bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of rope zone of multi-point multi-layer winding lifting system in ultra-deep mine
Authors: Wang H L , Gong X S , Deng Y , Cheng X R 
Published: March 2020

Abstract
In the mining of ultra-deep resources, workers need to use ultra-deep mine lifting equipment to lift minerals, in order to ensure the synchronization between ropes during the lifting process. The article analyzes the change in the length difference between the steel ropes from the perspective of rope groove deformation. This work considers the influence of the weight of the vertical rope, analyzes the variation of surface load on the rope groove, establishes the expressions for deformation at the rope groove, and analyzes the influence of rope groove deformation on the difference in the length of the wire ropes. The results show that in the ultra-deep mine multi-layer winding lifting system, the rope groove load varies with the height of the rope. The rope groove deformation curve is similar to the quadratic function curve, and the maximum point is close to the middle position. Based on these results, the article studies the influence of the imbalance between the circles, the winding gap, and the rope-out method on the difference in the length of the wire ropes. It is found that, the extent of the lack of synchronization between the rings has a greater influence on the change in the length of the wire rope, and a wire rope wound under the reel is more conducive to ultra-deep mine lifting.
Influence of resin content on mechanical properties of composite laminates
Authors: Yang K , Yue Y M , Zhao W P , Liang Y , Mei L , Xue J J 
Published: March 2020

Abstract
The resin content has an important effect on the mechanical properties of composite laminates. In order to study the influence of different resin content on the mechanical properties of composite laminates, the mechanical properties of the standard samples of carbon fiber composite laminates with resin content of 30, 35, 40, 45, and 50% have tested, and the fracture regions of the samples have scanned by scanning electron microscope. The test results show that the tensile strength of the carbon fiber composite laminates increases first and then decreases with the change of resin content. When the resin content is 35%, the tensile strength reaches the maximum. Moreover, the elastic modulus decreases with resin content.
Metallurgical modeling of intergranular HAZ liquation cracking during laser welding newly developed crystallography-dependent aerospace materials. Part II: Grain boundary alloying segregation of microstructure modification
Authors: Gao Z G 
Published: March 2020

Abstract
Metallurgical modeling of the nonequilibrium grain boundary segregation was coupled with a nonequilibrium weld pool solidification to numerically analyze the contributing factors to liquation cracking resistance. The effect of the welding conditions, material composition, and average grain size on the kinetics of the grain boundary segregation in the Inconel 718-type nickel-based superalloy during laser welding were optimized. The grain boundary segregation of boron near the fusion boundary is of particular interest, and is closely correlated to the intergranular heat-affected zone (HAZ) liquation cracking. It is indicated that the low heat input, fine-grained material and full penetration contribute to the reversible desegregation of boron and suppress the grain boundary segregation of boron to significantly minimize the segregation-induced grain boundary liquation and improve the weldablity. The subsolidus temperature due to nonequilibrium weld pool solidification is capable of ameliorating the segregation kinetics to reduce the HAZ grain boundary segregation. Intergranular HAZ liquation cracking is evitable with a crack-free weld without using filler wire. The grain boundary segregation decreases and the threshold tensile stress of solid-liquid interfacial decohesion across the intergranular liquid film simultaneously increases in the recrystallized HAZ during the weld shape change from partial penetration to full keyhole penetration. Furthermore, the numerical analysis results are verified indirectly by the experiment results of the total crack length. In addition, this metallurgical modeling is also applicable for the alloying segregation behavior prediction of other nickel-based superalloys with similar metallurgical properties.
Investigating the influence of flowing fluid on the resistance of materials to sulfide stress cracking
Authors: Rihan R , Al-Wakaa B , Tanoli N 
Published: March 2020

