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

Critical physics-informed fatigue life prediction of laser 3D printed AlSi10Mg alloys with mass internal defects 具有大量内部缺陷的激光 3D 打印 AlSi10Mg 合金的临界物理学疲劳寿命预测

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2024-09-14 DOI: 10.1016/j.ijmecsci.2024.109730

Yanan Hu , Yufeng She , Shengchuan Wu , Qianhua Kan , Huan Yu , Guozheng Kang

{"title":"Critical physics-informed fatigue life prediction of laser 3D printed AlSi10Mg alloys with mass internal defects","authors":"Yanan Hu , Yufeng She , Shengchuan Wu , Qianhua Kan , Huan Yu , Guozheng Kang","doi":"10.1016/j.ijmecsci.2024.109730","DOIUrl":"10.1016/j.ijmecsci.2024.109730","url":null,"abstract":"<div><div>The significant scatter in high cycle fatigue life of additively manufactured metallic components presents an increasing challenge to structural integrity. This fatigue life variation is radically attributed to the differences in physical features of critical defects that lead to crack initiation. To address this issue, this paper proposes an integrated framework for identifying critical defects and predicting fatigue life using physics-informed machine learning, with a focus on the impact of 3D defect features. By employing X-ray tomography, high cycle fatigue tests, and fractography analyses on post-mortem specimens, a dataset associated with mass internal defects is first built up to correlate the spatial geometric features of critical defects with fatigue life. A kernel support vector machine is then used to formulate a critical defect identification model, aimed at identifying critical defects among numerous defects by evaluating their geometric attributes. Finally, a fatigue life prediction model is developed using a physics-informed neural network, which incorporates the influence of defect geometry on fatigue life as physical constraints in the loss function. The integrated framework demonstrates that fatigue life predictions from identified critical defects in each specimen exhibit small deviations, with the average prediction falling within twice the error bands. This study is expected to provide a valuable reference for fatigue assessment of additively manufactured components through sequential critical defect identification and fatigue life prediction.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"284 ","pages":"Article 109730"},"PeriodicalIF":7.1,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323017","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

Coupled crystal plasticity-phase field simulation of twin-twin interaction in magnesium 镁中孪晶相互作用的晶体塑性-相场耦合模拟

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2024-09-14 DOI: 10.1016/j.ijmecsci.2024.109734

Jiachen Hu , Bo Xu , Junyuan Xiong , Chao Yu , Guozheng Kang

{"title":"Coupled crystal plasticity-phase field simulation of twin-twin interaction in magnesium","authors":"Jiachen Hu , Bo Xu , Junyuan Xiong , Chao Yu , Guozheng Kang","doi":"10.1016/j.ijmecsci.2024.109734","DOIUrl":"10.1016/j.ijmecsci.2024.109734","url":null,"abstract":"<div><div>Twin-twin interactions significantly influence the mechanical properties of magnesium and its alloys. A thorough understanding of the underlying mechanisms governing these interactions is essential for designing Mg alloys with enhanced strength and toughness. In this work, a crystal plasticity-twin coupled phase field (CP-TPF) model incorporating multiple extension twin variants and considering the role of dislocation slipping is proposed to investigate the interactions between/among the same twin variants and those between co-zone twin variants in Mg single crystals. The model incorporates an additional energy term to represent the interaction among different twin variants and couples the CP and TPF models through order parameters and stress tensor. The simulated results show that the interaction between the same twin variants can either promote or inhibit the twin propagation, and multiple twins tend to generate concurrently in Mg single crystal to minimize the free energy associated with the accumulation of elastic strain. During co-zone twin-twin interaction, localized thickening of the recipient twin occurs due to the concentrated stresses induced by the intrusion twin, and the mutual extrusion of the two twins leads to blunting of the intrusion twin tip. Both the coalescence of the same twin variants and the formation of twin-twin boundaries between the co-zone twin variants contribute to the effective mechanism of twinning-induced hardening. Moreover, local dislocation accommodation plays a crucial role in twin-twin interactions. It relaxes the stress concentration near the twin tips and twin-twin boundaries and significantly contributes to the uneven migration of the twin boundary.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"284 ","pages":"Article 109734"},"PeriodicalIF":7.1,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142306476","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

Sequential dual-scale approach for microstructure-informed ductile fracture prediction 基于微观结构的韧性断裂预测序列双尺度方法

