bluuebunny/crossref_metadata_2025_split huggingface dataset:
Splashing of droplet under the vibration effect of flexible membrane
Authors: Lee Sanghyun , Lee Sangmin 
Published: August 2023

Abstract
The impact dynamics of a droplet falling onto a substrate is significant in various applications such as inkjet printing, spray coating, and bioprinting. Generally, several factors, such as the fluid properties (e.g. viscosity or surface tension) and substrate characteristics (e.g. surface roughness or flexibility) govern whether falling droplets spread or splash. In this study, we experimentally investigate droplet impact dynamics on a thin, flexible membrane for various Weber numbers (230 < We < 600) and membrane stiffnesses, which can be controlled by the applied tensile force. In addition, the effect of membrane vibration on impact behavior is considered. In the high Weber number regime, splashing is dominant, regardless of the membrane stiffness. In contrast, in the low Weber number regime, a transition between splashing and deposition is observed, depending on the membrane stiffness. In short, flexible membrane vibration induces droplet splashing despite the insufficient kinetic energy of the droplet. Increasing the stiffness of the membrane contributes to the suppression of droplet splashing by minimizing membrane vibration.
Low-density HiPIMS favored ultrathick and compact chromium coatings on Zircaloy-4 alloys
Authors: Zhou Guangxue , Zuo Xiao , Chen Rende , Wang Zhenyu , Ke Peiling , Wang Aiying 
Published: August 2023

Abstract
Protective metallic coatings are receiving increasing attention to modify the anti-corrosion and oxidation resistance of zirconium-based fuel cladding tubes under harsh high-temperature steam/air oxidation conditions. In this work, ultrathick (∼20 μm) and compact Cr coatings with (001) preferential orientation were deposited on Zircaloy-4 (Zry-4) alloy by high power impulse magnetron sputtering (HiPIMS) technique. The growth characteristics of the Cr coatings were investigated as a function of the discharge plasma species, including Cr+, Cr*, Ar+, and Ar*, which were controlled by the different discharge modes during HiPIMS process. The results showed that, when the discharge feature was changed from the ‘low voltage direct current magnetron sputtering (DCMS)-like’ mode into a ‘low density HiPIMS’ mode, a rapid increase of Cr+ content in the substrate vicinity was obtained by time-integral optical emission spectra (OES), indicating a remarkably enhanced incident energy flux to the deposited Cr coating. The generalized temperature increment of the Cr coating growing surface calculated from the OES, was ∼100 K and was mainly affected by the incidence of Cr* atoms. A simplified collision model based on the non-penetrating ions/atoms assumption was also proposed to calculate the transferred energy from the incident energetic species and thus understand the predominant effect of HiPIMS Cr plasma on the achieved nanocrystalline Cr coating with ultra-thick and dense structure, which is still quite challenging for the DCMS deposition process.
Multichannel filtering properties of one-dimensional graphene photonic crystals with high refractive index media layer
Authors: Wu Jijiang 
Published: August 2023

Abstract
Graphene photonic crystals have been attracting increasing attention due to their distinctive properties. In this work, the multichannel filtering performance of a one-dimensional graphene photonic crystal structure is theoretically investigated in the optical communication band. The graphene photonic crystal composed of a stack of alternating layers of dielectric material with high refractive index and graphene sheet. The influence of several structural parameters on the filtering performance of this structure was analyzed using the transfer matrix method. It is shown that the channel number and channel spacing of the multichannel filter can be adjusted by changing the period number and the dielectric constant and thickness of the high refractive index material. The multichannel filtering properties of this graphene structure have potential applications in wavelength division multiplexing systems.
Stability analysis and optimal control strategies of a fractional-order monkeypox virus infection model
Authors: El-Mesady A , Adel Waleed , Elsadany A A , Elsonbaty Amr 
Published: August 2023

