Porous material

In this paper, the free vibration of a bi-directional functionally graded (2D-FG) nanobeams is investigated by the finite element method. Nanobeams are made of two kinds of porous materials. The material properties of 2D-FG nanobeams are assumed to vary in both axial and thickness directions according to a power law . Based on Eringen's nonlocal elasticity theory, the governing equations of motion are derived.

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The influence of porosity distribution pattern on the nonlinear buckling and postbuckling behavior of porous cylindrical shells subjected to axial compression are investigated by the analytical approach in this paper. The material properties are assumed to vary through the thickness of the shell. There are three porosity distribution pattern types are considered.

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The authors propose a novel BCMO-DNN algorithm for vibration optimization of functionally graded porous microplates. The theory is based on a unified framework of higher-order shear deformation theory and modified strain gradient theory. A hybrid combination of deep learning neural network and balancing composite motion optimization is developed to solve the optimization problems and predict stochastic vibration behaviors of functionally graded porous microplates with uncertainties of material properties.

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This work focuses on the free vibration of the functionally graded porous (FGP) sandwich microplates using the isogeometric approach (IGA). The FGP sandwich plate comprises the homogeneous core and the FG porous face sheets. The material properties of the FGP face sheets are supposed to vary through the thickness direction according to the power-law function and modified rule of a mixture of the volume fraction with three different types of porosity distribution: homogeneous porous, X porous and V porous distributions.

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The article "Static behavior of FGP half-annular nanoplates resting on elastic foundation using nonlocal elasticity theory" presents an algorithm finite element for static bending analysis of the functionally graded porous (FGP) half-annular nanoplate resting on the elastic foundation (EF) using nonlocal elasticity theory. The FGP materials with two-parameter are the volume fraction index (k) and the porosity volume fraction (5) in two cases of even and uneven porosity. The EF includes Winkler-stiffness (k₁) and Pasternak- stiffness (k₂).

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The paper "Nonlinear vibration of functionally graded porous micro-beams resting on elastic foundation" presents the analysis of nonlinear vibration of functionally graded porous (FGP) micro-beams resting on an elastic foundation. The Euler-Bernoulli beam theory (EBT) and the nonlocal strain gradient theory (NSGT) are considered to establish the equations of motion of the micro-beam. The material properties of the micro-beam are assumed to be changed continuously along thickness direction according to simple power-law distribution.

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In the paper "Thermal buckling of P-FGM sandwich beam with porous core on elastic foundation", a coupled effect of thermal and electrical loadings on the thermal buckling behavior of functionally graded material (FGM) sandwich beam resting on Pasternak foundation is investigated. The symmetric multi-layered beam consists of a foam core, two middle FGM layers, and two outer piezoelectric layers. It is assumed that the beam is subjected to a constant voltage and a uniform/linear temperature rise.

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Bài báo "Phân tích phi tuyến đáp ứng động của tấm bằng vật liệu FGM rỗng đặt trên nền đàn hồi" trình bày đáp ứng động lực học phi tuyến của tấm bằng vật liệu rỗng (FGP-functionally graded porous materials) đặt trên nền đàn hồi Pasternak. Hệ phương trình động lực học phi tuyến được thiết lập trên cơ sở lý thuyết biến dạng cắt bậc nhất có kể đến tính phi tuyến hình học von-Kárman. Mời các bạn cùng tham khảo!

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A theoretical study of sound transmission loss across a simply supported double-composite sandwich plate filled with poroplastic material is formulated. Biot's theory is employed to describe wave propagation in elastic porous media. The two face composite plates are modeled as classical thin plates. By using the modal superposition theory, a double series solution for the sound transmission loss of the structure is obtained with the help of the Galerkin method.

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The main aim of this paper is to investigate the nonlinear buckling and postbuckling of eccentrically stiffened sandwich functionally graded porous (FGP) cylindrical shells surrounded by elastic foundations in thermal environments and under torsional load by analytical approach in terms of the displacement components.

