The nominal stresses determined from the tensile test (*) and those generated by FEM simulation (*) are plotted with respect to cross-head displacement in Fig.
Typical stress-strain curves for 2% agarose at cross-head speeds of 1, 10, and 100 mm/min are shown in Fig.
The nominal stress at which visible water flow started is plotted against cross-head speed in Fig.
12 illustrates that water flow started at a lower stress level when the cross-head speed was lower, presumably allowing more time for water flow prior to failure at lower speeds and resulting in greater loss of water as a percentage of total specimen mass.
We have applied all the necessary technological steps on the finished part design shown in figure 1, and we have obtained the final shape of the cross-head
body, as shown in figure 6.
The variations with draw time of the nominal stress and the true strain at a cross-head speed of 0.
Looking at the effect of the cross-head speed decrease on EB-2 [ILLUSTRATION FOR FIGURE 4B OMITTED] discloses a drop of [approximately]25% of the nominal yield stress and a smoothing of the true strain variation with time.
This contrasts with the data at the cross-head speed of 5 mm/min [ILLUSTRATION FOR FIGURES 3A AND 3C OMITTED], which showed only minor differences between the two copolymers.
In addition, it is worth mentioning that this latter resembles qualitatively EO-1 at the same cross-head speed [ILLUSTRATION FOR FIGURE 5A OMITTED].
The variations with draw time of the nominal stress and the true strain at a draw temperature of 60 [degrees] C and a cross-head speed of 5 mm/min are reported in Fig.
However, the actual yield stress is about the same for the two copolymers, at room temperature for the cross-head speed of 5 mm/min [ILLUSTRATION FOR FIGURE 3 OMITTED].
On a lovely sunny day, we were able to find one of very few medieval cross-heads
left standing anywhere in Wales.