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Research on back analysis of meso-parameters of hydraulic cemented sand and gravel based on Box-Behnken design response surface Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Lixia Guo,Yuhang Guo,Ling Zhong,Jiantao Zhu
Abstract Cemented sand and gravel (CSG) is a new type of dam-building material. Aiming at the cumbersome process and long calculation time of traditional methods to invert the meso-parameters, a mesophase parameter inversion method based on Box-Behnken Design response surface was proposed. By constructing a response surface simulation test scheme with different inversion parameters (elastic modulus
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A new EPS beads strengthening technology and its influences on axial compressive properties of concrete Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Yuan Ji,Wang Linbing,Li Weilong,Yang Hailu,Wang Jianjun,Zhang Wenhua,Xiong Zhenzhen
Abstract In this article, a new technology of surface wrapping and strengthening of expandable polystyrene (EPS) beads is proposed. Three wrapping materials including magnesium phosphate cement (MPC), ultra-high performance concrete (UHPC), and water-borne polyurethane (WPU) were evaluated. Four groups of uniaxial compression tests of EPS concrete specimens were conducted: the failure process and the
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Preparation and characterization of a graphene hybridizing polyurethane damping composite Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Chi Ma,WeiLin Zhang,LianHui Wang,Zhuo Guo,Yan Jiang,Yi Shan,JingYi Chen,Ying Wang,Lee Tin Sin
Abstract A graphene hybridizing polyurethane/polyethyl methacrylate (GR-PU/PEMA) damping composite was synthesized using the sequential interpenetration method. The effects of the graphene content and the microphase separation structure on the damping properties, thermal stability, and mechanical properties have been studied in detail. The dynamic mechanical analysis indicated that graphene could improve
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Use of line laser scanning thermography for the defect detection and evaluation of composite material Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Yin Li,Yuan-jia Song,Zheng-wei Yang,Xing-yu Xie
Abstract The line laser scanning thermography was applied for the defect detection and evaluation of composite material in this work, which was carried out by the following procedures. First, a novel contrast enhancement method by homomorphic technology was proposed and validated by a case study. Then, a specimen containing 12 prefabricated defects was detected using line laser scanning thermography
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A novel superabsorbent material based on soybean straw: Synthesis and characterization Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Jun Guo,Jingsong Huang,Tingguo Liu,Jianbin Chen,Srinivas Janaswamy
Abstract A novel superabsorbent copolymer (SAP) was developed by grafting acrylic acid onto the pretreated soybean straw (PSBS) using gamma-ray irradiation. The structure of soybean straw, treated soybean straw, and SAP were characterized through Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TG), and scanning electron microscopy (SEM). The effect
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Application of melanin as biological functional material in composite film field Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Linlin Liu,Hongyu Xu,Li Gao,Yi Zhao,Haibin Wang,Nan Shi,Lixiao Guo,Panpan Liu
Abstract Melanin comes from a wide range of sources. It can be isolated and characterized from some plants, animals and microorganisms, and can also be simply polymerized by dopamine. It has many biological properties such as antioxidant, ultraviolet shielding and bacteriostasis. Based on the above characteristics, the addition of melanin to film-forming materials can improve the relevant physical
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Influence of hydrothermal aging on the mechanical performance of foam core sandwich panels subjected to low-velocity impact Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Youping Liu,Ye Wu
Abstract The effect of hydrothermal aging on the impact resistance of foam core sandwich panels is studied in this study. The sandwich panels with glass fiber-reinforced skins and polyurethane foam core were fabricated and then were treated with different hydrothermal aging conditions. The moisture absorption characteristic of the composite skins was evaluated. A modified Fickian formulation was proposed
