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  • Open Access

    ABSTRACT

    Coupling Atomistic and Continuum Finite Element Models: Multi-Scale Simulations of Nanotribological Contacts of Nanometer Scale Coatings

    Baolin Wang1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.2, pp. 81-84, 2008, DOI:10.3970/icces.2008.008.081

    Abstract When the size of a physical system is smaller than its characteristic dimensions, the macroscopic viewpoint may not be applicable. In addition, experiments at micro/nanometer scale are difficult and the analysis of nano-experimental data is far from simple. This is mostly due to the lack of effective models that are able to study the structural characteristics and mechanics behavior of the micro/nanometer physical systems. Atomic simulation simulation has been used extensively in the investigation of nanoscale phenomena. However, the size limit of atomic simulation is far short to reach the macroscale because of the limitation More >

  • Open Access

    ABSTRACT

    Buckling Behavior of Elastic Kelvin Open-Cell Foams Subjected to Uniaxial Compression

    N. Ohno1, D. Okumura1, A. Okada1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.2, pp. 73-80, 2008, DOI:10.3970/icces.2008.008.073

    Abstract This paper describes buckling modes and stresses of elastic Kelvin open-cell foams subjected to uniaxial compressions. Cubic unit cells and cell aggregates in model foams are analyzed using a homogenization theory. The analysis is performed on the assumption that the struts in foams have a non-uniform distribution of cross-sectional areas as observed experimentally. By performing the analysis based on the uniformity of strut cross-sectional areas, it is shown that the non-uniformity of cross-sectional areas is an important factor for the buckling behavior of open-cell foams. More >

  • Open Access

    ABSTRACT

    Fatigue Crack Growth Simulation using S-version FEM

    M. Kikuchi1, Y. Wada2, A. Utsunomiya3, Y. Li4

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.2, pp. 67-72, 2008, DOI:10.3970/icces.2008.008.067

    Abstract Fatigue crack growth under mixed mode loading conditions is simulated using S-FEM. By using S-FEM technique, only local mesh should be re-meshed and it becomes easy to simulate crack growth. By combining with auto-meshing technique, local mesh is re-meshed automatically, and curved crack path is modeled easily. Three dimensional surface crack problem is solved by this technique. Pure mode I crack and slant crack problems are solved, and fatigue crack growth processes are simulated. The change of aspect ratio of surface crack and distributions of stress intensity factor along crack front are evaluated and discussed. More >

  • Open Access

    ABSTRACT

    Ankle Joint Model with Applications in Extreme Situations of Ligament Traumas

    Radu-Mihai Iacob1, Emil Budescu2, Virgil Atanasiu2, Radu Ibˇanescu2, Dan Zaharia3

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.2, pp. 59-66, 2008, DOI:10.3970/icces.2008.008.059

    Abstract This article has no abstract. More >

  • Open Access

    ABSTRACT

    Contribution as for the Optimization of the Pumping Stations

    A. Alexenadrescu1, A.S. Alex,rescu1, A.C. Alexandrescu1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.2, pp. 47-58, 2008, DOI:10.3970/icces.2008.008.047

    Abstract The paper follows the analyse of the connections between the constructive, working parameters, the annual energy consumptions and the energy quantity included in fitting out; it will formulate a methodology of establishment of the optimum values of the parameters of admeasurements of the pumping stations for the setting under pressure, of pipes networks, what ensure an optimum consumption of energy during of duty of the fitting out (the operational energy and the included energy in the networks, equipment and constructions), of the conditions after that it can be obtained. It will follow the generalization of More >

  • Open Access

    ABSTRACT

    An Improved Tracking Technique for Assessment of High Resolution Dynamic Radiography Kinematics

    G. Papaioannou1, C. Mitrogiannis1, G. Nianios1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.2, pp. 41-46, 2008, DOI:10.3970/icces.2008.008.041

    Abstract Previous attempts to track skeletal kinematics from sequences of images acquired using biplane dynamic radiography report challenges in automating the tracking technique due to image resolution issues, occlusion from segments appearing synchronously in the field of view and computational load. This translates into many hours of manual work to export the kinematics. The proposed new tracking method tackles the above problems and reduces the time to export kinematics from several hours to less than 3 minutes. More >

  • Open Access

    ABSTRACT

    The Human Impact Biomechanics in Rugby Game

    Emil I. Budescu1, Ioan Iacob2

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.1, pp. 31-40, 2008, DOI:10.3970/icces.2008.008.031

    Abstract This article has no abstract. More >

  • Open Access

    ABSTRACT

    A New Equation to Determine the Springback in the Bending Process of Metallic Sheet

    Z. Damián-Noriega1, R. Pérez-Moreno1, S.A. Villanueva-Pruneda1, V.M. Domínguez-Hernández2, J.P.A. Puerta-Huerta1, C. Huerta-Muñoz3

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.1, pp. 25-30, 2008, DOI:10.3970/icces.2008.008.025

    Abstract In this work, a new equation to predict the springback in the bending and rolling processes of metallic sheet is presented. This equation has been experimentally applied in the design of a wood truncated cone to form an aluminum sheet truncated cone. Kalpakjian's equation was also applied but Damian's equation has given the best performance. More >

  • Open Access

    ABSTRACT

    An Experimental Method for Kinematic Measurement of a Four-Bar Mechanism by Digital Video Analysis

    Romy P. Moreno1, Mario G. Villeda2, Sergio A. V. Pruneda2, Zeferino D. Noriega2, Pedro G. Segura2

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.1, pp. 19-24, 2008, DOI:10.3970/icces.2008.008.019

    Abstract Measuring the position, speed and acceleration of the moving elements of a mechanism usually involves external instrumentation that has to be attached to it, which is not always feasible. The method discussed here provides an alternative to measure these kinematics characteristics without modifying the components. To test the method in a controlled environment a four-bar mechanism was build. It was designed to be as thin as possible and to allow arbitrary changes in its lengths. Three commercial programs and a specially designed software (KIMA{\textregistered }) are used to record, analyze, measure, compute and verify the More >

  • Open Access

    ABSTRACT

    Indentation Analysis of a Multi-Layered Hollow Cylinder for the Measurement of Interfacial Toughness in TBC Systems

    Q. Ma1,2, J. L. Beuth1, G. H. Meier3, F. S. Pettit3

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.1, pp. 13-18, 2008, DOI:10.3970/icces.2008.008.013

    Abstract This paper addresses the mechanics of indentation-induced delamination of a coating on a multi-layered hollow cylinder, for application to toughness testing of thermal barrier coating (TBC) systems. An electron-beam physical vapor deposition (EB-PVD) TBC system has been analyzed through a contact finite element model using a standard conical indenter impressed vertically on the top of the cylinder. Two cylinder sizes used in thermal-mechanical fatigue tests in literature have been considered in the analysis, with outer radii of 5.11 mm and 3.08 mm, and inner radii of 3.00 mm and 0.97 mm, respectively. Two boundary conditions More >

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