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  • Open Access

    ARTICLE

    Conditional Generative Adversarial Network Enabled Localized Stress Recovery of Periodic Composites

    Chengkan Xu1,2,4, Xiaofei Wang3, Yixuan Li2, Guannan Wang2,*, He Zhang2,4,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.140, No.1, pp. 957-974, 2024, DOI:10.32604/cmes.2024.047327

    Abstract Structural damage in heterogeneous materials typically originates from microstructures where stress concentration occurs. Therefore, evaluating the magnitude and location of localized stress distributions within microstructures under external loading is crucial. Repeating unit cells (RUCs) are commonly used to represent microstructural details and homogenize the effective response of composites. This work develops a machine learning-based micromechanics tool to accurately predict the stress distributions of extracted RUCs. The locally exact homogenization theory efficiently generates the microstructural stresses of RUCs with a wide range of parameters, including volume fraction, fiber/matrix property ratio, fiber shapes, and loading direction. Subsequently, More > Graphic Abstract

    Conditional Generative Adversarial Network Enabled Localized Stress Recovery of Periodic Composites

  • Open Access

    REVIEW

    Sustainable Biocomposites Materials for Automotive Brake Pad Application: An Overview

    Joseph O. Dirisu1,*, Imhade P. Okokpujie2,3,*, Olufunmilayo O. Joseph1, Sunday O. Oyedepo1, Oluwasegun Falodun4, Lagouge K. Tartibu3, Firdaussi D. Shehu1

    Journal of Renewable Materials, Vol.12, No.3, pp. 485-511, 2024, DOI:10.32604/jrm.2024.045188

    Abstract Research into converting waste into viable eco-friendly products has gained global concern. Using natural fibres and pulverized metallic waste becomes necessary to reduce noxious environmental emissions due to indiscriminately occupying the land. This study reviews the literature in the broad area of green composites in search of materials that can be used in automotive brake pads. Materials made by biocomposite, rather than fossil fuels, will be favoured. A database containing the tribo-mechanical performance of numerous potential components for the future green composite was established using the technical details of bio-polymers and natural reinforcements. The development… More > Graphic Abstract

    Sustainable Biocomposites Materials for Automotive Brake Pad Application: An Overview

  • Open Access

    ARTICLE

    Mechanical and Biological Properties of Chitosan Nanocomposite Films: Effects of POSS nanoparticles

    R. VENKATESAN*, S. R. DARSON IMMANUEL JOHN, N. RAJESWARI

    Journal of Polymer Materials, Vol.36, No.3, pp. 261-273, 2019, DOI:10.32381/JPM.2019.36.03.6

    Abstract Nanocomposite films of chitosan (CH) incorporated with different wt. % of the polyoligomericsilsesquioxane (POSS) were prepared by solution casting. The thermal, mechanical, morphological and antimicrobial properties of the nanocomposites were examined. TGA analyses of the nanocomposites indicate that the filler enables the enhancement of thermal stability of chitosan. The tensile strength of the nanocomposite films is enhanced (10.9 MPa for neat chitosan to 24.0MPa for 5wt. % filled chitosan) by the addition of POSS while the elongation at break is reduced. The nanocomposite films exhibited excellent antimicrobial activity against both gram positive and gram negative More >

  • Open Access

    ARTICLE

    VOC Sensing Studies on Electrically Conductive Polyaniline@MoS2 Nanocomposites

    RUBY AHMED1, MOHAMMAD OMAISH ANSARI2, FARMAN ALI1, SHAHID PERVEZ ANSARI1,*

    Journal of Polymer Materials, Vol.36, No.3, pp. 243-251, 2019, DOI:10.32381/JPM.2019.36.03.4

    Abstract Polyaniline (PANI) and molybdenum disulphide (MoS2 ) were used to prepare nanocomposites by in-situ oxidative polymerization of acidified aniline in presence of dispersed MoS2 in the reaction mixture. Electron Microscopy (SEM & TEM), Fourier Transform Infrared (FTIR) spectroscopy, Ultraviolet-Visible (UV-Vis) spectroscopy, and X-ray diffraction (XRD) were used to characterize these nanocomposites. SEM micrographs showed that PANI is present on the layers of MoS2 which were exfoliated during the preparation and the presence of MoS2 is also confirmed by XRD peaks. The nanocomposites were studied for their electrical conductivity and stability of electrical conductivity in terms of d.c. More >

  • Open Access

    ARTICLE

    Influence of Poly (vinyl butyral) Modification on the Mechanical and Thermal Properties of Kevlar Fiber Reinforced Novolac epoxy/multiwalled carbon nanotube nanocomposites

    KAVITA*, R.K. TIWARI

    Journal of Polymer Materials, Vol.36, No.2, pp. 195-205, 2019, DOI:10.32381/JPM.2019.36.02.7

    Abstract The effect of poly (vinyl butyral) and acid functionalized multiwalled carbon nanotubes (f-MWCNT) on the thermal and mechanical performance of Kevlar fiber reinforced novolac epoxy nanocomposites was investigated and presented in this paper. Nanocomposite containing 1.5 wt. % poly (vinyl butyral) and 0.5 wt. % f-MWCNT exhibited best thermal and mechanical properties (except flexural strength) among all the nanocomposites reported here. It showed ~5%, 27% and 126 % improvement in tensile strength, young’s modulus and impact strength respectively as compared to the neat novolac epoxy Kevlar composite.Nanocomposite containing 0.5 wt. % f- MWCNT and 2 More >

