#### Description:

Graphical representation of Mohr-Coulomb plasticity surface in principal stress spaceWhat can be modified:

- cohesion,
*c* - internal friction angle,
*φ*: - the choice of displayed elements - it si possible to show or hide
- section corresponding to plastically admissible area for plane stress,
- axes corresponding to principal stresses,
- hydrostatic axis,
- plasticity surface itself.

**Notice:**

- View direction on the 3D picture can be modified with mouse (placing cursor on the picture, drag and drop).
- It is also possible to choose a predefined view:
- parallel to one principal stress axis (button "|| σ3"),
- perpendicular to hydrostatic axis (button "⟂ (σ1=σ2=σ3)"),
- parallel to hydrostatic axis (button "|| (σ1=σ2=σ3)").
- Mohr-Coulomb plasticity surface is a hxagonal pyramid with the top on hydrostatic axis.
- The section corresponding to plane stress results in hexagon with one axis of symmetry.
- The deviatoric section results in (non-regular) hexagon with three axes of symmetry.
- While modifying cohesion, the pyramid is translated along hydrostatic axis.
- While modifying internal friction angle, the top angle of the pyramid is changed.
- For zero internal friction angle, the pyramid transfers to prism corresponding to Tresca plasticity surface.

Contact: jan.stransky(at)fsv.cvut.cz

Last update: 25th September 2018

Last update: 25th September 2018

© 2011 - 2018 Jan Stránský

All rights reserved

All rights reserved