Abstract
In this study, the spread of the monkeypox virus is investigated through the dynamical study of a novel Caputo fractional order monkeypox epidemic model. The interaction between human and rodent populations along with the effects of control signals are considered in the model. These control signals are established through the optimal control strategy. Furthermore, the effect of memory is examined via varying fractional order parameters in the model. The influences of other parameters are also examined. The positivity and boundness of the solution are verified through theoretical analysis. In addition, the equilibrium points for the system are obtained for both the free and endemic cases, and the local stability has been studied. To verify the theoretical findings, numerical experiments are conducted. The optimal control signals are obtained and verified through numerical simulations of different configurations of control parameters. From these simulations, it is found that the optimal control scheme can help in reducing the size of the infected, quarantined, and exposed categories while increasing the susceptible and recovered categories. These acquired results can provide some assistance to governments in providing some preventive control to suppress the spread of the virus.
Evaluation of Fastener Flexibility in Hybrid CFRP and Metal Joints Using the Finite Element Method
Authors: Huang Fu , Wang Tong , Lin Yuxiang 
Published: August 2023

Abstract
The fastener flexibility is one of the most important factors affecting the fatigue life of the joints. A three-dimensional model was established by ABAQUS software to simulate the load-displacement curve of a single shear fastener under tensile load. The fastener flexibility was calculated from the simulated curve and compared with the experimental results. The effects of the element type, hole gap, clamping clearance and clamping length on the prediction accuracy and fidelity of the finite element method (FEM) model were also investigated. It was shown that the simulation results agreed well with the experimental results. The modelling method was demonstrated to be usable for subsequent structural analysis and design.
Experimental study on the pull-off load-bearing capacity of composite sandwich T-joints by tenon-and-mortise
Authors: Guo Xiaoning , Zhang Kuan , Zhang Xiaojing 
Published: August 2023

Abstract
In this paper, an experimental study of pull-off load-bearing capacity and damage mode was conducted for tenon-and-mortise glued T-joints of composite honeycomb sandwich structures. Five test pieces of T-joints with different tenon widths and different numbers of tenons with the same total tenon width were investigated. The results of the pull-off tests showed that the tensile failure of the gluing surface occurs first in the tenon shoulder region during loading of the T-joint, after which the tenon region takes most of the load until the shear failure of the gluing surface of the bottom plate and the web in the tenon region or the panel pulls off. For the composite honeycomb sandwich structure tenon-and-mortise glued T-joints, increasing the width of the tenon makes an important contribution to improving the pull-off load capacity of the T-joints; when the total width of the tenon is the same, the pull-off load capacity of the T-joints decreases when the number of tenons increases.
Analysis of the Boronizing Process of High-vanadium Alloy Steel
Authors: Fu Yuzhu , Tong Weiping 
Published: August 2023

Abstract
The high-vanadium alloy steel substrate surface was carried out by solid powder boronizing. The results showed that a certain thickness and compact structure of the boronizing layers could be obtained after boronizing. The thickness of the boronizing layer was about –53 μm; the thickness of the transition zone was about –36 μm, and the boronizing layer was combined with the substrate firmly. The boronizing layers consist of FeB and embed into the substrate like a spider. The alloying elements have little effect on the formation of sawtooth morphology in the boride layers. The thickness of the boronizing layers increased with the boronizing time and temperature increase, and the thickness of the boronizing layer has a parabola relationship with the processing time.
Load transfer analysis of aircraft composite-metal hybrid joint fasteners under combined external loads and temperature
Authors: Huang Fu , Gu Liangfan , Wang Tong , Zhang Xiaojing 
Published: August 2023

Abstract
Due to the different thermal expansion coefficients of composite materials and metal materials, the variation of ambient temperature changes the load transfer ratio of composite-metal hybrid joint structures. In this paper, the Finite Element Method (FEM) is used to study the combined effects of external load and temperature field on the load distribution of CFRP-aluminium alloy single-lap hybrid joints. The effects of the temperature rise and fall on load transfer are considered. The simulation results show that the most dangerous position and the load transfer ratio of the hybrid show significant joint changes after the combination of the temperature effect under the external load.
Experimental Study on Dynamic and Static Tensile Properties of a New Environmental Protection Material
Authors: Wang Feng , Ma Yurong , Li Haixia , Shen Man , Jiang Yaqiong , Han Qianwen 
Published: August 2023