  • Open Access

    ARTICLE

    Microwave–Induced Thermo-Responsive Shape Memory Polyurethane/MWCNTs Composites and Improved their Shape Memory and Mechanical Properties

    KRISHAN KUMAR PATEL, RAJESH PUROHIT

    Journal of Polymer Materials, Vol.36, No.1, pp. 23-37, 2019, DOI:10.32381/JPM.2019.36.01.3

    Abstract Microwave (MV)-induced thermo-responsive shape memory thermoplastic polyurethane (SMTPU)/ MWCNT composites were prepared in micro-compounder. Composites containing different amount of multiwall Carbon nanotube (MWCNT) varying from 0 to 1.5 phr in SMTPU matrix were prepared. Maximum stretching strength, recovery force and tensile strength for 1.5 CNTPU (1.5 phr MWCNT in SMTPU matrix) was increased by 120%, 100% and 24% respectively as compared to SMTPU. MV-induced shape memory is a novel approach for fast, clean and remote heating during operation. MWCNT is strong absorber of microwave irradiation so that SMTPU/ MWCNTs nanocomposites successfully triggered by microwave. More >

  • Open Access

    ARTICLE

    Synthesis of Novel Nanocomposite Based on Carboxymethylcellulose (CMC), Kaolin and Urea Fertilizer for Controlled Release

    NALINI SHARMA1,*, AJAY SINGH2, RAJ KUMAR DUTTA3

    Journal of Polymer Materials, Vol.37, No.1-2, pp. 1-15, 2020, DOI:10.32381/JPM.2020.37.1-2.1

    Abstract Controlled Release fertilizers (CRFs) are new generation agrochemicals which aid in decreasing environmental pollution. In the present study, novel CRF beads are synthesized by the technique of sol-gel polymerization. CMC polymer at various concentrations was used as a matrix and kaolin was used as a binder to enhance mechanical properties of the beads. The study also reveals the incorporation of Kaolin at different concentrations and optimization of the same. Fe3+ was used as a cross-linker to obtain spherical beads. Also, a study was done to optimize the cross linking time and concentration of cross linking… More >

  • Open Access

    ARTICLE

    Nanotitanium Dioxide Reinforced High Performance PEI/Silicone Rubber Composites: Mechanical, Thermal and Morphological Characteristics

    R.M. MISHRAA, R. VIJAYVARGIYAA, K.N. PANDEYA, J.S.P. RAIB

    Journal of Polymer Materials, Vol.37, No.3-4, pp. 179-188, 2020, DOI:10.32381/JPM.2020.37.3-4.5

    Abstract The present investigation is targeted to prepare nanocomposites based on binary blends of polyetherimide (PEI)-silicone rubber incorporated with varied loadings of nanotitanium dioxide particles. Nanocomposites have been prepared by melt blending process using twin screw extruder. Thermal properties of the developed nanocomposites have been investigated with the help of thermogravimetric analyzer (TGA) and dynamic mechanical analyzer (DMA). Scanning electron microscopy (SEM) is used to analyze the morphological properties of the nanocomposites. Mechanical properties (tensile strength, tensile modulus, elongation at break, impact strength) of the nanocomposites have been evaluated by universal testing machine (UTM). Mechanical testing… More >

  • Open Access

    ARTICLE

    Synergistic Effect of Nano-α-Al2O3 Particles on Mechanical Properties of Glass-fibre reinforced Epoxy Hybrid Composites

    ANIL KUMAR VEERAPANENI1, CHANDRASEKAR KUPPAN2,*, MURTHY CHAVALI3,*

    Journal of Polymer Materials, Vol.37, No.3-4, pp. 121-130, 2020, DOI:10.32381/JPM.2020.37.3-4.1

    Abstract The mechanical properties of hybrid nanocomposites made of epoxy/glass fibre dispersed with nano-α-Al2 O3 powder at different weight percentages were studied.The effect of nano-α- Al2O3 size and wt% on mechanical properties like tensile, flexural, interlaminar shear stress and hardness enhanced because of their higher surface area and interfacial polymer-metal interaction. The nanoparticle embedded laminates have shown improvement in flexural strength,and hardness when compared to laminate without nano-α-Al2 O3. The properties varied with the loading and size of the nanoparticles. The tensile strength was highest for 0.5 wt% of 200nm nano-α-Al2O3, which is 167.80 N/m2.The highest flexural strength was observed More >

  • Open Access

    ARTICLE

    Structural, Thermal, Optical, Mechanical and Morphological Properties of ABS/RGO with DBDPE Nanocomposites

    İBRAHIM KARTERIa,b,*, MUSTAFA ÖZYEŞILDAĞb

    Journal of Polymer Materials, Vol.38, No.1-2, pp. 167-177, 2021, DOI:10.32381/JPM.2021.38.1-2.13

    Abstract This study aims to provide a comprehensive account of chemically reduced graphene oxide (RGO) and decabromodiphenyl ethane (DBDPE) filled acrylonitrile-butadiene-styrene (ABS) multifunctional filaments for fused deposition modeling (FDM) applications. ABS/RGO with DBDPE nanocomposites (ABS-GDM) were fabricated by single-screw extrusion at a diameter of 1.75 mm. The proportion of RGO and DBDPE for the ABS-GDM filaments was set to 0.75 wt%. The properties of the ABS-GDM were determined using optical, mechanical, thermal, and morphological characteristics (using scanning electron microscopy). A three-dimensional (3D) model was successfully printed using the developed ABS-GDM filaments for FDM 3D printing. These More >

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