In steel structures, a lot of attention is paid to lightweight i.e. reduction dead load without compromising structural safety, integrity and performance. Thanks modern aluminium foam sandwich panel manufacturing technology new possibility became available for design. Assessment understanding the behaviour this under in-plane compression or flexure crucial before its application in structures. ...

A cograph is a graph without induced P4 (where P4 denotes an induced path with 4 vertices). A graph G is (k, `) if its vertex set can be partitioned into at most k independent sets and ` cliques. Threshold graphs are cographs-(1, 1). Cographs-(2, 1) are a generalization of threshold graphs and, as threshold graphs, they can be recognized in linear time. GRAPH SANDWICH PROBLEMS FOR PROPERTY Π (Π...

The present research deals with the flexural-torsional buckling analysis of sandwich web and/or flanges tapered doubly-symmetric I-beam. All section walls are composed of two metal face layers and a functionally graded (FG) porous core. It is assumed that the material properties of the porous core vary gradually in the longitudinal direction according to the simple power-law function considerin...

An elasticity solution is obtained for a sandwich beam with a functionally graded core subjected to transverse loads. The sandwich is subdivided into four elements, the top and bottom face-sheets, and top and bottom halves of the sandwich core. Euler-Bernoulli beam theory is used to model the face-sheets and plane elasticity equations are used to analyze the core. The Young’s modulus of the cor...

The advanced Automated Fibre Placement (AFP) manufacturing technologies make the synthesis of Variable Angle Tow (VAT) composites, which enable design lightweight sandwich structures to possess variable stiffness facesheets. However, both global and local instability phenomena VAT plates under in-plane compressive loads are rarely explored till now. objective this article is fill gap by develop...

The aim of this work is to evaluate the influence of fabrication methods on the com-pressive properties of sandwich composites using both experimental work and numerical simulations. Two types of sandwich composites with E-glass/Kevlar/polyester resin facings and End-grain balsa wood as core have been produced by vacuum infusion processing (VIP) and hand-lay up (HL) method. Compression tests on...

The accuracy of the Hartree-Fock method with an empirical dispersion correction, HF-D3, to model interaction energies and locate constrained minimum geometries is tested against more conventional correlation methods, such as second-order perturbation theory and coupled cluster theory, and against the sophisticated effective fragment potential model. HF-D3 was applied to substituted-benzene dime...