On the issue of designing a beam element of polymer composite materials, considering shock effects
Authors: Astakhov M.V., Slavkina E.V.
Published in issue: #4(100)/2020
DOI: 10.18698/2308-6033-2020-4-1969
Category: Mechanics | Chapter: Mechanics of Deformable Solid Body
The use of articles of polymer composite materials is a widespread way to reduce the weight of the structure and increase its corrosion resistance. One of the main disadvantages of such articles is low resistance to shock loads. The advantages and disadvantages of known methods of increasing the resistance to dynamic loading of parts and assemblies of polymer composite materials are considered. The design of a multilayer adaptive beam element containing an inner layer of elasticviscoplastic dilatant liquid — polysilicon as a layer of variable stiffness increasing the resistance to impact is proposed. Based on laboratory testing followed by statistical processing the results, the mechanical characteristics of polysilicon under shock loading (density, Poisson’s ratio, Young’s modulus, shear modulus) were determined, and dependence of normal stress on relative longitudinal strain is plotted. A method for calculating the strength of an adaptive beam element with an inner layer of polysilicon under impact is proposed.
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