Geometric instability problems in monolithic products made of the carbon-based polymer composites

In the process of manufacturing products from polymer composite materials by high-temperature molding in an autoclave with a reinforcing material of a different chemical and physical nature, they can be subject to geometric instability (warping), which often leads to rejection. As studies have shown, warping can occur not only during high-temperature production of monolithic and multilayer panels for aviation and ground equipment, but also during molding at an ambient temperature of no more than 25 ... 30 ? C (using vacuum infusion technology). With this technology, the amount of warping is significantly less, but to obtain products of a given geometric configuration, it is necessary to take into account all the factors that can lead to its distortion. When switching to new domestic polymer composite materials as part of import substitution, this task becomes even more urgent. Studies of panel samples made of various carbon-based prepregs were conducted. Analysis of the research results showed the main factors causing geometric instability and affecting its value for monolithic panels made of polymer composite materials. The direction along which geometric instability of PCM products manifests itself has been established. Design and technological measures have been defined that will reduce or completely eliminate the said undesirable effect, reduce the time of processing products made of polymer composite materials and, ultimately, reduce the cost of their manufacture.
EDN: RCVIXG, https://elibrary/rcvixg

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