Acta Mechanica Solida Sinica最新文献

An Inertia-Amplified Nonlinear Absorber for Robust Pulse Mitigation in Lightweight Structures 用于轻量化结构鲁棒脉冲抑制的惯性放大非线性吸收器

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-04-13 DOI: 10.1007/s10338-026-00722-z

Yi Yao, Mengxin He, Yat Sze Choy, Qian Ding

{"title":"An Inertia-Amplified Nonlinear Absorber for Robust Pulse Mitigation in Lightweight Structures","authors":"Yi Yao, Mengxin He, Yat Sze Choy, Qian Ding","doi":"10.1007/s10338-026-00722-z","DOIUrl":"10.1007/s10338-026-00722-z","url":null,"abstract":"<div><p>As a passive control technique, vibration absorption typically requires a certain mass to achieve effective energy transfer and dissipation, which limits its application in lightweight structures. To address this challenge, a novel nonlinear vibration absorber is proposed that exploits translation-rotation coupling to achieve low-frequency vibration absorption while maintaining a low added mass. The dynamic equations of the system are derived using Lagrange's equations, and the nonlinear characteristics are analyzed both analytically and numerically. The frequency-response near equilibrium is obtained via the harmonic balance method, confirming the softening nonlinearity of the absorber. Numerical simulations based on a two-story host structure are conducted to analyze the response under different excitation levels, and its vibration absorption performance is verified. Comparative studies confirm that, for the same auxiliary mass, the proposed absorber achieves superior mitigation and robustness compared with a conventional tuned mass damper. Parameter optimization via the genetic algorithm further enhances performance and ensures robustness across various excitations. These findings highlight the potential of inertia-amplified nonlinear absorbers as a lightweight and reliable solution for pulse mitigation in engineering structures.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 4","pages":"455 - 465"},"PeriodicalIF":2.7,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147733112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Preface to the Special Issue on Celebrating the 130th Anniversary of Tianjin University 《庆祝天津大学130周年校庆特刊》前言

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-04-02 DOI: 10.1007/s10338-026-00746-5

Yue-Sheng Wang, Liao-Liang Ke

引用次数: 0

Review on Advances in Picosecond Laser Ultrasonics for Mechanics 皮秒激光超声力学研究进展综述

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-03-31 DOI: 10.1007/s10338-026-00743-8

Jinyu Yan, Lin’an Li, Yantao Zeng, Kai Chen, Lipan Xin, Shibin Wang, Zhiyong Wang, Chuanwei Li

引用次数: 0

A Brief Review on Recent Progress of Surface Instabilities in Film–Substrate Systems 薄膜-衬底体系表面不稳定性研究进展综述

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-03-23 DOI: 10.1007/s10338-026-00727-8

Zhenwei Liu, Yang Liu

{"title":"A Brief Review on Recent Progress of Surface Instabilities in Film–Substrate Systems","authors":"Zhenwei Liu, Yang Liu","doi":"10.1007/s10338-026-00727-8","DOIUrl":"10.1007/s10338-026-00727-8","url":null,"abstract":"<div><p>Surface instability, or wrinkling, in film–substrate structures is a pervasive phenomenon in both biological systems and engineering applications, representing a frontier area in soft matter mechanics. This short review summarizes recent advances in theoretical modeling, numerical simulations, and experimental investigations of wrinkling phenomena. We cover a wide range of systems, from half-space to planar film–substrate structures and more complex curved core–shell configurations. The review details the mechanical mechanisms underlying wrinkling initiation, post-buckling evolution, and pattern transitions under diverse loading conditions, including uniaxial and biaxial compression, growth, and swelling, as well as external fields such as thermal, electric, and magnetic stimuli. We place particular emphasis on emerging systems, including multilayer structures, intelligent materials, and functionally graded materials. Furthermore, we highlight the practical applications of wrinkle analysis in biological tissue morphogenesis, flexible electronics, and the characterization of micro- and nano-scale mechanical properties. Additionally, we emphasize studies that employ the exact theory of nonlinear elasticity, clarifying its advantages and necessity in different scenarios. This review provides a comprehensive overview of the state of the art of this active field and outlines promising directions for future research.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 4","pages":"433 - 454"},"PeriodicalIF":2.7,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147733072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Moving Contact of a Viscoelastic FGM-Coated Half-Plane Under Rigid Flat and Cylindrical Punches 粘弹性fgm涂层半平面在刚性扁、圆柱冲头作用下的运动接触

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-03-18 DOI: 10.1007/s10338-026-00711-2

