Impact damages effect assessment on compressive strength of integral panels from polymer composite materials

Bezzametnov, Oleg N.; Mitryaikin, V. I.; Khaliulin, V. I.; Markovtsev, V. A.; Shanygin, Aleksandr N.

doi:10.34759/vst-2021-4-78-91

Cited by 2 publications

(1 citation statement)

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“…В настоящий момент вес и параметры применяемых в изделиях ракетно-космической техники обшивок не учитываются при решении задач их оптимального проектирования [9][10][11][12][13][14][15][16][17], а задача проектирования сводится к оптимизации сетчатых структур, лишенных обшивки, с последующим добавлением обшивки уже исходя из технических или технологических требований. Такое решение вопроса приносит значительный прирост избыточной массы конструкции, а вклад обшивки в запасы прочности и надежности [18][19] и вовсе не учитывается.…”

Section: Introductionunclassified

Solution of the optimization problem for the purpose of designing a lattice polymer composite structure with the outer skin

Skleznev

Chervyakov

Agapov

2022

Naučn. vestn. MGTU GA

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In recent years, the urgency of the problem of launch vehicles load-bearing elements optimal design has continued to grow. One of the widespread structural designs is an anisogrid lattice structure made of polymer composite materials. Such structures are mass-produced and used as load-bearing bodies of space vehicles or fuselage compartments of atmospheric aircraft of advanced structural design. Until now, the weight and parameters of the skins used in products of rocket and space equipment have not been considered when solving optimal design problems, and the design problem has been reduced to optimizing lattice structures without skin. At the same time, the very use of skins for both atmospheric aircraft and load-bearing elements for space applications is a fairly common practice. However, not considering the availability of skin when designing a lattice load-bearing shell can lead to a significant increase in the mass of the structure with skin when applicable. The paper presents a method for the optimal design of lattice structures without ring ribs, but with the metal skin available, which can significantly reduce the weight of such structures, increasing the mass efficiency of products made of polymer composite materials used in aircraft. A confirmation of the results obtained with the help of an analytical solution and the results of a numerical experiment, obtained by modeling using the finite element method, is given. It is expected that the use of the proposed approach by considering the contribution of the skin response can lead to mass saving of the shell anisogrid structure up to 30 % compared with the methods of optimal design of lattice anisogrid structures currently used without considering the availability of skin in the design of the product.

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Section: Introductionunclassified

Solution of the optimization problem for the purpose of designing a lattice polymer composite structure with the outer skin

Skleznev

Chervyakov

Agapov

2022

Naučn. vestn. MGTU GA

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Assessment of the stress state of round and annular cross-section beams made with different tensile and compressive properties materials

Кашелкин

Демидов

Kapustin

2022

S&T

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At present, there is great interest in carbon-based materials. They have high thermomechanical properties and mass characteristics, are quite technologically advanced. Such materials are widely used in aviation and space technology, for example, for the manufacture of load-bearing elements, beams, frames, as well as aircraft and rocket skin elements. The article considers the stress state of bent beams of circular and annular section made of carbon fiber reinforced plastics. When tested in tension and compression, such materials, called multi-modulus, exhibit different properties. Therefore, for strength calculations, it is necessary to use special strength models. A method is proposed for calculating the bending of beams of circular and annular cross-section made of M46 and IMS-65 carbon fiber reinforced plastics. Their tensile and compressive moduli and corresponding strengths were determined by testing on a ZDM-10 machine with an accuracy of ±1,25%. The examples show that in the calculations it is necessary to take into account the difference in tensile and compression properties, as well as the real position of the neutral axis of the bent beam section.

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Impact damages effect assessment on compressive strength of integral panels from polymer composite materials

Cited by 2 publications

References 0 publications

Solution of the optimization problem for the purpose of designing a lattice polymer composite structure with the outer skin

Solution of the optimization problem for the purpose of designing a lattice polymer composite structure with the outer skin

Assessment of the stress state of round and annular cross-section beams made with different tensile and compressive properties materials

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