Abstract
The study aims to investigate the effect of flowing fluid on the susceptibility of metals and alloys to sulfide stress cracking (SSC) using the fracture mechanics circumferential notched tensile (CNT) specimen. The CNT specimen has never been used in the presence of flowing fluid. A novel testing flow loop was invented for performing the experimental work. The new testing rig can be used for determining the stress intensity factor (KI), threshold stress intensity factor (KIssc), and crack growth rate in flowing fluid for different materials in different corrosive environments at different temperatures. The testing flow loop has been registered as a patent in recognition of its novelty and practical applications in several industries. The experimental conditions were testing the resistance of heat treated P110 steel to SSC in deaerated stagnant and flowing solution containing 0.01 M Na2S2O3 (as a source for H2S) and 3.5 w% NaCl at room temperature. The experimental results show the heat treated P110 steel was susceptible to SSC in stagnant solution, while it was not susceptible in flowing fluid.
The application of broken expanded polystyrene particles in thermal insulation coating material
Authors: Zhang Y , Li S Y 
Published: March 2020

Abstract
Thermal insulation coating material is a kind of green thermal insulation material with high efficiency, which is used in the exterior wall of buildings and has many advantages such as strong sticking strength, low heat conductivity, flame retardancy and water resistance. The aggregates, main insulation components, play an important role in the thermal insulation coating material. Expanded polystyrene (EPS) particle is a good material, which can be used as an aggregate for its low thermal conductivity coefficient of 0.029 W/(m·K). Accordingly, by using the broken particles prepared from wasted expanded polystyrene, (EPS), the abandoned resources can be recycled and used again, resulting to the reduction of “white pollution” and cost. In the environment of establishing an economical social, it has huge significance and broad market prospects. Studies have shown that the broken expanded polystyrene particles and expanded perlite have the lowest thermal conductivity according to the weight ratio of 1:2.96. By using wasted expanded polystyrene particles and expanded perlite as aggregates, the thermal insulation coating material has good crack resistance, thermal insulation and compressive strength.
Acceptability analysis for determining the average grain size by ASTM E112 standard
Authors: Bi Geping , Guan Yong , Chen Xiaoyu , Tan Wenhua , Huang Wenniu , Gao Yuqing , Wang Meimei 
Published: March 2020

Abstract
In this paper, the ASTM grain size number of aluminium alloy specimen was determined by the Abrams three-circle procedure and planimetric procedure, according to ASTM E112-13 standard, and the measurement uncertainty was evaluated. Based on the test data and theoretical analysis, the %RA limit for acceptability of ASTM E112 grain size measurement was discussed. The following two corrections are made: when G is determined via the Abrams three-circle and planimetric procedures, the %RA limit should not exceed 8.4% and 16.1%, respectively, instead of earlier regulated value of 10%.
Influence of additives on polycarbonate/acrylonitrile-butadiene -styrene blending for fused deposition modeling
Authors: Chen Y W , Yin Y , Feng L , Ling X , He J K , Lai W W , Wang Y 
Published: March 2020

Abstract
This study aimed to investigate the use of polycarbonate (PC), acrylonitrile-butadiene-styrene (ABS), PC/ABS/maleinized acrylonitrile-butadiene-styrene copolymer (ABS-g-MAH) composite, PC/ABS/methyl methacrylate-butadiene-styrene (MBS) composite, and PC/ABS/organic montmorillonite composite for fused deposition modeling experiments and compare their mechanical properties. The tensile test results of specimens printed with different orientations revealed that PC/ABS compatibilized by 7% MBS exhibited the highest tensile elongation of the samples built in a horizontal orientation. Moreover, PC/ABS compatibilized by 6% ABS-g-MAH showed the greatest tensile strength between the three composite specimens printed with horizontal orientations. The notch impact test results revealed that PC/ABS/ABS-g-MAH and PC/ABS/MBS composite specimens printed with horizontal and vertical orientations were much stronger than the other systems.
Application of GeTe phase-change films in the directly heated two-port switch design
Authors: Qu S , Zhang J H , Gao L B , Chen H W , Li X , Wang J M 
Published: March 2020

