
显示样式: 排序: IF: - GO 导出
-
Influence of gradient structure on wear characteristics of centrifugally cast functionally graded magnesium matrix composites for automotive applications Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-12 Bassiouny Saleh, Jinghua Jiang, Reham Fathi, Qiong Xu, Yuhua Li, Aibin Ma
-
Effect of cooling rate on microstructure and microhardness of hypereutectic Al–Ni alloy Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-12 A. P. Carrara, R. Kakitani, A. Garcia, N. Cheung
High solidification cooling rates during unsteady-state conditions of solidification of Al-based alloys can induce different microstructural length scales or metastable phases, leading to improved properties. The present study aims to characterize the microstructural arrangement of the hypereutectic Al–8 wt%Ni alloy, unidirectionally solidified in unsteady-state heat flow conditions, examining the
-
Experimental investigation on the influence of phase change materials on properties and pore structure of steam-cured mortar Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-12 Liping Bi, Guangcheng Long, Cong Ma, Youjun Xie
Steam-cured concrete with high early strength has been widely applied in high-speed railway. However, heat damage caused by the steam curing process brings adverse effects on the pore structure and durability of steam-cured concrete. It has been found that phase change materials (PCMs) help improve the durability of cement-based materials. Therefore, the influences of two PCMs on the strength, water
-
Modified friction stir clinching-brazing of brass to AA5083 aluminum alloy using Zn interlayer Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-12 Jing Li, Fei Tang, Moslem Paidar
The modified friction stir clinching (MFSC) of 5083 aluminum alloy to brass using pure Zn interlayer has been explored and elucidated for the first time. By that, the influence of the Zn interlayer thickness on the microstructure and the mechanical properties of the 5083/brass joint was investigated. The attained data have revealed that the intermetallic compound (IMC) layer thickness was mainly influenced
-
Influence of heat treatment on the mechanical and tribological properties of Incoloy 800H Superalloy Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-08 A. Palanisamy, N. Jeyaprakash, V. Sivabharathi, S. Sivasankaran
The selection and use of high strength alloys with high wear resistance (at room and high temperature) are mandatory in aerospace, nuclear, automotive, petroleum, space, furnace, and chemical industries in which Incoloy 800H superalloy is the right choice. However, this alloy is under the class of ‘difficult to cut material’ caused by their significant properties. In the present work, the heat treatment
-
Long-term behavior of normal weight concrete containing hybrid nanoparticles subjected to gamma radiation Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-07 Sherif H. Al-Tersawy, Rasha A. El-Sadany, H. E. M. Sallam
Since a lot of medical facilities are made from normal weight concrete (NWC), it became an important task to improve the radiation shielding properties of such concrete in a confrontation to radiation with special emphasis on gamma radiation type. Therefore, an experimental program was conducted to investigate the effect of nanoparticles addition on gamma radiation shielding, physical properties, and
-
New approach towards the machining process after laser cladding Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-04 Xuehui Shen, Hao Su, Jiatian Wang, Changsheng Zhang, Chonghai Xu, Xiaolan Bai
-
Processing routes, resulting microstructures, and strain rate dependent deformation behaviour of advanced high strength steels for automotive applications Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-03 Tarun Nanda, Vishal Singh, Gurpreet Singh, Manpreet Singh, B. Ravi Kumar
Automobile industry is continuously striving to obtain light body-in-white structures to meet tightened regulations on flue-gas emissions/crash-testing parameters. ‘Advanced high strength steels (AHSS)’ find increased applications in the automotive industry because of improved crashworthiness/formability at reasonably low costs. AHSS category mainly includes transformation induced plasticity (TRIP)
-
On the nonlinear dynamics of the multi-scale hybrid nanocomposite-reinforced annular plate under hygro-thermal environment Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-02 M. S. H. Al-Furjan, Reza Dehini, Masoud Paknahad, Mostafa Habibi, Hamed Safarpour
In this article, the nonlinear free and forced vibration analysis of multi-scale hybrid nano-composites (multi-scale HNC) annular plate (multi-scale HNCAP) under hygro-thermal environment and subjected to mechanical loading is presented. The material of matrix composite is enhanced by either carbon fibers (CF) or carbon nanotubes (CNTs) at the small or macro-scale. The multi-scale laminated annular
-
