#' @title Longitudinal and transverse velocities from Lame parameters.
#' @description A utility function that converts Lame parameters to longitudinal and transverse velocities.
#' @param density The material density in kg/m3, Default: 4460
#' @param lameLambda The material Lame first parameter in Pa, Default: 70725788000
#' @param lameMu The material Lame second parameter in Pa, Default: 46530734000
#' @return The material density in kg/m3, longitudinal and transverse velocities in m/s as
#' a \code{list} object.
# @details DETAILS
# @examples
# \dontrun{
# if(interactive()){
# #EXAMPLE1
# }
# }
#' @rdname lame2vel
#' @export
lame2vel <- function(density = 4460,
lameLambda = 70.725788000e9,
lameMu = 46.530734000e9) {
## sanity check
if (!is.numeric(density) | (density <= 0)) {
stop("Argument 'density' must be a positive number.")
}
if (!is.numeric(lameLambda) | (lameLambda <= 0)) {
stop("Argument 'lameLambda' must be a positive number.")
}
if (!is.numeric(lameMu) | (lameMu <= 0)) {
stop("Argument 'lameMu' must be a positive number.")
}
## relationships from Disperse User's Manual, p. 181 (version 2.0.20a)
longVelocity <- sqrt((lameLambda + 2*lameMu)/density)
tranVelocity <- sqrt(lameMu/density)
## make output
object <- list(density = density,
longVelocity = longVelocity,
tranVelocity = tranVelocity)
return(object)
}
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.