Draws the results for a direct shear test

Draws the sigma-tau pairs along with the Mohr-Coulomb failure envelope for a set of direct shear lab test results, and annotates the graph with the values of cohesion and friction angle.

DS_plot(sig.n, tau, units = "kPa")

Arguments

sig.n	A numeric vector of the normal stress values
tau	A numeric vector of the shear stress values
units	A string with the units of the measurements

Value

A ggplot of the direct shear test results

References

Coduto, D. P. (1999). Geotechnical Engineering - Principles and Practices. Prentice Hall.

Holtz, R. D., Kovacs, W. D. & Sheahan, T. C. (2011). An Introduction to Geotechnical Engineering. Prentice Hall.

Gonzalez de Vallejo, L. I. (2004). Ingenieria Geologica. Prentice Hall.

Examples

sig.n = c(80,237,395)
tau = c(127,345,475)
DS_plot(sig.n, tau)