Fundamental Structue of Matter and Interactions

Chen, Jianping

doi:10.2172/1989369

Cited by 45 publications

(59 citation statements)

References 165 publications

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“…where C is the contact coefficient between the crystallites (Shen and Hu, 2006). Superscripts 1 and 2 denote the series model and parallel model, respectively.…”

Section: Determination Of Model Parametersmentioning

confidence: 99%

Thermo-mechanical modeling of semicrystalline triple shape memory polymers

Bian

Cai

et al. 2023

Journal of Intelligent Material Systems and Structures

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Compared with amorphous shape memory polymers (SMPs), semicrystalline SMPs have more diverse shape memory effects (SMEs) which promotes their application in smart structures. To reveal the driving mechanism of the triple SMEs of semicrystalline SMPs, our study focuses on developing the constitutive model under the condition of finite deformation. In the paper, a thermo-mechanical constitutive model under consideration of the second law of thermodynamics is developed based on the theory of thermodynamics with internal state variables. The model can be used to describe the nonequilibrium response of the amorphous and semicrystalline components in the vicinity of the glass transition, melting, and crystallization. To verify the validity of model, numerical simulation is carried out for a thermo-mechanical shape memory cycle which can be divided into a two-step programing process and a two-step recovery process. The comparison between the model results and the test data shows good agreement.

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“…where C is the contact coefficient between the crystallites (Shen and Hu, 2006). Superscripts 1 and 2 denote the series model and parallel model, respectively.…”

Section: Determination Of Model Parametersmentioning

confidence: 99%

Thermo-mechanical modeling of semicrystalline triple shape memory polymers

Bian

Cai

et al. 2023

Journal of Intelligent Material Systems and Structures

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“…Zhu et al [50,51] also proposed the "nanoparticle modulation" technique, which reduces the cohesion of fine particles and improves their flow and fluidization quality by applying ultrafine nanoparticles as fluidization additives. On the other hand, Huang et al [52] analyzed the influence of the surface roughness on interparticle forces, and the control over interparticle forces can improve the fluidization performance of particles. In the dry gas-solid reaction system, the fluidization characteristics of particles depend on the cohesive force (mainly the vdW force) and gravity, and the ratio of the cohesive force to gravity can reflect the relative strength of the cohesive force of particles, which can be defined by the dimensionless cohesive number C o .…”

Section: Fluidization Mechanism Of Nano Agglomerationsmentioning

confidence: 99%

Fluidization and Application of Carbon Nano Agglomerations

Chen,

Jiang,

Zhu

et al. 2023

Advanced Science

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Carbon nanomaterials are unique with excellent functionality and diverse structures. However, agglomerated structures are commonly formed because of small‐size effects and surface effects. Their hierarchical assembly into micro particles enables carbon nanomaterials to break the boundaries of classical Geldart particle classification before stable fluidization under gas‐solid interactions. Currently, there are few systematic reports regarding the structural evolution and fluidization mechanism of carbon nano agglomerations. Based on existing research on carbon nanomaterials, this article reviews the fluidized structure control and fluidization principles of prototypical carbon nanotubes (CNTs) as well as their nanocomposites. The controlled agglomerate fluidization technology leads to the successful mass production of agglomerated and aligned CNTs. In addition, the self‐similar agglomeration of individual ultralong CNTs and nanocomposites with silicon as model systems further exemplify the important role of surface structure and particle‐fluid interactions. These emerging nano agglomerations have endowed classical fluidization technology with more innovations in advanced applications like energy storage, biomedical, and electronics. This review aims to provide insights into the connections between fluidization and carbon nanomaterials by highlighting their hierarchical structural evolution and the principle of agglomerated fluidization, expecting to showcase the vitality and connotation of fluidization science and technology in the new era.

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“…The motion of the rigid body barycenter is decomposed into the translational motion of this point and the rotation around this point, which is described by 15 equations combined with 15 variables. The relevant equations can be expressed as follows [14]:…”

Section: Kinetic Equationsmentioning

confidence: 99%

Equilibrium Analysis and Simulation Calculation of Four-Star Type Crank Linkage Mechanism

Chai

Lou

2023

Machines

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Unbalanced inertia force is inevitably generated during the operation of crank linkage. It is one of the main excitation sources of air compressor vibration and the focus of managing air compressor vibration noise. In this regard, this paper studies the variation law of inertia force in the four-star type crank linkage mechanism. Certain balancing methods are used to reduce the unbalanced inertia force. Firstly, we present a comparison of perfect and partial balanced problems of crank linkage inertia forces. Then, using the ADAMS software multibody dynamics calculation method, the balancing mass is numerically calculated to optimize the design of the balancing mass for partial balancing of inertia force. Next, the influence law of piston mass asymmetry on the force of crankshaft revolving pair is studied. Lastly, two new types of four-star type crank linkage mechanism are proposed from the viewpoint of completely balanced inertia forces and moments of inertia. The results show that the perfectly balanced inertia force is better than the partially balanced inertia force in terms of a balancing effect. The parametric design of ADAMS software is more efficient and can get the best quality quickly. The design of perfectly balanced inertia force will increase the length and complexity of the crankshaft, while reducing the structural strength. The research results of this paper are important for improving the vibration damping performance of marine air compressors.

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Fundamental Structue of Matter and Interactions

Cited by 45 publications

References 165 publications

Thermo-mechanical modeling of semicrystalline triple shape memory polymers

Thermo-mechanical modeling of semicrystalline triple shape memory polymers

Fluidization and Application of Carbon Nano Agglomerations

Equilibrium Analysis and Simulation Calculation of Four-Star Type Crank Linkage Mechanism

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