Applications in engineering science最新文献

{"title":"Modeling and performance analysis of a pneumatic steering system to enhance maneuverability in T-55 Armored Vehicles","authors":"Lemma Nigussie,&nbsp;Kumlachew Yeneneh","doi":"10.1016/j.apples.2025.100232","DOIUrl":"10.1016/j.apples.2025.100232","url":null,"abstract":"<div><div>This study presents the development and analysis of a pneumatic steering mechanism for the T-55 tank, addressing challenges inherent in traditional manual systems. These systems require excessive physical effort due to high resistance in linkages, leading to operator fatigue and reduced maneuverability. The proposed mechanism integrates a pneumatic cylinder and “rocker arm to convert linear motion into precise rotational control, enhancing steering performance and driver comfort. The design leverages compressed air as a lightweight, safe, and responsive medium, ensuring adaptability to diverse operational conditions. Structural analysis via finite element methods (FEA) confirmed the mechanism’s durability, with the rocker arm exhibiting a maximum von Mises stress of 46 MPa, well below the material’s yield strength of 200 MPa. Fatigue analysis further demonstrated the mechanism’s capacity to endure over one million load cycles, ensuring long-term reliability. Dynamic simulations using MSC.ADAMS validated the system’s performance. The piston stroke, ranging from 0 to 150 mm, allowed precise control of steering linkages. Motion analysis confirmed a free travel distance of 132.5 mm, aligning with practical requirements for T-55 steering systems. The pneumatic system also reduced operator effort by over 50% compared to manual systems, significantly improving operational efficiency. Compared to traditional systems, the pneumatic mechanism enhances maneuverability, enabling smooth directional changes in challenging terrains while reducing driver strain. Its modular design facilitates seamless integration with existing tank frameworks, minimizing modifications. This work demonstrates the potential of pneumatic systems to modernize tracked vehicle steering mechanisms, providing enhanced agility, reliability, and safety. The findings ensure that tanks like the T-55 remain highly effective in modern combat scenarios.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"22 ","pages":"Article 100232"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Random vibration study of cold rolling mill excited by different hardness of strip steel","authors":"Weiquan Sun ,&nbsp;Xiaoqiang Yan ,&nbsp;Shen Wang ,&nbsp;Lu Zhang ,&nbsp;Weijing Yun ,&nbsp;Yuchen Chen","doi":"10.1016/j.apples.2025.100213","DOIUrl":"10.1016/j.apples.2025.100213","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Purpose:&lt;/h3&gt;&lt;div&gt;The hardness of individual steel strips demonstrates inherent variability in actual production processes. Systematic hardness testing must be conducted to investigate the distribution patterns of strip hardness. Furthermore, analyzing the random vibration characteristics of cold rolling mill models under varying strip hardness conditions is essential for elucidating the complex vibration mechanisms involved in rolling operations. This investigation offers critical insights into establishing correlations between material properties and dynamic responses in industrial rolling processes.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Methods:&lt;/h3&gt;&lt;div&gt;The surface hardness of the strip was first systematically measured using standardized Vickers testing. Subsequent statistical analysis, employing Gaussian probability distribution principles, verified the hardness measurements’ stochastic characteristics. This probabilistic characterization provided essential load input parameters (PSD data) for the cold rolling mill system’s finite element-based random vibration analysis. The established three-dimensional model was imported into ANSYS Workbench software to construct the framework for the random vibration analysis. Utilizing the modal superposition method, boundary conditions were defined to incorporate the statistical characteristics of strip hardness. Finite element simulations were conducted to resolve the probability density distributions of mill vibration responses under varying strip hardness conditions. Post-processing in MATLAB enabled a quantitative analysis of power spectral density (PSD) responses, establishing correlations between strip surface hardness parameters and dynamic vibration characteristics.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results:&lt;/h3&gt;&lt;div&gt;Surface hardness measurements of the three strips demonstrated significant inter-sample variability. Statistical analysis revealed that while the hardness fluctuations followed Gaussian distribution patterns, notable discrepancies were observed in probability distribution skewness and statistical central tendencies. When the average surface hardness of the strip decreases, the amplitude and overall frequency range of vibrations in the cold continuous rolling mill diminish. However, specific frequencies (35 Hz, 131 Hz, and 246 Hz) still appear alongside an interesting amplitude dynamic where the lower work roll exhibits higher vibration than the upper one. Additionally, a significant positive correlation exists between surface hardness deviation and both vibration amplitude and frequency range, indicating that larger deviations in surface hardness lead to more pronounced vibrations. This relationship highlights the influence of surface properties on the mechanical behavior of the rolling mill during operation.