bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of γ-radiation on magnetoelectrical properties of Bi0.85Sb0.15 <Pbx> (0.001≤x≥0.05) solid solution
Authors: Tagiyev M.M. , Abdullayeva I.A. , S.G Jafarova 
Published: October 2024

Abstract
The influence of γ-quantum on the magnetoelectric properties of Bi0.85Sb0.15 <Pbx> (0.001≤x≥0.05) thermoelectrics doped with lead atoms at ~77÷300K and magnetic field induction up to 1.0 Tesla has been studied. It was found that at low doses of gamma irradiation of the Bi0.85Sb0.15 <Pb> solid solution, point defects are formed, which lead to an increase in the concentration of free electrons n, specific electrical conductivity σ and a decrease in the absolute value of the thermo EMF coefficients α and RH. As the dose of γ-quanta increases in the process of subsequent restructuring, point defects accumulate, i.e. accumulation of point defects, which leads to a decrease in the concentration of current carriers and a corresponding change in σ, α. and RH.
Design Verification and Performance Testing of Container Valves for Offshore 30Mpa IG541 Fire Extinguishing System
Authors: Shining Yuan , Guanglei Lv , Haichen Wang , Xiang Gao , Jun Chen 
Published: October 2024

Abstract
Addressing the challenges of large space occupation, limited transmission distance, and suboptimal fire extinguishing efficiency of the current 15Mpa IG541 gas fire extinguishing system commonly found on offshore oil production platforms and ships, especially in deepwater facilities where stringent requirements exist for both transmission distance and environmental performance. Increasing the storage pressure can enhance space efficiency and extend the transmission range of the extinguishing medium. However, the core component, the container valve of the 30Mpa IG541 system, has faced foreign bottlenecks in terms of availability and technology transfer. To address this situation, a domestically developed and independently intellectual property-protected 30Mpa IG541 container valve has been designed and tested. This design encompasses material selection, flow area calculations, action mechanism design, sampling port design, inlet and outlet thread selection, safety diaphragm design, and thread strength calculations. Subsequent testing confirmed its suitability, including functional testing, sealing tests, hydrostatic pressure testing, blast performance testing, and salt spray testing. The valve passed all tests with flying colors, ensuring reliable opening under 135MPa pressure. The container valve has also been successfully certified by DNV. This achievement lays the foundation for the next phase of certification by a classification society and the broader application of this 30Mpa IG541 system in offshore engineering.
Analysis of stiffness characteristics of helical compression springs used in high-precision instruments
Authors: Wang Yu , Zhang Chunguang , Li Shangqing , Li Zhichao , Gong Yingjiao , Liu Jiarui 
Published: October 2024

Abstract
Under working conditions of high-temperature, high-pressure, and strong corrosion, helical compression springs used in high-precision instruments need to maintain linear characteristics and impact resistance. To solve the problem of significantly reduced instrument accuracy due to the stiffness drift of current helical compression springs, compression stiffness characteristics are analyzed through compression tests and finite element simulations. The results indicate that the stiffness drift is caused by the sliding displacement of helical compression springs after being compressed and self-contacted. With the premise of minimizing overall effect on instruments, the helical compression spring structure was redesigned to eliminate the stiffness drift and meet requirements for impact resistance.
Ride comfort analysis on vehicle using a new nonlinear isolator for the seat suspension
Authors: Umair Muhammad , Hou Zhichao 
Published: October 2024

Abstract
Seat suspension plays a crucial role in attenuating low-frequency vibrations and improving overall riding comfort. This paper proposes a new nonlinear isolator for seat suspension using a novel high-static-low-dynamic stiffness with sliding mass inertia (HSLDS-SMI). The HSLDS-SMI seat suspension includes a negative stiffness structure and two secondary sliding masses. A multi-degree-of-freedom (MDOF) dynamic model is developed, comprising a simplified quarter-car model and a biodynamic human model. Various isolation performance indices are then considered and analyzed under two different road excitations using numerical methods. The impact of the sliding mass on ride comfort is examined under both road profiles. The findings demonstrate that the HSLDS-SMI seat suspension performs better than its two counterparts while ensuring the relative suspension deflection remains within acceptable limits.
Rolling Contact Fatigue Life and Categorization of Failure in Experiment of Flat PEEK Race-Alumina Ball Bearings in Water Lubrication under 1700 N at 1000 rpm
Authors: Matsubayashi Soji , Kajiwara Shuhei , Matsueda Takahiro , Kida Katsuyuki 
Published: October 2024

