principals: Calculate principal strains

In abarbour/strain: Tools for working with strainmeter and NOTA borehole data

Calculate principal strains

Description

Strainmeters are generally designed to resemble common strain-gauge rosette configurations to simplify gauge combinations.

Usage

principals(S, ...)

## Default S3 method:
principals(S, B, alpha, is.radians = TRUE, ...)

## S3 method for class 'lsm3'
principals(S, ...)

## S3 method for class 'lsm2'
principals(S, ...)

Arguments

S	strain information
...	additional parameters

Details

If there are only two components of the LSM the angle of maximum shear cannot be solved for.

The calculation is based on 2-D Mohr's circle with the 1-axis being normal and the 2-axis being shear.

Rosette classifications

• BSMT-Delta

• LSM-3Rectangular three-gauge 45^{\circ}, star shaped

• LSM-2Rectangular two-gauge 90^{\circ}

References

Meir, J.H. (19XX),"Strain Rosettes" , in XX, pp. 412, edited by Altamani 19XX

abarbour/strain documentation built on Oct. 13, 2023, 11:44 p.m.