Whale blubber stress-strain relationship

This is a data frame with elements strain and stress, found by digitizing (accurate to perhaps 1 percent) the curve shown in Figure 2.13 of Raymond (2007). It is used to develop a stress-strain relationship used by parameters(), as shown in “Examples”.

References

Raymond, J. J. "Development of a Numerical Model to Predict Impact Forces on a North Atlantic Right Whale during Collision with a Vessel." University of New Hampshire, 2007. https://scholars.unh.edu/thesis/309/.

Examples

data(raymond2007)
attach(raymond2007)
# Next yields \code{a=1.64e5} Pa and \code{b=2.47}.
m <- nls(stress ~ a * (exp(b * strain) - 1), start = list(a = 1e5, b = 1))
plot(strain, stress, xaxs = "i", yaxs = "i")
x <- seq(0, max(strain), length.out = 100)
lines(x, predict(m, list(strain = x)))