Kinetics of fiber impregnation by a binder. Gradient generalization of Navier–Stokes–Darcy equations

The results of a study of the effect of storage conditions of dispersed fillers widely used in the repair of machines (mica, boron nitride, aluminum powder, carbon-containing powder) on the properties of composites based on them are presented. The results of the microstructure of the samples after exposure of the fillers under standard storage conditions, as well as high air humidity and a temperature drop, are presented.

Section: Main Partmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of the influence of storage conditions of dispersed fillers on the properties of composites based on them

Mukhin

Volchenkova²

2023

“…E3S Web of Conferences 376, 01017 (2023) https://doi.org/10.1051/e3sconf/202337601017 ERSME-2023 Composite materials have high values of specific strength and rigidity, fatigue life, can be operated in a wide temperature range, have a low temperature coefficient of linear expansion, and also have a relatively low density, which greatly expands the technological possibilities of their application [1][2][3][4] and, therefore, the use of composite materials. materials becomes one of the most important factors determining the competitiveness of manufactured products [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the stress-strain state of machine structural elements made of polymer composite materials with a hybrid matrix by numerical simulation

Kosenko

Nelyub²,

Зорин³

2023

The expansion of the fields of application of polymer composite materials (PCM) requires the development of their new compositions, structures, and molding methods. One of the most difficult tasks in the design of PCM products is the selection or development of a polymer matrix that meets a number of technological and operational requirements. The addition of components forming an independent conditionally liquid phase to the composition of the PCM matrix makes it possible to change the set of properties of the composite and ensure its high crack resistance. The paper presents the results of evaluating the stress-strain state of model samples of carbon fiber reinforced plastic with an organosilicon polymer material that forms a hybrid matrix with the base material of the binder. Modeling was carried out for cases of using organosilicon material with low and high modulus of elasticity. Also, modeling of a front-end loader bucket made using carbon fiber with the considered hybrid matrix was performed. The simulation results showed that the use of PCM with organosilicon material in the manufacture of a product can significantly reduce its weight and provide a sufficient margin of safety.

“…At present, polymeric materials are widely used to improve the properties of non-metallic elements at negative temperatures [4][5][6][7], for which special theoretical and experimental methods have been developed to assess their performance under given operating conditions [8][9][10][11][12]. On the basis of tests carried out earlier it was established that the use of impregnating materials allows to obtain properties of rubber at -50 о С, similar to the characteristics of this material at -30 о С [1].…”

Section: Introductionmentioning

confidence: 99%

Virtual calculations for analyzing the operation of air spring

Marenkov

Baurova²

2023

The 3D-model of an air spring for road vehicles is presented. A virtual calculation of the air spring has been carried out. Calculation results have been analyzed for adequacy by investigating grid deformation and checking pressure inside the rubber part of the air spring. The most dangerous places of the air spring are shown. Possibilities of LS-Dyna software package for engineering analysis are demonstrated. The influence of computer-aided design systems on modern engineering solutions is considered.