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Analysis of electromagnetic characteristics of the proposed composite four-rail electromagnetic launcher Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Li Tengda,Feng Gang,Liu Shaowei
Abstract In the existing composite four-rail electromagnetic launcher (CFREL), the armature and rail contact surface produces significant heat and bears considerable wear, thereby reducing the potential amount of electromagnetic thrust to be generated. To eliminate the damage caused by the thermal effect of the rail contact surface and to meet the electromagnetic thrust demand of the load, a CFREL
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Hot deformation behavior and microstructure of a 0.5 wt% graphene nanoplatelet reinforced aluminum composite Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Shumei Lou,Xin Li,Guangxin Guo,Lingwei Ran,Yongqiang Liu,Pingping Zhang,Chunjian Su
Abstract Through hot compression experiments at temperatures ranging from 603 to 723 K and strain rates ranging from 0.01 to 10 s−1, the hot deformation behavior of a 0.5 wt% graphene nanoplatelet-reinforced aluminum (0.5 wt% GNP/Al) composite prepared by the powder metallurgy method was studied. The constitutive equations obtained by mathematical models and a neural network were evaluated. The deformation
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Experimental study on surface wrapping strengthening of EPS particles and its concrete performance Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Yuan Ji,Li Weilong,Wang Linbing,Wang Jianjun,Yang Hailu,Zhang Wenhua,Xiong Zhenzhen
Abstract Expanded polystyrene (EPS) concrete is a low-carbon green building material, which has the properties of thermal insulation, but its strength is not high at present. To improve the strength of EPS concrete, EPS particles were wrapped on the surface by magnesium phosphate cement, ultra-high performance concrete, and waterborne polyurethane, they were used to make concrete after aging, and then
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Modification of mechanical properties of Shanghai clayey soil with expanded polystyrene Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Qu Jili,Tao Huan,Qu Weiqing,Han Guoqi,Liu Hongmei,Patanmuhan Abulimiti,Semaierjiang Maimaitiyusupu,Andrian Batugin
Abstract In the present study, the resistance characteristics of Shanghai clayey soil-expanded polystyrene (EPS) mixture have been explored, using unconfined compressive and consolidation and rebound tests. EPS beads were mixed homogenously with clay soil in accordance with different mass ratios of beads to soil, that is, 0, 0.02, and 0.03%. Four particle sizes of EPS were used in the mixtures, that
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Experimental investigations of a novel pressure microfoam preparation device for dust removal Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2022-01-01 Yonghe Li, Qingguo Wang, Lina Tuo, Fasong Zhang, Xiaoyu Zhang
Compared with large size foam, pressure microfoam has the characteristics of a good pipeline transportation stability, good jet orientation, strong impact force, and strong ability to capture fine dust, which is more suitable for dust removal. The traditional foam preparation device has the disadvantages of high-pressure loss, poor foaming effect, and foam uniformity. To overcome the above shortcomings
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Tuning the through-thickness orientation of 1D nanocarbons to enhance the electrical conductivity and ILSS of hierarchical CFRP composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Yonglyu He, Su Ju, Ke Duan, Jun Tang, Shuxin Bai, Dazhi Jiang, Yingying Pei, Jianwei Zhang
In this article, we proposed a novel but simple multilayer resin film infusion-compressive molding (MLRFI-CM) manufacturing process that can harness the resin shear flow to architect hierarchical carbon fiber reinforced polymer (CFRP) composites with tunable 1D nanocarbons orientation. Via this novel process, we demonstrated that the orientation of two typical 1D nanocarbons, namely, the carbon nanotubes
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Oblique penetration mechanism of hybrid composite laminates Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Meng Han, Chuwei Zhou, Vadim V. Silberschmidt, Xindong Ma, Mao Liu, Wenan Jiang, Qinsheng Bi
Hybrid fiber composites are widely used to improve the anti-penetration performance. Carbon/Kevlar hybrid composites are used in aircrafts and safety devices, thanks to the strong toughness of Kevlar fibers and high strength of carbon fibers. In the present work, the contact force of hybrid composites under oblique impact is derived. The viscoelastic constitutive model of Kevlar layer is investigated
