International Journal of Mechanical Sciences最新文献_第10页

In-situ investigation of interlayer interface bonding defect-formation mechanisms during FRAM FRAM过程中层间界面粘结缺陷形成机制的原位研究

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-23 DOI: 10.1016/j.ijmecsci.2025.110406

Yangyang Xu , Haibin Liu , Ruishan Xie , Ying Chen , Dawei Guo , Shujun Chen

{"title":"In-situ investigation of interlayer interface bonding defect-formation mechanisms during FRAM","authors":"Yangyang Xu , Haibin Liu , Ruishan Xie , Ying Chen , Dawei Guo , Shujun Chen","doi":"10.1016/j.ijmecsci.2025.110406","DOIUrl":"10.1016/j.ijmecsci.2025.110406","url":null,"abstract":"<div><div>The formation mechanisms of interlayer interface defects in friction-rolling additive manufacturing are yet to be investigated systematically. This study employs the emergency-stop technique, in-situ measurements, and metallographic characterization to investigate the interface morphology, transient temperature, and deposition forces in the action zone during the deposition, thereby revealing the formation mechanisms of interlayer interface defects and the flow behavior of materials. The findings indicate that at <em>n</em> = 1400 rpm, the action zone (TC2) temperature measured in situ is 543.6°C, with average transverse force (Fx) and downward force (Fz) values of 210 and 270 N, respectively. When <em>v</em> = 180 mm/min, the TC2 temperature is 493.6°C, with Fx and Fz values of -700 and 1900 N, respectively. The shorter dwell time reduces the material’s plastic deformation and flow, thus resulting in insufficient material flow. When <em>h</em> = 1.2 mm, the TC2 temperature is 452.3°C, with Fx and Fz values of -748 and 404 N, respectively. The interface material is not effectively stirred by the toolhead, which hinders sufficient plastic flow, thus resulting in the lowest bonding quality. The formation of defects is attributed to significant differences in the TC2 temperature and Fz, which diminish the toolhead’s stirring and rolling effects. Although an increase in the deposition layers increases the TC2 temperature, interface defects remain incompletely suppressed, ultimately affecting the mechanical properties of the samples. This study elucidates the significance of in-situ temperature and Fz measurements, thus providing a theoretical foundation for further efforts to suppress interfacial defects.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110406"},"PeriodicalIF":7.1,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Passive drag reduction of hyperloop pod by ventilation ducts 通风管道对超级高铁吊舱的被动减阻

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-23 DOI: 10.1016/j.ijmecsci.2025.110405

Khashayar Kanaanizade , Massoud Tatar , Juan Guzman-Inigo , Mehran Masdari

{"title":"Passive drag reduction of hyperloop pod by ventilation ducts","authors":"Khashayar Kanaanizade , Massoud Tatar , Juan Guzman-Inigo , Mehran Masdari","doi":"10.1016/j.ijmecsci.2025.110405","DOIUrl":"10.1016/j.ijmecsci.2025.110405","url":null,"abstract":"<div><div>In this paper, the applicability and efficiency of ventilation duct (VD) as a novel passive drag reduction method for Hyperloop pod were investigated using 3-D numerical simulations. Ventilation duct connects the upstream and downstream parts of the pod, increasing the effective cross-sectional area and reducing drag caused by choked flow between the pod walls and the external tube. This study introduces an innovative approach to drag reduction in Hyperloop system by addressing two previously overlooked challenges. First, it overcomes the constraint of allocating central space exclusively to the passenger compartment by redirecting ducts along pod shell’s boundary. Second, it enhances spatial efficiency by implementing a distributed duct configuration. For this purpose, four different design strategies along with six and eight number of ducts were proposed. The accuracy and validity of the solution were established through four distinct phases, including two comparisons with different experimental surveys, numerical research, and an assessment of mesh dependency. Results of the simulations showed that design strategy type 1 has the best performance in drag reduction. Only a minor difference in total drag was observed by changing number of ducts. It was demonstrated that VDs can decrease the total power consumption at all pod speeds with a maximum reduction of 16 % obtained while occupying only 2.5 % of the passenger compartment space. Comparisons of the VD method with compressor revealed that with identical removed frontal area, VDs achieve greater reductions in power consumption with less occupation of pod space.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110405"},"PeriodicalIF":7.1,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