Free vibration and buckling analyses of FG porous sandwich curved microbeams in thermal environment under magnetic field based on modified couple stress theory Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-02 Ehsan Arshid, Hossein Arshid, Saeed Amir, S. Behnam Mousavi
Porous sandwich structures include different numbers of layers and are capable of demonstrating higher values of strength to weight ratio in comparison with traditional sandwich structures. Free vibration and mechanical buckling responses of a three-layered curved microbeam was investigated under the Lorentz magnetic load in the current study. A viscoelastic substrate was considered and the effect
-
A new civil engineering material: normal temperature modified phosphogypsum embedded filler Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2021-01-02 Chao-qiang Wang, Dong-sheng Liu, Qian Huang
Phosphogypsum (PG) is a by-product from the industry of phosphate fertilizer industry. Approximately 5 tonnes of PG are generated for per ton of phosphoric acid production. The accumulation of PG occupies huge amounts of land resources and results in serious environmental risks. In this study, a new civil engineering building material product, normal temperature-modified PG-embedded filler, was successfully
-
The structural design of the decay volume for the Search for Hidden Particles (SHIP) project Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-12-20 Andrea Miano, Antimo Fiorillo, Antonio Salzano, Andrea Prota, Richard Jacobsson
The Search for Hidden Particles (SHiP) experiment is a new general-purpose fixed target facility proposed at the CERN Super Proton Synchrotron (SPS) accelerator to search for long-lived exotic particles associated with Hidden Sectors and Dark Matter. This paper reports on the structural design of SHiP’s decay volume, a > 2000 m3 conical vessel under vacuum that should host several large particle physics
-
Effects of modifying the hypoeutectic AlMg5Si2Mn alloy via addition of Al10Sr and/or Al5TiB Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-29 P. Snopiński, M. Król, T. Wróbel, K. Matus, A. Woźniak, T. Tański, P. Palček
This work demonstrates that the combined addition of Al10Sr and Al5TiB master alloys to the AlMg5Si2Mn effectively refines the grain microstructure and partially modifies the eutectic Mg2Si phase. Thorough spectroscopic characterization reveals that the grain refinement effect is due to Al3Ti particles acting as nucleation sites for α-Al grains, and the increased nucleation temperature of α-Al is due
-
Atomic layer deposited ZnO films on stainless steel for biomedical applications Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-28 Marcin Basiaga, Witold Walke, Wojciech Kajzer, Agata Sambok-Kiełbowicz, Janusz Szewczenko, Wojciech Simka, Marek Szindler, Bogusław Ziębowicz, Vira Lubenets
The main goal of carried out tests were the impact of physicochemical properties of surface layers on the course of processes taking place on the surface of implants made of metallic biomaterials used in the bone system. As a precursor of ZnO, diethylzinc (DEZ) has been used, which reacted with water enabling the deposition of thin films. The chamber temperature was as follows—T = 200°–300 °C. The
-
Analytical modeling of surface generation in ultrasonic ball burnishing including effects of indentation pile-up/sink-in and chipping fracture Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-19 Reza Teimouri, Zhanqiang Liu, Bing Wang
In mechanical based machining processes, the surface topography is generated through series of hierarchical pattern. Plastic deformation as result of contact and kinematic of motion are two main factors which determine evolution of surface generation. To basically optimize the surface quality, accurate predictive model of surface generation and constraints are required. In the present work, analytical
-
Microstructure evolution and property analysis of commercial pure Al alloy processed by radial-shear rolling Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-16 Yu. V. Gamin, T. K. Akopyan, A. N. Koshmin, A. P. Dolbachev, A. V. Goncharuk
The features of microstructure formation and properties of commercial pure aluminum alloy (Al 99.5%) obtained by radial-shear rolling (RSR) method at the different heating temperatures of 25, 200, 250, 300 and 350 °C were examined. In this paper, the rods with diameter of 14 mm were obtained from initial billet with diameter of 60 mm in five passes. The microstructure analysis with electron backscatter
-
Prestress state evolution during thermal activation of memory effect in concrete beams strengthened with external SMA wires Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-11 A. Debska, Piotr Gwozdziewicz, A. Seruga, X. Balandraud, J. F. Destrebecq
The memory effect of shape-memory alloys (SMAs) has opened interesting perspectives to create prestress states in concrete elements. However, the procedure has not been yet fully resolved due to the complex thermomechanical behavior of these alloys, in addition to the practical difficulties of mechanical coupling between SMA and concrete elements. The present study deals with tests on the development