Abstract
Carbon fiber concrete (CFRC), a late-model environmentally protection material, is formed by mixing chopped carbon fibers into concrete. It can raise static tensile strength and deformation resistance with effect. To further explore the safety of CFRC under dynamic load, this paper studies the factors affecting dynamic and static tensile properties of CFRC by using the SHPB device as an experimental means. The stress rate and chopped carbon fiber content are taken as variables to discuss the difference in tensile strength in the two types of load states. Experiment results show more fiber content in the initial stage can raise the static tensile strength of concrete significantly. However, its increase range has a decreasing trend, while the mixing of excessive carbon fiber reduces its dynamic tensile strength. The dynamic mechanical properties rise by adding stress rate, showing an obvious rate effect. There are significant differences in the influence of carbon fiber on the strength of concrete under two load states. Therefore, the carbon fiber content should be properly selected when designing the concrete mix proportion to satisfy different load states under specific working conditions. This paper provides a reference for the design of new environmental protection materials.
Analysis of interfacial de-bonding failure on stiffened composite panel
Authors: Cheng Linan , Chen Xiangming 
Published: August 2023

Abstractor
This article aimed at the interfacial de-bonding between the stringer and skin when the structure is under post-buckling loads. A four-point bending test was set up, and the cohesive zone model (CZM) was employed considering the effects of through-thickness compression on the inter-laminar shear failure of composite laminates. The numerical result is in good agreement with the experimental one. The results indicate that: embedded defect at the flange/skin interface has a slight influence on the load capacity of the structure, but embedded defect at the flange/radius-filler interface has a significant influence on the load capacity of the structure, and delamination always initiated at the flange/radius-filler interface. The presence of inner corner defects in the filled area has a greater impact on the load capacity of the structure, the load capacity is in direct proportion to the width of corner defects.
The Effect of Prefabricated Damage on Compression Behaviour of Stiffened Composite Panels
Authors: Cao Su , Chen Xiang Ming , Peng Lei , Wei Jing Chao , Cheng Li Nan , Jiao Qu Tian 
Published: August 2023

Abstract
Experimental investigations were conducted on the post-buckling behaviour and the failure behaviour of hat-stiffened composite panels. Two types of panels were tested, including undamaged and pre-damaged configurations. All panels were loaded under unidirectional compressive loading until collapse. The presence of a disbond between skin and stringer weakened the ultimate failure strength evidently but did not affect the overall structural stiffness significantly. The debonding defect affected the buckling response and changed the post-buckling deformation and failure behaviour of stiffened panels. For the pre-damaged type, massive debonding in the interface between skin and stiffener was detected, which led to the reduction of the load capacity of the structure, and a small margin between buckling load and failure load was observed.
Design of a Highly Sensitive Ionic Conductive Hydrogel Sensor based on the Kirigami Structure
Authors: Guo Yuhan , Yang Qingsheng 
Published: August 2023

Abstract
Conductive hydrogels are polymers that respond to mechanical stimuli and have been widely used in wearable sensors and soft machines. Myriads applications posed high-performance requirements for hydrogels: compliance, stretchability, and high sensitivity. However, sensors based on flexible polymers often struggle to achieve a highly sensitive response. We propose a highly sensitive hydrogel strain sensor based on the Kirigami structure. The structure solves the problem of low stretchability caused by the high stiffness of double-network hydrogel. It greatly improves the stretchability of the strain sensor by customizing the cutting of a high-toughness PAAM-PAA double-network hydrogel. We further analyze the deformation and sensing characteristics through simulation and experiments and successfully apply them to monitor human motion.
Pavement performance of previous pavement materials based on CAVF design
Authors: Wang Weiming , Yu Shuhui 
Published: August 2023

