Simulation of the thermal state of the workpiece made of polymer-matrix composites using microwave radiation

Prosuntsov, P. V.; Резник, С. В.; Polsky, Pavel

doi:10.1051/itmconf/20193012007

Cited by 1 publication

(2 citation statements)

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“…During the microwave curing simulation the following physical processes were considered: propagation of electromagnetic radiation in the volume of the operating area, absorption of the radiation in the workpiece with volumetric heat generation, liquid-solid transition of the matrix in the workpiece, volumetric heat generation in the workpiece due to the proceeding of exothermic process of matrix curing, conductive and radiation heat exchange in the workpiece between non-uniformly heated workpiece surfaces and the walls of the operating area [12,17]. The physical model of the propagation of an electromagnetic wave was based on the next assumptions: metal walls of the chamber have high values of electrical conductivity and fully reflect the electromagnetic wave; the magnetron is a rectangular port (10mm х 20mm) that propagates an electromagnetic wave perpendicular to the surface; there is no reflection of the electromagnetic wave at the boundary surface between the internal volume of the operating area (air) and the PMC.…”

Section: The Mathematical Model Of the Curingmentioning

confidence: 99%

“…Traditionally, in order to equalize the temperature throughout a workpiece, it is rotated about one of the axes (about the central axis in case the detail is cylindrical). However, this approach poses new challenges, such as rotating a larger workpiece together with the mount, fixing the vacuum bag and supplying flexible vacuum hoses [9][10][11][12][13]. One possible solution to this issue may lie in readjusting the unit, so that the workpiece will remain stationary, and the uniformity of heating will be achieved due to creating traveling waves in the operating area of the unit.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of the curing of composite materials using microwave radiation with control of individual magnetrons

Galaeva

Prosuntsov²

2023

E3S Web of Conf.

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The traditional approach to the organization of the technological process of curing a binder polymer using microwave radiation is to rotate a workpiece around one axes in order to reduce the non-uniformity of its heating. Nevertheless, using this technical solution might lead to considerable difficulties when rotating larger workpieces, creating desired pressure on their surfaces and diagnosing the process. The approach suggesting that the workpiece itself remains stationary while the uniformity of its heating is achieved by creating a traveling electromagnetic wave in the operating area is to be considered a more promising direction in the development of curing technology. However, creating such a wave would require constructing a new and rather complex scheme for individual control of magnetrons, the theory of which has not been developed yet. The present work offers such a scheme of individual control and shows that using it allows to reduce the non-uniformity of the temperature field in a workpiece made of a polymer composite material with the maximum deviation of no more than 60 K, whereas the level of non-uniformity in the central part of the workpiece is not higher than 21 K.

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Section: The Mathematical Model Of the Curingmentioning

confidence: 99%