Abstract
The paper presents an approach to determining the level of creep deformation and long-term strength of structural elements that operate under conditions of cyclic loading and heating. The method for solving the boundary - initial value problem is described. It is based on the combination of FEM and difference methods of integration for initial problems. The basis of the method is the developed and verified constitutive equations for modeling the cyclic creep-damage processes in the material. The main feature of the method is the transformation of the initial cyclic problem to a new at uniform loading and heating, but with constitutive equations of developed type. The case of the cycle stresses varying in a wide range, including in the conditions where they exceed the yield stress, as well as the case of creep when it is not exceeded by stresses, are considered. The numerical model of double-walled blade is considered and different cyclic creep modes of its operation were analyzed.
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Altenbach, H., Breslavsky, D., Tatarinova, O. (2023). Creep-Damage Processes in Cyclic Loaded Double Walled Structures. In: Altenbach, H., Naumenko, K. (eds) Creep in Structures VI. IUTAM 2023. Advanced Structured Materials, vol 194. Springer, Cham. https://doi.org/10.1007/978-3-031-39070-8_2
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