Abstract
Phase-change (PC) materials offer the property of thermally induced reversible change and exhibit different resistance values due to the structure changes between crystalline and amorphous phases. In this work, GeTe films with a thickness of 100 nm were deposited on the glass substrates by radio-frequency magnetron sputtering and annealed at different temperatures. The XRD analysis showed diffraction peaks corresponding to the rhombohedral structure of c-GeTe (021), (200), (202), and (220), respectively. Upon annealing at 300 and 340°C, the rhombohedral structure would transform into a rock salt structure. The Raman analysis revealed that a-Ge-Te covalent bond is the mixed structure of tetrahedron and defective octahedron changing into tetrahedral cells. The resistivity declined sharply from 0.72 to 3.8× 10−6 Ω-m, whereas the Hall mobility of holes sharply rose to 300 m2/Vs. Based on the above films, a two-port directly heated switch device was designed and fabricated in sandwich structure to verify its phase-change characteristics. Low-resistance state was converted from crystallization with a 20ns 9V voltage pulse, while high-resistance state was by passing a 2 μs 2V voltage pulse. The on/off resistance ratio of switch could reach five orders of magnitude, while the switch state remained stable after the process termination. The results obtained strongly suggest that GeTe is a promising material for RF switches.
Formulation of EPDM heat-resistant V-ribbed belt
Authors: Ling X , Hu Y L , Lai W W , Wang Y 
Published: March 2020

Abstract
As a major pillar industry of the national industrial economy, the automobile industry has been greatly affected by the increasingly strict requirements of environmental protection in recent years. With the constant promotion of new energy vehicles, further compression of costs and improved performance will enable enterprises to occupy a place in international competition. In terms of the belt material of automobile engines, HNBR and EPDM, which are better in performance, are gradually replacing the traditional CR to adapt to the more demanding working environment. Compared with HNBR, EPDM is cheaper. In this paper, the effects of carbon black N330 and nylon staple fiber and their dosage on the properties of EPDM wedge rubber were studied by orthogonal test method to find the best formula. Studies have shown that the nylon fiber content has a great influence on the physical properties of EPDM wedge rubber, and comes to the influence of carbon black N330 content. The interaction between them is not obvious. When the content of the nylon fiber is 5phr and the content of the carbon black is 65 phr, the rubber wear rate after vulcanization is 15.5%, and the storage modulus at 120°C is about 60% at room temperature, its strength, heat resistance and aging resistance are excellent.
Mitigation of uncommon peel-off defects in galvanized steel sheets
Authors: Fang F , Zhang W H , Chen Y M , Zhou W Q 
Published: March 2020

Abstract
Galvanizing defects occurring in hot-and cold-rolling procedures were studied by scanning electron microscopy and focused ion beam, and analyzed via the JMP software. The results show that, among the 200 bright spots dispersed along the hot dipping steel plate, the defect may be misidentified as zinc slag by the representation of coating surface, but there exists a tiny peel off on the matrix without oxide particles under each spot. Upon partial removal of zinc coating, a tiny iron film outcropped from the coating was revealed. As some of iron films are not adhered to the matrix, such outcrops are not detected. The cross-sectional morphology shows the formation of inhibition layer, with no oxide between the peel off and matrix. The relative cold and hot rolling plates are also analyzed to trace the source, that the defect is inherited from hot rolling process according to the results. By using JMP to calculate the relationship of hot rolling parameters with the defect, slab heating temperature is concluded as a strong correlation condition. The high slab heating temperature ensures smooth rolling procedure, but the intergranular binding force is too low, which enhances the coating surface separation from the matrix. After reducing the slab heating temperature from 1350 to 1300°C or lower, and optimization of descale and pickling parameters, the occurrence ratio of bright spot defects caused by peel-off was significantly reduced.
Numerical simulation of force characteristics and contact loss of high-speed railway subgrade
Authors: Wang Y H , Xiao H , Lv Y X , Lv S 
Published: March 2020

