The Experts below are selected from a list of 83388 Experts worldwide ranked by ideXlab platform

Gérard Morel - One of the best experts on this subject based on the ideXlab platform.

  • Manufacturing Execution System for Customised Production
    Journal of Materials Processing Technology, 2006
    Co-Authors: Jean Marcelo Simão, Paulo Cézar Stadzisz, Gérard Morel
    Abstract:

    Mass customised manufacturing is a current tendency in many production sectors. In this scenario, the client details the desired product often using informatics means and respecting available options. This customisation context imposes systemic Integration and co-operations between the concerned manufacturing entities to explore their capabilities, aiming at adaptability to the product heterogeneity. An Integration Element of the management system and systems related to the shop floor is the Manufacturing Execution System (MES). A conceivable way to allow MES supporting this customised e-manufacturing is the concept of smart-product, where each product “drives” its own production, allowing a decoupling between production and order dispatching, as well as the consistency between physical and informational flows. A smart-product requests services from manufacturing resources and it can compete for them. These resources must co-operate based on their features and based on some established flexible co-operation logic, aiming to carry out smart-products requests. However, this is by itself another issue, firstly due to the heterogeneity of factory resources. Looking for homogenisation and Integration of this diversity, resources and also smart-products may be “encapsulated” inside of communicating entities called “holons”. However, the composition of holonic MES (H-MES) is not trivial, because of the dynamic between all holons may be complex. Previous studies presented the organisation of Resource-HLs co-operation carried out by computational entities called “Rules”. In this paper, it is proposed a conceptual solution of a meta-model for Rules-oriented and product-driven H-MES and its application for the holonification of a design and simulation tool.

  • MANUFACTURING EXECUTION SYSTEMS FOR CUSTOMISED PRODUCTION
    2005
    Co-Authors: Jean Marcelo Simão, Paulo Cézar Stadzisz, Gérard Morel
    Abstract:

    Mass customised manufacturing is a current tendency in many production sectors. In this scenario, the client details the desired product often using informatics means and respecting available options. This customisation context imposes systemic Integration and co-operations between the concerned manufacturing entities to explore their capabilities, aiming at adaptability to the product heterogeneity. An Integration Element of the management system and systems related to the shop floor is the Manufacturing Execution System (MES). A conceivable way to allow MES supporting this customised e-manufacturing is the concept of smart-product, where each product “drives” its own production, allowing a decoupling between production and order dispatching, as well as the consistency between physical and informational flows. A smart-product requires services from manufacturing resources and it can compete for them. These resources must co-operate based on their features and based on some established flexible co-operation logic, aiming to carry out smart-products requirements. However, this is by itself another issue, firstly due to the heterogeneity of factory resources. Looking for homogenisation and Integration of this diversity, resources and also smart-products may be “encapsulated” inside of communicating entities called “holons”. However, the composition of holonic MES (H-MES) is not trivial, because of the dynamic between all holons may be complex. Previous studies presented the organisation of Resource-HLs co-operation carried out by computational entities called “Rules”. In this article, it is proposed a conceptual solution of a meta-model for Rules-oriented and product-driven H-MES and its application for the holonification of a design and simulation tool.

Shurong Zheng - One of the best experts on this subject based on the ideXlab platform.

  • A hybrid stress nine-node degenerated shell Element for geometric nonlinear analysis
    Computational Mechanics, 1999
    Co-Authors: Kam Yim Sze, Shurong Zheng
    Abstract:

    A stabilized nine-node degenerated shell Element, previously derived for linear analysis by the admissible matrix formulation, is extended to geometrically nonlinear analysis. The assumed stress modes pertinent to stabilization matrix are contravariant in nature and their energy products with the displacement-derived covariant strain can be programmed without resorting to numerical Integration and the Gram-Schmidt orthogonalization. Numerical tests show that its accuracy is virtually identical to the uniformly reduced Integration Element.

H F Nied - One of the best experts on this subject based on the ideXlab platform.

  • stress intensity factors for three dimensional surface cracks using enriched finite Elements
    International Journal for Numerical Methods in Engineering, 2002
    Co-Authors: Ali Ayhan, H F Nied
    Abstract:

    The analysis of three-dimensional crack problems using enriched crack tip Elements is examined in this paper. It is demonstrated that the enriched finite Element approach is a very effective technique for obtaining stress intensity factors for general three-dimensional crack problems. The influence of compatibility, Integration, Element shape function order, and mesh refinement on solution convergence is investigated to ascertain the accuracy of the numerical results. It is shown that Integration order has the greatest impact on solution accuracy. Sample results are presented for semi-circular surface cracks and compared with previously obtained solutions available in the literature. Good agreement is obtained between the different numerical solutions, except in the small zone near the free surface where previously published results have often neglected the change in the stress singularity at the free surface. The enriched crack tip Element appears to be particularly effective in this region, since boundary conditions can be easily imposed on the stress intensity factors to accurately represent the correct free surface condition. Copyright © 2002 John Wiley & Sons, Ltd.

