MATHEMATICAL MODELING OF HIGH-ENERGY PRESSING PROCESS OF GRAPHITE-PLASTIC COMPOSITION
DOI:
https://doi.org/10.14529/met180413Keywords:
graphite-plastic composition, the pressing force, energy of pressing, modellingAbstract
For the process of high-energy pressing of the graphite-plastic composition and determination of pressure, the interaction of the particles of the mixture with each other, as well as their influence on the compaction process is considered.
Regularities are revealed and epyuri of cantata interaction are plotted and the magnitude of external force acting across the entire contact surface is determined.
The changes in the specific forces acting on the contact surfaces between the hard and soft components of the composition during the pressing process are considered.
The known methods of pressure estimation during pressing are analyzed, their disadvantages for the proposed composition “graphite + resin” are revealed. A method of modeling the process of pressing is built, according to the rheological characteristics of the material of the composition.
The methods for solving the problem of filling the soft component of the space between the solid components of the mixture are determined. Schemes of possible compaction of the mixture particles are given and equations are derived that allow one to determine the required pressure for a graphitoplast composition with different configurations.
A diagram of the formation of a contact surface when introducing a solid into the soft component of the composition is presented. The main factors are identified and the coefficients affecting the compaction process are established.
The process of pressing a graphitoplast composition was simulated using the methods of the theory of plasticity. To solve a three-dimensional problem, a method of superposition of processes in two mutually perpendicular planes is applied. The process of pressing a graphitoplast composition is conventionally divided into two stages. The assumptions that lie in the approximation of the real shape of the contacting surfaces by simplified geometric forms: ball, cylindrical, hyperbolic, hyperboloid of rotation, parabolic, elliptic, etc. are determined.
Mathematical dependences are obtained to determine the pressure that is realized when a solid component is introduced into the soft component and when the space between the solid components is soft. An assessment of the energy intensity of the high-energy process of pressing the graphiteplastic composition is given.
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