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  • Open Access

    PROCEEDINGS

    Deformation Behaviour and Strengthening Mechanism of High-Entropy Alloys Using Model and Simulation

    Jia Li1, Yang Chen1, Baobin Xie1, Weizheng Lu1, Qihong Fang1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.25, No.3, pp. 1-2, 2023, DOI:10.32604/icces.2023.010064

    Abstract The high-profile high-entropy alloy shows outstanding mechanical properties. However, the accurate and reasonable models for describing the mechanical behavior of HEAs are still scarce due to their distinctive characteristics such as serious lattice distortion, which limit the engineering application. We have developed a new general framework combining atomic simulation, discrete dislocation dynamics and crystal plasticity finite element method, to study the deformation behaviour and strengthening mechanism of HEAs, and realized the influence of complex cross-scale factors on material deformation [1-3]. Compared with the classic crystal plasticity finite element, the bottom-up hierarchical multiscale model could couple… More >

  • Open Access

    PROCEEDINGS

    Mechanism of Strain Hardening Of Magnesium Single-Crystals: Discrete Dislocation Dynamics Simulations

    Mao Li1, Xiaobao Tian1, Wentao Jiang1, Qingyuan Wang1, Haidong Fan1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.25, No.2, pp. 1-1, 2023, DOI:10.32604/icces.2023.09981

    Abstract Poor ductility heavily limits the industrial application of magnesium (Mg) alloys, and pyramidal dislocations are an important deformation mode for ductility enhancement. In this work, discrete dislocation dynamics (DDD) simulations were performed to study the mechanical behavior and dislocation evolution of Mg singlecrystals compressed along c-axis. Especially, basal-transition and cross-slip algorithms of pyramidal dislocations were proposed and introduced in the DDD method. Simulation results show that basaltransition is an important mechanism for the strong strain hardening observed during c-axis compression of Mg single-crystals. Since the basal-transition events are thermally activated, increasing temperature leads to a More >

  • Open Access

    PROCEEDINGS

    Measuring the Tensile Strength Degradations of Mineral Grain Interfaces (MGIs) in the Granite After Thermo-hydro-mechanical (THM) Coupling

    Mengyi Li1, Zhijun Wu1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.25, No.1, pp. 1-2, 2023, DOI:10.32604/icces.2023.09829

    Abstract Buried in depth for decades of years, granite in the deep geological repository will be subjected to extremely complex effects of thermo-hydro-mechanical (THM) treatment, and the tensile strengths of mineral grain interfaces (MGIs) are inevitably impacted by the THM treatment [1, 2]. Originated by the failure modes of granite after THM treatment, the tensile strength of MGI plays an important role in determining the macro mechanical properties of THM-treated granite [3, 4]. However, the accurate characterization of the tensile strength degradations of MGIs with THM treatment is still lacking. In this study, the varied tensile… More >

  • Open Access

    ARTICLE

    Optical and Mechanical Properties of Ramie Fiber/Epoxy Resin Transparent Composites

    Chunhua Liu1, Dongfang Zou1, Qinqin Huang1, Shang Li2, Xia Zheng1, Xingong Li1,*

    Journal of Renewable Materials, Vol.11, No.10, pp. 3613-3624, 2023, DOI:10.32604/jrm.2023.028111

    Abstract The residual resources of ramie fiber-based textile products were used as raw materials. Ramie fiber felt (RF) was modified by NaClO2 aqueous solution and then impregnated with water-based epoxy resin (WER). RF/WER transparent composite materials were prepared by lamination hot pressing process. The composite materials’color difference, transmittance, haze, density, water absorption, and mechanical properties were determined to assess the effects of NaClO2 treatment and the number of ramie fiber layers on the properties of the prepared composites. The results showed significantly improved optical and mechanical properties of the RF/WER transparent composites after NaClO2 treatment. With the increase More > Graphic Abstract

    Optical and Mechanical Properties of Ramie Fiber/Epoxy Resin Transparent Composites

  • Open Access

    ARTICLE

    Experimental Study on the Compressive Strength of Concrete with Different Wheat Straw Treatment Techniques

    Liang Wen1,2,*, Changhong Yan3, Yehui Shi4, Zhenxiang Wang4, Gang Liu4, Wei Shi4

    Journal of Renewable Materials, Vol.11, No.10, pp. 3681-3692, 2023, DOI:10.32604/jrm.2023.027671

    Abstract The treatment of wheat straw is very difficult, and its utilization rate is very low; accumulation causes air pollution and even fire. To make full use of wheat straw resources, we examined how using different physical and chemical methods to treat the wheat straw which can improve its strength abilities, or enhance the activity of wheat straw ash. In terms of concrete additives, it can reduce the amount of cement used. In this paper, we found that alkali treatment can significantly improve the tensile strength of wheat straw fiber, but polyvinyl alcohol treatment has no… More > Graphic Abstract

    Experimental Study on the Compressive Strength of Concrete with Different Wheat Straw Treatment Techniques

  • Open Access

    ARTICLE

    Optimization of Mortar Compressive Strength Prepared with Waste Glass Aggregate and Coir Fiber Addition Using Response Surface Methodology

    Cut Rahmawati1,2,*, Lia Handayani3, Muhtadin4, Muhammad Faisal4, Muhammad Zardi1, S. M. Sapuan5, Agung Efriyo Hadi6, Jawad Ahmad7, Haytham F. Isleem8