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Conclusion:&lt;/h3&gt;&lt;div&gt;It is of great significance to study the vibration characteristics of the rolling mill and reveal its vibration mechanism, as this research provides insights","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"22 ","pages":"Article 100213"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Axial load induced vibrational changes in nonlocal stress-driven beams","authors":"Indronil Devnath,&nbsp;Mohammad Nazmul Islam","doi":"10.1016/j.apples.2025.100223","DOIUrl":"10.1016/j.apples.2025.100223","url":null,"abstract":"<div><div>This research examines the impact of axial load on the vibrational properties of nonlocal nanobeams. The theory of stress-driven nonlocal elasticity is utilized to characterize the response of the beam, integrating the influence of axial loads as a pivotal element in modifying its dynamic behavior. The governing equations for the beam's vibration are formulated through the application of stress-driven nonlocal elasticity theory, while investigating the influence of varying axial loads on natural frequencies and mode shapes. Analytical solutions are derived, and numerical simulations are performed to corroborate theoretical predictions. The findings indicate that axial loads have a substantial impact on the vibrational response, with alterations in both the natural frequencies and the mode shapes contingent upon the magnitude and direction of the axial load. The results provide significant understanding of the dynamic behavior of beams subjected to axial loads, especially within the framework of nonlocal stress-driven systems, which may have implications for structural health monitoring, vibration control, and material design.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"22 ","pages":"Article 100223"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermohydraulic performance enhancement for flow through circular geometries using curved pins","authors":"Rohit Dilip Gurav ,&nbsp;Prashant Wasudeo Deshmukh ,&nbsp;Parag Chaware","doi":"10.1016/j.apples.2025.100215","DOIUrl":"10.1016/j.apples.2025.100215","url":null,"abstract":"<div><div>Passive techniques for enhancing the thermal performance of existing systems show promise for various thermal applications. This study examines the use of curved pins with a rectangular cross-section mounted on the inner surface of a circular tube. These curved pins enhance the fluid's residence time by creating circulation, improving local and average heat transfer coefficients. The research investigates the average heat transfer and pressure drop in circular tubes equipped with curved pins under fully developed turbulent flow conditions. The Reynolds numbers at the inlet range from 10,000 to 50,000. The results reveal that the convective heat transfer coefficient on the inner tube surface can be up to 200% higher than that of a smooth tube. Additionally, the cost-effectiveness of this heat transfer enhancement method is assessed by considering the associated pressure drop using the thermohydraulic performance parameter (<em>R3</em>), which ranges from 0.75 to 1.40.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"22 ","pages":"Article 100215"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence analysis of parameters of thermal aging laminated rubber bearing under cyclic shear loads","authors":"Junwei Wang ,&nbsp;Fuqiang Zhao ,&nbsp;Zihan Guo ,&nbsp;Yifan Song","doi":"10.1016/j.apples.2025.100229","DOIUrl":"10.1016/j.apples.2025.100229","url":null,"abstract":"<div><div>Composite rubber bearing is an important supporting component in bridge structure system, its aging and shear performance will affect the safety of the whole structure. However, due to the complexity of LRB specifications and sizes, the shear properties of aging LRB under different parameters were studied. In this study, the thermal aging and shear tests of 12 LRBs of the same specifications were first carried out, and the test results were taken as a reference, and the finite element model was established to select the constitutive model and determine the parameters, and finally the constitutive model and parameters consistent with the test were determined. Then, LRBs with different shape coefficient, diameter and number of layers were established, and shear simulation was carried out respectively to compare with the shear performance of the test supports, and the changes of parameters such as maximum shear force, energy dissipation, equivalent shear