Non-Linear Structural Elements

FLAC3D 9 introduces new non-linear structural elements for ground support for beams and piles/rockbolts and for shells, geogrids, and liners. Simple plastic hinges have been supplemented with a numerical integration scheme.

BEAM-TYPE STRUCTURES

  • The beam-type plastic constitutive models update the internal element forces by integrating the internal stress over the beam volume using a numerical integration scheme.
  • The plasticity is induced by axial and bending deformations; twisting deformation induces an elastic response.
  • The beam may have either a rectangular or circular cross section.
  • Integration points are distributed throughout the volume of the beam elements.
  • There are three beam plastic constitutive models, each of which is a one-dimensional version of the corresponding 3D model used by the zones:
    • von Mises (steel beams)
    • Mohr Coulomb (concrete beams)
    • Strain Softening/Hardening Mohr Coulomb (concrete beams)

The following commands are for an rectangular cross-section aluminum ally beam:

struct beam cmodel assign von-mises

struct beam cmodel plastic-integration rectangular cross-section rectangular layout 3 5 3

struct beam property direction-y (0,1,0) young 68e9 poisson 0.33 strength-yield 270e6 modulus-plastic 0.0; 6061-T6 Al alloy

LEARN MORE

SHELL-TYPE STRUCTURES

  • The plastic constitutive models update the internal element forces by integrating the internal stress over the shell volume using a numerical integration scheme.
  • There are a group of integration points distributed throughout the volume of each shell element.
  • There are three shell plastic constitutive models, each of which is a plane-stress version of the corresponding 3D model used by the zones:
    • von Mises (steel shells)
    • Mohr Coulomb (concrete shells)
    • Strain Softening/Hardening Mohr Coulomb (concrete shells)
  • Plasticity is provided by the DKT, CST and DKT-CST finite elements.

LEARN MORE


Latest News
  • 3DEC 9 Officially Released ITASCA announces the release of 3DEC v9, an advanced three-dimensional, hybrid discontinuum and continuum modeling...
    Read More
  • A Big Hand of Applause for Our 2023 Summer Interns ITASCA Minneapolis would like to extend our sincerest thanks to our 2023 summer interns for...
    Read More
  • Itasca has announced the release of FLAC2D v9 Itasca has announced the release of FLAC2D v9, revolutionizing the way we analyze and predict...
    Read More

Upcoming Events
25 Feb
SME MINEXCHANGE Conference & Expo
SME's annual conference and expo, MINEEXCHANGE, brings together mining and mineral industry professionals to share best practices and i... Read More
13 Mar
Getting Started with 3DEC
Objectives of the training: Understand the 3DEC numerical approach and the types of problems it can solveKnow how to manipulate the 3DE... Read More
8 Apr
3DEC In-Person Introductory Course
Live in-person introductory training course in Minneapolis, Minnesota. This course provides an overview of the capabilities and feature... Read More