Abstract
The rolling contact fatigue tests of flat polyether-ether-ketone (PEEK) race-alumina balls bearings in water lubrication were done. From the experiments under 1700 N at 1000 rpm, three types of failures were obtained: a crater-shaped flaking, a rhombus-shaped flaking and a large cracking failures. To research the relationships between the failures and the lives, the surface properties near the failures were measured and observed. No relationships between the surface roughness and the life were found. On the other hand, the contact width of the shorter life specimen was larger than that of the longer life specimen. Two types of the flaking holes were compared to study the differences. The crater-shaped flaking hole exceeded the contact track, but the rhombus-shaped flaking hole existed inside the contact track. In addition, the crater-shaped flaking hole was shallower than the rhombus-shaped flaking hole. This means that the flaking mechanisms were different between them, i. e. the differences of the flaking mechanisms caused the differences of the life.
Research status on the effect of energy density on the forming microstructure and properties of nickel-based superalloys for laser additive manufacturing
Authors: Linjie Li , Quanwei Cui , Zhicheng Lu , Haoran Sun , Qiang Li , Wanli Guo 
Published: October 2024

Abstract
Nickel-based superalloys have excellent high-temperature mechanical properties, corrosion resistance and oxidation resistance, and strong machinability. It is widely used in aerospace, submarine and shipbuilding, petrochemical, electronic industry and other industries. However, there are still challenges in the popularization and application of nickel-based superalloys for alloy components with complex structures and extremely harsh working conditions. In this paper, the research status of the influence of energy density on the microstructure and properties of laser additive fabrication of nickel-based superalloys at home and abroad is reviewed. The influence of energy density on the microstructure evolution behavior and mechanical properties improvement effect of laser additive manufacturing nickel-based superalloys is summarized. The mechanism of energy density was discussed from the perspectives of microstructure evolution and macroscopic performance change. Based on the individual effects and synergistic effects of each process parameter, the influence of laser energy density on dendrite growth, phase precipitation characteristics, element distribution and porosity defect control effect of nickel-based superalloy was expounded, as well as the influence mechanism on microhardness, wear resistance and residual stress. Finally, the energy density optimization and development prospect of laser additive fabrication of nickel-based superalloys are prospected.
Development of Test Methods in the Process of Electrically Conductive Concrete Production
Authors: Savytskyi Mykola , Pang Weixiang , Sun Lijun , Savytskyi Oleksandr , Bordun Maryna , Li Yang , Xia Yanfang , Wang Haojie 
Published: October 2024

Abstract
Prevention of climate change, implementation of sustainable development principles in building industry, creation of Green buildings, Three-zero buildings (zero energy, zero emissions, zero waste), energy independent buildings maybe on the base of Smart Concrete. Electrically Conductive Concrete as type of Smart Concrete have the possibilities to create multifunctional hybrid structures for various purposes. The production of electrically conductive concrete is usually based on the introduction of carbon materials and carbon nanomaterials (CNMs) as electrically conductive fillers into its concrete composition. The theory of conductive percolation is used for design of electrically conductive concrete. To select electrically conductive carbon filler, it is necessary to summarize their electrically conductive characteristics. Today, there is no standard for determining the electrical conductivity of carbon fillers, nor is there a method for designing the composition of electrically conductive concrete; the development of both is imperative. Features of the preparation of electrically conductive concrete with hydrophobic carbon nanoparticles prone to aggregation are indicated. To obtain high quality electrically conductive products an operating system for quality control at the stages of the technological process of manufacturing must be proposed. Homogenization of the electrically conductive filler is very important. It is necessary to propose a method for assessing the stability of an aqueous suspension of a hydrophobic carbon material used for homogeneous distribution of a filler. Due to the lack of a standard, a method for determining the electrical conductivity of concrete is also needed.
Texture Evolution of High-purity Tantalum during 90°Clock Rolling
Authors: Zhang Song , Shi Jiaqing , Li Xun , Yu Xiaodong , Tan Chengwen , Nie Zhihua 
Published: October 2024

