Recent ERDC Developments in Computationally Modeling Concrete Under High Rate Events
Abstract
Personnel of the US Army Engineer Research and Development Center (ERDC) have been performing a considerable amount of work in enhancing and developing numerical methods and constitutive models for simulating standard strength and higher strength fiber reinforced concrete. Methods currently under investigation include one based upon the Reproducing Kernel Particle Method (RKPM) and another using the Lattice Discrete Particle Method (LDPM). Developments in constitutive models include the generation of the Advanced Fundamental Concrete (AFC) model, based on improving the Holmquist-Johnson-Cook (HJC) model, and the adaptation of the Microplane Model to include the effects of fibers. A set of experiments was performed where a fragment simulating projectile (FSP) penetrated several thicknesses of a fiber reinforced concrete (FRC) panel. Several of the methods and material models were used to simulate these tests, concentrating on various ways to model the FRC. The HJC model, the AFC model, and the Karagosian & Case Concrete Model from LS-DYNA were all inserted into a standard continuum finite element grid simulation. The Lattice Discrete Particle Method was also used in several forms, including one that homogenized the effects of the fibers into the constitutive model and another that explicitly modeled the fibers and discretely inserted their contribution into the vector constitutive equations only at specific locations where a fiber existed. Extensive characterization data has been developed for the FRC material examined in this study in the form of results from stress and strain path tests, fiber pullout experiments, and third point bending tests.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2010
- Accession Number
- ADA560525
Entities
People
- James O'daniel
Organizations
- United States Army Corps of Engineers