> Simulation > Checking Stress Results > Failure Criteria > Mohr-Coulomb Stress Criterion
 Print |  Feedback on this topic
Introduction
What's New
User Interface
SolidWorks Fundamentals
Moving from 2D to 3D
Assemblies
CircuitWorks
Configurations
Design Checker
Design Studies in SolidWorks
Detailing and Drawings
DFMXpress
DriveWorksXpress
FloXpress
Import/Export
Mold Design
Motion Studies
Parts and Features
PhotoView 360
PhotoWorks
Routing
Sheet Metal
Simulation
Conventions
Legal Notices
Analysis Background
Simulation Fundamentals
Simulation Interface
Simulation Studies
Composite Shells
Meshing
Material Properties
Design Studies
Parameters
Analysis Library
Viewing Results
Study Reports
Checking Stress Results
Stress Check
Performing Failure Analysis
Failure Criteria
Failure Criteria
Maximum von Mises Stress Criterion
Maximum Shear Stress Criterion
Mohr-Coulomb Stress Criterion
Maximum Normal Stress Criterion
Composite Failure Criteria
Composite Ply Material Directions
Guidelines for Selecting a Failure Criterion
Maximum Stress Criterion
Summary of Failure Criteria
Simulation Options
SimulationXpress
Sketching
Sustainability Products
SolidWorks Utilities
Tolerancing
Toolbox
Weldments
Workgroup PDM
Troubleshooting
Glossary

# Mohr-Coulomb Stress Criterion

The Mohr-Coulomb stress criterion is based on the Mohr-Coulomb theory also known as the Internal Friction theory. This criterion is used for brittle materials with different tensile and compressive properties. Brittle materials do not have a specific yield point and hence it is not recommended to use the yield strength to define the limit stress for this criterion.

This theory predicts failure to occur when:

s1sTensileLimit  if s1 > 0 and s3 > 0

s3  ≥ - sCompressiveLimit  if s1  < 0 and s3 < 0

s1  / sTensileLimit + s3  / -sCompressiveLimit ≥ 1  if s1 ≥ 0 and s3  ≤ 0

The factor of safety is given by:

Factor of Safety (FOS) = {s1 / sTensileLimit + s3  /- sCompressiveLimit} (-1)

### Related Topics

Performing factor of safety check

Related SolidWorks Forum Content

Provide feedback on this topic

* Required

 *Email: Subject: Feedback on Help Topics Page: Mohr-Coulomb Stress Criterion *Comment:
x

We have detected you are using a browser version older than Internet Explorer 7. For optimized display, we suggest upgrading your browser to Internet Explorer 7 or newer.

Never show this message again
x

Web Help Content Version: SolidWorks 2010 SP05

The search functionality within the web help is in a beta test phase and you may experience periodic delays or interruptions in its performance. These are the normal and ordinary features of a beta test and shall not under any circumstances give rise to any liability on the part of DS SolidWorks or its licensors. The topics within the Web-based help are not beta topics; they document SolidWorks 2010 SP05.

To disable Web help from within SolidWorks and use local help instead, click Help > Use SolidWorks Web Help.

To report problems encountered with the Web help interface and search, contact your local support representative. To provide feedback on individual help topics, use the “Feedback on this topic” link on the individual topic page.