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Research on the size effect of roughness on rock uniaxial compressive strength and characteristic strength Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Gaojian Hu, Yu Li, Gang Ma
The joint roughness has an influence on the uniaxial compressive strength (UCS) and characteristic strength of the rock, but the relationship of the influence is yet to be obtained. In this article, the influence of the size of the rock with rough joints on the UCS and the influence of the size effect of roughness on the UCS are studied by establishing 11 sets of numerical simulation schemes, a total
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Environmental effects on mode II fracture toughness of unidirectional E-glass/vinyl ester laminated composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Mazaher Salamt-Talab, Fatemeh Delzendehrooy, Alireza Akhavan-Safar, Mahdi Safari, Hossein Bahrami-Manesh, Lucas Filipe Martins da Silva
In this article, mode II fracture toughness ( G IIc {G}_{\text{IIc}} ) of unidirectional E-glass/vinyl ester composites subjected to sulfuric acid aging is studied at two different temperatures (25 and 90°C). Specimens were manufactured using the hand lay-up method with the [ 0 ] 20 {{[}0]}_{20} stacking sequence. To study the effects of environmental conditions, samples were exposed to 30 wt% sulfuric
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The electrochemical performance and modification mechanism of the corrosion inhibitor on concrete Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Meiyan Hang, Minghui Jiang, Junwei Xu, Teng Cheng, Hao Wang, Gangming Zhou
The purpose of this study was to solve the chloride corrosion damage problems of the rebar in reinforced concrete structures under the chloride environment. The effects of 1.0% triethanolamine (abbreviated as 1.0% TEA), 1.0% Ca(NO 2 ) 2 , and 0.5% TEA + 0.5% Ca(NO 2 ) 2 (abbreviated as 1.0% composite corrosion inhibitor) on the electrochemical performance and modification mechanism of the mortar specimens
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Evaluation of the applicability of different viscoelasticity constitutive models in bamboo scrimber short-term tensile creep property research Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Sun Songsong, Wan Maosong
Bamboo scrimber is a new natural fiber-reinforced composite material in modern industry. In this paper, the tensile creep characteristics of this material were chosen as the object of the study. First, axial tensile fracture experiments were conducted on different test specimens to determine the corresponding strength data. Then six sets of standard tensile creep experiments were conducted under different
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Experimental and microstructure analysis of the penetration resistance of composite structures Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Youchun Zou, Chao Xiong, Junhui Yin
Composite structures (SiC/UHMWPE/TC4; SiC/TC4/UHMWPE) were designed using silicon carbide (SiC)ceramics, ultra-high-molecular-weight polyethylene (UHMWPE) laminate, and titanium alloys (TC4s). Penetration experiments and numerical simulations were carried out to study the anti-penetration mechanism and energy characteristics of the composite structures, and the microstructure of the TC4 was analyzed
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Ultrasensitive analysis of SW-BNNT with an extra attached mass Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 JinRu Zhong
In this article, the ultrasensitive analysis of single-walled boron nitride nanotubes (SW-BNNTs) with an extra attached mass is studied by employing atomistic analysis technique. Numerical examples are carried out for vibration characteristic of SW-BNNT with an extra attached mass. Our results show that the vibration frequencies and magnitudes of SW-BNNT are very sensitive to the extra attached mass
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Active vibration suppression of wind turbine blades integrated with piezoelectric sensors Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Sang-Lae Lee
As the wind turbine size gets larger, the optimal design of blades, which is a major source of energy for the wind turbines and also the cause of loads, is becoming more important than anything else. Therefore, reducing the load on the blade should be the top priority in designing a blade. In this article, we studied the vibration control of the stiffened wind blades subjected to a wind load with piezoelectric
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Delamination properties and in situ damage monitoring of z-pinned carbon fiber/epoxy composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Zhe Che, Han Wang, Shaokai Wang, Yizhuo Gu, Min Li
