The paper deals with the main aspects of technique for weight optimization design parameters sandwich shell-type composite structures a honeycomb filler. This was implemented in framework comprehensive approach proposed earlier integrated designing assembly units equipment class considered. Multi-parameter problem solved. process divided into several stages accordance reasonable levels signific...

Regular arrays of TixSn11xO2 nanostructures were produced through glancing angle sputter deposition onto self-assembled close-packed arrays of 200-nm-diameter and 1-μm-diameter polystyrene microspheres respectively. The anisotropic nanoflakes grown on 200-nm-diameter polystyrene microspheres exhibited macroscopic-wetting anisotropy, with the apparent contact angle observed parallel to the direc...

A Lamb wave-based damage identification method called damage imaging method for composite shells is presented. A damage index (DI) is generated from the delay matrix of the Lamb wave response signals, and it is used to indicate the location and approximate area of the damage. A piezoelectric actuator is employed to generate the Lamb waves that are subsequently captured by a fiber Bragg grating ...

Abstract Composite cylindrical shells, as key components, are widely employed in large rotating machines. However, due to the frequency bifurcations and dense spectra caused by rotation, nonlinear vibration usually has behavior of complex multiple internal resonances. In addition, varying temperature fields make responses system further difficult obtain. Therefore, resonances composite shells w...

Abstract Structural applications of composite materials are used in various structures the oil and gas industry, water supply sewage systems a wide range industries, such as marine, aerospace, military industries. This paper aims to numerically investigate influence local dent caused by an indenter on buckling behaviour glass fabric-reinforced polymer cylindrical shells when subjected external ...

in this study, the stability problem of a circular orthotropic cylindrical shell under the effect of anaxial compression varying with a power function of time is considered. at first, the modified donnell typedynamic stability and compatibility equations are obtained using love’s shell theory. applying the galerkinmethod and rayleigh-ritz variational techniques to these equations and taking the...

background: marine pollution is a global environmental problem that its monitoring by ideal biomonitors is of great importance. marine organisms, especially mussels, have the ability to accumulate metals from the environment they can be considered as a biomonitoring agent. methods: in this study, concentrations of heavy metals were measured in saccostrea cucullata collected from seven sites on ...

this research was conducted to evaluate the possibility using peanut shells compost as a suitable medium in cultivating ornamental plants. effect of peanut shells composts on the growth of viola tricolor and marigold was investigated during seven months. peat + perlite (with a ratio of 2:1) used as control treatment and peat replaced by 25, 50, 75 and 100 % v/v of peanut shells compost. plant g...