SPH modeling of concrete failure using the M7 microplane model 基于M7微平面模型的混凝土破坏SPH模型

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-22 DOI: 10.1016/j.ijmecsci.2025.110378

Mohammad Naqib Rahimi , Georgios Moutsanidis

{"title":"SPH modeling of concrete failure using the M7 microplane model","authors":"Mohammad Naqib Rahimi , Georgios Moutsanidis","doi":"10.1016/j.ijmecsci.2025.110378","DOIUrl":"10.1016/j.ijmecsci.2025.110378","url":null,"abstract":"<div><div>Modeling concrete failure under extreme events, such as hypervelocity impact, air-blast loading, or water impact, has long been an open research area in the engineering mechanics community. Over the years, numerous concrete constitutive models capturing failure have been developed and effectively applied within traditional computational techniques, such as the finite element method (FEM). However, research activity involving meshfree and particle-based numerical methods, such as smoothed particle hydrodynamics (SPH), remains limited in this context. This paper presents the first implementation of the evolving microplane (M7) concrete constitutive model within the framework of SPH. The meshfree nature of SPH enables the simulation of scenarios involving extreme deformations, material separation, and discrete fractures, challenges that conventional mesh-based computational techniques often struggle to address. Comprehensive mathematical and implementation details are provided, and the framework is verified and validated through several benchmark tests that demonstrate the applicability of the M7 model in SPH. The framework is further applied to a hypervelocity impact scenario, illustrating its capability to capture fracture and fragmentation under extreme conditions. Finally, to support community adoption, the open-source SPH implementation, including calibration procedures and parameters, is made available via a GitHub repository. This work provides the SPH community with a robust tool for modeling concrete failure and contributes to advancing computational methods for extreme events simulations.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110378"},"PeriodicalIF":7.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Theoretical model for creep behaviors of CoCrFeMnNi high entropy alloys CoCrFeMnNi高熵合金蠕变行为的理论模型

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-22 DOI: 10.1016/j.ijmecsci.2025.110403

Hanlu Xie , Shilin Li , Long Yu , Xiazi Xiao

{"title":"Theoretical model for creep behaviors of CoCrFeMnNi high entropy alloys","authors":"Hanlu Xie , Shilin Li , Long Yu , Xiazi Xiao","doi":"10.1016/j.ijmecsci.2025.110403","DOIUrl":"10.1016/j.ijmecsci.2025.110403","url":null,"abstract":"<div><div>3-power law creep of high entropy alloys (HEAs) is different from that of conventional alloys. In order to help comprehend the relation between microstructure evolution and macroscopic creep response, three dominant mechanisms related to dislocation movements are considered in this work, i.e. dislocation climb, thermally activated dislocation glide and viscous glide. Thereinto, the influence of dislocation viscous glide on the evolution of dislocation density and velocity is systematically analyzed. For the former, the time effect of viscous glide is taken into account in the derivation of the static recovery term for dislocation density evolution. For the latter, dislocation viscous glide can lead to the reduction for dislocation climb velocity due to the drag effect of solute atmosphere, and the dislocation glide velocity is controlled by the competition between the preparation stage for dislocation climb or thermally activated dislocation glide and viscous glide. To validate the developed creep model, experimental data of CoCrFeMnNi HEAs for both the high stress region (<span><math><mrow><mi>n</mi><mo>≈</mo><mn>5</mn></mrow></math></span>) and low stress region (<span><math><mrow><mi>n</mi><mo>≈</mo><mn>3</mn></mrow></math></span>) has been considered. A good agreement is achieved between the theoretical results and experimental data, which offers a solid basis to further analyze the effect of dislocation viscous glide from the aspect of microstructure evolution for HEAs.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110403"},"PeriodicalIF":7.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Dynamic characteristics analyses of coupled-multibody axial piston pump model 耦合多体轴向柱塞泵模型动态特性分析