Carbon-fiber-reinforced composites with layer stacking structures are sensitive to delamination crack. To improve the interlaminar properties and further explore the capability of in situ damage monitoring of the laminate, CCF300 and CCF800 carbon fiber pins were selected to fabricate the z-pinned composites. Compared with the control sample, the G IC values of CCF300 and CCF800 z-pinned composites
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Analysis of the influence of asymmetric geological conditions on stability of high arch dam Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Zelin Ding, Xuanyi Zhu, Hongyang Zhang, Hanlin Ban, Yuan Chen
Geological conditions play a decisive role in the stability of arch dam engineering, and the asymmetric geological conditions of the abutment have a very negative impact on the safety of the arch dam. This article takes Lizhou arch dam as the research object, and determines that the arch dam is preliminarily affected by the geological asymmetric characteristics. Through the geomechanical model test
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Measurement and simulation validation of numerical model parameters of fresh concrete Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Ke Zhang, Wenda Yu, Dong Li, Defang Zou, Shiying Zhang
In the numerical simulation of the macroscopic flow of the concrete, it can optimize the performance indicators of the screw conveyor and improve the uniformity of the material to be discharged in the batch production. The discrete element method is effective. The accuracy of physical parameters of this method is a key issue for the reliability of the simulation results of concrete. In this study,
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Performance improvements of a short glass fiber-reinforced PA66 composite Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Shumei Lou, Hui Zhang, Fang Liu, Jianchao Wang, Wenying Yin, Zhiyuan Chen, Chunjian Su
A plate used in a medium voltage switch, made by a 25 wt% glass fiber-reinforced polyamide 66 composite filled with flame-retardant red phosphorus (RP) (PA66-GF25 FR (RP)), was injection molded. To satisfy the relatively high dimensional accuracy requirement, a “supporting mold” was used to compensate for the difference between the transverse and longitudinal linear shrinkage of the PA66-GF25 FR (RP)
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Investigation on the acoustic properties of structural gradient 316L stainless steel hollow spheres composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Chunhe Wang, Chunhuan Guo, Fengchun Jiang
In this study, a kind of structural gradient metal hollow spheres composites (SG-MHSCs) were fabricated using two kinds of 316L stainless steel hollow spheres with different diameters and A356 aluminum through the casting method. Then the density of the SG-MHSCs was measured by the direct measurement; the microstructure of the SG-MHSCs was characterized by the Scanning Electron Microscope. Meanwhile
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Experimental studies on the dynamic viscoelastic properties of basalt fiber-reinforced asphalt mixtures Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Yongjun Zhang, Wenbo Luo, Xiu Liu
To study the influence of basalt fibers on the viscoelastic mechanical properties of asphalt concrete (AC) mixtures, unconfined compressive dynamic modulus tests were performed on styrene–butadiene–styrene (SBS)-modified AC mixtures reinforced with various contents of basalt fibers ranging from 0.2 to 0.5% by weight at five temperatures and six load frequencies, and the dynamic moduli and phase angles
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Hot deformation behavior of nano-Al2O3-dispersion-strengthened Cu20W composite Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Junchao An, Meng Zhou, Baohong Tian, Yongfeng Geng, Yijie Ban, Shengli Liang
Nano-Al 2 O 3 dispersion-strengthened Cu20W composite was fabricated by vacuum hot-pressing sintering process. The electrical conductivity, relative density, and Brinell hardness were tested, respectively. The gleeble-1500D thermomechanical simulator was used to conduct isothermal compression with strain rates ranging from 0.001 to 10 s −1 and the temperatures ranging from 650 to 950°C. The microstructure
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Synthesize and characterization of conductive nano silver/graphene oxide composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Shasha Li, Xi Liu, Jianjia Qin, Changqing Fang, Nailiang Liu
