Abstract
Currently, the question of the best scheme for constructing a mathematical model of a homogeneous anisotropic elastic material equivalent to fiber reinforced plastic composite (FRP) with arbitrary laminate stacking sequence configuration, have been remained open. A new method for the theoretical prediction of anisotropic elastic characteristics of material equivalent to a given FRP is suggested in this paper. Results are obtained for representative volume elemen (RV) which has been cut out in three different ways from FRP. Calculations for a specific FRP have shown that the FRP replacement by a homogeneous anisotropic material equivalent to it leads to an error order 10% for the elastic properties.
Highlights
The problem of fiber reinforced plastic composite (FRP) strength and rigidity calculation is especially important in the design of modern constructions widely used in various engineering fields
Simulation of the FTP mechanical characteristics for various structures [8,9,10,11,12,13,14,15,16,17,18,19] and determination of the FRP effective characteristics of elasticity, which allow the effective methods of the theory of elasticity for anisotropic body to be used to evaluate the stiffness and strength of FRP structures, is more rational [20] in many cases
In accordance with it is assumed that FRP and representative volume element (RV) have equivalent elasticity characteristics under condition for identical deformations the specific potential energies of elastic deformations accumulated in FRP and RV are the same
Summary
The problem of FRP strength and rigidity calculation is especially important in the design of modern constructions widely used in various engineering fields. The experimental method for determining FRP properties is the most reliable [1,2,3,4,5,6,7], but it is very laborious and does not allow determining the mechanical characteristics of all applicable FRP reinforcement schemes. Simulation of the FTP mechanical characteristics for various structures [8,9,10,11,12,13,14,15,16,17,18,19] and determination of the FRP effective characteristics of elasticity, which allow the effective methods of the theory of elasticity for anisotropic body to be used to evaluate the stiffness and strength of FRP structures, is more rational [20] in many cases.
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