Two-scale structural design optimization for the simultaneous design of material and structure, has been a topic of research interest during the last decade. This paper is based on the approach presented in [1] and considers two scales, macro and micro, identified with the design domains of the structure and its material (cellular or composite material), respectively. Structure and material evo...

Recent developments on the optimization and parameter estimation in hybrid active-passive composite sandwich structures are presented. For this purpose, a mixed layerwise finite element model has been formulated, by considering a higher order shear deformation theory to represent the displacement field in the viscoelastic core and a first order theory for the displacement fields of the adjacent...

Isotropic ultra-thin shells or membranes, as well cable–membrane structures, cannot resist loads at the initial state and always require a form-finding process to reach steady state. After this stage, they can work in pure membrane quickly experience large deflection behavior, even with small amplitude of load. This paper aims improve load-carrying capacity strength structures via exploiting ad...

Recently, to further improve the performance of aluminum foam, functionally graded (FG) aluminum foams, whose pore structure varies with their position, have been developed. In this study, three types of FG aluminum foam of aluminum alloy die casting ADC12 with combinations of two different amounts of added blowing agent titanium(II) hydride (TiH₂) powder were fabricated by a friction stir weld...

A method for multiple mode piezoelectric shunt damping will be presented in this paper. The proposed \current owing" shunt controller has a number of bene ts compared to previous shunt damping schemes; it is simpler to implement and requires small number of passive circuit elements. The passive control strategy is validated through experimentation on two piezoelectric laminated structures. c 20...

?18 Composition, &c. Oxalate of lime nucleus, with uric acid and oxalate of lime alternating. Colour, brown and fawn. Structure, laminated. Uric acid nucleus, with uric acid and a little urate of ammonia. Colour, light fawn, Structure, non-laminated, soft. Uric acid throughout. Colour, fawn. Structure, indistinctly laminated. Urate of lime throughout. Colour, grey. Structure, compact, non-lamin...

This work addresses nonlinear finite element analysis of laminated structures with weak interfaces. Considered first are shallow laminated beams subject to arbitrary large displacements, small layer strains and moderate interface slippage. Under these requirements rigorous development of layer-wise kinematic field is performed assuming First order Shear Deformation Theory (FSDT) at the layer le...

Over the past decades, numerous damage diagnosis techniques based on modal flexibility have been studied and developed for various types of structures, but rarely structures made functionally graded (FG) materials. This paper aims to present extensive applicability a sensitivity-based index termed as MFBDI identification FG beams. The formulation this is closed-form sensitivity derived from dir...

The micro-injection upsetting (MIU) experiments of commercially pure aluminium have been conducted on two groups specimens with different grain structures. One group is coarse (CG, undeformed) and the other fine (FG) achieved via 4th pass equal channel angular pressing in micro-meso/scale. were further processed by micro/meso-scale extrusion before conducting MIU for fabricating tiny pins. Micr...

Thermal stress analysis of a thick-walled cylinder reinforced with functionally graded (FG) single-walled carbon nanotubes (SWCNTs) is considered in radial direction. Thick-walled cylinder is subjected to a thermal field. Two layouts of variations in the volume fraction of SWCNTs were considered in the composite cylinder along the radius from inner to outer surface, where their names are increm...