Strength analysis of ship shafts made of polymer composite materials

В работе отмечена актуальность применения ПКМ для перспективных проектов судов при отсутствии инженерных методов расчета параметров НДС таких изделий. Сделана попытка исследования возможностей аналитического и численного подходов для анализа прочностных и жесткостных характеристик судовых валов из ПКМ. Разработана расчетная модель вала в виде цилиндрической оболочки, составленной из пакета нескольких монослоев, каждый из которых сформирован из армирующего волокна и связующей матрицы. Представлены аналитические зависимости для вычисления обобщенных характеристик жесткости оболочки вала и параметров НДС как оболочки в целом, так и ее монослоев. Эти зависимости использованы для расчетного исследования параметров прочности промежуточного вала из ПКМ для танкера химовоза. В процессе исследования варьировалась ориентация и количество монослоев в пакете. Верификация полученных результатов выполнена с помощью расчетных моделей МКЭ. В результате установлено, что аналитические зависимости позволяют получить достоверные результаты параметров НДС композитного тела вала, которые можно уверенно использовать в расчетном проектировании конструкций из ПКМ для анализа плоского напряженно-деформированного состояния оболочки вала. he relevance of the use of PCM for the first projects of ships in the absence of engineering methods for calculating the parameters of the strength of such products is noted. In structural mechanics, there are methods for calculating the strength of multicomponent anisotropic materials, but they are difficult to adapt to engineering methods of verification calculation and design. The article attempts to study the possibilities of analytical and FEM approaches for analyzing the strength and stiffness of ship shafts made of PCM. A model of the shaft consisting of a package of several monolayers. Analytical dependences are presented for calculating the characteristics of the stiffness of the shaft shell. These dependences are used for the computational study of the strength parameters of the intermediate shaft made of PCM for tanker. Verification of the obtained results was carried out using of the FEM. As a result, it is established that the analytical dependences allow us to obtain reliable results of the stress-strain parameters of the composite shaft housing, which can be used in the computational design of PCM structures to analyze the flat stress-strain state of the shaft shell.

FEATURES OF THE STRUCTURE AND REINFORCEMENT TRANSMISSION SHAFTS MADE OF POLYMER COMPOSITE MATERIALS (review)

A transmission shaft is required to transfer power from the engine to the axle and drive wheel in a rear wheel drive vehicle. A composite shaft has many advantages: greater length compared to a metal shaft, improved mechanical properties, less noise, vibration and weight. By adjusting the resin composition and the fiber reinforcement pattern, the mechanical properties of the transmission shaft can be improved. Various options for modifying carbon and fiberglass plastics to improve the characteristics of the shaft are considered.

Incidence of the orientation of the reinforcing fibers in a carbon/epoxy composite shaft, for torsional loads and rotational speed

The study carried out is based on the analysis of the behavior of the angle-ply of a composite shaft, in terms of its resistance to torsional loads and speeds of rotation. For reference, a composite shaft of carbon fiber and an epoxy polymer matrix is optimally designed. The orientations of the laminas in the laminate were selected to ensure their manufacture by the filaments winding method. For the specific case of study, it can be concluded that the pairs of laminas with angles of 45 ° and -45 ° optimally satisfy the design parameters of the shaft. The orientations at 0 ° and 90 °, are useful when the critical speed and torsional buckling are more restrictive.