stiffness, initial sliding displacement and sliding distance generated by LRBs of different specifications at different shear stages were studied. The results show that for LRB of the same specifications, aging does not affect the maximum shear force, but the hardness and energy dissipation of rubber material increase with the aging time, and the initial sliding distance decreases with the aging time. For LRB with different parameters, under the same aging time, the maximum shear force and energy dissipation increase with the increase of shear deformation, and the equivalent shear stiffness decreases with the increase of shear degree. The maximum shear force, energy dissipation and initial shear stiffness of LRB increase with the increase of shape coefficient and diameter. The number of layers of the LRB does not affect the maximum shear force, but the energy dissipation increases with the increase of the number of layers, and the equivalent shear stiffness decreases with the increase of the number of layers. The larger the shape factor, diameter and layer number of LRB, the more likely it is to slip. Therefore, the influence of bearing parameters on the shear performance of LRB should be considered comprehensively when designing LRB in actual engineering.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"22 ","pages":"Article 100229"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solution of viscoelastic creep models for anisotropic materials with linear relation between strain and stress but nonlinear with respect to time","authors":"Hiromichi Itou ,&nbsp;Victor A. Kovtunenko ,&nbsp;Gen Nakamura","doi":"10.1016/j.apples.2025.100219","DOIUrl":"10.1016/j.apples.2025.100219","url":null,"abstract":"<div><div>In this paper, we investigate anisotropic viscoelastic materials describing (both) creep relaxation and aging. The constitutive response is presented by hereditary integrals with memory kernel matrices using the Voigt–Mandel algebra. When the entries of the memory matrix are proportional with respect to time scale, a viscoelastic solution is constructed based on the variational solution of the corresponding anisotropic linear elastic problem. Example equations are presented, e.g., for orthotropic elastic materials, for standard linear solid (Zener) and Burgers viscoelastic models.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"22 ","pages":"Article 100219"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling and optimization of different pozzolanic materials in the durability of cement composite by central composite design","authors":"Tsion Amsalu Fode ,&nbsp;Yusufu Abeid Chande Jande ,&nbsp;Thomas Kivevele","doi":"10.1016/j.apples.2025.100221","DOIUrl":"10.1016/j.apples.2025.100221","url":null,"abstract":"<div><div>The production of Ordinary Portland Cement (OPC) requires high temperatures and significant energy consumption, leading to environmental pollution and posing challenges to the sustainability of green cementing materials. To address this, numerous researchers have explored replacing cement with various supplementary cementitious materials, such as blast furnace slag, active limestone, and bentonite in concrete or mortar. However, optimizing the combined use of these materials to achieve maximum durability in mortar remains a novel area of study. This research models and optimizes the effects of replacing OPC with blast furnace slag, active limestone, and bentonite in mortar using the central composite design method. The findings reveal that increasing the content of bentonite along with either blast furnace slag or limestone from 0 % to 20 % significantly minimizes strength degradation due to sulfuric acid exposure, improves heat resistance, and lowers water absorption at 28 days. The optimal substitution levels were found to be 20 % for both blast furnace slag and limestone, and 18.54 % for bentonite. The optumal result reduced damage from sulfate attack by 33.4 %, strength loss under high temperatures by 69.04 %, and water absorption by 98.58 % when compared to the control sample. These outcomes were validated experimentally with a 95 % confidence level. Overall, incorporating these SCMs not only improves the durability of mortar but also supports environmental sustainability by reducing CO₂ emissions due to OPC production.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"22 ","pages":"Article 100221"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On mesh refinement procedures for polygonal virtual elements","authors":"Daniel van Huyssteen ,&nbsp;Felipe Lopez Rivarola ,&nbsp;Guillermo Etse ,&nbsp;Paul Steinmann","doi":"10.1016/j.apples.2025.100222","DOIUrl":"10.1016/j.apples.2025.100222","url":null,"abstract":"<div><div>This work concerns the application of adaptive refinement procedures to meshes of unstructured polygonal virtual elements. Adaptive refinement indicators previously proposed by the authors, and investigated for meshes of structured quadrilateral elements, are studied in more general applications. Specifically, the performance of the indicators is studied