To meet the high-precision needs of conductive ink in the field of microelectronic circuit printing, nano silver-coated graphene oxide (GO) composites were prepared as the conductive functional unit of the composites. The results show that compatibility of the GO grafted with ethylene glycol diglycidyl ether is better in the organic matrix than in the inorganic solvents. The nano silver particles attached
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Analysis and optimization of mechanical properties of recycled concrete based on aggregate characteristics Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Jiangwei Bian, Wenbing Zhang, Zhenzhong Shen, Song Li, Zhanglan Chen
The most significant difference between recycled and natural concretes lies in aggregates. The performance of recycled coarse aggregates directly affects the characteristics of recycled concrete. Therefore, an in-depth study of aggregate characteristics is of great significance for improving the quality of recycled concrete. Based on the coarse aggregate content, maximum aggregate size, and aggregate
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Synthesis and characterization of polyurethane–polysiloxane block copolymers modified by α,ω-hydroxyalkyl polysiloxanes with methacrylate side chain Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Su Xiaofeng, Yu Yitao, Li Bing, Wang Jing, Lu Chuan, Zong Jianping, Li Jinhui, Wang Feng
In order to prepare polyurethane–polysiloxane block copolymers, α,ω-hydroxyalkyl polysiloxanes with methacrylate side chain and α,ω-bis(2-methyl-3-hydroxypropyl)polymethyl(2-methyl-methylpropanoate) siloxanes, were synthesized and characterized in this study. The syntheses process included hydroxyl protection, hydrosilylation, deprotection, and ring-opening equilibrium reactions. The intermediates
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Buckling analysis of thin-walled metal liner of cylindrical composite overwrapped pressure vessels with depressions after autofrettage processing Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Guo Zhang, Haiyang Zhu, Qi Wang, Xiaowen Zhang, Mingfa Ren, Shunan Xue, Gang Li
The cylindrical filament wound composite overwrapped pressure vessels (COPV) with metal liner has been widely used in spaceflight due to their high strength and low weight. After the autofrettage process, the plastic deformation of the metal liner is constrained by composite winding layers, which introduce depressions to the metal liner that causes local buckling. To predict the local buckling of the
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Use of polypropylene fibres to increase the resistance of reinforcement to chloride corrosion in concretes Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Wioletta Raczkiewicz
Concrete with the addition of polypropylene fibres is more cohesive and has better adhesion, deformability and tightness because the fibres “bind” the concrete matrix together and prevent large pores from forming in the concrete mix and limit the formation and spread of shrinkage cracks. Therefore, it can be assumed that polypropylene fibres affect the effectiveness of the concrete cover as a layer
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Comparative study between dry and wet properties of thermoplastic PA6/PP novel matrix-based carbon fibre composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Aparna Sridhar, Ramesh Babu Adusumalli, Purnima Doddipatla, Karthik Chethan Venkateshan
The aim of the study is to develop and investigate the suitability of thermoplastic composites for underwater applications. PA6/PP/PP- g -MA (70 wt%/30 wt%/3 phr) blend is used as a novel matrix to synthesize UDCF composites with balanced strength and toughness even in humid conditions. This novel matrix has around 60% lower water absorption capacity compared to PA6. Short carbon fibres (SCF) and unidirectional
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Experimental study on the low-velocity impact failure mechanism of foam core sandwich panels with shape memory alloy hybrid face-sheets Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Hao Li, Cong Jiang, Ye Wu, Yonghu Huang, Yun Wan, Ru Chen
Superelastic shape memory alloy (SMA) as an advanced smart material has been used to improve the impact performance of fiber-reinforced composites in recent decades. Due to the low impact toughness of the thin composite face-sheet and the poor strength of the foam core, sandwich panels are sensitive to the transverse loading. SMA fibers were embedded into the composite laminated to improve the impact
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Preparation, optical properties, and thermal stability of polyvinyl butyral composite films containing core (lanthanum hexaboride)–shell (titanium dioxide)-structured nanoparticles Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Hongbo Tang, Jian Zhou, Shengkui Zhong, Yuchang Su, Qunwei Shu, Lihua Xiao