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-22 DOI: 10.1016/j.ijmecsci.2025.110379

Shaogan Ye , Chenliang Zheng , Yue Bao , Kefei Miao , Huixiang Liu , Shoujun Zhao

{"title":"Dynamic characteristics analyses of coupled-multibody axial piston pump model","authors":"Shaogan Ye , Chenliang Zheng , Yue Bao , Kefei Miao , Huixiang Liu , Shoujun Zhao","doi":"10.1016/j.ijmecsci.2025.110379","DOIUrl":"10.1016/j.ijmecsci.2025.110379","url":null,"abstract":"<div><div>Axial piston pumps, renowned for their compactness and resistance to cavitation, often face stability and vibration challenges due to complex component interactions. This study proposes a novel multi-rigid-body dynamic model incorporating 18 lumped mass points (LMPs) and 90 degrees of freedom. Using the Lagrange equation and an explicit-implicit method, the model efficiently solves for transient dynamics and is experimentally validated. Parametric analyses under varying pressures and rotational speeds reveal that slipper pair friction dominates at high pressure and low speed, while centrifugal forces induce force reversals in critical regions at high speeds. Meanwhile, piston vibrations in the radial directions show resonance risks near the natural frequency of the system, with second-harmonic amplitudes exceeding the fundamentals under 8000 r/min. When under high-speed conditions, both the complexity and intensity of the vibration response are significantly amplified. Additionally, the power contribution analysis quantifies the influence of each excitation force on piston vibration. This work provides a validated framework for decoupling multi-body interactions, offering valuable insights for optimizing vibration suppression and enhancing stability in high-performance hydraulic systems.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110379"},"PeriodicalIF":7.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Programmable inverse design framework for morphing hard-magnetic soft materials 变形硬磁软材料的可编程逆设计框架

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-22 DOI: 10.1016/j.ijmecsci.2025.110355

Maoyuan Li , Yifan Yang , Ya Wen , Jizhai Cui , Wei Cheng , Enming Song , Fan Xu

{"title":"Programmable inverse design framework for morphing hard-magnetic soft materials","authors":"Maoyuan Li , Yifan Yang , Ya Wen , Jizhai Cui , Wei Cheng , Enming Song , Fan Xu","doi":"10.1016/j.ijmecsci.2025.110355","DOIUrl":"10.1016/j.ijmecsci.2025.110355","url":null,"abstract":"<div><div>As a type of shape-programmable soft materials, hard-magnetic soft materials (HMSMs) exhibit rapid and reversible deformations under applied magnetic fields, showing promise for soft robotics, flexible electronics, and biomedical devices. The realization of various controllable shape transformations is crucial to the rational design of relevant applications. However, due to highly nonlinear relation between large deformations and actuation fields, how to quantitatively design the residual magnetization distribution and driving magnetic field in the initial configuration to morph into a target shape remains a challenge. Here, we propose an inverse design strategy for targeted bending dominated deformations of hard-magnetic beam structures, which combines a 3D hard-magnetic rod model with intelligent optimization algorithms, enabling hard-magnetic beams to achieve multi-step pre-designed shapes by programming the magnetization densities and external magnetic fields in the initial undeformed configuration. Based on the proposed framework, we explore diverse target shapes under various magnetization modes, and compare the numerical accuracy and efficiency of three intelligent optimization algorithms. Moreover, we demonstrate multi-step inverse design examples in which the same sample achieves a flexible transition of various pre-designed deformation modes. The results demonstrate that the presented strategy offers an innovative and versatile approach for programmable inverse design of morphing magnetically-driven flexible devices and soft robotics.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110355"},"PeriodicalIF":7.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Enhanced energy absorption of assembled honeycomb system under in-plane compression 面内压缩下组合蜂窝系统的增强吸能

