Open Access
ABSTRACT
Zhifan Zhang*, Haoliang Hu, Cheng Wang*
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 46-46, 2019, DOI:10.32604/icces.2019.06145
Abstract A metal jet can be formed for a shaped charge subjected to air blast, which can cause local damage on structures. As for the high-velocity jet associated with underwater explosion, a high-pressure shock wave and a long-term bubble can be also generated. Underwater structures can be severely damaged by these three loadings. A Smooth Particle Hydrodynamic (SPH) method has advantages of solving problems of large deformations thanks to its mesh-free Lagrange formulation. Therefore, it is applied to simulate an entire process of a metal-jet penetration into underwater structures. First, a verification of near-field underwater explosion was carried out. The obtained… More >
Open Access
ABSTRACT
Jinqing Zhao1, Tianbao Ma*
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 47-47, 2019, DOI:10.32604/icces.2019.06150
Abstract We describe a pseudo arc-length algorithm for numerical resolution of immiscible compressible multi-material flows with the Mie-Grüneisen type equation of state (EOS) governed by the quasi-conservative five-equation model. The governing equation is discretized in space uses the finite volume approach with a second-order accurate Godunov scheme. Time discretization is achieved using the strong stability-preserving high-order Runge-Kutta time discretization scheme. The five-equation model with the Mie-Grüneisen EOS is general enough to model materials with different equations of state and physical states. However, for long simulations, the interface of materials is indistinct because of numerical dissipation. The interfacial compression method is used… More >
Open Access
ABSTRACT
Zhen Chen1,2
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 48-48, 2019, DOI:10.32604/icces.2019.06164
Abstract Multi-phase transient interactions play an important role in modern engineering applications such as additive manufacturing, drilling, hydrofracturing, impact and penetration. It has been shown that the evolution of interfacial failure between different material phases has the nonlocal feature [1], namely, the stress state at a material point depends on the strain distribution around that point in a representative volume of certain size. Hence, local constitutive models cannot predict the real physics associated with interfacial failure evolution. On the other hand, the mesh-based methods cannot describe the real physics involved in the interfacial problems, due to the use of master/slave nodes… More >
Open Access
ABSTRACT
Xiaoyue Yang1, Shuang Xu1,*, Qiwen Liu1
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 49-49, 2019, DOI:10.32604/icces.2019.04889
Abstract In this study, molecular dynamics simulations were performed to study the uniaxial compression deformation of magnesium nanopillars with square and triangular surface notches. The generation and evolution process of internal defects of magnesium nanopillars was analyzed in detail. The results indicated that the triangular notches had little effect on the deformation behavior of magnesium nanopillars, and the governing mechanism of plastic deformation was the initiation and motion of pyramidal dislocations. As for magnesium nanopillars with square notches, the initial plastic deformation was mainly caused by the pyramidal slip. After the notches were closed, {10̅11} <10̅12> twins were observed, the expansion… More >
Open Access
ABSTRACT
John D. Clayton1,2,*, R. Brian Leavy1, Jaroslaw Knap3
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 50-52, 2019, DOI:10.32604/icces.2019.05118
Abstract Diffuse interface models and simulations capture deformation and failure of polycrystalline ceramics with multiple phases. Two heterogeneous ceramic solids are investigated. The first consists of a boron carbide matrix phase embedded with titanium diboride grains. The second consists of diamond crystals with a smaller fraction of silicon carbide grains, where the latter may encapsulate the former in a micro- or nano-crystalline matrix and/or may be interspersed as larger micro-crystals. A general constitutive framework suitable for representing behaviors of all phases of each material system is reported. This framework is implemented in three-dimensional (3D) finite element (FE) simulations of polycrystalline aggregates… More >
Open Access
ABSTRACT
Ying Mao1,*, Ming-Hisao Lee2, Wen-Hwa Chen1
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 53-53, 2019, DOI:10.32604/icces.2019.05306
Abstract 3D printing technology is mainly designed to fabricate irregular-shaped targets, but it undergoes an issue of unavoidable thermal residual stress and may induce serious warping and distortion. To guarantee the quality of the printing 3D irregular-shaped parts, a novel meshless analysis procedure is therefore established in this work. With certain checking mechanisms devised, the nodes used by the meshless analysis are appropriately chosen to represent the irregular geometry of printing parts and fit the growing situation in the printing process. As verified by the temperature measurement in the printing process, uniform temperature of each layer is assumed and the thermal… More >
Open Access
ABSTRACT
Kuan-Peng Chen1,3, An-Cheng Yang1,3, Wen-Jay Lee1, Yi-Ming Tseng2, Nien-Ti Tsou2, Nan-Yow Chen1,*
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 54-54, 2019, DOI:10.32604/icces.2019.05401
Abstract Crystallographic classification of microstructure is a very important issue in material science especially numerous data were generated by experiments or Molecular Dynamic (MD) simulations. Some analysis tools were purposed, such as coordination analysis and Honeycutt-Anderson (HA) pair analysis [1], however, to analyze these huge amounts of data is still quite difficult. Sometimes, crystallography prior knowledge of their structures is also desired in the classification procedures. Not only the task is very labor intensive but also the result is susceptible to errors and is usually lack of objectivity. In this study, we developed a computational workflow which can get characteristic quantities… More >
Open Access
ABSTRACT
Hsin-Yu Chen, Nien-Ti Tsou*
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 55-55, 2019, DOI:10.32604/icces.2019.05403
Abstract Shape memory alloys has been widely applied on actuators and medical devices. The transformation temperature and microstructural evolution play the crucial factors and dominate the behavior of shape memory alloys. In order to understand the influence of the composition of the Ni-Ti on the two factors, molecular dynamics (MD) is adopted to simulate the temperature-induced phase transformation in the current study. In addition, the results are post-processed by the martensite variant identification method. The method allows to reveal the detailed microstructural evolution and the volume fraction of each variant/phase in each case of the composition of Ni-Ti. Many features that… More >
Open Access
ABSTRACT
Wei-Chun Wang1, Tzu-Han Ma1, Chang-Wei Huang2, Nien-Ti Tsou1,*
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 56-56, 2019, DOI:10.32604/icces.2019.05409
Abstract In recent years, the improvement of biomedical materials and their applications have gained much interest and been broadly discussed. Hydrogel, gelatin methacrylate (GelMa), is one of the applications with the greatest potential, such as cell culture, and studied by many researchers. In this study, a system consisting of GelMa and the special particles which can be aligned by applying electric field is developed. The alignment of the particles can alter the curvature of the GelMa substrate. The proposed system which provides the mechanical stimulus to the cell attached on the system due to different deformation curvatures can be used as… More >
Open Access
ABSTRACT
Chang-Wei Huang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.3, pp. 57-57, 2019, DOI:10.32604/icces.2019.05418
Abstract This paper focuses on the interface energy release rate of elastic multilayered beam subjected to four-point bending. Linear elastic fracture mechanics (LEFM) and extended finite element method (XFEM) are adopted to investigate the interface fracture of composite beams. Numerical results obtained from simulations not only verify the accuracy of closed-form solutions for the steady-state interface energy release rate, but also provide the evolution history of interface energy release rate under different crack length. In addition, non-dimensional parametric analyses for interface fracture energy release rate are carried out for the discussion of effects of crack length ratio, elastic modulus ratio, and… More >
Login
Register
Submit a Paper
Propose a Special lssue