Find Schmid Factors

Group (Subgroup)

Statistics (Crystallographic)

Description

This Filter calculates the Schmid factor of each Feature given its average orientation and a user defined loading axis. The Schmid Factor is the combination of the component of the axial force F that lies parallel to the slip direction and the component that lies perpendicular to the slip plane. The equation for the Schmid Factor is given as:

Schmid Factor = (cos φ cos λ)

The angle φ is the angle between the tensile axis and the slip plane normal, and λ is the angle between the tensile axis and the slip direction in the slip plane.

The Filter determines the Schmid factor for each Feature by using the above equation for all possible slip systems (given the Feature's crystal structure). The largest Schmid factor from all of the slip systems is stored for the Feature. Only the Schmid factor is used in determining which slip system's Schmid factor to report. The critical resolved shear stress for the different slip systems is not considered.

Parameters

Name Type Description
Loading Direction float (3x) The loading axis for the sample
Store Angle Components of Schmid Factor bool Whether to store the φ and λ for each Feature
Override Default Slip System bool Allows the user to manually input the slip plane and slip direction
Slip Plane float (3x) Vector defining the slip plane normal. Only needed if Override Default Slip System is checked
Slip Direction float (3x) Vector defining the slip direction. Only needed if Override Default Slip System is checked

Required Geometry

Not Applicable

Required Objects

Kind Default Name Type Component Dimensions Description
Feature Attribute Array Phases int32_t (1) Specifies to which Ensemble each Feature belongs
Feature Attribute Array AvgQuats float (4) Specifies the average orienation of each Feature in quaternion representation
Ensemble Attribute Array CrystalStructures uint32_t (1) Enumeration representing the crystal structure for each Ensemble

Created Objects

Kind Default Name Type Component Dimensions Description
Feature Attribute Array Schmids Float (1) Value of the Schmid factor for the most favorably oriented slip system (i.e., the one with the highest Schmid factor)
Feature Attribute Array SlipSystems Int (1) Enumeration of the slip system that has the highest Schmid factor
Feature Attribute Array Poles Ints (3) Specifies the crystallographic pole that points along the user defined loading direction
Feature Attribute Array SchmidPhis Float (1) Angle between tensile axis and slip plane normal. Only created if Store Angle Components of Schmid Factor is checked
Feature Attribute Array SchmidLambdas Float (1) Angle between tensile axis and splid drirection. Only created if Store Angle Components of Schmid Factor is checked

Example Pipelines

  • (05) SmallIN100 Crystallographic Statistics

Please see the description file distributed with this Plugin

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