Abstract
In order to explore the dynamic stress distribution, attenuation characteristics of subgrade under high-speed train load, a three-dimensional solid model was established by the ABAQUS finite element software, and the dynamic stress characteristics of subgrade of high-speed railway were calculated and analyzed. The research results show that: The distribution of additional dynamic stress on the surface of subgrade is close to elliptical, and the distribution on the cross section is similar to saddle-shaped; the peak value of stress appears below the rail. The additional dynamic stress of the subgrade has no superposition effect between the front rear bogie and the rear front bogie of the two trains. The additional dynamic stress distribution of the subgrade surface can be regarded as four stress waves that do not overlap each other. When the contact degradation shape of the subgrade gravel and the track structure concrete base is assumed to be rectangular, the aspect ratio is between 2 and 3.3. With the deterioration of the contact state, the maximum additional dynamic stress of the surface layer of the subgrade is 120 kPa.
Interfacial reactions and structural properties of explosively welded titanium/copper plates
Authors: Paul H , Chulist R , Miszczyk M M , Cios G , Galka A , Skuza W , Petrzak P , Mania I 
Published: March 2020

Abstract
In this study, the effect of post-processing heat treatment on the interface morphology and kinetics of intermetallic phase growth in titanium/copper bimetallic sheets were analyzed using a scanning electron microscopy and mechanical testing. Ti/Cu composite was fabricated by explosive welding. Then, clads were subjected to the post-welded annealing at 973 K for times ranging between 15 min and 100h. In the as-bonded state, the interface shows a wavy character with a limited number of melted zones, which are mostly composed of phases that are not observed in the Ti-Cu equilibrium phase diagram. Short-term annealing is shown to transform non-equilibrium phases into equilibrium ones, such as TiCu4 and Ti3Cu4. For longer annealing times, the growth of four intermetallic sublayers (Ti2Cu, TiCu, Ti3Cu4, and TiCu4) distributed along the entire interface is detected. However, the growth kinetics of particular sublayers was different. Volume fraction estimation of intermetallic phases at annealing times under study revealed the largest thickness for TiCu and TiCu4 phases. The nano-hardness of intermetallic sublayers was found to drop with the Ti content.
Analysis of factors influencing the steel sheet surface waviness in cold rolling process
Authors: Guo J , Meng Q G , Zuo H X 
Published: March 2020

Abstract
In order to study the influence factors of steel sheet surface waviness in cold rolling process, using coherence scanning interferometry, the surface waviness with different cold rolling processes had been investigated at room temperature, and without condensation according to relevant standard. The results show that the surface waviness of the typical steel was successfully evaluated, while the mill reduction rate, working roll cycle, and temper rolling elongation were found to be the most informative for surface waviness parameters Wa0.8
and Wsa1-5
It was found that the surface waviness parameters Wa0.8
and Wsa1-5
sharply increased with increasing rolling reduction rates in rolling process, and vice versa. Moreover, in the continuous annealing process, finish rolling temperature had almost no effect on the waviness. In temper rolling, the surface waviness parameters Wa0.8
and Wsa1-5
gradually increased with elongation and dropped with increasing working roll period. Ultimately, it was proved that the control measures to improve the surface waviness of steel plate in cold rolling process successfully improved the product surface quality.
Design and simulation analysis of an aerospace damper
Authors: Wang Q L , Wang Q X , Jiang H J , Lin Y H , Zhou X H 
Published: March 2020

AbstractIn this paper, viscoelastic materials are used to attenuate vibration for the optical remote sensor and satellite base. Flexible-base single-degree-of-freedom vibration attenuate system model is built considering that the satellite base is not rigid. The transfer ratio of the vibration damping system when the satellite platform foundation is non-rigid is obtained by using the four-terminal parameter method and the mechanical impedance method. Furthermore, the effects of mass ratio, fundamental frequency ratio, basic damping ratio and damper damping ratio on the vibration attenuate efficiency are discussed. According to the properties of integrated space optical remote sensor and satellite base, the optimum parameter combination between damping ratio and vibration attenuate efficiency is obtained. The design schemes of the viscoelastic material damper are refined using the simulation analysis results.
Low-frequency band gaps in Y-type phononic crystals
Authors: Ma X F , Xiang J W 
Published: March 2020

