Mechanics of Solids最新文献

Dual-Scale Optimization Design and Performance Analysis of Aircraft Rudder Structure

IF 0.6 4区工程技术

Mechanics of Solids Pub Date : 2025-03-22 DOI: 10.1134/S0025654424605986

Zhang Wu, Wei Liu, Yijiao Chen

{"title":"Dual-Scale Optimization Design and Performance Analysis of Aircraft Rudder Structure","authors":"Zhang Wu, Wei Liu, Yijiao Chen","doi":"10.1134/S0025654424605986","DOIUrl":"10.1134/S0025654424605986","url":null,"abstract":"This paper focuses on the performance optimization of the control surfaces of aircraft. A two-scale optimization design method to enhance the mechanical properties of the control surfaces is proposed. Firstly, the topology optimization of the control surface structure is carried out to find the main load-bearing areas. Secondly, the periodic microstructure with the optimal stiffness is designed by joint optimization. After the above work is completed, the optimization results of the first step are reconstructed for the convenience of design and manufacturing. The periodic microstructures optimized in the second step are selectively filled according to the areas with concentrated material density, so as to obtain the configuration of the two-scale topology optimization design. By analyzing several structures, the obtained configuration is compared with the single-optimization configuration, the filled configuration and the traditional configuration respectively. The mechanical properties of the two-scale configuration are significantly improved under the premise of equivalent mass. Therefore, the numerical example results prove the effectiveness of the two-scale design combining macro and micro structure optimization.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"59 8","pages":"4085 - 4099"},"PeriodicalIF":0.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum to: Precession Motions of a Gyrostat, Having a Fixed Point, in Three Homogeneous Force Fields

IF 0.6 4区工程技术

Mechanics of Solids Pub Date : 2025-03-22 DOI: 10.1134/S0025654424080016

G. V. Gorr

引用次数: 0

One-dimensional Solution of Hygrothermoelastic Rod Problem by Laplace Transformation

IF 0.6 4区工程技术

Mechanics of Solids Pub Date : 2025-03-22 DOI: 10.1134/S0025654424606268

Praveen Ailawalia, Ibrahim S. Elshazly, Borhen Halouani, Harshit Tyagi, E. S. Elidy, Khaled Lotfy

引用次数: 0

Analyses of Crack Propagation under Thermo-Mechanical Coupling Conditions in Typical Small-Caliber Gun Barrels

IF 0.6 4区工程技术

Mechanics of Solids Pub Date : 2025-03-22 DOI: 10.1134/S0025654424605445

Ning Wang, Yongjuan Wang, Cheng Xu, Lixia Fan, Jun Xue

{"title":"Analyses of Crack Propagation under Thermo-Mechanical Coupling Conditions in Typical Small-Caliber Gun Barrels","authors":"Ning Wang, Yongjuan Wang, Cheng Xu, Lixia Fan, Jun Xue","doi":"10.1134/S0025654424605445","DOIUrl":"10.1134/S0025654424605445","url":null,"abstract":"This study investigates the propagation pattern of barrel matrix cracks by analyzing the morphology and dimensions of radial cracks in barrels at different stages of life. A finite element numerical model was established for a chrome-plated barrel with an internal radial crack under thermal load, gas pressure load, and coupled load effects, capturing the stress response at the crack tip within the barrel bore under cracked conditions. Incorporating the results of crack morphology analysis, a relationship between the internal crack size and the number of projectiles fired was established, and an empirical model for crack propagation was developed. The critical crack size and the crack expansion life of the barrel at the dangerous cross-section were analyzed and compared. The results indicate that the most hazardous location of the barrel is at the rear part, which is subjected to high gas loads and has a thinner wall thickness. When the maximum chamber pressure exceeds 450 MPa, the theoretical safe service life of the barrel has decreased to a level comparable to the life required to maintain ballistic accuracy, at which point the safety of the barrel can no longer be assured.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"59 8","pages":"4051 - 4065"},"PeriodicalIF":0.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling and Analyzing New External Periodic Supports for Vibration Control over a Wide Frequency Range Starting from Zero Frequency 建模和分析用于从零频率开始的宽频率范围振动控制的新型外部周期支撑件

IF 0.6 4区工程技术

Mechanics of Solids Pub Date : 2025-03-22 DOI: 10.1134/S0025654424606475

Mohammad Hajhosseini

{"title":"Modeling and Analyzing New External Periodic Supports for Vibration Control over a Wide Frequency Range Starting from Zero Frequency","authors":"Mohammad Hajhosseini","doi":"10.1134/S0025654424606475","DOIUrl":"10.1134/S0025654424606475","url":null,"abstract":"In this research, a new type of external periodic supports is proposed and analyzed for vibration control in the main structure. These supports are connected beams with different lengths and boundary conditions periodically attached to the main structure. The Bloch theory combined with the generalized differential quadrature rule (GDQR) method is implemented to obtain the vibration band gaps. The impacts of the supports geometry on the first three bands are studied. Results indicate that the starting frequency of first band is zero for all supports geometries. Results also indicate that there are specific supports geometries in which the first and second bands or all three bands are attached to each other. Forced vibration responses obtained via ANSYS show that strong vibration attenuation occurs over the band gaps. All these results indicate that these new supports can be designed to strongly absorb the vibration waves in the main structure over a very wide frequency interval starting from zero frequency. The proposed periodic supports are suggested to be used for vibration control in the structures such as fluid-conveying pipes in practical applications. The forced responses implemented for verification of the GDQR indicates that vibration of the structures made of connected elements can be analyzed accurately and robustly using the GDQR.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"59 8","pages":"4143 - 4156"},"PeriodicalIF":0.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Impact of Two-Temperature and Magnetic Field on Gravitational Piezo-Thermoelastic Medium in the Context of Dual-Phase-Lag Theory

