Multiscale Finite-Element Modeling of Sandwich Honeycomb Composite Structures

Finite element modeling of integral viscoelastic properties of textile composites

“…In order to calculate the effective viscoelastic characteristics of fibers represented as a 1D composite under harmonic loading, we use the asymptotic averaging method [16,25]. Using a variant of this method proposed in [13], to achieve this goal, it is necessary to consider a series of local problems pq L on the 1/8th periodicity cell (PC)…”

“…Various methods for calculating the viscoelastic properties of composites, mainly for cyclic vibrations, were proposed in [1,2,[9][10][11][12][13]. For such structures, the calculation of creep deformations of composites, which manifests itself over a long period of time, is of great importance.…”

“…In [16], to calculate the viscoelasticity operators of composites, it was proposed to use the method of asymptotic averaging, and to invert these operators, a generalization of the approximation method by A.A. Ilyushin [17]. Various versions of the method for applying the averaging method for calculating the stress-strain state of thin viscoelastic structures were proposed in [18][19][20][21][22].…”

Temperature field calculation with allowance for heat of chemical reactions under electroexplosion nickel plating of aluminum

“…Besides, in such calculations, it is impossible to obtain an adequate solution with the availability of points or lines of stress concentration. The papers [23][24][25] are dedicated to the solution of threedimensional problems. In [23] the quasistatic analysis of multilayered metallic structures based on twodimensional elasticity theory is given.…”

“…As a result it was established that such characteristics of surface relief as high local curvature, notches, coarse particles exert a substantial effect on wear resistance of the materials. In [25] a multiscale model of three-layered honeycomb structures was developed permitting to calculate the effective elastic and strength characteristics of cell fillers and power casings as well as to calculate stress-stained state of structure in the frames of three-dimensional theory of elasticity of inhomogeneous media. Based on three-dimensional finite element modeling it is shown that in four-point bending of three-layered honeycomb plate the maximum values of bending and shear stresses are realized in the zone of load application and action of plate supports, in this case the local stress maximums exceed 'beam' values of bending and shear stresses.…”