Ultimate uniaxial compressive strength of stiffened panel with opening under lateral pressure

Abstract

This paper concentrated on the ultimate uniaxial compressive strength of stiffened panel with opening under lateral load and also studied the design-oriented formulae. For this purpose, three series of well executed experiments on longitudinal stiffened panel with rectangular opening subjected to the combined load have been selected as test models. The finite element analysis package, ABAQUS, is used for simulation with considering the large elasticplastic deflection behavior of stiffened panels. The feasibility of the numerical procedure is verified by a good agreement of experimental results and numerical results. More cases studies are executed employing nonlinear finite element method to analyze the influence of design variables on the ultimate strength of stiffened panel with opening under combined pressure. Based on data, two design formulae corresponding to different opening types are fitted, and accuracy of them is illustrated to demonstrate that they could be applied to basic design of practical engineering structure.

Computational Model Verification and Validation of Elastoplastic Buckling Due to Combined Loads of Thin Plates

“…Therefore, this element size was adopted for the spatial discretization of all simulated configurations. The results obtained in the present study and those found by Yu et al [28] are shown in Table 8. The results of Table 8 presented relative differences ranging from 2.71% to 4.51%, ensuring that the proposed computational model can be considered verified.…”

“…To finish the computational model verification step, the numerical study carried out by Yu et al [28] was reproduced here. To do so, the elastoplastic buckling of a simply supported rectangular stiffened plate with a square centered hole was analyzed, being the structure under uniaxial compression combined with uniform lateral loading.…”

“…The metallic material used for the plate and stiffeners has the following mechanical properties: E = 198 GPa, ν = 0.3, and σ Y = 331 MPa. It is worth mentioning that the magnitudes of the lateral load considered in this case were 𝑄 = 2𝑞 𝑢 /3 and 5𝑞 𝑢 /6, where 𝑞 𝑢 is the ultimate lateral load of the specimen (which is 341.3 MPa), as presented in Yu et al [28]. In addition, the ultimate normalized stress (defined as 𝜎 𝑛 = 𝜎 𝑢 /𝜎 𝑌 ) was adopted for the evaluation of the results.…”

Computational model verification and numerical analysis of plate buckling due to combined loading

“…The present work proposed a computational model to numerically simulate the elasto-plastic buckling of plates due to combined loads, developed using the finite element method in ANSYS® software. The computational model was verified against the works of Kumar, Alagusundaramoorthy and Sundaravadivelu (2009) and Yu, Feng and Chen (2015), with a difference of less than 5% in both comparisons, verifying the proposed model.…”

“…Feng and Chen ( 2015) can be seen in Table 2. From Table 2, one can note that the maximum absolute difference is less than 5% compared to Yu, Feng and Chen (2015), verifying the proposed computational model.…”