No 4 (2016)

This article deals with FGM for cyclic shell structure and the finite element modeling and analysis of functionally graded (FG) shell structures under self-loading. In order to study the influences of important parameters on the responses of FG shell structures, some types of cyclic shells have been considered. The responses obtained for FG shells are based on the analysis; some important results are presented and discussed for thincyclic shells.

Now, the calculation of beams, lying on the solid elastic foundation is fulfilled with us- ing different model of elastic foundation. One of the most common is a model, based on the hypothesis of a proportion betweenthe reaction of the foundation at the point with the coordi- nate x and slump at the same point (the hypothesis of Winkler) which however is not accurate enough describes the behavior of structures lying on the solid elastic foundation. In this paper, we consider the problem of beam vibration, lying on the solid nonlocal elastic foundation. We give a comparison of calculation results, obtained with using the pro- posed model and the Winkler model

The materials presented in the paper can help to young researchers dealing with problems of geometry, theory of thin shells, and their application in building, can point out to the sub- jects of future investigations. It is shown that space structures give rise to the most interest of architects and designers due to highly speed computers and program complexes

We consider two bifurcation problems of stability with respect to high-rise buildings, in- teracting with a deformable base. The effect of "overall stability" is estimated on the stability of the rectilinear shape of the axis high-rise object.

In the article,the simulation of force interaction of tool and workpiece during machining is considered. The calculated dependences for the determination of deformationsof the work- piece material under cutting wedge and the minimum value of the rake angle of the tool are given.

This article presents the results of an experimental study about four soil samples coming from Masse, a region crossed by the East depression of LAMA in the south of Benin, where impor- tant damages have been recorded (rising of thefoundations, deformation and cracking of the infrastructures, tearing of the surface coat of pavements...). In the first stage, a physico- mechanical characterization of the soil samples is achieved bylaboratory tests. The second stage of this study was reserved to the numericalmodeling of the shrinkingby basing on the analysis of the behaviour of the curves obtained at the end of the laboratory odometer tests. This approach allowed us to describe the variation of the indication of the voids ratio accord- ing to the loading pressure, to elaborate a mathematical model permitting to simulate the odometer curve of a loading-discharge cycle and to determine the parameters of compressibil- ity. The results show a good quality of the adjustment. A negligible mistake of the order of 0,3% has been recorded