ggplot_triaxial_mohrcoulomb: ggplot Mohr-Coulomb failure criterion based on Mohr circles

In GJMeijer/soilmech: R functions and plots for Soil Mechanics teaching

ggplot Mohr-Coulomb failure criterion based on Mohr circles

Description

Plot an drained or undrained mohr-coulomb fit based on measured principal stresses.

Mohr-Coulomb fits are obtained by minimising the sum of square distances between failure surface and Mohr circles

Usage

ggplot_triaxial_mohrcoulomb(
  sig1 = c(75, 120, 160),
  sig3 = c(20, 40, 55),
  drained = TRUE,
  cohesionless = FALSE,
  palette = "Set1",
  nc = 181,
  sig_angle_line = 0.2,
  sig_angle_arrow = 0.18,
  sig_angle_label = 0.19,
  sig_cohesion_arrow = 0.02,
  sig_cohesion_label = 0.03
)

Arguments

sig1	major principal stresses (array)
sig3	minor principal stresses (array)
drained	if 'TRUE', stresses are assumed to be effective, and an cohesional/frictional fit is returned. If 'FALSE', stresses are assumed to be total stresses, and a undrained shear strength fit is returned
cohesionless	if 'TRUE', assume no cohesion when analysing a drained problem
palette	RColorBrewer palette for plotting circles
nc	number of points to use to plot a circle
sig_angle_line	relative x-length of horizontal line for angle plot
sig_angle_arrow	relative x-position of phi arrow
sig_angle_label	relative x-position of phi label
sig_cohesion_arrow	relative x-position of cohesion arrow
sig_cohesion_label	relative x-position of cohesion label

Value

ggplot object

Examples

#drained example - cohesional/frictional
sig1 = c(100, 130, 160)
sig3 = c(50, 70, 85)
ggplot_triaxial_mohrcoulomb(sig1, sig3, drained = TRUE)

#drained example - cohesionless
sig1 = c(100, 130, 160)
sig3 = c(50, 70, 85)
ggplot_triaxial_mohrcoulomb(sig1, sig3, drained = TRUE, cohesionless = TRUE)

#undrained example
sig1 = c(100, 130, 160)
sig3 = c(50, 75, 102)
ggplot_triaxial_mohrcoulomb(sig1, sig3, drained = FALSE)

GJMeijer/soilmech documentation built on May 22, 2022, 10:39 a.m.