Abstract
In this paper, an Y-type of locally resonant phononic crystal (LRPC) material model is analyzed in detail. Some geometric parameters of the material model are investigated using FEM to assess the trends of band gaps (BGs). The BGs results show that the material model can open a low-frequency BG less than 200 Hz. When the lattice constant of the material model cell is determined, the geometrical parameters of scatterers are found to be the key to open BGs. The results show that the effect of the scatterer on BGs is studied by adjusting the two ratios (the ratio of the square bottom edge length to height of the scatterer composed of lead and the ratio of the square bottom edge length to height of the scatterer composed of aluminium), respectively. The changes of the two ratios have little effect on the upper edge of BGs. Similarly, the change of the ratio of the scatterer composed of aluminum has little effect on the lower edge of BGs. However, the variation of the ratio of the scatterer composed of lead can make the lower edge of BGs lower and increase BGs width. The vibration and noise reduction devices with different working frequencies can be designed by adjusting the geometric parameters of the scatterer.
Band gaps of a fan-like solid-fluid phononic crystal
Authors: Zhai H F , Xiang J W 
Published: March 2020

Abstract
The vibration problem has a serious impact on modern life. The phononic crystal (PHC) is a periodically arranged composite material, which has good vibration attenuation capability because of its band gap (BG) characteristics. Most of available PHCs are limited to solid structures and the application ranges are limited. In this paper, a new fan-like solid-fluid PHC structure is proposed to supress vibration in special environment. Firstly, the unit cell of fan-like PHC is built and the corresponding band structure is further calulauted by finite element method (FEM). The band structures reveal that this fan-like PHC structure has four BGs below 10000 Hz. In order to illustrate the functionality of the fan-like PHC structure for vibration attenuation, the frequency response function (FRF) of a finite fan-like PHC structure is calculated. The FRF shows that there are strong attenuations in the ranges of BGs. Finally by adjusting the side length of the square inclusion, the influence of the filling rate of the scatterer on BGs is studied. This new PHC provides new ideas for the vibration attenuation of builds at the riverside.
Electrochemical analysis of the inhibition performance of glucobiogen on low-carbon steel in neutral chloride solution
Authors: Loto R T , Fajobi M , Oluwole L , Loto C A 
Published: March 2020

AbstractThe inhibition performance of glucobiogen (GBN) on low-carbon steel (LCS) corrosion in neutral chloride solution (3.5% NaCl in H2O) was evaluated by potentiodynamic polarization, metal weight loss measurement and optical microscopy characterization. Data obtained showed GBN effectively inhibited the LCS corrosion with inhibition efficiency exceeding 80 and 90% from potentiodynamic polarization test and weight loss measurement. GBN, at lowest concentration performed poorly with inhibition efficiency value below 50%. The inhibition performance of GBN showed mixed type inhibition effect with higher tendency for anodic inhibition from relative shift in corrosion potential. Inhibitor adsorption on LCS was determined to be physisorption with respect to the Langmuir and Frumkin adsorption isotherm. The optical microscopy characterization revealed that GBN hindered the formation of corrosion pits and general surface deterioration of LCS.
Analysis of nuclear radiation damage effect on typical materials
Authors: Sun S H , Xie X , Wu F 
Published: March 2020

Abstract
In order to evaluate the effects of nuclear radiation on several typical materials, the mathematical models of radiation damage characteristics of three materials are established based on the analysis of radiation environment and damage forms. In order to simplify the calculation, the principles and indexes of damage estimation are determined according to the radiation damage process of three typical materials: polymer materials, high-energy explosives, and metal materials. The results show that the pure nuclear radiation environment has no obvious effect on the properties of three typical materials. It lays a theoretical foundation for radiation hardening of devices.