Special Issue "Modeling of Heterogeneous Materials"

Submission Deadline: 20 April 2021 (closed)
Guest Editors
Prof. Lisheng Liu, Wuhan University of Technology, China
Prof. Xihua Chu, Wuhan University, China
Prof. Xinhua Yang, Huazhong University of Science and Technology, China
Prof. Jianzhong Chen, Wuhan University of Technology, China
Prof. Qun Huang, Wuhan University, China

Summary

Heterogeneous materials, composed of different materials, are increasingly being used in engineering applications. It is important to be able to predict the properties and material response for heterogeneous materials. Modeling method is a basic and important method to fulfill this task. But modeling of heterogeneous materials is still a complex task.

The topics discussed in this special issue include different modeling methods and modeling scales of all kinds of heterogeneous materials. In addition, the design and analysis of heterogeneous materials are included in the special issue. Topics of interest for this Special Issue include, but are not limited to:

• multiscale modeling method of heterogeneous materials

• finite element method of heterogeneous materials

• molecular dynamics of heterogeneous materials

• peridynamics of heterogeneous materials

• modeling of strength and stiffness of heterogeneous materials

• modeling of damage of heterogeneous materials

• modeling of fatigue of heterogeneous materials

• modeling of long-term properties of heterogeneous materials


Keywords
• heterogeneous materials
• multiscale
• finite element method
• molecular dynamics
• meshfree
• peridynamics

Published Papers
  • Simulation of Elastic and Fatigue Properties of Epoxy/SiO2 Particle Composites through Molecular Dynamics
  • Abstract The influence of different nanoparticle sizes on the elastic modulus and the fatigue properties of epoxy/SiO2 nanocomposite is studied in this paper. Here, the cross-linked epoxy resins formed by the combination of DGEBA and 1,3-phenylenediamine are used as the matrix phase, and spherical SiO2 particles are used as the reinforcement phase. In order to simulate the elastic modulus and long-term performance of the composite material at room temperature, the simulated temperature is set to 298 K and the mass fraction of SiO2 particles is set to 28.9%. The applied strain rate is 109/s during the simulation of the elastic modulus.… More
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  • A Simple Cement Hydration Model Considering the Influences of Water-to-Cement Ratio and Mineral Composition
  • Abstract A simple hydration model is used here by taking the composition of the cement and the initial water: cement ratio (w/c) into account explicitly. Its conceptual basis is a combination of the Avrami equation and Bentz’s model based on simple spatial considerations. In this model, the Avrami equation determines the initial reaction, and Bentz’s model describes the following hydration stage. The model favors engineers for it relies on one experimental parameter and has a reliable approximation in the practice. More
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  • In-Plane Impact Dynamics Analysis of Re-Entrant Honeycomb with Variable Cross-Section
  • Abstract Due to the unique deformation characteristics of auxetic materials (Poisson’s ratio ), they have better shock resistance and energy absorption properties than traditional materials. Inspired by the concept of variable cross-section design, a new auxetic re-entrant honeycomb structure is designed in this study. The detailed design method of re-entrant honeycomb with variable cross-section (VCRH) is provided, and five VCRH structures with the same relative density and different cross-section change rates are proposed. The in-plane impact resistance and energy absorption abilities of VCRH under constant velocity are investigated by ABAQUS/EXPLICIT. The results show that the introduction of variable cross-section design can… More
  •   Views:346       Downloads:284        Download PDF

  • Numerical Analysis of Three-Layer Deep Tunnel Composite Structure
  • Abstract To date, with the increasing attention of countries to urban drainage system, more and more regions around the world have begun to build water conveyance tunnels, sewage pressure deep tunnels and so on. However, the sufficient bearing capacity and corrosion resistance of the structure, which can ensure the actual service life and safety of the tunnel, remain to be further improved. Glass Fiber Reinforced Plastics (GFRP) pipe, with light weight, high strength and corrosion resistance, has the potential to be applied to the deep tunnel structure. This paper proposed a new composite structure of deep tunnel lined with GFRP pipe,… More
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  • Peridynamic Modeling and Simulation of Fracture Process in Fiber-Reinforced Concrete
  • Abstract In this study, a peridynamic fiber-reinforced concrete model is developed based on the bond-based peridynamic model with rotation effect (BBPDR). The fibers are modelled by a semi-discrete method and distributed with random locations and angles in the concrete specimen, since the fiber content is low, and its scale is smaller than the concrete matrix. The interactions between fibers and concrete matrix are investigated by the improvement of the bond’s strength and stiffness. Also, the frictional effect between the fibers and the concrete matrix is considered, which is divided into static friction and slip friction. To validate the proposed model, several… More
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  • Behavior of High Strength Concrete Filled Square Steel Tube Stub Columns with Inner CFRP Tube Under Biaxial Eccentric Compression
  • Abstract This paper studies the contribution of CFRP (carbon fiber-reinforced polymer) to the mechanical behavior of high strength concrete-filled square steel tube (HCFST) under biaxial eccentric compression. The new type of composite member is composed of an inner CFRP tube and an outer steel tube with concrete filled in the two tubes. The finite element analysis was made by ABAQUS on the behavior of high strength concrete filled square steel tubular columns with inner CFRP circular tube subjected to bi-axial eccentric loading. The results obtained from the finite element analysis were verified with the experimental results. In addition, the load-deflection curves… More
  •   Views:340       Downloads:275        Download PDF

  • Adaptive Extended Isogeometric Analysis for Steady-State Heat Transfer in Heterogeneous Media
  • Abstract Steady-state heat transfer problems in heterogeneous solid are simulated by developing an adaptive extended isogeometric analysis (XIGA) method based on locally refined non-uniforms rational B-splines (LR NURBS). In the XIGA, the LR NURBS, which have a simple local refinement algorithm and good description ability for complex geometries, are employed to represent the geometry and discretize the field variables; and some special enrichment functions are introduced into the approximation of temperature field, thus the computational mesh is independent of the material interfaces, which are described with the level set method. Similar to the approximation of temperature field, a temperature gradient recovery… More
  •   Views:456       Downloads:407        Download PDF