-
Exhaust system piping made by hydroforming: relations between stresses, microstructure, mechanical properties and surface Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-06 Barbara Kucharska, Oskar Moraczyński
The subject of research is car exhaust system piping made of chromium–nickel steel of grade AISI304L with a unique, complex shape that was obtained by hydroforming technology. The purpose of the research was to determine the relation between the microstructure features, surface condition, hardness and the stresses on the external surface as determined by the sin2ψ X-ray method. We found that the stresses
-
Creep, shrinkage and permeation characteristics of geopolymer aggregate concrete: long-term performance Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-05 Charitha Seneviratne, Chamila Gunasekara, David W. Law, Sujeeva Setunge, Dilan Robert
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. Microstructure and pore-structure development up to 1 year were examined through scanning electron microscopy, nanoindentation, and X-ray computed tomography
-
Visualization and quantification of aggregate and fiber in self-compacting concrete using computed tomography for wedge splitting test Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-04 B. Raja Rajeshwari, M. V. N. Sivakumar, P. Harsha Praneeth
Wedge splitting test gained popularity as a stable and simple method to predict the fracture mechanism properties of concrete specimens. The present research focuses on understanding the behavior of self-compacting concrete specimens made with and without steel fibers tested using wedge splitting test, later scanned under high resolution computed tomography. The contribution of hooked end steel fiber
-
Fatigue failure analysis of three-layer Zr–Ti/Zr–Steel composite plates: an insight into the evolution of cracks initiated at the interfaces Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-04 Aleksander Karolczuk, Andrea Carpinteri, Grzegorz Robak, Szymon Derda, Mariusz Prażmowski
Initiation and evolution of fatigue cracks at the interfaces in three-layer Zr–Ti/Zr–Steel composites is herein examined by in situ optical microscopy for the first time. Specimens cut out from three composite plates comprising Zr 700, Ti Gr. 1, and P265GH steel layers have been subjected to uniaxial fatigue cyclic loading. It is found that mechanical property mismatch between layers and defects at
-
Physical simulation and dilatometric study of double-step heat treatment of medium-Mn steel Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-01 A. Skowronek, M. Morawiec, V. Ruiz-Jimenez, C. Garcia-Mateo, A. Grajcar
The work addresses physical simulation and dilatometric study of one-step and double-step heat treatments of medium-Mn steel designed for automotive sheets. The conventional one-step isothermal bainitic transformation was applied as the reference heat treatment. The newly implemented heat treatment consisted of isothermal holding in a bainitic region followed by additional holding of the material at
-
Fabrication and effect of Mg–Zn solid solution via Zn foil interlayer alloying in FSW process of magnesium alloy Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-11-01 Prakash Kumar Sahu, Sukhomay Pal, Bipul Das, Qingyu Shi
The present study demonstrates the friction stir welding (FSW) process can be used as a mechanical alloying tool to fabricate a solid solution. An attempt has been taken for alloying the AM20 Mg base matrix using Zn at the weld zone during friction stir welding. Successful joints with sound mechanical properties and enhanced quality attributes are observed in the welds. Use of Zn alloying element at
-
Damage evolution in AA2124/SiC metal matrix composites under tension with consecutive unloadings Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-27 A. Rutecka, M. Kursa, K. Pietrzak, K. Kowalczyk-Gajewska, K. Makowska, M. Wyszkowski
Nonlinear properties of metal matrix composites (MMCs) are studied. The research combines results of loading–unloading tensile tests, microstructural observations and numerical predictions by means of micromechanical mean-field models. AA2124/SiC metal matrix composites with SiC particles, produced by the Aerospace Metal Composites Ltd. (AMC) are investigated. The aluminum matrix is reinforced with
-
A machine learning approach to predict explosive spalling of heated concrete Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-24 Jin-Cheng Liu, Zhigang Zhang
Explosive spalling is an unfavorable phenomenon observed in concrete when exposed to heating load. It is a great potential threat to safety of concrete structures subjected to accidental thermal loads. Therefore, assessing explosive spalling risk of concrete is important for fire safety design of concrete structures. This paper proposed a popular machine learning approach, i.e., artificial neural network
-