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2024-09-13 DOI: 10.1016/j.ijmecsci.2024.109719

Jinwook Jung , Hyukjae Lee , Woojin Cho , Byeong-Seok Jeong , Yoon Seok Ko , Sung-Il Kim , Dong-Ik Kim , Myoung-Gyu Lee , Heung Nam Han

{"title":"Sequential dual-scale approach for microstructure-informed ductile fracture prediction","authors":"Jinwook Jung , Hyukjae Lee , Woojin Cho , Byeong-Seok Jeong , Yoon Seok Ko , Sung-Il Kim , Dong-Ik Kim , Myoung-Gyu Lee , Heung Nam Han","doi":"10.1016/j.ijmecsci.2024.109719","DOIUrl":"10.1016/j.ijmecsci.2024.109719","url":null,"abstract":"<div><div>This study presents a novel dual-scale finite element method to establish a microstructure-informed ductile fracture criterion for ferrite–martensite dual-phase (DP) steel. At the macroscale, an anisotropic plasticity model with rate-dependent hardening was employed to simulate the material's deformation history. Simultaneously, at the microscale, a dislocation density-based crystal plasticity model was utilized to simulate deformation within a representative volume element (RVE) of the dual-phase steel, constructed using tomography aided by a plasma-focused ion beam/electron backscatter diffraction system.</div><div>The material properties of the ferrite and martensite phases were determined through X-ray diffraction (XRD) analysis and load-displacement measurements obtained via nanoindentation for each phase. The RVE simulation results were validated against experimentally measured mechanical properties and microstructural changes. The local deformation history at the fracture initiation site, extracted from the macroscale model, was used as boundary conditions for the microscale RVE simulation; <em>sequential dual-scale approach</em>. The models were applied to specimens with varying notch radii, generating different local stress triaxialities and accumulated shear strains at fracture onset. This process allowed the establishment of a ductile fracture criterion, which was further tested in a hole expansion experiment, demonstrating close alignment with experimental data.</div><div>This sequential dual-scale analysis effectively predicts the deformation behavior of multiphase metallic materials by incorporating realistic microstructures while minimizing computational costs. Consequently, the proposed ductile fracture prediction technique offers a robust method with broad applicability across various metallic materials.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"284 ","pages":"Article 109719"},"PeriodicalIF":7.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323018","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

Reflected acoustic wave manipulation by metasurfaces in a grazing flow 掠过流中元表面对反射声波的操纵

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2024-09-13 DOI: 10.1016/j.ijmecsci.2024.109696

Renhao Qu , Jingwen Guo , Yuhong Li , Qichen Tan , Zhenjun Peng , Lican Wang , Yi Fang , Peng Zhou

{"title":"Reflected acoustic wave manipulation by metasurfaces in a grazing flow","authors":"Renhao Qu , Jingwen Guo , Yuhong Li , Qichen Tan , Zhenjun Peng , Lican Wang , Yi Fang , Peng Zhou","doi":"10.1016/j.ijmecsci.2024.109696","DOIUrl":"10.1016/j.ijmecsci.2024.109696","url":null,"abstract":"<div><p>Acoustic metasurfaces (AMs) can manipulate acoustic waves in ways that are not reachable in natural materials, offering significant implications for engineering applications such as noise control. While previous studies have primarily been conducted in stationary mediums, this study delves into the sound reflections of wave-manipulation AMs subjected to a grazing flow. An analytical model is developed to predict the sound reflections of both periodic and non-periodic AMs under flow conditions based on the plane-wave expansion. The flow effects on the periodic and focusing AMs are analytically and numerically investigated. Experiments are also conducted in a newly designed aeroacoustic oblique plane wave (AOPW) facility at the Hong Kong University of Science and Technology (HKUST). Results show that the reflected sound pressure fields of wave-manipulation AMs under flow conditions can be predicted well by the analytical model. Good absorption of the periodic AMs can be achieved by adjusting the periodic length-to-wavelength ratio to below <span><math><mrow><mrow><mo>(</mo><mn>1</mn><mo>−</mo><msubsup><mrow><mi>M</mi></mrow><mrow><mn>0</mn></mrow><mrow><mn>2</mn></mrow></msubsup><mo>)</mo></mrow><mo>/</mo><mn>2</mn></mrow></math></span> due to the surface wave conversion mechanism. The focal points of the AMs designed in the stationary air shift to the downstream direction due to the flow effects, which can be corrected by the proposed analytical model. The focusing AM design is also extended into a three-dimensional (3D) space and is validated analytically. This study extends the understanding of wave-manipulation AMs into flow conditions, which may help the AM design operating in non-stationary mediums, such as air and water flows.</p></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"284 ","pages":"Article 109696"},"PeriodicalIF":7.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241096","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

