Creep analysis of structures using a new equation of state type constitutive relation
A computational scheme is presented for the analysis of a certain class of problems involving creep of metals at elevated temperatures. The high temperature nonelastic behavior of materials is assumed to obey a new mechanical equation of state type constitutive relation recently proposed by Hart. As an illustration, the problem of creep of a closed-ended thick-walled cylinder under internal and external pressures is analyzed employing the proposed computational scheme and Hart's equation of state approach. Results are compared qualitatively with the results of classical strain hardening and time hardening theories of creep and the experimental results obtained earlier by other researchers. The proposed computational scheme is found to be very efficient from the view point of both computational time and effort. In regard to the equation of state approach, it is found that in addition to the general features of these classical creep theories, it is also capable of taking into account the effect of prior deformation history on subsequent creep behavior by simply specifying the initial distribution of a single state variable called hardness. (auth)
- Research Organization:
- Cornell Univ., Ithaca, N.Y. (USA)
- OSTI ID:
- 7199793
- Report Number(s):
- COO-2733-2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Creep analysis of metallic structures in the presence of thermal gradients using newer constitutive relations. Paper No. 76-PVP-30
Inelastic analysis of metallic structures in the presence of thermal gradients using newer constitutive relations