Acta Mechanica Solida Sinica最新文献_第2页

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

引用次数: 0

Mechanisms of Dynamic Compressive Damage and Post-thermal Degradation in 3D5d Braided Composites 3d - 5d编织复合材料动态压缩损伤与热后降解机理

IF 2.6 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-03-03 DOI: 10.1007/s10338-026-00718-9

Yong Chen, Zhiruo Chen, Du Huang, Shaowei Zhu, Jiayong Zhou, Liming Chen, Xuejuan Tao, Juncen Du

{"title":"Mechanisms of Dynamic Compressive Damage and Post-thermal Degradation in 3D5d Braided Composites","authors":"Yong Chen, Zhiruo Chen, Du Huang, Shaowei Zhu, Jiayong Zhou, Liming Chen, Xuejuan Tao, Juncen Du","doi":"10.1007/s10338-026-00718-9","DOIUrl":"10.1007/s10338-026-00718-9","url":null,"abstract":"<div><p>This study investigates the dynamic compressive mechanical properties and failure mechanisms of three-dimensional five-directional braided carbon/epoxy composites under both ambient and thermal degradation conditions. Dynamic impact tests were conducted at various strain rates using a split Hopkinson pressure bar. The results show a strong positive correlation between peak stress and strain rate, indicating a strain-rate sensitivity. The observed failure modes also depended on strain rate: at low strain rates, failure primarily involved fiber fracture and shear fracture; at medium strain rates, fiber dislocation and minor matrix cracking appeared; and at high strain rates, severe matrix cracking, extensive fiber fracture, and significant fiber-bundle loosening occurred. A macroscopic equivalent damage constitutive model incorporating a damage evolution criterion was established to simulate this behavior, and the simulation results agreed well with experimental data. After thermal exposure (200 °C, 230 °C, and 260 °C for 2 h), the composites exhibited significant matrix softening, with carbonization evident at 260 °C. The post-thermal stress–strain curves showed pronounced nonlinearity and plastic failure. Notably, overall damage severity—including increased fiber dislocation, fiber fracture, matrix cracking, and debonding—escalated with increasing exposure temperature, directly linking thermal degradation to worsened dynamic performance.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 7","pages":"948 - 961"},"PeriodicalIF":2.6,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613025","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

Topology Optimization Design of Graded Lattice Compliant Mechanisms Based on ICM Method 基于ICM方法的梯度点阵柔性机构拓扑优化设计

IF 2.6 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-03-03 DOI: 10.1007/s10338-026-00712-1

Nan Wei, Jicheng Li, Bingchuan Bian, Tao Song, Hongling Ye

{"title":"Topology Optimization Design of Graded Lattice Compliant Mechanisms Based on ICM Method","authors":"Nan Wei, Jicheng Li, Bingchuan Bian, Tao Song, Hongling Ye","doi":"10.1007/s10338-026-00712-1","DOIUrl":"10.1007/s10338-026-00712-1","url":null,"abstract":"<div><p>A collaborative topology optimization design method is proposed utilizing a surrogate model for the effective elastic properties of microstructures. The method optimizes graded lattice compliant mechanisms (GLCMs) to maximize target output displacement under volume constraints. First, the effective elastic properties of graded microstructures are calculated using homogenization theory, and a surrogate model is constructed via cubic polynomial fitting to link the macroscopic structure layout with microstructure selection. Subsequently, a collaborative topology optimization model for GLCMs is established and solved under volume constraints using the independent continuous mapping (ICM) method. Finally, the effectiveness of the present method for optimizing GLCMs is verified through a displacement inverter mechanism and a compliant flipping wing mechanism. The results demonstrate superior compliant performance of GLCMs over uniform lattice compliant mechanisms. The proposed collaborative topology optimization method offers insights into GLCMs design and advances the theoretical underpinnings of the ICM method.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 10","pages":"1468 - 1481"},"PeriodicalIF":2.6,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222729","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

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

Mode-II Delamination in Interlaminar Reinforced CFRP Laminates: Effect of Z-Pin Elastic Modulus 层间增强CFRP层合板的ii型分层：Z-Pin弹性模量的影响

IF 2.6 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-02-26 DOI: 10.1007/s10338-026-00716-x

