Showing papers in "Archives of Civil and Mechanical Engineering in 2015"

TL;DR: In this article, an overview of the electrical discharge machining process, modeling of process parameters, and influence on performance measures such as material removal rate, surface roughness and electrode wear rate are discussed.

TL;DR: In this paper, a new multi-criteria decision-making technique to select criteria for building sustainability assessment is presented, where criteria weights are determined by applying Analytic Hierarchic Process (AHP) method.

TL;DR: In this paper, the authors determined the cutting conditions in the process of turning duplex stainless steel (DSS), and detailed identification of wear mechanisms occurring on the rake face and major flank.

TL;DR: In this article, a single pass FSP was carried out using a tool with 1200-rpm rotational speed, whose travel speed of 60mm/min and an axial force of 10kN to produce the composite.

TL;DR: In this article, the impact behavior and damage characterization of carbon fiber reinforced aluminium hybrid laminates (Al/CFRP) in comparison to classic carbon fibre reinforced polymer at low-velocity and low-energy impact were examined and discussed.

TL;DR: In this article, the influence of tool shape and weld configuration on the microstructure and mechanical properties of Al 6082 alloy FSW joints was investigated and it was shown that all tool types produce high quality butt joints free from defects or imperfections.

TL;DR: In this article, the brake pad hybrid phenolic composites based on lapinus and aramid fiber combination are designed, fabricated and characterized for various physical, chemical, mechanical, thermo-mechanical and tribo-performance.

TL;DR: In this article, a study concerning an automatic determination of distribution of steel fibres in self-compacting concrete (SCC) is presented, where the determination of fiber distribution is required to assess any relationship between those features and casting methods of concrete elements.

TL;DR: In this paper, the results obtained from tribological tests of F3S.20S aluminium composite material containing (20% (v/v) SiC and AlSi9Mg alloy) were carried out on raw samples (without thermal treatment) and on samples subjected to T6 thermal treatment.

TL;DR: In this article, a comparative analysis of experimental and theoretical deflections of simply supported beams reinforced with BFRP rebar (Basalt Fiber Reinforced Polymers) is presented, where the results clearly show that basalt rebar having full resistance against corrosion may be good alternative for the reinforcement of concrete structures, like RC bridge girders subjected to environmental attack.

TL;DR: In this paper, the authors focused on the modeling of cutter's displacements during ball end milling with various surface inclinations, and proposed a model including tool's geometry, cutting conditions, surface inclination angle, run out and tool's deflections.

TL;DR: In this article, an analysis of the effects of random imperfections on the load carrying capacity of a hot-rolled steel beam was performed in the analytical form using the Latin Hypercube Sampling method.

TL;DR: In this article, a new combination of two separate welding processes, i.e., friction stir spot welding (FSSW) and ultrasonic welding (USW), is introduced, and the effect of process factors such as US vibration, tool rotary speed, tool plunge depth and dwell time on lap shear force and hardness is developed.

TL;DR: In this paper, a cognitive approach for analyzing and reducing the Pareto optimal set for multi-objective optimization (MOO) of structural problems by means of jointly incorporating subjective and objective aspects is proposed.

TL;DR: Typical challenges of conveyor belt transport maintenance are analyzed and a suitable expert system that predicts values of the analyzed time series, using the predicted values and inference rules to verify any potential false alarm signals at the same time is presented.

TL;DR: In this article, a 3 mm thick aluminium alloy AA5052 and HSLA steel were successfully butt joined using friction stir welding (FSW) technique by varying the tool traverse speed while keeping the other parameters constant.

TL;DR: In this article, fabrication and characterization of Al-Al 2 O 3 composite materials with a 5, 10, 15% and 20% volume fraction of reinforcing phase particles was presented. And the results showed that a composite with 20% alumina content is characterized by a larger hardness (1355 MPa) and compression strength (247 MPa).

TL;DR: In this article, the microstructure of mortars made with an ordinary Portland cement and slag cement has been studied using impedance spectroscopy, and mercury intrusion porosimetry as a contrast technique.

TL;DR: In this paper, the authors deal with the experimental study of impact damage identification of composite structures subjected to the low-velocity impacts by stones using nonseparable quincunx wavelets.

TL;DR: In this article, a combined finite element and analytical method for obtaining transverse and longitudinal vibrations of a gantry crane system subjected to an elastically suspended moving body is presented, and the two-dimensional inertial effects of the moving body are included in derivation of differential equation of motion for the system.

TL;DR: In this paper, the authors presented a theoretical analysis and visual experimental investigation on flow processes in the inlet chamber, outlet bridge and inlet chambers of the gear pump, commonly known as the trapped volume.

TL;DR: In this article, the authors deal with the generalisation of the Kirchhoff-love plates theory using fractional calculus, a branch of mathematical analysis that studies differential operators of an arbitrary (real or complex) order, emerged as a powerful tool for modelling complex systems.

TL;DR: In this article, the authors analyzed the fracture mechanism of brittle rock material with seven different fissure angles and found that the crack coalescence behavior of specimen containing combined flaws under uniaxial compression is closely dependent to fissures angle.

TL;DR: In this article, a three-dimensional finite element model is proposed in which the nanotubes are modeled using the principles of structural mechanics, and a linkage between the molecular mechanics and the density functional theory is constructed.

TL;DR: In this paper, the authors present the numerical and experimental results of producing hollow parts by a new method of rotary compression, which is called axisymmetric hollow part (AHP).

TL;DR: In this article, a combined Eulerian-Lagrangian (CEL) method was adopted to develop a full-coupled 3D finite element model to simulate mechanical behavior of steel pipelines and considering air in the model increased simulation accuracy.

TL;DR: In this paper, the authors present the attempts at determining the reasons for the hazardous incidents which threaten the safety of people working on scaffolds, as well as in their vicinity, and present the range of activities that contribute to the decrease in or even the avoidance of risky situations involving scaffolds.

TL;DR: In this article, a new scheme of damage detection and localisation is presented by implementing frequency response functions (FRFs) of damaged structure only, where damage sensitive shape signals are generated by taking the second order derivatives of the operational mode shapes at each frequency coordinate and then the anti-symmetric extension of each shape signal at the beginning and at the end of the signal is created to avoid boundary distortion.

TL;DR: In this article, the authors presented a method of identification and classification of internal defects of polymeric composite structures after the water-jet cutting based on CT scanning and 3D wavelet analysis.

TL;DR: In this paper, the results of experimental works connected with the possibility of limiting the adhesion of grinding products to the active surface, as a result of introducing an impregnate, in the form of sulphur or allotropic carbon variants, into the grinding wheel volume, were described.