Nano-sized lanthanum hexaboride (LaB 6 )@ titanium dioxide (TiO 2 ) particles with a core–shell structure has been successfully synthesized via a simple sol–gel method. LaB 6 @TiO 2 particles were used as filler in polyvinyl butyral (PVB) matrix and performance of the TiO 2 shell was evaluated. The core–shell nanoparticles were characterized for morphology and structure properties. X-ray diffraction
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Research on the mechanical model of cord-reinforced air spring with winding formation Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Yu-qiang Cheng, Chang-geng Shuai, Hua Gao
In this article, the parametric model for the stiffness characteristic and burst pressure of cord-reinforced air spring with winding formation is developed. Based on the non-geostrophic winding model and the assumption of cord cross-stability, the cord winding trajectory model of the capsule is established. Then, the anisotropic and nonlinear mechanics model of the capsule with complex cord winding
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Experimental study on the influence of mixing time on concrete performance under different mixing modes Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Wu Zhao, Jing Yang, Wenjun Zhao, Chi Yang
To study the influence of different mixing times on the performance of concrete under vibration mixing and conventional mixing, C40 and C60 are selected in this paper to verify the influence of mixing time of 60, 75, 90, 105, and 120 s on the compressive strength and durability of concrete comparing vibration mixing and common forced mixing. The results show that the early strength of concrete is more
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A continuum damage model for fatigue life prediction of 2.5D woven composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Nan Wang, Weidong Wen, Haitao Cui
A new model based on continuum damage mechanics is proposed to predict the fatigue life of 2.5D woven composites. First, a full-cell model reflecting the real microstructure of 2.5D woven composites is established in ANSYS. Subsequently, three independent damage variables are defined in the framework of the composite micromechanics to establish the component constitutive relations associated with damage
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Investigation of the influence of recyclate content on Poisson number of composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Daria Żuk, Norbert Abramczyk, Sebastian Drewing
Composite materials are used in many industries. Their mechanical and physical properties as well as their low weight make them suitable for use in many constructions. Their wide application generates a problem with their disposal. Therefore, it is necessary to design new materials based on waste from polyester–glass laminates in order to introduce a closed circuit in the composite production process
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A hard-core soft-shell model for vibration condition of fresh concrete based on low water-cement ratio concrete Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Xiaotian Li, Guangnian Xie, Zhurui Gao, Chuxin Wang
The newly developed vibration-compacting modular production technology of concrete with low water-cement ratio puts forward new requirements for the study of rheological mechanical model of concrete. The existing contact model of discrete element method cannot effectively express the complex dynamic relationship between concrete aggregate and mortar under vibration. In this article, an improved hard-core
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Influence of class F fly ash and silica nano-micro powder on water permeability and thermal properties of high performance cementitious composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Mostafa Jalal
Article Influence of class F fly ash and silica nano-micro powder on water permeability and thermal properties of high performance cementitious composites was published on January 1, 2021 in the journal Science and Engineering of Composite Materials (volume 28, issue 1).
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Effects of fly ash and cement content on rheological, mechanical, and transport properties of high-performance self-compacting concrete Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Mostafa Jalal, Esmaeel Mansouri
Article Effects of fly ash and cement content on rheological, mechanical, and transport properties of high-performance self-compacting concrete was published on January 1, 2021 in the journal Science and Engineering of Composite Materials (volume 28, issue 1).