Abstract
Based on the coarse aggregate void filling method (CAVF), four kinds of permeable asphalt mixtures (PAC) with target voids of 18%, 20%, 22%, and 25% respectively were designed, and their road performance was comprehensively evaluated by a series of laboratory tests, such as permeability tests, immersion Marshalls, freeze-thaw splitting, rutting, low-temperature bending, four-point fatigue bending, and so on. The experimental results show that the CAVF method is more accurate and PAC designed by the CAVF method has more connected voids and better pavement performance. The optimal design void ratio of the PAC is 22%.
A Torsional Negative Poisson’s Ratio Structure: Dynamics and Energy Absorption Performance
Authors: Wang Shuai , Chen Zhuo , Li Jialu , Wang Xin , Zhen Zixuan 
Published: August 2023

Abstract
The crash box’s internal structure can be designed to absorb more energy in a significant way. Using the finite element method, this paper investigates a structure with a negative Poisson ratio and a self-torsion effect. The arrangement and combination of eight structures have a torsional Poisson ratio that is negative. The optimal energy absorption of LCHC-B structures, as determined by simulation analysis, results in an excellent performance. Due to structural asymmetry, the LCHC-B structure has large deformation characteristics and self-torsion, making the structure’s displacement greater than that of the conventional negative Poisson ratio structure and exhibiting excellent energy absorption properties.
Heat treatment enhancing the hydraulic fracturing performances of Al-Cu-Ga-In-Sn alloys
Authors: Wang Shaocheng , Wang Sibo , Tu Dianya , Huang Linjiang , Qu Yijia 
Published: August 2023

Abstract
For improving the mechanical properties of Al-Ga-In-Sn alloys used to make dissolvable hydraulic fracturing tools, the effects of Cu and heat treatment on the microstructures and the Al-water reactivities of Alloys with Cu addition were investigated. The XRD and SEM were employed to investigate their microstructures. When the Cu content of alloys is above 1 wt%, Cu can dissolve in Al grains and form CuAl2 phases at Al grain boundaries, which can strengthen Al-Cu-Ga-In-Sn alloys. Cu will not form intermetallic compounds with Ga, In, and Sn, so liquid GIS phases are still observed at Al grain boundaries. The Cu and Ga atoms can diffuse from CuAl2 and GIS phases to Al grains during solution treatment. The CuAl2 phases can precipitate in Al grains during the artificial aging treatment of alloys. The increment of Cu, and Ga contents of Al grains, and the formed CuAl2 precipitates in Al grains will further strengthen the heat treatment alloys. Al-water reactivities of as-cast and heat treatment alloys were performed in different water temperatures. The solute Cu in Al grains and CuAl2 phases at Al grain boundaries will occupy the contacting sites for Al reacting with water, leading to H2 generation rates and H2 yield of reactivity of Cu-bearing alloys with water decreasing. After heat treatment, the increment of Cu content and CuAl2 precipitates in Al grains will occupy more contacting sites for Al reacting with water, resulting in a lower H2 yield of Al-water reaction of heat treatment alloys than that of as-cast alloys.
The Effect of Steel Fiber Length-to-Diameter Ratio and Dosing on the Mechanistic Characteristics of Concrete
Authors: Li Jiuyang , Wang Zhenwei , Chen Li , Guo Jinpeng , Hu Guangchao 
Published: August 2023

Abstract
In this paper, the effects of three kinds of steel fibers with different aspect ratios on the slump, compressive intensity, and splitting tensile strength of concrete were studied. The results show that the slump for the steel fiber-based polished concrete reduces with the amount of admixture of steel foundation. The slump of concrete with steel fibers of larger length and diameter is reduced at the same volume of admixture. The compressive intensity and the cleavage intensity of the concrete mixed with steel fibers are increased to different degrees than the vegetal one. Among them, the average decompressive force is increased by nearly 15%, and the cleavage tensile strength is significantly increased. It is indicated that the cracking characteristics of the steel fiber concrete have also been improved, and the toughness of the concrete has been enhanced.
Effect of Ultrasonic Treatment on Microstructure and Properties of Gray Cast Iron
Authors: Ya Bin , Ji Shengchen , Meng Linggang , Zhou Bingwen , Ning Hangbo , Lou Xinyu , Li Xiaoyan , Jiang Ailong , Du Jizhu , Zhang Xingguo 
Published: August 2023