Xiaomin Wang, Jie Su, Junhong Guo, Sami El-Borgi

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Optimizing Energy Efficiency in Tunnel Boring Machine Rock Breaking via Multi-source Data Fusion 基于多源数据融合的隧道掘进机破岩节能优化

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-02-27 DOI: 10.1007/s10338-026-00714-z

Xiaojun Yan, Wencong Qi, Chuan Qu, Minghui Ma, Shanglin Liu, Qian Zhang, Xuesong Cheng

{"title":"Optimizing Energy Efficiency in Tunnel Boring Machine Rock Breaking via Multi-source Data Fusion","authors":"Xiaojun Yan, Wencong Qi, Chuan Qu, Minghui Ma, Shanglin Liu, Qian Zhang, Xuesong Cheng","doi":"10.1007/s10338-026-00714-z","DOIUrl":"10.1007/s10338-026-00714-z","url":null,"abstract":"<div><p>The era of big data has profoundly transformed mechanics research, with data-driven approaches playing a vital role in modeling and optimization. This study focuses on tunnel boring machine (TBM), where the thrust-torque ratio is a key determinant of their tunneling energy efficiency. However, due to the complexity of experiments and the testing requirements, obtaining sufficient high-quality data under varying geological conditions remains a major challenge in optimizing the tunneling energy efficiency of TBM. To address this, multi-cutter rotary cutting machine experiments and numerical simulations were conducted on 22 different rock types. Comprehensive datasets of normal and rolling forces were systematically collected. Using specific energy (SE) as the rock-breaking efficiency metric, we integrated physical and numerical data through a CatBoost-based fusion framework. The predictive model was initially trained on simulation data to capture the relationships among penetration, uniaxial compressive strength, tensile strength, and SE, and was subsequently fine-tuned with experimental data to develop the final fused model. Compared to models trained solely on experimental or simulated data, the fused model reduced RMSE by 37.1% and 58.6%, respectively, and improved R<sup>2</sup> by 19.0% and 44.6%, thereby enhancing both prediction accuracy and generalization capability. Furthermore, Bayesian optimization was employed to minimize SE and identify the optimal penetration. The results indicate that as rock strength increases, the optimal penetration decreases, while the corresponding minimal SE increases. These findings provide theoretical and engineering insights for improving TBM energy efficiency and parameter optimization, while establishing a robust data fusion framework for mechanical data analysis.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 4","pages":"481 - 493"},"PeriodicalIF":2.7,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147733122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Theory and Manipulation of Flexural Waves 弯曲波的理论和操作

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-02-26 DOI: 10.1007/s10338-026-00720-1

Feng Liu, Liyun Cao, Xiao-Lei Tang, Yan-Feng Wang, Yue-Sheng Wang

{"title":"Theory and Manipulation of Flexural Waves","authors":"Feng Liu, Liyun Cao, Xiao-Lei Tang, Yan-Feng Wang, Yue-Sheng Wang","doi":"10.1007/s10338-026-00720-1","DOIUrl":"10.1007/s10338-026-00720-1","url":null,"abstract":"<div><p>Flexural waves constitute a fundamental class of elastic waves in thin structures and play a central role in vibration, noise, and energy transport across a wide range of engineering systems. This review provides a comprehensive overview of the theoretical foundations and manipulation strategies of flexural waves. We begin with the classical Kirchhoff–Love plate theory and related models, dispersion characteristics, and range of validity. Building on this foundation, we summarize recent advances in flexural-wave manipulation using elastic metasurfaces, which enable anomalous reflection, wavefront shaping, and mode conversion through subwavelength structural design. We further highlight emerging developments in topological physics and bound states in the continuum (BICs) within flexural wave systems, including defect-immune transport governed by lattice topology, non-radiating embedded modes, and high-quality (high-<i>Q</i>) factor resonances. These approaches illustrate the rapid evolution of flexural waves from classical vibration theory to a modern multidisciplinary field. The review concludes by outlining key challenges and promising research directions, including integrated wave-control strategies and emerging concepts for next-generation flexural-wave devices.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 4","pages":"402 - 432"},"PeriodicalIF":2.7,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147733130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Structural Design and Performance Analysis of a Deep-Learning-Based Adaptive Variable-Stiffness Lower-Limb Rehabilitation Exoskeleton 基于深度学习的自适应变刚度下肢康复外骨骼结构设计与性能分析

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-02-24 DOI: 10.1007/s10338-026-00717-w