The analysis of scaled mechanical dynamic systems 按比例机械动力系统分析

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2024-09-13 DOI: 10.1016/j.ijmecsci.2024.109722

Keith Davey , Jiahe Xu , Hamed Sadeghi , Rooholamin Darvizeh

{"title":"The analysis of scaled mechanical dynamic systems","authors":"Keith Davey , Jiahe Xu , Hamed Sadeghi , Rooholamin Darvizeh","doi":"10.1016/j.ijmecsci.2024.109722","DOIUrl":"10.1016/j.ijmecsci.2024.109722","url":null,"abstract":"<div><p>A new approach to scaled experimentation has appeared in the open literature bringing into existence a countably infinite number of similitude rules connecting multiple scaled experiments. The simplest rule (the zeroth-order rule) captures all what is possible with dimensional analysis but higher-order rules appear to necessitate investigations at multiple scales. The scaling theory <em>finite similitude</em> can however, be repurposed for the analysis of scaled models making it possible to relate models of two different sizes whilst automatically accounting for all scale effects present. The new approach to scaling analysis gives rise to additional systems of equations that are required to be solved and it is this aspect that is the main focus of this paper. It is shown through application of the new scaling-analysis approach to mechanical systems built from discrete elements (e.g., springs, lumped masses, dampers) how scale effects are directly represented. Scaling analysis under the finite-similitude framework is shown to be effective for connecting up scaled models but additionally dovetails with experimental approaches involving scaled experiments. Through application to mechanical systems the new formulation is shown to have practical value but also reveals how system-level scale effects can be handled efficiently. The approach provides a framework for the design and analysis of mechanical components that are required to operate over a range of sizes.</p></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"284 ","pages":"Article 109722"},"PeriodicalIF":7.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S002074032400763X/pdfft?md5=45bcc1fd9e499e79bd361c68a63a710d&pid=1-s2.0-S002074032400763X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and modeling of a programmable morphing structure with variable stiffness capability 具有可变刚度能力的可编程变形结构的设计与建模

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2024-09-12 DOI: 10.1016/j.ijmecsci.2024.109699

Tianyu Chen, Xudong Yang, Yifan Wang

{"title":"Design and modeling of a programmable morphing structure with variable stiffness capability","authors":"Tianyu Chen, Xudong Yang, Yifan Wang","doi":"10.1016/j.ijmecsci.2024.109699","DOIUrl":"10.1016/j.ijmecsci.2024.109699","url":null,"abstract":"<div><p>The development of structures capable of both dynamic shape morphing and stiffness modulation has significant potential in various applications. However, such structures often suffer from bulkiness and control complexity. This paper addresses these challenges by exploring a scaled structure that integrates morphing capabilities and variable stiffness within a compact configuration. For the first time, we establish a comprehensive set of design criteria and obtain the previously unexplored design space, focusing on geometric parameters including layer thickness, target shape radius, the number of scales, and the number of periods per scale. Through extensive finite element simulations, we evaluate the impact of material property and geometric parameters on the performance of the scaled structure, emphasizing the role of coefficient of friction. Our findings identify a critical threshold for the coefficient of friction above which morphing ability is hindered. Additionally, we uncover a trade-off between morphing capability and stiffness variation ability, which we overcome by modifying the surface structure of the scales. The optimal design is found to be a superellipse shape with an exponent of ∼1.9. The practical potential of this structure is demonstrated through three applications: a soft gripper, a phone stand, and a foldable box, showcasing its versatility in real-world scenarios. This research provides a foundational approach for designing morphing scaled structures, offering valuable insights into optimizing morphing capability and stiffness variation ability for broader engineering applications.</p></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"284 ","pages":"Article 109699"},"PeriodicalIF":7.1,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241099","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