Abstract
The effect of ultrasonic treatment on the microstructure and properties of gray cast iron was studied. The samples were analyzed by metallographic microscope, scanning electron microscope, Brinell hardness tester, electronic universal testing machine, etc. The results showed that ultrasonic treatment could improve the pearlite content in the microstructure. After ultrasonic treatment, the tensile strength of gray cast iron can be improved to 266 MPa, which is 11.60% higher than that of the samples without ultrasonic treatment. Ultrasonic treatment can refine the size of graphite, which can reduce the stress concentration. In addition, the pearlite lamellar spacing can also be reduced, which is the main reason for improving the mechanical properties of gray iron.
Stress evolution of TBCs considering the micro morphology characteristics with multi-oxides growth
Authors: Du Hao , Chai Yijun , Yang Xiongwei , Li Yueming 
Published: August 2023

Abstract
Thermal Barrier Coatings (TBCs) are a fundamental technology for safeguarding aircraft engine blades from high-temperature environments. Under long-term exposure to a high-temperature environment, breakaway oxidation of multi-metallic metals occurs in TBCs. The growth of multi-metal oxides and stress evolution in the TBCs after breakaway oxidation is very complex for a real coating microscopic morphology. In this paper, we use the CT image technology to construct the TBCs model of the reflective TBCs microscopic morphology and use a user-defined element (UEL) subroutine involving the growth of the multi-oxides model to calculate the stress. We focus on the evolution of interfacial stress in the first and second oxide stages. The results show that the micro defects will cause multiple increases in the maximum stress near the defects in TBCs. Meanwhile, microscopic defects near the interface can bring a sharp increase of tensile stress in the local area during the cooling stage, which can easily cause cracking and delamination of the interface.
Finite element research on anti-seismic property of precast reinforced concrete frame with damped joint of beam and column
Authors: Wu Zhong-tie , Xie Ning 
Published: August 2023

Abstract
To research the anti-seismic performance of prefabricated concrete structures with damped beam-column joints, several different types of finite element patterns were set up by ABAQUS finite element software. The analysis of the low-cycle repeated loading test was conducted. This paper mainly studied the lose efficacy mode, hysteresis loop, skeleton curve, drawability, rigidity degeneration, and energy consumption ability of a prefabricated concrete frame with a damped beam-column joint. It discussed the influence of different forms of filling materials and axial pressure ratio on their seismic performance. The results showed that the rubber hardness had a minor effect on the nonlinear mechanical properties of the frame. The larger the axial pressure ratio is, the greater the bearing ability of the damping frame is. The smaller the stiffness degradation is, the lower the ductility performance is. When the axial pressure ratio is small to a certain numerical value, the frame lose efficacy will change. The prefabricated frame with a damped beam-column joint has good seismic performance.
Experimental Study on Mechanical Response of Oil and Gas Pipelines under Ground Subsidence
Authors: Lin Liang , Lou Yuhuai , Guan Enjun , Ding Fengbin , Ding Xiaolin , Zhang Yu 
Published: August 2023

Abstract
At present, accidents of buried pipelines caused by localized ground subsidence are reported frequently. Understanding the mechanical response of pipe soil during subsidence is of great significance to the safe operation of buried pipelines. This paper studies the stress state of buried oil and gas pipelines and their surrounding soil through a series of large-scale model tests in the process of localized ground subsidence. The experiment results show that during the process of subsidence, the axial and hoop strain of the pipeline increases with the expansion of the subsidence area and the subsidence amount. The subsidence amount has a relatively greater influence, and the distribution characteristics of the pipeline strain present obvious regional characteristics. The earth pressure around the pipe shows different changes in the process of subsidence, among which the earth pressure on the upper part of the pipe is the main one. The research results can provide a certain reference for the design and calculation of oil and gas pipelines under foundation settlement.