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Effect and mechanism of different excitation modes on the activities of the recycled brick micropowder Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Chengfang Yuan, Di Wang, Haris Setiawan, Yiran Wei
The recycled brick micropowder was formed after crushing and ball milling and waste clay bricks have great potential activity. It can replace some percentage of cement in the preparation of concrete through activation effects of excitation, and thus, reutilization of waste products is the objective of this study. This study analyzed the activation effects of mechanical excitation, chemical excitation
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Material-removing machining wastes as a filler of a polymer concrete (industrial chips as a filler of a polymer concrete) Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Norbert Kępczak, Radosław Rosik, Mariusz Urbaniak
The paper presents an impact of the addition of industrial machining chips on the mechanical properties of polymer concrete. As an additional filler, six types of industrial waste machining chips were used: steel fine chips, steel medium chips, steel thick chips, aluminium fine chips, aluminium medium chips, and titanium fine chips. During the research, the influence of the addition of chips on the
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Experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Jules Assih, Ivelina Ivanova
This paper presents a new approach to strengthen reinforced concrete structures using natural fiber composites. Natural fibers are often used in civil engineering for thermal or acoustic insulation, but rarely are they employed to strengthen structures. Natural fiber composites are constituted of a matrix based on epoxy adhesive and aligned continuous fiber reinforcements. In this study, we investigate
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3D printing path planning algorithm for thin walled and complex devices Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Min Yang, Menggang Lai, Shengjun Liu
With the popularity of stereo printing technology, 3D printers are widely used in industry, manufacturing, medicine, and other industries to quickly manufacture small devices. Before 3D printing, it is necessary to plan the printing path. Unreasonable printing path will not only increase the time consumption of printing products, but also cause printing failure due to the accumulation of stress and
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Handcrafted digital light processing apparatus for additively manufacturing oral-prosthesis targeted nano-ceramic resin composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Lu Yao, Peixin Hu, Yiyi Zhao, Qi Tao Lue, Zilin Nie, Ming Yan, Zhengdi He
3D-printing finds increasing applications including the dental implant. We report in this study a nicely printed and then cured composite consisting of nano-ceramic and photosensitive resin, targeting oral prosthesis application. The results show that the 3D-printed material has good geometry accuracy and satisfactory hardness, justifying its potential as an advanced manufacturing methodology for future
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Inverse analysis of concrete meso-constitutive model parameters considering aggregate size effect Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Lixia Guo, Song Li, Ling Zhong, Lei Guo, Lunyan Wang
Article Inverse analysis of concrete meso-constitutive model parameters considering aggregate size effect was published on January 1, 2021 in the journal Science and Engineering of Composite Materials (volume 28, issue 1).
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Mechanical and fracture properties of steel fiber-reinforced geopolymer concrete Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Peng Zhang, Jia Wang, Qingfu Li, Jinyi Wan, Yifeng Ling
In this study, the effects of steel fibers on the mechanical properties of the geopolymer concrete – compressive, splitting tensile, and flexural strength; compressive elastic modulus; and fracture properties – were evaluated. Milling steel fibers were incorporated into the geopolymer concrete, and the volume fraction of the steel fibers was varied from 0 to 2.5%. Fly ash and metakaolin were chosen
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Evaluation of carbon fiber reinforced polymer – CFRP – machining by applying industrial robots Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Ever Grisol de Melo, Jéssica Christina dos Santos Silva, Tiago Borsoi Klein, Julian Polte, Eckart Uhlmann, Jefferson de Oliveira Gomes
Carbon fiber reinforced polymer (CFRP) is widely used in high-tech industries because of its interesting characteristics and properties. This material presents good strength and stiffness, relatively low density, high damping ability, good dimensional stability, and good corrosion resistance. However, the machinability of composite materials is complex because of the matrix/fiber interface, being a
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Influence of fiber type on mechanical properties of lightweight cement-based composites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Wenhua Chen, Xiaohua Ji, Zhiyi Huang