Abstract
When fabricating high-purity tantalum targets for the sputtering procedure of integrated circuit manufacturing, a through-thickness texture gradient can form in the rolled tantalum (Ta) plate. This texture gradient hinders the target sputtering performance, reducing chip reliability. This study investigated the texture evolution during the 90°clock rolling through experimental and simulation methods. Balancing the plane strain deformation with the surface shear strain deformation during fabrication and limiting the total rolling reduction to no more than 85% can weaken the through-thickness texture gradient in the Ta plate. A crystal plasticity finite element method (CPFEM) model was developed to simulate the 90°clock rolling procedure in the ABAQUS/Explicit software. The simulation and the experimental results are in agreement, with slight differences in texture type and intensity due to tantalum’s complex slip behaviors.
Study on the influence mechanism of austenitizing temperature on the surface of corrosion-resistant mold steel
Authors: Zhao Zhengrong , Zhang Yunfei , Zhao Yingli , Fan Mingqiang , Liu Yong , Mao Yaning 
Published: October 2024

Abstract
The microstructure of 4Cr13 corrosion-resistant plastic mold steel was studied. The martensitic experimental steel obtained by different heat treatment processes was used as the object. The effect of austenitizing temperature on its corrosion behavior was studied by microstructure characterization and electrochemical test. The results show that the microstructure of the test steel is mainly composed of martensite laths. Under the same experimental conditions, the corrosion resistance of the test steel decreases with the increase of austenitizing temperature, and the corrosion products are mainly composed of iron-containing oxides. The austenitizing temperature of 1000°C improves the corrosion resistance of the material, because the precipitation of a large number of small-sized Cr-containing carbides hinders the further erosion of the material and improves the surface quality.
Study of the influence of carbon nanotubes on the superconducting properties of YBCO composite
Authors: Tolendiuly S. , Sovet A. , Fomenko S. , Rakhym N. , Sadykov M. , Asylkhan Sh. , Bolatzhan K. 
Published: October 2024

Abstract
This article describes a method for producing a superconducting composite based on YBCO doped with carbon nanotubes by solid-phase combustion in an atmosphere of pure oxygen. It has been determined that the initial connection of the components, the ignition temperature and holding time, as well as the degree of doping with CNT nanoparticles affect the qualitative and quantitative provision of the superconducting Y123 phase, including its superconducting properties.
Improving performance of GFRP joints using bolted/mortise-tenon hybrid method
Authors: Yue YIN , Haipeng WU , Yunlong SUN 
Published: October 2024

Abstract
In this study, the effects of different connection methods such as adhesives and bolts on the performance of GFRP joints were compared. A hybrid method based on bolted/mortise-tenon was proposed, and the static strength of joints was studied through experiments and numerical simulations. Static trength testing using glass fiber reinforced polyurethane composites. The results showed that for adhesive-bonded joints, double-lap shear specimens have the highest shear strength. For bolted joints, double-lap specimens also have higher connection strength than single-lap specimens. And the strength of joints using bolts is much greater than that using adhesives. In addition, the bolted/mortise-tenon hybrid joint has a self-locking structure of dovetail and tenon connections, which converts shear strength into structural strength, effectively improves the load-bearing capacity, increases the reliability of the connection, and contributes to higher load-bearing capacity.
Corrosion study and microscopic analysis of X65 specimen by sulfate reducing bacteria
Authors: Guanglei Lv , Shining Yuan , Xiaobin Jiang , Yuanyuan Li , Minglei Xia , jie Qu , Donghong Zhao , Jun Chen 
Published: October 2024

