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Computers and Concrete
  Volume 7, Number 2, April 2010 , pages 145-158

Integration of the microplane constitutive model into the EPIC code
David Littlefield, Kenneth C. Walls and Kent T. Danielson

    In this work the implementation of a production-level port of the Microplane constitutive model for concrete into the EPIC code is described. The port follows guidelines outlined in the Material Model Module (MMM) standard used in EPIC to insure a seamless interface with the existing code. Certain features of the model were not implemented using the MMM interface due to compatibility reasons; for example, a separate module was developed to initialize, store and update internal state variables. Objective strain and deformation measures for use in the material model were also implemented into the code. Example calculations were performed and illustrate the veracity of this new implementation.
Key Words
    microplane model; constitutive model framework; EPIC code.
David Littlefield: Department of Mechanical Engineering, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
Kenneth C. Walls: The University of Alabama at Birmingham, Birmingham, AL 35294, USA
Kent T. Danielson: US Army Engineer Research and Development Center, Vicksburg, MS 39180, USA

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