Shakedown analysis of a reusable space capsule

Progress in Lightweight Design Methods for Large-Size Panel Structures in Manned Pressurized Capsules

“…From the definition, it can be seen that shakedown theory can analyze and evaluate the ultimate load that a structure with plastic deformation can withstand. Therefore, based on the shakedown theory, conducting structural shakedown analysis can evaluate the feasibility and load-bearing safety of the pressurized capsule structure allowing local plastic deformation [23][24][25][26][27][28][29][29][30][31][32][33][34][35][36].…”

“…(1) Shakedown analysis of pressurized capsule structure [23][24][25][26][27][28][29][29][30][31][32][33][34][35][36] The finite element solid model of the large pressurized capsule structure is large in scale, and the shakedown analysis is difficult to be carried out directly in the solid model because the number of independent variables and constraints is above one million levels and the solution time is long and the calculation amount is huge. Since the structure of the pressurized capsule and the load are symmetrical, the axisymmetric model can be used for the shakedown analysis.…”

“…Therefore, experimental testing will be conducted at the calculated load of 0.2765 MPa. In the study of [36], the research object was a pressurized capsule of reduced size. Firstly, the plastic dissipation of the structure gradually converged after 10 times of shakedown limit cyclic loading through the shakedown analysis (as shown in Figure 11a).…”