Abstract
In this work, the corrosion effects of seawater and production water on X65 specimens with or without bacteria were studied, and weight loss analysis, scanning electron microscopy analysis, EDXA analysis, fluorescence analysis and bacterial content analysis were carried out. The results show that seawater corrosion of X65 is greater than production water. Compared with the sterilized water sample, the SRB in the bacterialized water sample slightly promoted the corrosion of X65, but the promotion effect of SRB on the corrosion of X65 within 7 days was rather limited. The high pressure or high temperature environment is not conducive to the growth and reproduction of SRB, and the remaining small amount of SRB promotes the development of surface pitting of X65 test pieces.
Study on the Stress Intensity Factor of Tilt Crack on the Inner Surface of Pipeline
Authors: Cui Jintai , Li Huifang , Qian Caifu , Wu Zhiwei 
Published: October 2024

Abstract
Cracking is one of the key factors jeopardizing the safe operation of pipelines, and Stress Intensity Factor (SIF) is an important parameter for evaluating the degree of crack danger. Cracks on engineering pipelines often appear in irregular patterns. In this paper, with FRANC3D crack analysis software, SIFs of the circumferential tilt cracks and axial tile cracks on the inner wall surface of a pipe under internal pressure were studied with concentration on the effects of the crack tilt angles. Mode I stress intensity factor weakening effect KI/K0 was defined and influences of the crack tilt angle, pipe and crack size on KI/K0 were investigated. With enough simulation results, empirical formulas for calculating the Mode I SIF for the circumferential or axial tilt crack were obtained by modifying the formulas for calculating the SIF of the crack in AMSE FFS-1.
Analysis of Combustion Characteristics of Can-Type and Annular-Type Combustion Chamber
Authors: Smitha D. , Satyanarayana M. R. S. , Srivastava Sachin 
Published: October 2024

Abstract
High performance is always desired for the propulsion system and the assortment of a better combustion type is also a vital part of the propulsion system. The analysis of different designs of combustion chambers and comparison of their combustion characteristics. In this paper, the assessment of Can-type and Annular-type combustion chambers and the design developed with SOLIDWORKS software and analysis done with ANSYS FLUENT. The systematic and translucent method approaches reduce the design complexity and time. The combustion with turbulence interface was examined to analyze with precision results, and the analysis specified that the nowadays experiment depends on the behavior of gas exit pressure, temperature, and velocity. Parametric analysis is used to acquire the sizing of the combustion chamber.
Deformation and enclosed volume change of axisymmetric non-linear dielectric elastomer membrane pump: a theoretical study
Authors: Kumar Nirmal , Sriharsha S.O.V. Jaswanth , Bollu Rakesh , Reddy Vancha Bhaavan 
Published: October 2024

Abstract
This work investigates the change in the enclosed volume of an axisymmetric non-linear hyper-elastic membrane pump subjected to dielectric actuation. The equilibrium equations in cylindrical coordinates, coupled with non-linear constitutive relations, are solved numerically to obtain the deformed membrane geometry under pressure loading (using Variational Calculus). The effect of dielectric actuation is then incorporated by considering the change in material properties and deformation induced by the applied electric field. The deformed geometry under dielectric actuation is determined, and the change in enclosed volume is calculated by comparing the deformed states with and without the applied electric field. The proposed approach enables quantifying the volumetric change in non-linear hyper-elastic membrane pumps due to dielectric actuation for potential applications in soft robotics, adaptive optics, and microfluidics. By non-dimensionalizing variables, key dimensionless parameters governing the problem are identified for broader applicability. Furthermore, this methodology can estimate volume changes for different electric actuations when a specific material is chosen with experimentally derived parameter trends, facilitating material selection or synthesis to meet targeted volumetric requirements.
An investigation of prototype development using 3D printer: A digital fabrication approach
Authors: Rana Amit Kumar , Kundu Sanjib , Datta Suchibrata 
Published: October 2024