Geometrical incompatibility regulated pattern selection and morphological evolution in growing spherical soft tissues 几何不相容性调节了生长球形软组织的模式选择和形态演化

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2024-09-12 DOI: 10.1016/j.ijmecsci.2024.109720

Congshan Liu , Feng Wang , Wenxiang Tao , Chaofeng Lü

{"title":"Geometrical incompatibility regulated pattern selection and morphological evolution in growing spherical soft tissues","authors":"Congshan Liu , Feng Wang , Wenxiang Tao , Chaofeng Lü","doi":"10.1016/j.ijmecsci.2024.109720","DOIUrl":"10.1016/j.ijmecsci.2024.109720","url":null,"abstract":"<div><p>Surface morphological patterns are widely observed in natural systems, which are closely correlated to vital biological functions and inspire surface morphology designs in soft matter systems. Geometrical incompatibility widely exists in biological tissues across different length scales and plays an important role in growth-induced pattern selection and morphological evolution of soft tissues. However, the underlying physical mechanism of growth-induced pattern formation and post-buckling evolution in geometrically incompatible spherical soft tissues remain elusive. Here, the effect of geometrical incompatibility on the growth-induced pattern selection and post-buckling evolution are investigated through swelling experiment, theoretical analysis and numerical simulation. The results show that not only the instability pattern but also the instability threshold can be regulated by manipulating geometric incompatibility. Notably, when the geometrical incompatibility parameter exceeds a critical value, spontaneous instability is observed before growth. With continuous growth, the core–shell soft sphere buckles into a periodic buckyball pattern and evolves toward a bean-shaped pattern, and then undergoes a wrinkle-to-fold transition into a labyrinth topography. Our results demonstrate, both experimentally and theoretically, that geometrical incompatibility can guide the growth-induced pattern formation and morphological evolution effectively. This study not only enhances our understanding of the growth-induced pattern selection and morphological evolution in spherical soft tissues, but also provides an inspiring insight for the fabrication of morphological patterns on curved surfaces.</p></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"284 ","pages":"Article 109720"},"PeriodicalIF":7.1,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241082","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

Multiple sub-impacts phenomenon and influences on responses of elastic-plastic beam 多重次撞击现象及其对弹塑性梁响应的影响

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2024-09-12 DOI: 10.1016/j.ijmecsci.2024.109721

Xiaoao Chen , Xiaochun Yin , Wenhao Xie , Hao Yuan , Liang Jiang , Changliang Wang , Hao Zhou , Junti Wang , Huaiping Ding , Hui Wang

{"title":"Multiple sub-impacts phenomenon and influences on responses of elastic-plastic beam","authors":"Xiaoao Chen , Xiaochun Yin , Wenhao Xie , Hao Yuan , Liang Jiang , Changliang Wang , Hao Zhou , Junti Wang , Huaiping Ding , Hui Wang","doi":"10.1016/j.ijmecsci.2024.109721","DOIUrl":"10.1016/j.ijmecsci.2024.109721","url":null,"abstract":"<div><p>The multiple sub-impact phenomenon, consisting of more than one short contact event, has frequently been observed in experiments and simulations. The multiple sub-impact phenomenon and its influences on impact responses lack systematic study. Hence, this paper presents a parametric analysis method, an extended hybrid, numerical-analytical model (EHNA model). The nature of multiple sub-impact responses of elastic-plastic beams struck by elastic-plastic spherical impactors is investigated parametrically. The occurrence and disappearance of multiple sub-impacts are observed. Their threshold curves are obtained and expressed analytically for low-velocity impacts. A characterization diagram is proposed to characterize the region of multiple sub-impacts in the relative stiffness ratio-effective mass ratio plane. The characterization diagram can be used to quickly predict the state of multiple sub-impacts or the state of a single impact without solving the impact responses in detail. It is validated experimentally and numerically for impacts with wide ranges of initial velocity, beam size, constraint, material property and contact type. The influences of multiple sub-impacts on impact force response, impact impulse, and energy loss are parametrically investigated. The high influence zones and several influence features are observed. The wide multiple sub-impact region proves that the multiple sub-impact phenomenon is ubiquitous. The strong influences on flexible beam impacts indicate that multiple sub-impacts cannot be neglected for structural damage and structural dynamics.</p></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"284 ","pages":"Article 109721"},"PeriodicalIF":7.1,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241100","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