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-22 DOI: 10.1016/j.ijmecsci.2025.110404

Jiaming Lu , Qijian Li , Ruixian Qin , Xi Wang , Tianyi Li , Hongzhe Niu , Bingzhi Chen

{"title":"Enhanced energy absorption of assembled honeycomb system under in-plane compression","authors":"Jiaming Lu , Qijian Li , Ruixian Qin , Xi Wang , Tianyi Li , Hongzhe Niu , Bingzhi Chen","doi":"10.1016/j.ijmecsci.2025.110404","DOIUrl":"10.1016/j.ijmecsci.2025.110404","url":null,"abstract":"<div><div>Honeycomb structures are widely used for energy-absorption subjected to in-plane and out-of-plane crushing loads. In our previous work, a self-locking honeycomb was proposed for energy absorption under out-of-plane compression, achieving an effective balance between fabrication cost and energy absorption performance in high energy absorption scenarios. However, the honeycomb energy-absorbing performance is obviously insufficient due to the degradation of self-locking stiffness for in-plane compression. To further improve the energy-absorbing performance of the honeycomb structure under in-plane loading, this paper adopts a foam-filling strategy to achieve the performance enhancement of the self-locking honeycomb structure. Firstly, the energy absorption characteristics of the self-locking structure during in-plane compression were investigated by numerical simulation. Secondly, relevant experiments were carried out to verify the accuracy of the simulation results. In addition, a theoretical model is proposed to quickly predict the structural energy absorption for in-plane compression. Finally, the effects of different compression velocities and boundary conditions on the structural energy absorption were analyzed. It is indicated that the foam-filled self-locking honeycomb structure can effectively enhance the energy-absorbing performance under out-of-plane loading, and provide effective stiffness constraints for the deformation of the bending plate inside the locking nodes to maximize the energy-absorbing efficiency. In particular, the energy-absorbing performance of the foam-filled self-locking honeycomb structure of the basic cell bending plate is closely related to the loading velocity and the boundary constraints, and the energy-absorbing efficiency can be further enhanced by setting the boundary constraints in the energy-absorbing structure design.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110404"},"PeriodicalIF":7.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Crashworthiness of pomelo-inspired PLA structures with gradient cellular design 基于梯度细胞设计的柚形PLA结构的耐撞性

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-21 DOI: 10.1016/j.ijmecsci.2025.110402

M Kathiresan , Vasudevan Rajamohan , Jose Immanuel R , Surekha Gnanasekar

{"title":"Crashworthiness of pomelo-inspired PLA structures with gradient cellular design","authors":"M Kathiresan , Vasudevan Rajamohan , Jose Immanuel R , Surekha Gnanasekar","doi":"10.1016/j.ijmecsci.2025.110402","DOIUrl":"10.1016/j.ijmecsci.2025.110402","url":null,"abstract":"<div><div>This study presents a novel approach to enhancing crashworthiness by investigating bio-inspired Voronoi panels modeled after the gradient cellular architecture of pomelo peel. The panels, fabricated using 3D additive fused filament fabrication (<em>FFF</em>) with <em>PLA</em>, feature controlled variations in cellular density, cellular-density-distribution, and wall thickness. A key innovation lies in the design of a centrally densified Voronoi configuration (VM100-CD50-T2), which closely replicates the natural porosity distribution present in the mesocarp region of pomelo fruit. Quasi-static in-plane compression tests, validated by finite element simulations using ABAQUS®, were used to evaluate critical crashworthiness metrics, including Load Uniformity Index (<em>LUI</em>), Crush Force Efficiency (<em>CFE</em>), and Specific Energy Absorption (<em>SEA</em>). Results show that increasing wall thickness significantly enhances <em>SEA</em> by up to 89 % in UM50 panels and that cell density distribution plays a critical role in load response. The VM100-CD50-T2 panel exhibited a 12 % increase in <em>SEA</em> and progressive collapse behavior with a 26 % reduction in initial peak load, demonstrating the structural advantage of a functionally graded cellular design. This work introduces a bio-inspired gradient design methodology with direct applications in lightweight, energy-absorbing components for automotive, aerospace, and protective systems.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110402"},"PeriodicalIF":7.1,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Stretch-induced wrinkling and post-buckling bifurcation in rectangular films: insights into energy barrier mechanisms 矩形薄膜中拉伸引起的起皱和后屈曲分岔：对能量势垒机制的见解