Jiang Tao - One of the best experts on this subject based on the ideXlab platform.

  • An improved nodal Integration Element-Free Galerkin method and its application in flow problems
    2012
    Co-Authors: Wang Yu-long, Ouyang Jie, Wang Xiaodong, Jiang Tao
    Abstract:

    Element-Free Galerkin(EFG) method is intensive computation due to the requirement of background cells quadrature,and may appear non-physical oscillations in solving convection dominated problems.To solve these problems,a local Taylor expansion Integration Element-Free Galerkin(LTEI-EFG) method is proposed in this paper,which based on the idea of Integration for local Taylor expansion.This method can not only save computation cost but also eliminate non-physical oscillation in solving convection dominated problem.Numerical examples of one-dimensional convection diffusion equation and two-dimensional Burgers' equation show that the LTEI-EFG method is accurate and much more efficient than EFG method.

  • Nodal Integration Element-free Galerkin Method with Upwind Shifted Integration Nodes
    Chinese Journal of Computational Physics, 2012
    Co-Authors: Jiang Tao
    Abstract:

    A stable and efficient Element-free Galerkin method is proposed for steady convection-diffusion problems.In the method Integrations are computed with a local Taylor expansion nodal integral technique.According to convection-dominated degree,Integration nodes are adaptively shifted opposite to the streamline direction.Compared with conventional Element-free Galerkin method with stabilization,the method exhibits better stability and higher efficiency in solving convection-dominated convection-diffusion problems.It is a pure meshfree method,which is independent of background integral.Moreover,the method is easy to be implemented.

Jean Marcelo Simão - One of the best experts on this subject based on the ideXlab platform.

  • Manufacturing Execution System for Customised Production
    Journal of Materials Processing Technology, 2006
    Co-Authors: Jean Marcelo Simão, Paulo Cézar Stadzisz, Gérard Morel
    Abstract:

    Mass customised manufacturing is a current tendency in many production sectors. In this scenario, the client details the desired product often using informatics means and respecting available options. This customisation context imposes systemic Integration and co-operations between the concerned manufacturing entities to explore their capabilities, aiming at adaptability to the product heterogeneity. An Integration Element of the management system and systems related to the shop floor is the Manufacturing Execution System (MES). A conceivable way to allow MES supporting this customised e-manufacturing is the concept of smart-product, where each product “drives” its own production, allowing a decoupling between production and order dispatching, as well as the consistency between physical and informational flows. A smart-product requests services from manufacturing resources and it can compete for them. These resources must co-operate based on their features and based on some established flexible co-operation logic, aiming to carry out smart-products requests. However, this is by itself another issue, firstly due to the heterogeneity of factory resources. Looking for homogenisation and Integration of this diversity, resources and also smart-products may be “encapsulated” inside of communicating entities called “holons”. However, the composition of holonic MES (H-MES) is not trivial, because of the dynamic between all holons may be complex. Previous studies presented the organisation of Resource-HLs co-operation carried out by computational entities called “Rules”. In this paper, it is proposed a conceptual solution of a meta-model for Rules-oriented and product-driven H-MES and its application for the holonification of a design and simulation tool.

  • MANUFACTURING EXECUTION SYSTEMS FOR CUSTOMISED PRODUCTION
    2005
    Co-Authors: Jean Marcelo Simão, Paulo Cézar Stadzisz, Gérard Morel
    Abstract:

    Mass customised manufacturing is a current tendency in many production sectors. In this scenario, the client details the desired product often using informatics means and respecting available options. This customisation context imposes systemic Integration and co-operations between the concerned manufacturing entities to explore their capabilities, aiming at adaptability to the product heterogeneity. An Integration Element of the management system and systems related to the shop floor is the Manufacturing Execution System (MES). A conceivable way to allow MES supporting this customised e-manufacturing is the concept of smart-product, where each product “drives” its own production, allowing a decoupling between production and order dispatching, as well as the consistency between physical and informational flows. A smart-product requires services from manufacturing resources and it can compete for them. These resources must co-operate based on their features and based on some established flexible co-operation logic, aiming to carry out smart-products requirements. However, this is by itself another issue, firstly due to the heterogeneity of factory resources. Looking for homogenisation and Integration of this diversity, resources and also smart-products may be “encapsulated” inside of communicating entities called “holons”. However, the composition of holonic MES (H-MES) is not trivial, because of the dynamic between all holons may be complex. Previous studies presented the organisation of Resource-HLs co-operation carried out by computational entities called “Rules”. In this article, it is proposed a conceptual solution of a meta-model for Rules-oriented and product-driven H-MES and its application for the holonification of a design and simulation tool.