Flexible strain sensor with good durability and anti-corrosion property based on metal/polymer composite films embedded with silver nanowires Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-21 Jinjin Luan, Qing Wang, Xu Zheng, Yao Li
-
Vanadium removal from spent sulfuric acid plant catalyst using citric acid and Acidithiobacillus thiooxidans Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-19 Bartosz Mikoda, Anna Potysz, Harry Kucha, Ewa Kmiecik
Spent catalysts being considered hazardous wastes exhibit a high metal content in mobile forms. In addition, growing demand for circular economy policy applications requires proper utilization of these wastes. This study aimed at the assessment of vanadium leaching from spent desulfurization catalyst derived from sulfuric acid plant dump located nearby a copper smelter. Chemical and phase composition
-
Dissimilar friction stir welding of AISI 430 ferritic and AISI 304L austenitic stainless steels Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-18 S. Emami, S. Sadeghi-Kanani, T. Saeid, F. Khan
Dissimilar joints of AISI 430 ferritic and AISI 304L austenitic stainless steels were produced by friction stir welding process. A sound and defect-free joint was obtained at 1 mm tool offset towards the ferritic sample located in the advancing side, and at rotational and welding speeds of 560 rpm and 50 mm/min, respectively. The XRD measurements revealed the presence of approximately equal volume
-
The analysis of EDM electrodes wear in corners and edges Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-17 K. Mouralova, J. Bednar, L. Benes, P. Hrabec, M. Kalivoda, J. Fries
Die-sinking electrical discharge machining is an unconventional technology that allows to machine all at least minimally electrically conductive materials regardless of their physical and mechanical properties. Despite the fact that it is not a conventional technology, the tool gets also worn out, which is a tool electrode. The wear of the electrode does not only mean its loss but also the degradation
-
The fatigue crack behavior of 7N01-T6 aluminum alloy in different particle environments Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-17 Y. Q. Chen, Z. H. Tang, S. P. Pan, W. H. Liu, Y. F. Song, B. W. Zhu, Y. Liu, Z. L. Wen
An experimental method of evaluating the fatigue behavior of alloys in different particle environments was designed, and the effects of four kinds of particles (i.e., graphite, CaO, Al2O3, and MnO2) on the crack propagating behavior of 7N01-T6 behaviour alloys were investigated. The results show that the particles deposited on the crack surface exert significant influence on the fatigue crack propagation
-
Mechanical performance of overlap connections with grout-filled anchor reinforcements in embedded metal corrugated pipe Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-15 Jun Chen, Xulin Chen, Fa-xing Ding, Ping Xiang, Cai-qian Yang, Yilong Liu, Fu Xu
To study the mechanical performances of a new kind of overlapping connection with grouted anchor reinforcements in embedded metal corrugated pipes, a total of 24 groups of 72 specimens were prepared and tested. The overlap connection performance of grouting anchor reinforcements in embedded metal corrugated pipes was studied by bi-directional tension test. The factors such as the diameter of anchor
-
Characterization of the microstructure, microsegregation, and phase composition of ex-situ Fe–Ni–Cr–Al–Mo–TiC p composites fabricated by three-dimensional plasma metal deposition on 10CrMo9–10 steel Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-10 Łukasz Rakoczy, Kevin Hoefer, Małgorzata Grudzień-Rakoczy, Bogdan Rutkowski, Marcin Goły, Torsten Auerbach, Rafał Cygan, Kevin Gordon Abstoss, Anna Zielińska-Lipiec, Peter Mayr
Quaternary powder mixtures yNi–20Cr–1.5Al–xTiCp (y = 78.5, 73.5, 68.5; x = 0, 5, 10) were deposited on ferritic 10CrMo9–10 steel to form on plates ex-situ composite coatings with austenitic-based matrix. Plasma deposition was carried out with various parameters to obtain eight variants. The microstructure, chemical composition, phase constitution, phase transformation temperatures, and microhardness
-
Seismic behaviour of cross-shaped steel fibre reinforced concrete columns Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-10 Linzhu Sun, Zhengzhen Wei, Wei Li, Jinhuai Xiang
This paper proposes a novel cross-shaped column in which steel fibre reinforced concrete (SFRC) is integrated with a high-strength stirrup to enhance its seismic behaviour. An experimental investigation was conducted on eight cross-shaped column specimens subjected to cyclic lateral loading. All of the specimens were evaluated in terms of their cracking patterns, failure modes, hysteresis behaviour
-
Intrinsic cellulosic fiber architecture and their effect on the mechanical properties of hybrid composites Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-08 B. NagarajaGanesh, B. Rekha
-
Deformation-induced martensite in austenitic stainless steels: A review Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-08 Mohammad Javad Sohrabi, Meysam Naghizadeh, Hamed Mirzadeh
