Thin-walled open-profile composite beams under thermo-mechanical loading

Kučera, Pavel; Kondratiev, Andrii; Píštěk, Václav; Taranenko, Igor; Nabokina, Tetyana; Kaplan, Zdeněk

doi:10.1016/j.compstruct.2023.116844

Cited by 2 publications

(3 citation statements)

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“…Deformations of the profiled product. The model for estimating the amount of deformations of a thin-walled composite profile is proposed in [3][4][5]. It makes it possible to obtain dependencies for the component values of the complete deformation of the profile (longitudinal elongation, linear movement in the vertical and horizontal planes, and twisting) on the physical and mechanical characteristics of the materials of the monolayers that make up the CM package.…”

Section: Resultsmentioning

confidence: 99%

“…This is realized by changing the temperature of the medium surrounding the surface of the product. Radiation and other types of exposure are promising [1][2][3][4][5]. It is necessary to know the level of emerging residual stresses or deformations after each stage of the forming process for their practical implementation.…”

Section: Introductionmentioning

confidence: 99%

“…ISSN 2664-9969 of composite materials are considered, and in [2] attention is paid to the study of thermoelastic stresses in laminated composites composites. In [3,4], the behavior of thin-walled composite profiles with an open section under the action of thermomechanical loading is considered. The source [5] offers an approach for determining the stress-strain state of a multilayer composite.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the possibility of undesirable manufacturing heritage reduction in parts made of composites and their joints

Taranenko,

Kupriianova

2024

TAPR

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The object of the research is the possibility of improving the quality of parts made of composites (CM) by means of pre-polymerization treatment of the wet package with intensive pulse loading. The existing technologies for forming parts from CM involve the compaction of the collected impregnated package of reinforcement layers and their subsequent polymerization under the influence of pressure and temperature. As a result of this technology, residual thermal and shrinkage stresses occur in the composite package, which lead to undesirable spatial deformations of profile parts, a violation of monolithicity in the areas of the connection of the composite and metal ends. Using the example of an angular composite profile with a profile with doubler on one of the caps, the residual stress calculation is given and the method of choosing rational angles for stacking the reinforcing material is demonstrated in order to reduce the amount of residual thermal stresses that arise in the composite during its polymerization. The dependence of the twisting parameter of a long-dimensional composite profile of constant cross-section along its axis on the modulus of elasticity and the coefficient of linear temperature expansion is plotted. The work explains the mechanism of the emergence of such harmful technological heredity. The value of the residual deformations was estimated. Based on the analysis of the impregnation process of dry reinforcing material with a binder, the task of increasing the maximum contact area of the binder with fibers is formulated and a possible method of its increase is analyzed. Thus, using the model of capillaries between the fibers of the composite, it is concluded that it is necessary to apply additional pressure to the binder for its deeper advancement between the fibers. Using a synergistic method of combining knowledge from various branches of industry and based on experimental data, a process of pre-polymerization loading of the impregnated package with intense impulse loading (shock waves) is proposed. This process greatly improves the quality of parts of the units produced.

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Section: Resultsmentioning

confidence: 99%