Duning Li, Yufeng Niei?a, Xuemei Zhou, Li Cai

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 75-76, 2011, DOI:10.3970/icces.2011.019.075

Abstract In this study, the efficient discrete model including the resin infusion and the fiber compaction is developed to simulate the RFI (resin film infusion) process. The non-linear governing equations are derived by the Darcy's law, the Terzaghi's law and the continuity equations. The finite element method and the finite difference method are used to discretize the proposed equations, and the VOF method is used to track the filling front. Compared with the analytical results of Park, our numerical results agree well with them. Furthermore, we analyze the RFI process of BMI/G0814, and simulate the resin pressure, the fiber volume fraction… More >

Qin Siwei, Shen SP

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 53-54, 2011, DOI:10.3970/icces.2011.019.053

Abstract Among many multiscale methods ,we choose the quasicontinuum method to understand the mechanical response at the nanocrystalline of grain boundaries(GBs) under tension. The energetic and mechanical strength of 6 i?"<110> symmetric tilt GBs are investigated in nanocrystalline Cu and Ni. We focus on discussing the interaction of the structural units of symmetric tilt GB for the initial deformation mode and the strength of model. At the basis of the previous, We study the nanocrystalline Cu/a-Al2O3 interface and analyze the relationship during the grains orientations, GB energy and interface. Special emphasis is placed on the crystal slip from the interface across… More >

JIA Bao-xin, PAN Yi-shan, LI Guo-zhen

The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.4, pp. 109-110, 2011, DOI:10.3970/icces.2011.016.109

Abstract Currently mines seismic emergence mechanism is unclear. To solve this problem, the article analyzes the occurring mechanism of mines seismic and studies the mines seismic classification. Meanwhile we establish three-Dimension excitation model of mines seismic, then derive the propagation model of mines seismic. Research shows that Coal-rock mass produced brittle fracture when outside force to exceed its ultimate strength in complex stress, after the release of energy generate mines seismic. The establishment of the model explains mines seismic occurrence mechanism, and provides the theoretical foundation for mines seismic magnitude calculation and accurate Orientation in the future. More >

Xiaoyang LU, Bingtao TANG

The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.2, pp. 37-38, 2011, DOI:10.3970/icces.2011.016.037

Abstract Bending movements will be caused when elements passing by die entrance radius. The classical inverse analysis method (CIAM) uses the constitutive equation based on deformation theory of plasticity. Based on the assumption of the proportional loading, Hencky deformation theory is adopted. The secant modulus is obtained from uniaxial tensile curve and the plastic strain rate can be directly integrated to obtain a total plastic strain expression. The CIAM of sheet metal stamping has the shortcomings of no consideration of the effects of deformation history on stress prediction. Therefore, there is some discrepancy between the stress calculated with CIAM and that… More >

Haofeng Chen

The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.2, pp. 35-36, 2011, DOI:10.3970/icces.2011.016.035

Abstract In this paper a state-of-the-art numerical method is discussed for the evaluation of the shakedown and ratchet limits for an elastic-perfectly plastic body subjected to cyclic thermal and mechanical load history. The limit load, i.e. the load carrying capacity, is also determined as a special case of shakedown analysis. These design limits in plasticity have been solved by characterising the steady cyclic state using a general cyclic minimum theorem. For a prescribed class of kinematically admissible inelastic strain rate histories, the minimum of the functional for these design limits are found by a programming method, the Linear Matching Method (LMM),… More >

Weiming Tao¹, Xingwang Yang¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.3, pp. 83-84, 2009, DOI:10.3970/icces.2009.012.083

Abstract Laser controlled separation of brittle materials like glass is a promising non-conven\discretionary {-}{}{}tional cutting method. It is an application of the crack propagation driven by thermal stresses induced by laser irradiation. In order to induce and control a crack propagating accurately along predetermined asymmetric trajectory in a brittle plate, an iterative method for effective laser scanning path was presented, and the effect of control parameters on the convergence was investigated. The iterative formulation for laser scanning path was based on PID control theory, which was composed of deviation of the crack from predetermined trajectory and its integral and differential. To… More >

Iizuka Yoichiro¹, Hiroshi Yamaura

The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.1, pp. 23-42, 2008, DOI:10.3970/icces.2008.007.023

Abstract Crown rollers are often used in the flexible media transport mechanism consists of a rubber layered roller and a steel roller. In this paper, the flexible media transport characteristics of crown roller is investigated theoretically. The purpose of this study is to analyze the flexible media transport characteristics such as longitudinal distribution of nip pressure, traction and transport velocity and so on, and to develop the design method of crown roller that has desired characteristics. More >

T. Tanaka¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.4, No.4, pp. 251-256, 2007, DOI:10.3970/icces.2007.004.251

Abstract The viscoplastic constitutive relations with kinematic strain hardening-softening model for geomaterials are developed. The constitutive models include strain-rate dependent properties based on the thoery by Duvaut-Lions. The dynamic relaxation method for static problems and the dynamic analysis for earthquake responses are applied to boundary value problems using finite element methods. More >

Qinfu Hou^1,*, Dianyu E.^1,2, Shibo Kuang¹, Aibing Yu^1,3

The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.1, pp. 96-97, 2019, DOI:10.32604/icces.2019.05438

Abstract Intensive heat and mass transfer between continuum fluids and discrete particulate materials plays a critical role in many chemical reactors [1]. For example, the shaft furnace and the blast furnace in ironmaking are operated with continuous charge and discharge of solid materials, and it takes hours for the solid materials moving from the furnace top to the bottom. To understand and improve the operation of these reactors, discrete particle models are very helpful when combined with flow, heat and mass transfer, and chemical reaction models [2-6]. However, due to the high computational cost with such discrete particle models, it is… More >

Yuzhou Sun¹, Yuchao Mu²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.1, pp. 115-115, 2019, DOI:10.32604/icces.2019.05304

Abstract Due to its double-structure property, the higher-order continuum theory is adopted to study the constitutive behavior of expansive soil. The higher-order strain and scale factor are considered to describe the effect of the microscale structural property on the macroscale behavior, and a higher-order multiscale constitutive model is developed for expansive soil. The effect of the microscale structural property is investigated through the theoretical and experimental studies based on the developed model. In virtue of a representative elementary volume, the double-structure property is better studied for expansive soil. A variational equation is developed with the contribution of the liquid and gas… More >