Recent progress in the understanding of the deformation-induced martensitic transformation, the transformation-induced plasticity (TRIP) effect, and the reversion annealing in the metastable austenitic stainless steels are reviewed in the present work. For this purpose, the introduced methods for the measurement of martensite content are summarized. Moreover, the austenite stability as the key factor
-
Effects of metal–ceramic anticorrosion coating on the performance of ballastless tracks at high temperature Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-06 Jiwen Zhang, Hailou Jiang, Feng Ding, Pingze Zhang, Fei Zhou, Tao Li, Ning Duan
A highly reflective metal–ceramic anticorrosion coating is proposed to address temperature-induced track arching and concomitant damage of the China Railway Track System II ballastless tracks. The term ceramic refers to the inorganic phosphate coating binder and the metal pertains to the aluminite powder filler. Its thermal properties were studied through finite element modeling and heat radiation
-
Superplastic deformation of Mg–9Li–2Al–0.5Sc alloy after grain refinement by KoBo extrusion and cyclic forging Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-06 Jan Dutkiewicz, Damian Kalita, Wojciech Maziarz, Marek Faryna
The quaternary Mg–9Li–2Al–0.5Sc alloy (in wt%) was prepared from pure components. After homogenization, the alloy was subjected to severe plastic deformation by KoBo extrusion and cyclic forging leading to grain refinement in the range of 0.5–2 µm of hexagonal close-packed (HCP) α phase. Deformed alloys showed high ultimate tensile strength near 200 MPa and good elongation in the range 30–40% at room
-
The application of a new, innovative, hybrid technology combining hardfacing and nitriding to increase the durability of forging tools Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-06 Marcin Kaszuba
The article deals with the wear of forging tools used in hot forging processes. The research presented in the work includes analysis of tool life used in a selected industrial hot die forging process. Multiple treatment variants were used to increase wear resistance, including thermo-chemical treatment (nitriding), welding methods (surfacing) and an innovative new hybrid technology combining surfacing
-
Influence of chemically treated carbon fibers on the electromagnetic shielding of ultra-high-performance fiber-reinforced concrete Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-06 Doo-Yeol Yoo, Min-Chang Kang, Hong-Joon Choi, Wonsik Shin, Soonho Kim
-
Impact resistance of RC beams under different combinations of mass and velocity: mesoscale numerical analysis Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-04 Liu Jin, Yuchang Lan, Renbo Zhang, Xiuli Du
The concrete structures under impact loading duress may be destroyed within an extremely short period of time. The importance and complexity of exploration on the impact resistance of concrete members make this area still open for discussion. In the present study, a 3-D mesoscale numerical model was established to investigate the effect of the combination of impact mass and velocity on the mechanical
-
Microstructural evolution and mechanical properties of multi-directionally forged Si P /ZA22 composite Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-04 D. Yousefi, R. Taghiabadi, M. H. Shaeri, I. Ansarian
The effect of multi-pass multi-directional forging (MDF) on the microstructure and mechanical properties of Zn–22Al–xSi (X = 4 and 8 wt. %) alloy, also known as SiP/ZA22 composite, was investigated. MDF process was applied at 100 °C for one, three, and five passes with the strain of 0.47 per pass. According to the results, MDF refined and homogenized the composites microstructure so that the average
-
A fully coupled thermo-mechanical numerical modelling of the refill friction stir spot welding process in Alclad 7075-T6 aluminium alloy sheets Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-03 Andrzej Kubit, Tomasz Trzepiecinski
Refill friction stir spot welding (RFSSW) is a solid state joining technology that has the potential to replace processes such as the open-air fusion bonding technique and rivet technology in aerospace applications. Selection of proper RFSSW parameters is a crucial task which is important to ensure the mechanical strength of the joint. The aim of this paper is to undertake numerical modelling of the
-
Numerical simulation of plastic deformation in direct-drive friction welding of AISI 4140 and ASTM A106 steel tubes Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-02 J. Hashemi Khosrowshahi, M. H. Sadeghi, A. Rasti
-
Experimental investigation of full-scale concrete columns confined by high-strength transverse reinforcement subjected to lateral cyclic loading Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-01 Chongchi Hou, Wenzhong Zheng, Sheng Li, Xiaohao Wu
