Stress concentration in the region of a rec tangular hole on the side surface of a nonlinearly elastic orthotropic conical shell

Storozhuk, E. À.; Maksimyuk, V. A.; Chernyshenko, I. S.

doi:10.15407/dopovidi2019.11.041

Dopov. Nac. akad. nauk Ukr.

2019

DOI: 10.15407/dopovidi2019.11.041

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Stress concentration in the region of a rec tangular hole on the side surface of a nonlinearly elastic orthotropic conical shell

E. À. Storozhuk¹,

V. A. Maksimyuk²,

I. S. Chernyshenko³

Abstract: Конічні оболонки використовуються при проектуванні корпусів ракет (головний обтічник, міжступеневий і хвостовий відсіки), доменних печей (кожух купола корпуса), телевізійних веж (опора) тощо. Досить часто з конструктивних або технологічних міркувань такі оболонки мають отвори і вирізи різноманітної форми. Значна частина результатів з вивчення концентрації напружень біля отворів в конічних оболонках, виготовлених з металевих і композитних матеріалів, отримана на основі розв'язання лінійно-пружних задач і найбіл… Show more

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Cited by 2 publications

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Computer simulation of the effect of annular inclusions on the stress concentra-tion in thin-walled cylindrical and conical shells with circular openings

Hart,

Semencha

2023

Teh. Meh.

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Shell structures are used in various industries, such the aerospace industry, the oil and gas industry, power engineering, mechanical engineering, construction, etc. Due to their design or manufacturing features, their integrity may be disrupted by the presence of various openings, around which local stresses develop. Finding ways to reduce stress concentrations around openings is an important problem in deformable solid mechanics. This paper presents the results of a computer simulation and a finite-element analysis of the stress and strain field of thin-walled cylindrical and truncated conical shells with circular openings in the presence of annular inclusions around them made of a material whose properties differ from the main material of the shells. The effect of the elastic modulus of an inclusion and its geometric parameters on the stress and strain concentration in the vicinity of the openings was studied. Several inclusion materials and inclusion widths were considered. An annular inclusion made of a homogeneous material and located in the shell plane was considered. Stress and strain intensity distributions in the local stress concentration zones were calculated. A comparative analysis of the results obtained for cylindrical and conical shells was carried out. The study showed that the presence of a “soft” homogeneous annular inclusion makes it possible to reduce the stress concentration around the opening by ~13–35% depending on the inclusion width and elastic modulus both for a cylindrical and a conical shell. Certain combinations of the geometric and mechanical parameters of the inclusion give rise to a “mechanical” effect, which consists in shifting the stress concentration zone from the opening edge to the inclusion – shell material interface. For conical shells, due to their geometric features, a “conical” effect occurs: the stresses increase not only in the vicinity of the opening-weakened zone, but also near the cone basis.

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Computer simulation of the effect of annular inclusions on the stress concentra-tion in thin-walled cylindrical and conical shells with circular openings

Hart,

Semencha

2023

Teh. Meh.

View full text Add to dashboard Cite

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Numerical analysis of the effect of tape inclusions on the stress concentration in thin cylindrical and conical shells with rectangular openings

Hart,

Semencha

2024

Teh. Meh.

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Thin-walled plate-shell structures are widely used in various branches of technology and the national economy, in particular in the aerospace industry, the oil and gas industry, power engineering, construction, etc. The continuity of such structures is often disrupted by various inhomogeneities in the form of openings, inclusions, recesses, cracks, etc., which are local stress concentrators. Reducing the concentration of the stresses that develop in the vicinity of such structural inhomogeneities is an important problem in deformable solid mechanics. In particular, a pressing problem in the design of new equipment in modern mechanical engineering is a significant reduction in material consumption and an increase in the service life of cast parts taking into account the use of new materials and technologies. Such parts are responsible for the competitiveness of new equipment for various industries. This paper presents the results of a numerical simulation and analysis of the stress and strain field of thin-walled cylindrical and truncated conical shells with rectangular openings and tape inclusions around them. The material of the inclusions has properties that differ from those of the base material of the shells. The effect of the geometrical and mechanical characteristics of the inclusions on the parameters of the stress and strain field in the vicinity of the openings was studied by varying the elastic modulus of the inclusion material and the inclusion width. For definiteness, the inclusions were assumed to be homogeneous and located in the shell plane. The stress and strain intensity distributions in the zones of local stress concentration were obtained. The numerical results for shells of both shapes were compared with the corresponding results for shells with a circular opening. The study showed that the presence of a “soft” homogeneous tape inclusion helps in reducing the stress concentration around rectangular openings by ~ (21 – 54) % depending on the width of the inclusion and its elastic modulus, both in cylindrical and in conical shells. Unlike shells with a circular opening, in this case the presence of inclusions does not cause the mechanical effect of shifting the stress concentration zone from the contour of the opening to the interface between the materials.

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Stress concentration in the region of a rec tangular hole on the side surface of a nonlinearly elastic orthotropic conical shell

Cited by 2 publications

References 6 publications

Computer simulation of the effect of annular inclusions on the stress concentra-tion in thin-walled cylindrical and conical shells with circular openings

Computer simulation of the effect of annular inclusions on the stress concentra-tion in thin-walled cylindrical and conical shells with circular openings

Numerical analysis of the effect of tape inclusions on the stress concentration in thin cylindrical and conical shells with rectangular openings

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