Home / Journals / CMES / Vol.86, No.5, 2012
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  • Open Access

    ARTICLE

    A Computational Inverse Technique for Uncertainty Quantification in an Encounter Condition Identification Problem

    W. Zhang1, X. Han1,2, J. Liu1, R. Chen1
    CMES-Computer Modeling in Engineering & Sciences, Vol.86, No.5, pp. 385-408, 2012, DOI:10.3970/cmes.2012.086.385
    Abstract A novel inverse technique is presented for quantifying the uncertainty of the identified the results in an encounter condition identification problem. In this technique, the polynomial response surface method based on the structure-selection technique is first adopted to construct the approximation model of the projectile/target system, so as to reduce the computational cost. The Markov Chain Monte Carlo method is then used to identify the encounter condition parameters and their confidence intervals based on this cheap approximation model with Bayesian perspective. The results are demonstrated through the simulated test cases, which show the utility and efficiency of the proposed technique.… More >

  • Open Access

    ARTICLE

    Impact Failure Analysis of Reinforced Concrete Structural Components by Using Finite Element Method

    A. Ramachandra Murthy1 , G.S. Palani1 , Nagesh R. Iyer1 , Smitha Gopinath1 and V. Ramesh Kumar1
    CMES-Computer Modeling in Engineering & Sciences, Vol.86, No.5, pp. 409-434, 2012, DOI:10.3970/cmes.2012.086.409
    Abstract This paper presents the details of projectile impact on reinforced concrete structural components. Nonlinear explicit transient dynamic analysis has been carried out by using finite element method. Concrete damage model has been employed to represent the nonlinear behaviour of target under impact load. Various methods of modeling of reinforcement have been explained. A brief note on equation of state for concrete, contact algorithms and nonlinear explicit transient dynamic analysis has been given. Numerical studies have been carried out to compute the response of concrete target due to impact of projectile. The computed penetration depth have been compared with the corresponding… More >

  • Open Access

    ARTICLE

    A Higher Order Solution of the Elastic Problem for a Homogeneous, Linear-Elastic and Isotropic Half-Space Subjected to a Point-Load Perpendicular to the Surface

    E. Ferretti1
    CMES-Computer Modeling in Engineering & Sciences, Vol.86, No.5, pp. 435-468, 2012, DOI:10.3970/cmes.2012.086.435
    Abstract A recent experimental programme with the aim of acquiring the strains induced by aircraft traffic in concrete pavements [Ferretti and Bignozzi (2012); Ferretti (2012a)] has provided the opportunity of reviewing the classical solution of Boussinesq's problem for a homogeneous linear-elastic and isotropic half-space subjected to a point-load. In this document, we have proposed a second order solution to Boussinesq's problem, which allows us to account for the new experimental evidence. More >

  • Open Access

    ARTICLE

    Ale Formulation with Explosive Mass Scaling for Blast Loading: Experimental and Numerical Investigation

    Souli M.1, Bouamoul A.2, Nguyen-Dang T.V.3
    CMES-Computer Modeling in Engineering & Sciences, Vol.86, No.5, pp. 469-486, 2012, DOI:10.3970/cmes.2012.086.469
    Abstract Protection of military vehicles against blast mine and high explosive in air is of a great concern in defence industry. Anti-Vehicle (AV) mines and Improvised Explosive Devices (IED's) are capable of inflecting damage to heavy vehicles. For the last decades, numerical simulation of blast wave propagation and its interaction with surrounding structures becomes more and more the focus of computational engineering, since experimental tests are very expensive and time consuming. This paper presents an experimental and numerical investigation of blast wave propagation in air, using an Arbitrary Lagrangian Eulerian (ALE) multi-material formulation developed in LS-DYNA with the contribution of the… More >

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