IF 0.6 4区工程技术

Mechanics of Solids Pub Date : 2025-03-22 DOI: 10.1134/S0025654424605433

A. M. Abd-Alla, Mahrous R. Ahmed, S. M. Abo-Dahab, Hanan S. Gafel, S. B. Moeen

{"title":"The Impact of Two-Temperature and Magnetic Field on Gravitational Piezo-Thermoelastic Medium in the Context of Dual-Phase-Lag Theory","authors":"A. M. Abd-Alla, Mahrous R. Ahmed, S. M. Abo-Dahab, Hanan S. Gafel, S. B. Moeen","doi":"10.1134/S0025654424605433","DOIUrl":"10.1134/S0025654424605433","url":null,"abstract":"In the present work, we study the influence of gravity, magnetic field and two-temperature on piezothermoelastic media considering the theory of Dual-phase-Lag “DPL.” The fundamental equations for the problem in the context of the phenomenon parameters and boundary conditions have been formulated. An analytic expressions for the displacement components, stress components, temperature, and the components of strain tensors are investigated using the technique of normal mode. The conditions for the Mechanical and Maxwell’s stresses and the temperature have been taken on the interface of the medium. The obtained results by applying the “DPL” theory are shown to be very close to each other except in determining one of the electric displacement components where the results differ and in general the effect of the presence of two-temperature, gravity, and magnetic field. The results obtained in the context of the new parameters and two theories are calculated analytically and displayed by graphs. A comparison has been made with the previous results obtained by others that show the impact of the new parameters. The theoretical and numerical computations are found to be in close agreement.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"59 8","pages":"4027 - 4050"},"PeriodicalIF":0.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Accounting for Phase Constraints During Intensive Acceleration by Modified Linear Tangent Law

IF 0.6 4区工程技术

Mechanics of Solids Pub Date : 2025-03-22 DOI: 10.1134/S0025654424607043

S. A. Reshmin, M. T. Bektybaeva

引用次数: 0

Numerical Investigation of the Vibroacoustic Behavior of Carbon Nanotube Reinforced Doubly-Curved Multilayer Composite Shells

IF 0.6 4区工程技术

Mechanics of Solids Pub Date : 2025-03-22 DOI: 10.1134/S0025654424605093

Y. Senkoua, F. P. Ewolo Ngak, H. H. Meuyou, G. E. Ntamack

{"title":"Numerical Investigation of the Vibroacoustic Behavior of Carbon Nanotube Reinforced Doubly-Curved Multilayer Composite Shells","authors":"Y. Senkoua, F. P. Ewolo Ngak, H. H. Meuyou, G. E. Ntamack","doi":"10.1134/S0025654424605093","DOIUrl":"10.1134/S0025654424605093","url":null,"abstract":"In this paper, a new approach is suggested to analyze the acoustic transmission of carbon nanotube (CNT)-reinforced doubly-curved multilayer composite shells by a three-dimensional (3D) theory, namely the State–Space Method coupled with the fourth-order Runge–Kutta algorithm (SSM-RK4). The properties of nanocomposite media are studied using the principle of mixing rules, which include a number of productivity parameters. Different CNT distributions have been considered, either homogeneous or functionally graded (FG) in the thickness direction. The state equation is firstly established in the sth layer of the considered structure by coupling the behavior law of structure, the equations of deformation and the movement equations according to the State–Space Methodology. The solution of the state equation in the sth layer is taken in the plane wave form, which has enabled us to transform the latter which a partial derivatives equation into a total derivatives equation. For the resolution, the fourth-order Runge–Kutta algorithm (RK4) is used to obtain the propagation matrix in the sth layer. The propagation of the solution in the structure yielded the overall transfer matrix for the structure. Acoustic boundary conditions were applied to obtain the Sound Transmission Loss (STL). Once the STL has been obtained, various representations are presented to check convergence. Not only the accuracy of this method is confirmed, but its importance is as well demonstrated by the reliability of the results obtained, particularly in the high-frequency range. Then, using this method, the effects of different volume fractions, of different CNT distributions, of ratio (radius/thickness), of incident angle and of geometry on the STL were briefly studied. Our results showed that these parameters have decisive and predominant effects on the acoustic insulation performance of CNT composite shells. Variations in these parameters shift the positions of the curvature and coincidence frequencies.","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":"59 8","pages":"4003 - 4026"},"PeriodicalIF":0.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetothermoelastic Interactions in an Infinite Medium upon Hyperbolic Two-Temperature

IF 0.6 4区工程技术

Mechanics of Solids Pub Date : 2025-03-22 DOI: 10.1134/S0025654424606372

Zuhur Alqahtani, Ibrahim Abbas, Alaa A. El-Bary, Areej Almuneef

引用次数: 0

Yield Locus Evolution at Non-Proportional Loading in Terms of the Synthetic Theory 从合成理论看非比例加载时的屈服点演变

IF 0.6 4区工程技术

Mechanics of Solids Pub Date : 2025-03-22 DOI: 10.1134/S0025654424606256

A. Rusinko

引用次数: 0