Biaxially stretchable metamaterial absorber with a four-dimensional printed shape-memory actuator 带有四维印刷形状记忆致动器的双轴可拉伸超材料吸收器

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2024-09-11 DOI: 10.1016/j.ijmecsci.2024.109729

Sumin Bark , Heijun Jeong , Eiyong Park , Sungjoon Lim

{"title":"Biaxially stretchable metamaterial absorber with a four-dimensional printed shape-memory actuator","authors":"Sumin Bark , Heijun Jeong , Eiyong Park , Sungjoon Lim","doi":"10.1016/j.ijmecsci.2024.109729","DOIUrl":"10.1016/j.ijmecsci.2024.109729","url":null,"abstract":"<div><p>Among the various methods for strain sensing, the metamaterial absorbers (MMAs) stand out due to their dual capabilities. Specifically, MMAs facilitate the wireless detection of deformations in the target and operate independently of any external power source. However, conventional research has a limitation in that stretchable strain sensors are unable to deform themselves autonomously, which puts constraints on being efficiently utilised in special environments where human intervention is difficult. Herein, we propose a wireless, power-independent, biaxial strain sensor equipped with self-shape and frequency recovery capability that addresses the limitations of existing wireless strain sensors through the unprecedented integration of a 4D-printed shape memory actuator and a biaxially stretchable MMA. The novel integration with the shape memory actuator enables the stretchable MMA to autonomously recover to its original shape and absorption frequency after being heated to 70 °C for a few minutes. This smart functionality enables the resulting wireless strain sensor based on the proposed idea to revert to the original state when sensing a new target without requiring human intervention. The highly sensitive biaxial sensing capability is as follows. When stretched horizontally from 0 % to 30 %, the absorption frequency of the proposed biaxially stretchable MMA demonstrates a linear change from 9.75 GHz to 7.94 GHz, exhibiting a high sensitivity of 4.3 × 10^7 Hz/%. Similarly, when stretched vertically from 0 % to 30 %, the absorption frequency linearly changes from 7.35 GHz to 6.01 GHz, indicating a sensitivity of 5.9 × 10^7 Hz/%. Accordingly, the wireless biaxial sensing capability of the proposed stretchable MMA, as well as its shape-recovery functionality facilitated by the 4D-printed actuator are highly effective for remote strain measurement in environments where direct human involvement is impractical.</p></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"283 ","pages":"Article 109729"},"PeriodicalIF":7.1,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232559","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

A cross-level vibration prediction of USM stator under electron radiation 电子辐射下 USM 定子的跨级振动预测

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2024-09-11 DOI: 10.1016/j.ijmecsci.2024.109715

Zhibin Guo , Jihong Yan , Liyong Cao , Huazhi Chen , Jie Zhao

{"title":"A cross-level vibration prediction of USM stator under electron radiation","authors":"Zhibin Guo , Jihong Yan , Liyong Cao , Huazhi Chen , Jie Zhao","doi":"10.1016/j.ijmecsci.2024.109715","DOIUrl":"10.1016/j.ijmecsci.2024.109715","url":null,"abstract":"<div><p>Moving components exposed to electron radiation over longer durations are more prone to failure due to its complex changes from material properties to component characteristics. It involves multi-scale analysis, leading to current methods being deficient in accuracy and efficiency. In this paper, a cross-level vibration prediction method, which selects the ultrasonic motor (USM) stator as a typical component for Jupiter exploration, is proposed by incorporating the cross-scale changes of material properties based on the edge-based smoothed finite element method (ES-FEM). A cross-scale degradation model for exploring the material properties is constructed by establishing the correlation between the degradation of molecular chains and the mechanical properties of the epoxy resin. The ES-FEM is developed for investigating the vibration of the USM stator, by introducing the edge-based gradient smoothing technique (GST) to perform the strain smoothing operation in its stiffness matrix, offering superior accuracy and efficiency. The experiment of 1.2 MeV electron radiation under different electron fluences was carried out. It demonstrated that the present method can achieve higher accuracy and efficiency than the traditional one, while being closed to the experimental results with the frequency and amplitude errors of 0.03 % and 1.3 %, respectively.</p></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"284 ","pages":"Article 109715"},"PeriodicalIF":7.1,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241080","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