This article discusses the influence of fiber types, including polyvinyl alcohol (PVA) fiber, polyethylene (PE) fiber, and steel fiber (SF), on the compressive strength, flexural strength, bending toughness, and tensile ductility of lightweight cement-based composites. The fiber dispersion and the microscopic morphology were assessed using fluorescence and scanning electron microscopes. The result
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Optimization for drilling process of metal-composite aeronautical structures Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Cristiano Devitte, Gabriel S. C. Souza, André J. Souza, Volnei Tita
Metal-composite laminates and joints are applied in aircraft manufacturing and maintenance (repairing) using aluminum alloys (AA) and glass fiber-reinforced polymer (GFRP). In these applications, drilling has a prominent place due to its vast application in aeronautical structures’ mechanical joints. Thus, this study presents the influence of uncoated carbide drills (85C, 86C, H10N), cutting speeds
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Engineering of composite materials made of epoxy resins modified with recycled fine aggregate Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Kamil Krzywiński, Łukasz Sadowski, Magdalena Piechówka-Mielnik
The paper presents studies performed on polymer-cementitious composite made of epoxy resin coating modified with aggregate and cementitious substrate. Epoxy resin is a perfect material that can be used to protect cementitious materials. According to its manufacturer, it can be mixed with fine aggregate. Coarse aggregate made of building demolition wastes is mostly utilized in concrete mixtures or road
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Comparison of the shear behavior in graphite-epoxy composites evaluated by means of biaxial test and off-axis tension test Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Juan Carlos Marín, Alberto Barroso
Characterization of shear behavior in composite materials remains a not fully solved problem. In the last fifty years, many different approaches have been proposed to solve this problem (rail shear, thin-walled tube torsion, off-axis tensile, ±45° tensile, Arcan, Iosipescu, asymmetric four-point bend, plate twist, v-notched rail shear, off-axis flexural, and shear frame), although none of these approaches
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Photosynthetic textile biocomposites: Using laboratory testing and digital fabrication to develop flexible living building materials Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Assia Stefanova, Pichaya In-na, Gary Stephen Caldwell, Ben Bridgens, Rachel Armstrong
Urban development and the construction industry account for a considerable proportion of global carbon dioxide (CO 2 ) emissions. Emerging biological materials, such as those proposed in this paper, seek to utilize the metabolic functions of living microorganisms to reduce some of the negative impacts of humans on the environment. The material explorations demonstrated in this paper propose a living
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Study of gypsum composites with fine solid aggregates at elevated temperatures Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Magdaléna Doleželová, Lenka Scheinherrová, Alena Vimmrová
The structure and behaviour of two gypsum composites after exposition to elevated temperatures were investigated. The silica sand and fine basalt aggregate were used as solid fillers. The changes in structure and composition at temperatures from 50 to 1,000°C were investigated by scanning electron microscopy and X-ray diffraction together with the size and strength of the samples and their pore size
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Photoluminescence characteristics and energy transfer phenomena in Ce3+-doped YVO4 single crystal Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Shuai Wang, Pengfei Wang, Yongfeng Ruan, Youfa Wang, Shouchao Zhang
The undoped YVO 4 and Ce 3+ -doped YVO 4 single crystals have been successfully grown by the Czochralski method in a medium frequency induction furnace. The X-ray diffraction patterns testified that all samples exhibited the pure tetragonal YVO 4 crystalline phase without any parasitic phases. The optical properties of Ce 3+ -doped YVO 4 single crystals with different doping concentrations were investigated
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Thermal and mechanical characteristics of cement nanocomposites Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Mostaf Jalal, Esmeel Mansouri
Article Thermal and mechanical characteristics of cement nanocomposites was published on January 1, 2021 in the journal Science and Engineering of Composite Materials (volume 28, issue 1).
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Experimental research on effect of opening configuration and reinforcement method on buckling and strength analyses of spar web made of composite material Sci. Eng. Compos. Mater. (IF 1.9) Pub Date : 2021-01-01 Lin Sen, Li Chenxi, Hu Ying, Cong Hao
This study experimentally investigates the effect of the opening configuration on the buckling stability and bearing performance of a structural beam web used in a commercial aircraft made of composite materials. The buckling and strength analyses on three opening configurations (circular, oblong, and rhombic) were carried out using test samples with identical web surface size. It is found that the