User's manual for PIRAX2, inelastic analysis of 3-dimensional piping systems

Evaluations of the Piping System Inelastic Analysis Computer Program PIRAX2

“…From this data, isochronous stress-creep-strain curves were constructed as shown in Figure 10. Each of these curves can be approximated by Equation (4), except that we have creep-strain, not total strain, hence we do not use the elastic term o/E in Equation (4). Table 1 shows the values of A and n chosen and the t = 10 and t = 500 curves in Figure 10 It can be seen that agreement at 625 hours is good.…”