Xinjian Chen, Yu Gong, Wenjuan Lin, Jianyu Zhang, Libin Zhao, Ning Hu

{"title":"Mode-II Delamination in Interlaminar Reinforced CFRP Laminates: Effect of Z-Pin Elastic Modulus","authors":"Xinjian Chen, Yu Gong, Wenjuan Lin, Jianyu Zhang, Libin Zhao, Ning Hu","doi":"10.1007/s10338-026-00716-x","DOIUrl":"10.1007/s10338-026-00716-x","url":null,"abstract":"<div><p>Z-pin reinforcement technology has been demonstrated to significantly enhance the interlaminar mechanical properties of composite materials. The reinforcement effect is influenced by several factors, including laminate architecture, mode mixity, and z-pin characteristics. This study investigates the effect of z-pin elastic modulus on the mode-II delamination behavior of composite laminates. Two types of z-pin-reinforced laminates were designed and fabricated, while unpinned laminates were used as control specimens. Mode-II delamination tests were performed using a 4ENF configuration. The results show that z-pinning markedly increases both the ultimate load and the fracture toughness of the laminates. An experimental mode-II <i>R</i>-curve was obtained, and the associated failure mechanisms were analyzed. The steady-state fracture toughness was higher for carbon fiber z-pinned specimens than for polyimide fiber z-pinned ones. Numerical simulations of the delamination were conducted by integrating a cohesive zone model with a bilinear constitutive law and a shear model implemented via nonlinear spring elements. The close agreement between simulated and experimental load–displacement curves confirms the accuracy of the numerical model. This work provides valuable theoretical insight and technical support for the application of z-pin reinforcement technology in advanced composite structures.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 7","pages":"1000 - 1011"},"PeriodicalIF":2.6,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614282","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

Residual Stress Evolution in Dual-Diaphragm MEMS Microphones During Fabrication and Packaging Processes 双膜片MEMS传声器在制造和封装过程中的残余应力演化

IF 2.6 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-02-26 DOI: 10.1007/s10338-026-00726-9

Hongjie Guo, Xiang Wu, Qiuhong Liu, Zhiqiang Chen, Zhengjin Wang

{"title":"Residual Stress Evolution in Dual-Diaphragm MEMS Microphones During Fabrication and Packaging Processes","authors":"Hongjie Guo, Xiang Wu, Qiuhong Liu, Zhiqiang Chen, Zhengjin Wang","doi":"10.1007/s10338-026-00726-9","DOIUrl":"10.1007/s10338-026-00726-9","url":null,"abstract":"<div><p>With the rapid advancement of electronic products, the market of micro-electro-mechanical systems (MEMS) microphones has grown significantly because of their high accuracy and miniaturization. Dual-diaphragm microphones are engineered to achieve a high signal-to-noise ratio; however, their complex structure gives rise to intricate residual stress patterns within the acoustic diaphragms and significantly impacts the sensitivity of MEMS microphones. In this study, finite element modeling is employed to investigate the distribution of residual thermal stress in the two diaphragms during fabrication and packaging. Key factors, including deposition and etching temperatures, material properties, and geometric parameters, are systematically analyzed. The results show that residual thermal stresses in the diaphragms are mainly accumulated during the fabrication process of the sensor, only mildly altered by the subsequent packaging process. Selecting appropriate material properties for the sacrificial layer and lowering the deposition temperature can significantly reduce the residual thermal stress. An adhesive layer with a low modulus further helps mitigate the residual thermal stress. This work uncovers the distribution law of residual thermal stress in dual-diaphragm MEMS microphones, providing practical guidance for improving microphone sensitivity and informing device design and fabrication.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 10","pages":"1507 - 1518"},"PeriodicalIF":2.6,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222735","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

Research on the Influence of Geometric Parameters of Bistable Triangular Structures on Stable State Transition Process 双稳三角形结构几何参数对稳态转换过程影响的研究

IF 2.6 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2026-02-26 DOI: 10.1007/s10338-026-00713-0

Jiarui Gao, Shujie Zhang, Yang Zhou, Hanqi Xie, Hongxiao Zhao, Weidong Yang

{"title":"Research on the Influence of Geometric Parameters of Bistable Triangular Structures on Stable State Transition Process","authors":"Jiarui Gao, Shujie Zhang, Yang Zhou, Hanqi Xie, Hongxiao Zhao, Weidong Yang","doi":"10.1007/s10338-026-00713-0","DOIUrl":"10.1007/s10338-026-00713-0","url":null,"abstract":"<div><p>This study proposes an innovative design methodology for bistable triangular composite laminates, establishing for the first time a quantitative relationship between geometric parameters and snap-through behavior. Nine triangular configurations with distinct geometric features were systematically generated by maintaining a constant base length while varying side length and vertex angle. Finite element analysis (FEA) models, rigorously validated against 3D-scanned prototypes, were employed to accurately compute the static equilibrium states of each configuration. Through comparative analysis of dual-point loading experiments and corresponding simulations, this research reveals for the first time unique evolution patterns during state transitions across different configurations (acute/right/obtuse triangles): obtuse configurations exhibit significant sensitivity to loading position, while acute configurations demonstrate more stable transition characteristics. The breakthrough enables predictive snap-through behavior based on geometric parameters, providing theoretical foundations and design guidelines for the precise placement of remotely controlled actuators.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 7","pages":"962 - 974"},"PeriodicalIF":2.6,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614283","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