Standards for the stress analysis of thin-walled shell structures in cryogenic engineering

On the selection of allowable stresses in the strength analysis of structures for cryogenic applications

“…In extending the concept implemented in [10,[14][15][16] in order to take into account the uncertainty connected with the jump-wise strain development below 30 K, the parameters of the energy absorption ( ′′ β ) are proposed to be calculated from the lower envelope of the intermittent flow curve [17]. Therefore, in the strength analysis of thin-walled cryogenic structures operating under conditions of deep cooling, the low-temperature hardening is taken into account by introducing the corresponding corrections for values of allowable stresses determined from the strength characteristics of the material at room temperature.…”

“…The violation of the service functions and even the failure of systems can occur upon attaining, by the operating stresses, the level of the onset of the intermittent flow typical of the temperatures < 30 K [5]. The second approach practically implemented in standard documents [14,15] This approach received its further development in [16] wherein the corrections for both the strain [Δσ 1 ] and the low-temperature [Δσ 2 ] hardening are proposed to be taken into account separately with their sum to be added to the value of the allowable stress [σ] determined at room temperature:…”