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In this study, a straightforward process was employed to synthesize Fe3O4 nanoparticlesdecorated porous carbon derived from rice husk waste (Fe3O4/C). The composite material was made by using pyrolysis and then coprecipitation.

13p viohoyo 25-04-2024 4 2   Download

Ebook "Porous organic frameworks: Design, synthesis and their advanced applications" describes the design, synthesis, characterization and applications of porous organic frameworks (POFs). Special emphasis is placed on the utilization of porous materials for CO2 capture and CH4 and H2 storage, which have promising potential for addressing the issues of environmental degradation and climate change. It also includes two chapters introducing the properties of POFs and defining the principles of synthesis, as well as a chapter dealing with post-modified POFs.

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Ebook "Acoustic textiles (Textile science and clothing technology series)" highlights the manufacturing and applications of acoustic textiles in various industries. It also includes examples from different industries in which acoustic textiles can be used to absorb noise and help reduce the impact of noise at the workplace. Given the importance of noise reduction in the working environment in several industries, the book offers a valuable guide for companies, educators and researchers involved with acoustic materials.

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Ebook "Lanthanide metal-organic frameworks" consists of two keywords, “lanthanide” and “metal-organic frameworks”, both of which are among the most active fields of research in chemistry and material science. In comparison with other types of metal ions, lanthanide ions exhibit a large atomic magnetic moment, strong spin-orbital coupling, high coordination number, and abundant coordination modes originating from their unique 4f electronic configurations.

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Ebook "Principles of soft-matter dynamics: Basic theories, non-invasive methods, mesoscopic aspects" covers fundamental dynamic phenomena such as diffusion, relaxation, fluid dynamics, normal modes, order fluctuations, adsorption and wetting processes. It also elucidates the applications of the principles and of the methods referring to polymers, liquid crystals and other mesophases, membranes, amphiphilic systems, networks, and porous media including multiphase and multi-component materials, colloids, fine-particles, and emulsions.

670p coduathanh1122 27-03-2024 3 1   Download

Part 2 book "Practical aspects of chemical engineering - Selected contributions from PAIC 2017" includes content: supercritical fluids in green technologies, applications and properties of physical gels obtained on the basis of cellulose derivatives, selected aspects of dust removal from gas stream for chamber separators, cleaning porous materials using supercritical fluids, large eddy simulations on selected problems in chemical engineering,... and other contents.

241p muasambanhan09 16-03-2024 7 1   Download

Ebook "Modeling and numerical simulations (Modern aspects of electrochemistry, No. 43)" include: mathematical modeling in electrochemistry using finite element and finite difference methods; modeling atomic systems of more than two bodies; modeling impedance of porous electrodes, in order to permit optimal utilization of the active electrode material; modeling of catalyst structure degradation in PEM fuel cells;...

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Ebook "Porous polymeric bioresorbable scaffolds for tissue engineering" discusses the manipulation of polymer chemical structure and composition to tune scaffold physical properties, and optimization of scaffold 3D architecture by a smart use of both fabrication techniques. The multidisciplinary nature of this research is imperative in pursuing the challenge of tissue regeneration successfully.

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Thermal energy storage is gaining more interest as people aim to utilization of solar energy. The thermal energy can be stored in the form of latent heat and used for building applications that require increasing energy. This report investigated the wet impregnation method for the synthesis of thermal storage material, namely phase change composite (PCC) for two purposes: to create a simple method for the synthesis of PCC and study behaviors of phase change material (PCM) when confined inside the pore.

8p vimichaelfaraday 28-12-2023 7 3   Download

In this study, porous carbon aerogel was prepared from freeze-drying cellulose aerogel using recycling paper as raw material. The direct carbonization of cellulose aerogel creates numerous macro- and meso-pores following scheme in Fig.

7p vimichaelfaraday 28-12-2023 7 3   Download