Showing papers in "Archives of Civil and Mechanical Engineering in 2020"

TL;DR: In this article, the deformation-induced martensitic transformation, the transformation-induced plasticity (TRIP) effect, and the reversion annealing in the metastable austenitic stainless steels are reviewed.

TL;DR: This paper fills a gap in the literature as it addresses a new aspect of 3D printing, which is risk, and also discusses and categorizes the benefits, challenges, and risks of3D printing in construction.

TL;DR: In this article, a series of uniaxial compression tests were conducted on non-persistently jointed rock specimens with double circular holes and the results indicated that the existence of nonpersistent joints has a significant influence on the strength characteristics of the specimens.

TL;DR: In this paper, an analytical design method for ductile tunnel linings is performed and an analytical prediction for the behavior of ductile tunnelling is provided, based on the principle of equivalent deformation of shotcrete linings with yielding elements.

TL;DR: In this article, a review of the use of laser powder bed fusion (L-PBF) for processing magnesium alloys as an alternative way to conventional technologies to manufacture parts in the aerospace industry is presented.

TL;DR: In this paper, five concrete mixtures with different replacement rates of lightweight ceramsite sand to silica sand are prepared for extrusion-based 3D printability evaluation and three different types of interior hollow structures are designed and 3D printed based on the optimized lightweight mixture.

TL;DR: In this paper, a nonlinear large-amplitude free vibration response of nanoshells prepared from functionally graded porous materials (FGPM) is investigated by taking into account surface stress size effects and vibrational mode interactions.

TL;DR: In this article, a review of the processing routes to obtain the ferritic-martensitic microstructures, parameters of intercritical annealing (IA) treatment, primary thermomechanical treatments, and post processing of dual phase (DP) steels is presented.

TL;DR: In this paper, a new constitutive model of saw-tooth joints was proposed based on Improved Harris function and laboratory shear tests, which can represent the trend of peak shear curve variation with higher accuracy, the parameters are easy to be solved and have obvious physical significance.

TL;DR: In this article, the authors proposed a new class of metal-polymer architected sandwich structures that exhibit different mechanical behaviors, which are made of aluminum face sheets and 3D-printed lattice cores with 2D (Bi-grid, Tri-grid), Quadri-grid and Kagome-grid topologies.

TL;DR: In this paper, the metallurgical behavior and mechanical properties of the P91 steel welds joint have been investigated and the relationship between mechanical behavior and microstructure of the welded joint has been evaluated for as-welded and heat treatment conditions.

TL;DR: In this paper, a possible use of the guided waves in the estimation of the resistance of steel-concrete adhesive connection is studied, and the relationship relating adhesive connection resistance and wave propagation characteristics (wave velocity and the time of flight) have been derived and experimentally verified during pull-out tests conducted on a number of reinforced concrete beams varying in the debonding area.

TL;DR: In this paper, an innovative method for forming rail car axles by skew rolling in a CNC 3-roll mill was proposed. But the major shortcoming of the proposed method is the presence of chucking allowance.

TL;DR: In this paper, the higher-order modeling of a cylindrical nano-shell resting on Pasternak's foundation based on nonlocal elasticity theory is studied, and numerical results including lower-and higherorder longitudinal and radial displacements are presented in terms of nonlocal parameter.

TL;DR: In this article, the effect of SiC particles content on microstructure, mechanical and wear behavior was investigated using the optical microscope, scanning electron microscopy and EDX analyses.

TL;DR: In this article, the authors investigated the performance of concrete beams reinforced with steel-FRP composite bar (SFCB) and showed that SFCB/hybrid reinforced specimens exhibited improved stiffness, reduced crack width and larger bending capacity compared with FRP-reinforced specimen.

TL;DR: In this paper, the evolution of microstructure, texture and mechanical properties of AA 7075 alloy during equal channel angular pressing (ECAP) by route BC at room temperature at a pressing speed of 1 mm/min.

TL;DR: In this paper, the friction spot extrusion welding process is successfully performed on dissimilar aluminum alloys of AA2024-T3 and AA6061-T6 under the influence of shoulder features.

TL;DR: In this article, the results of experiments on deficient exterior reinforced concrete (RC) strong beam-weak column connections strengthened with carbon fiber-reinforced polymer (CFRP) sheets were reported.

TL;DR: A compact compliant mechanism that enables in-principle straight-line parallel jaw motion is obtained, by combining the Scott–Russell mechanism and the parallelogram mechanism, for micro-manipulation applications.

TL;DR: In this paper, the experimental performance of UHPSFRC beams subjected to loads at relatively low shear span-to-depth ratios was examined, and the results and observations from six tests provided a detailed insight into the ultimate response including shear strength and failure mode.

TL;DR: In this article, six frost-damaged squat reinforced concrete (RC) shear walls were subjected to low cyclic reversal loading to investigate the effects of axial compression ratio, concrete strength and freeze-thaw cycles (FTCs) on the seismic performance of squat RC shear wall.

TL;DR: In this paper, the effect of the material microstructure on the machining stability and tool wear behavior in dry drilling of the hard titanium alloys was investigated and the experimental results highlight a correlation between the tool wear behaviour and material microstructures.

TL;DR: This study shows that ANN is a promising method for adequate classification of concrete as material resistant or not resistant to thermal explosive spalling.

TL;DR: In this paper, the transverse groove springs are designed and the isolator prototype is assembled, and the experimental results clearly show the good isolation performance of the QZS isolator and meanwhile reflect some practical factors that should be noticed in actual applications.

TL;DR: In this article, three-dimensional fully coupled thermo-mechanical models of RFSSW joints between Alclad 7075-T6 aluminium alloy sheets have been built in the finite-element-based program Simufact Forming.

TL;DR: In this article, the microstructure analysis with electron backscatter diffraction (EBSD), measurements of microhardness HV over cross-section, and tension test for determination of mechanical properties were carried out for these rods.

TL;DR: In this article, the long-term impact on creep, drying shrinkage, and permeation characteristics of an innovative concrete produced with manufactured geopolymer coarse aggregate (GPA) has been investigated and compared with quarried Basalt aggregate concrete.

TL;DR: In this article, cork grains of very small size (0.5-1.0mm) are added to two different shear thickening suspensions, one of them a fully natural water and cornstarch, and the other based on fumed silica and polyethylene glycol.

TL;DR: In this paper, the influence of corroded steel bars on seismic performance of reinforced concrete (RC) columns was investigated and fabricated, which were composed of one uncorroded RC column, three RC columns with longitudinal reinforcement corrosion and four stirrup-corroded columns.