The effect of grain boundaries (GB) on the buckling an Al thin film delaminated from its substrate is investigated by means molecular dynamics simulations at finite temperature. It evidenced that GB localizes plasticity and deeply modifies profile buckled through formation a vertical fold location initial GB. Several mechanisms have been also described such as development extrinsic faults or un...

In order to evaluate the reliability of cracked cylindrical shell effectively and reasonably, study load capacity structures understand failure modes structures, in this paper finite element method is adopted for shells with mixed mode crack. The models an inclined through crack under external pressure were established by method, elastic elastic-plastic buckling loads calculated. influences len...

Introducing buckling pattern into straight-walled lattice structure, anovel inspired meta-structure (BILM) was designed and fabricated using polylactic acid (PLA) by three-dimensional (3D) printing technology. The square structure with positive Poisson’s ratio (PPR) is transformed negative (NPR) induction. Curved struts decrease the maximum strain, prohibit strut fracture, increase contact indu...

Abstract This paper presents numerical simulations on the behavior of thin‐walled steel tubular bridge piers box sections under cyclic lateral loading in presence constant axial compression loads, using three‐dimensional finite element analysis adopted commercial computer software ABAQUS. The and experimental results are compared to show how material models, such as elastic perfectly plastic (E...

a comparison between design codes i.e. aci and aisc-lrfd in evaluation of flexural strength of concrete filled steel tubular columns (cfts) is examined. for this purpose an analytical study on the response of cfts under axial-flexural loading is carried using three-dimensional finite elements with elasto-plastic model for concrete with cracking and crushing capability and elastoplastic kinemati...

Frequently, the topologies generated using conventional discrete structural layout optimization methods may be shown to be in unstable equilibrium with the specified applied loading. Instability may occur due to the lack of lateral bracing at a node lying within a line of parallel compression members (or ‘chain’), or at the end of a compression member. In practice, this would typically lead eit...