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-20 DOI: 10.1016/j.ijmecsci.2025.110398

Xinghan Qiu , Jiaming Guo , Changguo Wang , Huifeng Tan

{"title":"Stretch-induced wrinkling and post-buckling bifurcation in rectangular films: insights into energy barrier mechanisms","authors":"Xinghan Qiu , Jiaming Guo , Changguo Wang , Huifeng Tan","doi":"10.1016/j.ijmecsci.2025.110398","DOIUrl":"10.1016/j.ijmecsci.2025.110398","url":null,"abstract":"<div><div>Theoretical understanding is essential for revealing wrinkling mechanisms, characterizing wrinkle behaviors, and guiding the design of thin films. However, existing studies on stretch-induced wrinkling in thin films still exhibit significant limitations in describing non-uniform wrinkle characteristics and post-buckling bifurcation evolution. This paper presents a novel wrinkle bifurcation theory based on energy methods. An energy model for a single wrinkle stripe is first constructed, and the concept of bifurcation points is introduced to describe the onset of wrinkle evolution. Specifically, the theory addresses typical nonuniform and localized instability modes in rectangular thin films under tension. By decomposing the axial boundary conditions and incorporating both mechanical and geometrical properties, this approach accurately captures spatial wrinkle variations and provides a detailed post-buckling bifurcation analysis. The concept of energy barriers, along with the decomposition of total energy into stretching and bending components, is employed to elucidate the evolution mechanism of wrinkle bifurcation throughout the loading process. This study offers valuable insights for the mitigation and control of wrinkles in rectangular thin film structures.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110398"},"PeriodicalIF":7.1,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Nonlinear dynamics of gear transmission with an improved wear model 基于改进磨损模型的齿轮传动非线性动力学

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-20 DOI: 10.1016/j.ijmecsci.2025.110399

Zhengfa Li , Zaigang Chen , Liang Guo , Wanming Zhai

{"title":"Nonlinear dynamics of gear transmission with an improved wear model","authors":"Zhengfa Li , Zaigang Chen , Liang Guo , Wanming Zhai","doi":"10.1016/j.ijmecsci.2025.110399","DOIUrl":"10.1016/j.ijmecsci.2025.110399","url":null,"abstract":"<div><div>Gear teeth wear is an inevitable fault in the gear transmission system, which will change tooth profile shape, tooth contact behavior, and system response. Traditional tooth wear models have limited accuracy because they neglect both the worn tooth profile’s effect on contact pressure or the varying sliding distances of discretized points on the tooth profile. Therefore, an improved teeth wear model is proposed, considering the asymmetric contact pressure distribution and pressure concentration caused by worn teeth or corner contact, along with a new sliding distance computation method that addresses overlapping contact spots. Subsequently, the interaction between the teeth wear and gear meshing models is realized through iterative updates of the worn tooth profile, wear depth, and tooth contact force. Experiments or finite element results verify teeth wear and gear meshing models, and how varying wear depths affect contact force, contact pressure, mesh stiffness, and system nonlinear dynamics are studied. The results show that the generation mechanism of significant wear near the tooth tip is attributed to the pressure concentration effects induced by corner contact. Micron-level teeth wear significantly deteriorates contact pressure distribution and induces pressure concentration near the reference circle. Moreover, the teeth wear will reduce the number of mesh teeth and cause the system’s chaotic motion and motion-jumping phenomenon. This work enhances the gear wear model’s calculation accuracy and explores the gear wear effect mechanism on mesh characteristics and the nonlinear response of gear systems.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"299 ","pages":"Article 110399"},"PeriodicalIF":7.1,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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