shape_factor: Stress ellipsoid, or 'shape factor'

In abarbour/stress: Tools for Working with Stresses and Focal-mechanism Inversions

Description

Stress ellipsoid, or 'shape factor'

Usage

shape_factor(S1, S2, S3, check.order = TRUE, stress.ratio = FALSE)

Arguments

S1	numeric; the maximum principal stress
S2	numeric; the intermediate principal stress
S3	numeric; the minimum principal stress
check.order	logical; should the order of the stress be checked? If the check fails the indices which caused it to fail will be returned. Set this to FALSE if you want to reduce computation time and are confident in the order of S1, S2, and S3.
stress.ratio	logical; should the stress_ratio be returned instead?

Details

If S1 > S2 > S3 then:

φ = \frac{S2 - S3}{S1 - S3}

which is the parameter returned by SATSI, for example.

Note that the stress_ratio is:

R = 1 - φ = \frac{S1 - S2}{S1 - S3}

abarbour/stress documentation built on Oct. 5, 2019, 11:20 a.m.