Safety

Use the subnode to set up variables which can be used to check the risk of failure according to various criteria. It can be used in combination with , and . Four different variables describing the failure risk are defined, as described in Table 5-1.

You can add any number of nodes to a single material model. The contents of this feature do not affect the analysis results as such, so you can add nodes after having performed an analysis, and just do an in order to access to the new variables for result evaluation.

Table 5-1: Variables for safety factor evaluation
Variable	Description	Criterion Fulfilled	Criterion violated
Failure index, FI	For a linear criterion, this is the ratio between the computed value and the given limit.	FI<1	FI>1
Damage index, DI	A binary value, indicating whether failure is predicted or not. DI is based on the value of FI.	DI=0	DI=1
Safety factor, SF	For a linear criterion, this is 1/FI.	SF>1	SF<1
Margin of safety, MoS	SF-1	MoS>0	MoS<0

For orthotropic and anisotropic failure criteria, the directions are given by the coordinate system selection in the parent node.


	All other settings for the Safety node are described in the documentation for Safety in the Solid Mechanics interface.

Location in User Interface

Context Menus

Ribbon

Physics tab with or node selected in the model builder tree: