This paper extends the work on a wrought Nimonic alloy at constant stress and temperature reported in (1) to variable conditions of total load and temperature, and to a casting alloy for high-temperature service, Nimocast PK.24. The observed load redistributions are compared with calculations based on data obtained from constant-stress creep tests. Fully redistributed (steady-state) stresses have been estimated directly from constant-stress creep data and it has been shown that for these materials this method provides a good approximation to the observed fully redistributed stresses.
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References
1.
BarnesJ. F.ClarkeJ. M.CliftonT. E.‘An experiment in stress redistribution caused by creep’, J. Strain Analysis19672, 280.
2.
BerkovitsA.‘Investigation of three analytical hypotheses for determining material creep behaviour under varied loads, with an application to 2024-T3 aluminium alloy sheet in tension at 400°F’, NASA tech. Note TN D-799, 1961.
3.
BarnesJ. F.ClarkeJ. M.‘The significance of creep in cooled gas turbine blades’, Proc. Instn mech. Engrs 1963–1964 178 (Pt 3L), 43.
4.
ClarkeJ. M.‘A convenient representation of creep strain data for problems involving time-varying stresses and temperatures’, Aeronaut. Res. Coun. Current Paper 945, 1967.
5.
ClarkeJ. M.‘An investigation of stress redistribution caused by creep in a thick-walled circular cylinder subjected to axial and thermal loading’, ibid. 1024, 1969.