The use of high-strength longitudinal and transverse reinforcements in confined concrete columns can improve bearing capacity and deformability. Besides, experiments on confined concrete columns with side length of 400 mm can better reflect the behaviour of confined concrete columns in engineering project. Thus, the purpose of this study is to investigate the seismic behaviour of full-scale confined
-
Methodology for the in situ testing of the moisture content of brick walls: an example of application Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-10-01 Anna Hoła
The article presents original methodology of testing the moisture content of brick walls in buildings. It was developed on the basis of own experience acquired during testing the moisture content in many excessively wet buildings erected in various historical periods. The tests were conducted using different methods, including non-destructive methods. To emphasize the importance of the problem, an
-
Fatigue tests on notched specimens of G20Mn5QT cast steel and life prediction by a new strain-based method Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-23 Qinghua Han, Yaru Wang, Yue Yin, Song Zhang
Fatigue performance of notched specimens of G20Mn5QT cast steel was investigated experimentally and analytically. Fatigue tests on a total number of 22 semi-circular notched specimens were conducted with the load ratios of − 1 and 0.1. Nominal stress-fatigue life relationship was obtained, and mean stress correction rules were verified for the notched specimens based on the test results. A new strain-based
-
Bending and buckling analysis of FGM plates resting on elastic foundations in hygrothermal environment Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-21 A. M. Zenkour, A. F. Radwan
The present paper deals with the effect of exponential temperature and moisture concentration on the bending and buckling analysis of functionally graded plates resting on two-parameter elastic foundations via a four-variable exponential shear deformation theory. The mechanical properties of the plates are assumed to vary through the thickness. The equations of equilibrium are derived using Hamilton’s
-
Natural frequency and bending analysis of heterogeneous polar orthotropic-faced sandwich panels in the existence of in-plane pre-stress Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-17 M. M. Alipour, M. Shaban
In this paper, the effects of plane pre-stresses on the free vibration and static analyses of circular and annular sandwich panels are examined based on an accurate formulation, as first time. It is assumed that initially pre-stresses consist of in-plane normal (tensile/compressive) and pure bending stresses. New first-order shear deformation theory together with a layerwise approach for sandwich panel
-
Rheological and deformation behavior of natural smart suspensions exhibiting shear thickening properties Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-15 Selim Gürgen; Ricardo J. Alves de Sousa
Shear thickening fluid (STF) is a very interesting and promising material in several application fields where a different mechanical is demanded based on loading rates, like body armor and vibration insulators. Cork is a natural cellular material by excellence, filled with well-known beneficial effects in terms of insulation and also interesting crashworthiness properties. In this work, cork grains
-
Application of classification neural networks for identification of damage stages of degraded low alloy steel based on acoustic emission data analysis Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-14 Joanna Krajewska-Śpiewak; Igor Lasota; Barbara Kozub
The paper presents the influence of low alloy steel degradation on the acoustic emission (AE) generated during static tension of notched specimen. The material was cut from a technological pipeline long-term operated in the oil refinery industry. Comparative analysis of AE activity generated by damage process of degraded and new material has been carried out. The different AE parameters were used to
-
Hydrostatic cyclic extrusion compression (HCEC) process; a new CEC counterpart for processing long ultrafine-grained metals Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-13 Armin Siahsarani; Ghader Faraji
Hydrostatic cyclic extrusion–compression as a novel severe plastic deformation method in the processing of the rods is introduced and used for refining ultrafine-grained commercial pure aluminum. HCEC is solving the limitation of the conventional CEC in producing long-length samples by utilizing pressurized hydraulic fluid and eliminating the frictional effects. An increase in the length of the processable
-
Numerical simulation of manufacturing process chain for pearlitic and bainitic steel rails Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-11 Andrij Milenin; Władysław Zalecki; Monika Pernach; Łukasz Rauch; Roman Kuziak; Tomasz Zygmunt; Maciej Pietrzyk
