The problem of creep rupture of pipes from an anisotropic material is studied. The authors suggest a method describing the results of creep rupture tests on thin-walled pipes under complex stress state by taking the strength anisotropy of material into account. A coefficient of strength anisotropy has been determined from the results of creep rupture testing, and a method is given for calculation under various modes of complex stress state. This procedure is based on evaluating the values of the statistical spread from the experimental data. The anisotropy coefficient corresponding to the minimum spread is adopted. The suggested method of calculating the strength anisotropy coefficient is confirmed experimentally.
Issue Section:
Research Papers
1.
Johnson
A. E.
Henderson
J.
Mathur
V. D.
1956
, “Combined Stress Creep Fracture of Commercial Copper at 250°C, Part 1
,” The Engineer
, Vol. 202
, No. 5248
, pp. 262
–265
.2.
Lebedev, A. A., 1965, “Experimental Investigation of Creep Rupture Chromium-Nickel Steel in Conditions of Biaxial Tension,” Thermoprotchnost materialov i constructsionnyh elementov (Thermo-Strength of Materials and Constructional Elements), (in Russian), G. S. Pisarenko ed., Naukova Dumka, Kiev, Russia, pp. 77–83.
3.
Lokochtchenko, A. M., 1983, “Determining of the Anisotropy in Investigations of Creep Rupture Under Conditions of Plane Stress State,” Problemy Prochnosty (Strength of Materials) (in Russian), No. 9, pp. 71–73.
4.
Lokochtchenko, A. M., Mjakotin, E. A., and Shesterikov, S. A., 1979, “Creep and Creep Rupture of X18H10T Steel Under Conditions of Complex Stress State,” Mechanica Twjordogo Tjela (Mechanics of Solids) (in Russian), No. 4, pp. 87–94.
5.
Mjakotin, E. A., 1981, “Use of Criterion σ1 in Evaluation of Creep Rupture for Structural Steels under Plane Stress State,” Problemy Prochnosty (Strength of Materials) (in Russian), No. 2, 1981, pp. 5–10.
6.
Sdobyrev, V. P., 1959, “Criterion of Creep Rupture for Some High-Temperature Alloys Under Complex Stress State,” Bulletin of Science Academie of USSR, Section of Technical Science (in Russian), No. 6, pp. 93–99.
7.
Trunin, I. I., 1963, “Evaluating the Resistance to Long-Term Fracture and Some Features of Deforming Under Complex Stress State,” Journal of Applied Mechanics and Technical Physics (in Russian), No. 1, pp. 110–114.
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