Yingnan Wang, Chenxi Wang, Zhixia Wang, Boxun Tao, Wei Wang

{"title":"Structural Design and Performance Analysis of a Deep-Learning-Based Adaptive Variable-Stiffness Lower-Limb Rehabilitation Exoskeleton","authors":"Yingnan Wang, Chenxi Wang, Zhixia Wang, Boxun Tao, Wei Wang","doi":"10.1007/s10338-026-00717-w","DOIUrl":"10.1007/s10338-026-00717-w","url":null,"abstract":"<div><p>With the continuous advancement of global rehabilitation technologies, home-based lower-limb rehabilitation exoskeletons have demonstrated broad application prospects due to their low cost and high convenience. However, significant inter-patient variability, the complex and dynamic nature of the rehabilitation process, and the time-varying characteristics of knee joint torque present major challenges for these exoskeletons in accurately matching torque demands during training. Designing scientifically-grounded, personalized rehabilitation programs and precisely regulating training intensity in home settings remains a highly complex and challenging task. To address this challenge, we propose a home-use knee health monitoring system (KHMS) grounded in embodied intelligence, featuring three key innovations: (i) a four-bar variable-stiffness mechanism that provides adjustable stiffness over 10–40 N·m/rad; (ii) a self-powered electromagnetic module that delivers a stable 3.4 V output to reliably energize low-power wireless sensors; and (iii) an LSTM-based adaptive monitoring model that estimates knee joint torque with 95.36% accuracy and supports continuous rehabilitation-state tracking. By enabling real-time assessment and data-driven personalization based on individual recovery trajectories, the proposed KHMS facilitates scientifically grounded home training with precise intensity regulation. Overall, this work advances practical, portable rehabilitation devices that can meet community-level rehabilitation needs and promote the development of low-power artificial intelligence.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 4","pages":"466 - 480"},"PeriodicalIF":2.7,"publicationDate":"2026-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147733124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Shear-Lag Model for the Pullout Behavior of Pre-twisted Straight Fibers and Its Application in the Toughening Analysis of Twisted Fiber-Reinforced Composites 预扭直纤维拉拔行为的剪切滞后模型及其在扭转纤维增强复合材料增韧分析中的应用

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-01-26 DOI: 10.1007/s10338-025-00692-8

Jiajun Dong, Shiyang Liu, Xiaofei Wang, Qinghua Qin, Jianshan Wang

{"title":"A Shear-Lag Model for the Pullout Behavior of Pre-twisted Straight Fibers and Its Application in the Toughening Analysis of Twisted Fiber-Reinforced Composites","authors":"Jiajun Dong, Shiyang Liu, Xiaofei Wang, Qinghua Qin, Jianshan Wang","doi":"10.1007/s10338-025-00692-8","DOIUrl":"10.1007/s10338-025-00692-8","url":null,"abstract":"<div>\u0000 \u0000 <p>The pre-twisted straight fiber exhibits exceptional mechanical properties, including high tensile stiffness and remarkable flexibility. In applications such as artificial muscles and fiber-reinforced composites, these fibers are typically embedded in an elastic matrix, functioning as key reinforcing or deformation-driven structural components. In this study, a shear-lag-based model is developed to describe the pullout behavior of a pre-twisted straight fiber from an elastic matrix, incorporating geometric nonlinearity and tension–twist coupling induced by large pre-twist angles. Based on this model, the stress transfer mechanism between the twisted straight fiber and the surrounding matrix is systematically analyzed. Furthermore, the derived force–displacement relationship during fiber pullout is employed to perform crack-bridging analysis, revealing the toughening mechanisms in twisted fiber-reinforced composites. Results show that pre-twist of fiber introduces distinct tension–twist coupling, which generates hoop interfacial shear stresses and allows the fiber to undergo larger tensile deformation. It leads to greater crack-opening displacements in the bridging zone and a significantly enhanced toughening effect. The present work provides new insights into the stress transfer and toughening mechanisms of twisted fiber-reinforced composites, offering valuable guidance for the design and fabrication of high-performance composite materials.</p>\u0000 </div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 4","pages":"534 - 543"},"PeriodicalIF":2.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147733131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Diamond-Shaped Shrinking Device by Elastic Wave Metamaterial Plate and Active Control 弹性波超材料板及主动控制菱形收缩装置

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-01-15 DOI: 10.1007/s10338-025-00697-3

Li Ning, Gui-Jiao Wu, Yu-Xing Sun, Yang-Mian Wang, Peng Wang, Yi-Ze Wang

引用次数: 0