Computer system for the design of technology of the manufacturing of pearlitic and bainitic rails was presented in this paper. The system consists of the FEM simulation module of thermal–mechanical phenomena and microstructure evolution during hot rolling integrated with the module of phase transformation occurring during cooling. Model parameters were identified based on dilatometric tests. Physical
-
Seismic behavior of frost-damaged squat RC shear walls under artificial climate environment: a further experimental research Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-10 Xian-Liang Rong; Shan-Suo Zheng; Yi-Xin Zhang; Li-Guo Dong; Huan Liu; Kuang-Yu Dai
In cold environment, the damage of freezing and thawing poses a great threat to the safety of concrete structures. In this study, 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 walls. The seismic
-
Flexural behavior of composite structural insulated panels with magnesium oxide board facings Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-09 Łukasz Smakosz; Ireneusz Kreja; Zbigniew Pozorski
The current report is devoted to the flexural analysis of a composite structural insulated panel (CSIP) with magnesium oxide board facings and expanded polystyrene (EPS) core, that was recently introduced to the building industry. An advanced nonlinear FE model was created in the ABAQUS environment, able to simulate the CSIP’s flexural behavior in great detail. An original custom code procedure was
-
Experimental and numerical analyses of 45 steel during three dimensional severe plastic deformation (3D-SPD) Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-08 Yuhua Pang; Pengcheng Lin; Qi Sun; Zhe Zhang; Dong Liu
Due to the limitation of huge forming load, inhomogeneity of plastic deformation, and small volume of deformation region, it is difficult to prepare bulk ultra-fine grains material (UFGM) with industry size by the existing severe plastic deformation (SPD) methods. In this study, a novel SPD method, namely 3D-SPD, was proposed. By establishing finite element model, the distribution of material flow
-
Modelling and parameter identification of steel–concrete composite beams in 3D rigid finite element method Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-03 Małgorzata Abramowicz; Stefan Berczyński; Tomasz Wróblewski
This study presents spatial vibration modelling of steel–concrete composite beams. Structures of this type are commonly used as elements of composite floors and primary carrying girders in bridge structures. Two-dimensional models used to date did not enable analysis of all eigenmodes, specifically torsional, flexural horizontal, and distortional. A discrete computational model was developed in the
-
Finite beam element with 22 DOF for curved composite box girders considering torsion, distortion, and biaxial slip Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-02 Li Zhu; Jia-Ji Wang; Ming-Jie Li; Chao Chen; Guang-Ming Wang
Experimental and numerical study on the mechanical performance of curved steel–concrete composite box girders is reported in this research. First, this research establishes a theoretical model for curved composite girders with 11° of freedoms (DOFs) for each node. The DOFs include the longitudinal displacement, transverse displacement, deflection, torsion angle, warping angle, and interface biaxial
-
Estimation of residual stress in air plasma sprayed MWCNT-reinforced 8YSZ–alumina composite coating Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-02 J. G. Thakare; R. S. Mulik; M. M. Mahapatra
Thermal barrier coating (TBC) with Al2O3 and 8YSZ as topcoat constituents has been developed. The commercially available 8YSZ (80% wt.), Al2O3 (17 and 19% wt.) and multiwall carbon nanotubes (MWCNT) (3% and 1% wt.) were plasma sprayed to produce composite coatings. A stress relaxation technique using a slow-speed diamond cutter has been used to relax the strain and determine the through-thickness residual
-
Mechanical properties enhancement of cast Al-8.5Fe-1.3V-1.7Si (FVS0812) alloy by friction stir processing Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-09-02 Z. Nouri; R. Taghiabadi; M. Moazami-Goudarzi
This study was conducted to investigate the capability of multi-pass friction stir processing (FSP) on microstructure modification and mechanical properties improvement of FVS0812 alloy. FSP was performed at different rotation speeds (1250, 1600, 2000, and 2500 rpm) and traverse speeds (8, 12, and 25 mm/min) for one, two, and four passes. According to the results, applying single-pass FSP at optimized
-
Role of dissimilar IN617 nickel alloy consumable on microstructural and mechanical behavior of P91 welds joint Arch. Civ. Mech. Eng. (IF 3.672) Pub Date : 2020-08-17 Sanjeev Kumar; Chandan Pandey; Amit Goyal
This paper investigates the metallurgical behavior and mechanical properties of the P91 steel welds joint. The joint of heat-resistant P91 steel has been welded by the gas tungsten arc welding (GTAW) process using the dissimilar Inconel grade 617 filler. The P91 welds joints have been subjected to varying heat treatment regimes in the temperature range of 650–810 °C for 2 h. The normalizing-based tempering