Abstract
Additive manufacturing (AM) is a widely used technique in several industries for rapid prototyping and layer-by-layer fabrication of a new product. The influence of printer settings and print quality is essential for the performance of products in a variety of applications. The popularity of manufacturing using 3D printing is growing rapidly. In view of this, an investigation is carried out on the 3D printing techniques, their applications, and prototype materials for complex mechanical parts such as an impeller. The present study thoroughly considers the fundamental techniques in 3D printing technology, materials, and recent advancements applied to the current application and accepted trends. The 3D printing technology is advantageous as it accepts a wide range of designs, allows customized manufacturing, minimizes waste, builds intricate structures, and creates prototypes rapidly. Layer height of 0.2 mm, speed of 90 mm/s, and infill density of 80% were determined as the optimal print settings considering time, material cost, and properties. Considering the flexural qualities, the optimized values of layer height, print speed, and infill density were 0.15 mm, 70 mm/s, and 50%, respectively. It was observed that the uniform elongation (UEL) and ultimate stress (UTS) of a component increase as the layer thickness increases for the considered layers.
A Review on Cushioning Characteristics in High-Speed Hydraulic Actuators
Authors: Kanaskar A S , Sapali S.N. , Haribhakta V.K. , Sati SC 
Published: October 2024

Abstract
High speed actuators are an integral part of the fluid power driven systems and cylinder cushioning requirement in these actuators is one of the important aspects. Cushioning is imperative in any high-speed actuator as it not only increases its life but also gives operating comfort to the operator. Fluid power driven systems are very common in many defence and industrial applications due to their high force/torque and power density. This review paper brings out the available literature in the field of hydraulic cylinder cushioning. Literature, consisting mainly of journal articles, research papers and other media contents is analysed for the key parameters of research in this field. The classification of cushioning methodology by different researchers is projected. The methodologies of modelling and simulation work carried out by various authors are analysed. Thereafter the optimization studies done for the cushion piston design in various literature are discussed. Lastly, experimental validation strategies as employed in certain papers are also brought out. Experimental study, and validation of non-conventional cushioning methodology is discussed, which is not much evidenced in the literature.
Properties and Characterization of Nanocellulose
Authors: Mishra Upasana , Neeraj  
Published: October 2024

Abstract
In the field of nanotechnology, nanocellulose plays crucial role. Some features of nanocellulose like high surface area, crystallinity, porosity and tensile stress makes remarkable changes in medical and Industrial area. It is known for its biocompatibility, renewability, high aspect ratio, infinitesimal toxicity and sustainability. Nanocellulose can be prepared by microcrystalline cellulose. For the synthesis of nanocellulose, Acid hydrolysis procedure was used. Various methods of characterizations were used for the prepared nanocellulose such as “Fourier transforms infrared spectroscopy (FT-IR), Scanning Electron Microscopy (SEM) and X-ray diffraction”. Nanocellulose drew the attention of scientists for their biochemical properties due to its physical and chemical structure. Various applications of nanocellulose in different field such as biochemical, waste water management, electronics, packaging, automotive etc.
Optical parameters of PANI.CSA/PMMA nanofibers
Authors: Fadhil Wasan Adeeb , Essa Hanaa K , Rasheed Hiba S , Alwan Tariq J 
Published: October 2024

Abstract
Polyaniline doped with camphor sulphonic/Poly(methyl methacrylate) PANI.CSA/PMMA nanofibers were manufactured by electrospinning technology, where all parameters of the electrospinning system are fixed and the effect of the needle gauge on the properties of the prepared nanofibers is studied at different needle gauge (18, 20, 23 G). The polyaniline was manufactured by aniline-chemical oxidation polymerization. The nanofibers were diagnosed by an FE-SEM scanner to identify the surface morphology of the samples and the diameters of the nanofibers, it shows that nanofibers become more regular and their diameters become smaller as the diameter of the needle decreases. The samples were measured by the analysis of UV-visible spectroscopy, identifying the optical properties of the nanofibers and calculating the energy gap, which was valued ranging from 2.8 eV to 3.2 eV, increased due to the phenomenon of the quantitative restriction. Absorption coefficient and optical constants were also studied as a function of needle gauge.