TL;DR: In this article, fly ash Cenospheres are used as reinforcing filler in High density polyethylene (HDPE) to develop lightweight composites and the tensile and thermal properties of the composites were measured according to ASTM methods.

TL;DR: In this paper, the optimal injection molding conditions for minimum shrinkage were determined by the Taguchi, experimental design and the analysis of variance (ANOVA) methods, and the neural network (NN) model was generated and was shown to be an efficient predictive tool for shrinkage.

TL;DR: In this paper, the critical stress and strain for initiation of dynamic recrystallization (DRX) were determined using: (1) the strain hardening rate versus stress curve, (2) the natural logarithm of strain versus strain curve, and (3) the constitutive equations.

TL;DR: In this article, the authors proposed a MADM method for material selection for a considered design problem, which considers the objective weights of importance of the attributes as well as the subjective preferences of the decision maker to decide the integrated weights.

TL;DR: In this paper, the effect of laser power, pulse duration and overlapping factor on the tensile strength of a keyhole welding of low carbon steel to 5754 aluminum alloy was investigated.

TL;DR: In this paper, a Finite Element Model (FEM) was developed to evaluate the stresses induced by the thermal cycling in a typical plasma-sprayed thermal barrier coating system (TBCs), which takes into account the effects of thermal and mechanical properties, morphology of the top-coat/bond-coat interface and oxidation on the local stresses that are responsible for the microcrack nucleation during cooling.

TL;DR: In this article, the usability of waste marble dust (WMD) as an additive material in blended cement has been investigated, and it was shown that 10% WMD can be used as additive material for cement manufacturing.

TL;DR: In this paper, the mechanical properties of high strength concrete incorporating copper slag as a fine aggregate were investigated and it was concluded that less than 40% copper slags as sand substitution can achieve a high-strength concrete that comparable or better to the control mix, beyond which its behaviors decreased significantly.

TL;DR: In this article, the tensile deformation behavior and microstructural evolutions of twinning induced plasticity (TWIP) steel with the chemical composition of Fe-31Mn-3Al-3Si and average grain sizes in the range of 21-726μm have been analyzed for each grain size, the Hollomon analysis and also the Crussard-Jaoul analysis as an alternative method to describe the work hardening behavior were investigated.

TL;DR: In this article, the performance of a commercially available AA6061 alloy aged to various levels were studied and the variation of the yield stress, ultimate tensile strength, ductility and strain hardening rate with aging time was measured and discussed in relation to the microstructural changes induced by the heat treatment.

TL;DR: In this paper, a constitutive analysis for hot working of modified 9Cr-1Mo (P91) ferritic steel was carried out employing experimental stress-strain data from isothermal hot compression tests.

TL;DR: In this paper, the influence of graphite (Gr) particulates as a second reinforcement on the tribological behaviour of aluminium matrix composites reinforced with silicon carbide (SiC) is investigated.