Abstract
In this work, experimental studies of the effect of fiber curvature on the strength and ultimate deformations of epoxy carbon plastic samples under loading are carried out. On the basis of the experimental studies carried out, the static characteristics of the composite layered material, which are promising for use in the structures under consideration, have been determined. Based on the test results, it was demonstrated that in the design calculations for the products under consideration, it is possible to use static characteristics, since an increase in the deformation rate of the material leads to an increase in strength and, therefore, the calculation results will provide an additional margin of safety.
Highlights
A large number of studies have been carried out to obtain and study the strength of composite materials[1-9]
Figure: 1. Stress-strain diagrams obtained during static compression test of specimens with straight (a) and wavy packing (b)
The maximum load, ultimate strength and ultimate deformation were determined for each specimen
Summary
A large number of studies have been carried out to obtain and study the strength of composite materials[1-9]. A large amount of experimental data dedicated to the synthesis and exploration of heterophase composites were obtained[10-26]. Well-known studies were carried out mainly for the case of quasistatic loading of materials. The effects of strain rate influence on the strength of composites with bent fibers have been studied to a much lesser extent, they have been considered [27-35]. The buckling effects of fibers, even in the case of ideal straight-line packing, leads to a decrease in the compressive strength in relation to the ultimate tensile strength of the fiber composite by more than 1.5 times. The presence of bends in the fibers can reduce this characteristic even more
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