    Journal of Renewable Materials, Vol.11, No.10, pp. 3751-3767, 2023, DOI:10.32604/jrm.2023.028987

    Abstract Waste Glass (WGs) and Coir Fiber (CF) are not widely utilized, even though their silica and cellulose content can be used to create construction materials. This study aimed to optimize mortar compressive strength using Response Surface Methodology (RSM). The Central Composite Design (CCD) was applied to determine the optimization of WGs and CF addition to the mortar compressive strength. Compressive strength and microstructure testing with Scanning Electron Microscope (SEM), Fourier-transform Infrared Spectroscopy (FT-IR), and X-Ray Diffraction (XRD) were conducted to specify the mechanical ability and bonding between the matrix, CF, and WGs. The results showed… More > Graphic Abstract

    Optimization of Mortar Compressive Strength Prepared with Waste Glass Aggregate and Coir Fiber Addition Using Response Surface Methodology

  • Open Access

    ARTICLE

    Strain-Rate Dependency of a Unidirectional Filament Wound Composite under Compression

    Stepan Konev1, Victor A. Eremeyev2,3, Hamid M. Sedighi4,5,*, Leonid Igumnov2, Anatoly Bragov2, Aleksandr Konstantinov2, Ayaulym Kuanyshova1, Ivan Sergeichev1

    CMES-Computer Modeling in Engineering & Sciences, Vol.137, No.3, pp. 2149-2161, 2023, DOI:10.32604/cmes.2023.028179

    Abstract This article presents the results of experimental studies concerning the dynamic deformation and failure of a unidirectional carbon fiber reinforced plastic (T700/LY113) under compression. The test samples were manufactured through the filament winding of flat plates. To establish the strain rate dependencies of the strength and elastic modulus of the material, dynamic tests were carried out using a drop tower, the Split Hopkinson Pressure Bar method, and standard static tests. The samples were loaded both along and perpendicular to the direction of the reinforcing fiber. The applicability of the obtained samples for static and dynamic… More >

  • Open Access

    ARTICLE

    Verification of Depth Adjustment Factor in Eurocode 5 for Tropical Hardwood Timbers

    Adnie Baharin1, Muhammad Amirul Akmal Rosli1, Norshariza Mohamad Bhkari1,2, Lum Wei Chen2, Anis Azmi1, Muhammad Shaiful Nordin3, Zakiah Ahmad1,*

    Journal of Renewable Materials, Vol.11, No.9, pp. 3533-3546, 2023, DOI:10.32604/jrm.2023.028675

    Abstract The depth adjustment factor for bending strength stated in Eurocode 5 (EC5) is only applicable to timbers having a characteristic density below 700 kg/m3 . However, most Malaysian timbers are hardwood, some with a characteristic density reaching above 700 kg/m3 . Therefore, the objective of this study was to examine whether the depth adjustment factor stipulated in EC5 is valid for Malaysian hardwood timbers. Six timber species were selected for this study, namely Kapur (Dryobalanops C.F.Gaertn.), Kempas (Koompassia Maingay ex Benth.), Keruing (Dipterocarpus C.F.Gaertn.), Light red meranti (Shorea Roxb. ex C.F.Gaertn.), Geronggang (Cratoxylum Blume) and Balau (Shorea Roxb. ex C.F.Gaertn.).… More > Graphic Abstract

    Verification of Depth Adjustment Factor in Eurocode 5 for Tropical Hardwood Timbers

  • Open Access

    ARTICLE

    Curing Process of Phenol Formaldehyde Resin for Plywood under Vacuum Conditions

    Guobing Xiong1, Lu Hong2, Zehui Ju3, Xiaoning Lu3,*, Juwan Jin3,*

    Journal of Renewable Materials, Vol.11, No.9, pp. 3447-3461, 2023, DOI:10.32604/jrm.2023.027430

    Abstract The study characterized the curing behaviors of phenol formaldehyde (PF) resin under different vacuum degrees and explored the properties of 9-ply plywood panels hot-pressed under both vacuum and atmospheric conditions. The changes in core temperature and moisture content of the plywood mats during hot pressing were investigated as well. It was found that the gel times and gel temperatures of PF resin decreased with the increase of vacuum degree using a self-made device. FTIR spectra indicated the degree of polycondensation of hydroxymethyl gradually increased with the increase in temperature. It was also observed that a… More >

  • Open Access

    ARTICLE

    Development of Wet Shotcrete with Solid Waste as Aggregate: Strength Optimization and Mix Proportion Design

    Yafei Hu1,2, Keqing Li1,2, Bo Zhang1,2, Bin Han1,2,*

    Journal of Renewable Materials, Vol.11, No.9, pp. 3463-3484, 2023, DOI:10.32604/jrm.2023.027532

    Abstract The super-fine particle size of tailings is its drawback as a recycled resource, which is reflected in the low strength of the new construction and industrial materials formed when it is mixed with cement and other cementitious materials. Therefore, it is crucial to study the effect of tailings particle size and cementitious material on the strength of tailings wet shotcrete (TWSC) and to investigate the optimal mix proportion. In this paper, a multivariate nonlinear response model was constructed by conducting central composite experiments to investigate the effect of different factors on the strength of TWSC.… More >

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