on unstructured polygonal meshes, and for cases of compressible and nearly-incompressible materials. Localized refinement of unstructured meshes is a non-trivial task as the algorithm must be robust, and must accommodate a wide variety of geometric possibilities. To this end, an element refinement algorithm is presented based on strategic seeding of Voronoi tessellations and is suitable for both structured and unstructured meshes. Furthermore, it is not known <em>apriori</em> whether the previously proposed refinement indicators will be reliable or effective in the presence of unstructured mesh geometries and nearly-incompressible materials. Thus, the performance of the refinement procedures is studied through a broad numerical campaign. The results demonstrate that the high degree of efficacy and efficiency previously exhibited by the adaptive procedures is also achieved in the cases of irregular unstructured/Voronoi meshes and near-incompressibility.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"22 ","pages":"Article 100222"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of the state-of-charge on the mechanical behaviour of lithium-ion pouch cells under uniaxial compression","authors":"Daniele Cioni ,&nbsp;Lucas Lapostolle ,&nbsp;Miguel Costas ,&nbsp;Steven Boles ,&nbsp;David Morin","doi":"10.1016/j.apples.2025.100211","DOIUrl":"10.1016/j.apples.2025.100211","url":null,"abstract":"<div><div>With extensive recent deployment of lithium batteries in stationary and mobility applications, integration engineers face a challenging burden for design and planning the static and dynamic external environment surrounding cells. Essential to these designs are understanding how cells respond to mechanical compression and the thresholds for initiating catastrophic failure. This study investigates how the state of charge (SOC) affects the compressive mechanical behaviour and the occurrence of internal short circuits (ISC) in lithium-ion pouch cells. NMC811 lithium-ion pouch cells were subjected to uniaxial compression tests at different SOCs, namely deep discharge, 0 %, 50 %, and 100 %. The results showed that the SOC has a minor effect on macroscopic compression behaviour and the occurrence of ISC. Engineering stress at ISC increased linearly with the SOC due to slight stiffening at higher SOC levels, while engineering strain at ISC remained constant. These findings suggest that deep-discharged cells can be used for safer mechanical testing, as their mechanical response is effectively equivalent to that of charged cells, but poses a lower safety risk. Furthermore, the results of this study align with prior research regarding the influence of SOC on the mechanical response of pouch cells. Such response is deemed to be influenced by compressive internal stresses, generated by the constrained SOC-related swelling of the jellyroll.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"21 ","pages":"Article 100211"},"PeriodicalIF":2.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermo-mechanical stress analysis and critical condition estimation in lithium lanthanum niobate (LiLaNbO) thin electrolyte plate of all-solid-state battery","authors":"Tasnuva Tabashhum Choudhury ,&nbsp;Nahid Imtiaz Masuk ,&nbsp;Pranoy Deb ,&nbsp;Md. Nurul Islam ,&nbsp;Md Ashraful Islam","doi":"10.1016/j.apples.2025.100206","DOIUrl":"10.1016/j.apples.2025.100206","url":null,"abstract":"<div><div>This study analyzes the thermo-mechanical stress fields within a LiLaNbO electrolyte in all-solid-state batteries, considering various temperature gradients, boundary conditions, and material properties. Using advanced plate theory, an infinitesimally thin electrolyte plate integrated into a planar battery system was modeled. The stress distributions were computed analytically and verified with simulations using ANSYS Workbench under four distinct boundary conditions: FR (Free to expand and bend), NB (No bending, free to expand), NE (No expansion, free to bend), and NBE (No bending or expansion). For uniform temperature conditions (T1 = T2 = 350 K), compressive stresses of up to 70 MPa were observed for NBE, while FR and NB conditions yielded negligible stresses. Under temperature gradients (e.g., T1 = 300 K, T2 = 250 K to 350 K), stress profiles varied linearly along the z-axis for theoretical predictions, while simulated results showed slight deviations, with maximum stresses of approximately -60 MPa. Material properties such as Young's modulus (97–106 GPa) and thermal expansion coefficients (6 × 10⁻⁶ K⁻¹) were considered temperature-dependent, revealing their limited impact on stress distributions within 200–400 K. A novel estimation method for identifying critical operational conditions is proposed, ensuring mechanical stability by limiting stress to below 150 MPa. The findings provide actionable insights for enhancing the safety and reliability of all-solid-state batteries.</div></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"21 ","pages":"Article 100206"},"PeriodicalIF":2.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}