International Journal of Mechanical Sciences最新文献_第7页

An untethered magnetic field-driven polishing method for internal surfaces 一种用于内部表面的非系留磁场驱动抛光方法

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences

Pub Date : 2026-01-03 DOI: 10.1016/j.ijmecsci.2026.111183

Haocheng Wang, Xiaoqin Zhou, Qiang Liu, Rongqi Wang, Xiuzhi He

Internal surface finishing of hard and brittle optical components is challenging owing to the limited tool accessibility and uneven material removal. In this study, an untethered magnetic field-driven polishing method was designed to address these limitations. The proposed method employs an external rotating magnetic field to drive an untethered magnetic polishing tool suspended in a stiffened magnetorheological slurry, eliminating mechanical constraints. To ensure controllability and predictability, the motion states of the untethered tool under time-varying magnetic fields were extensively analyzed. A time-dependent material removal model was established based on Greenwood’s contact theory and Preston’s equation, enabling direct prediction of polishing profiles. According to the experimental results, the proposed method achieved a material removal rate of up to 1.24

μ

m/min and reduced surface roughness by

>

99%, with the post-processed roughness of 3.24 nm. The predicted polishing profiles agreed closely with experimental measurements, with coefficient of determination of 0.8564–0.9969. Overall, the proposed approach provides a reliable and efficient solution for high-quality internal surface polishing with clear motion-state analysis and accurate profile prediction.

由于刀具可及性有限和材料去除不均匀，硬脆光学元件的内表面精加工具有挑战性。在这项研究中，设计了一种无系绳磁场驱动抛光方法来解决这些限制。该方法采用外部旋转磁场驱动悬浮在硬化磁流变液中的无系留磁性抛光工具，消除了机械约束。为了保证非拴工具在时变磁场下的可控性和可预测性，对其运动状态进行了广泛的分析。基于Greenwood接触理论和Preston方程建立了随时间变化的材料去除模型，实现了抛光轮廓的直接预测。实验结果表明，该方法的材料去除率高达1.24 μm/min，表面粗糙度降低了99%，后处理粗糙度为3.24 nm。预测的抛光轮廓与实验结果吻合较好，决定系数为0.8564 ~ 0.9969。总体而言，该方法具有清晰的运动状态分析和精确的轮廓预测，为高质量的内表面抛光提供了可靠、高效的解决方案。

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引用次数: 0

Predicting centrifugally-driven lubricant outflow from porous bearing cages 预测离心驱动的润滑剂从多孔轴承保持架流出

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences

Pub Date : 2026-01-03 DOI: 10.1016/j.ijmecsci.2026.111184

Xiangyu Feng, Pengzhe Zhu, Wenzhong Wang

Aerospace bearings in spacecraft mechanisms require decades of autonomous operation under extreme conditions, making precise control of lubricant release from porous bearing cages essential. However, predicting this release behavior remains a significant challenge. This study develops a two-scale predictive framework derived from Navier-Stokes equations for centrifugally-driven lubricant outflow, encompassing both pore-scale and macroscale criteria. A characteristic parameter for quantifying the lubricant outflow state within porous cages was developed, which is governed by seven controlling parameters: pore size, rotation speed, rotation radius, lubricant density, surface tension, characteristic contact angle, and characteristic channel length. Validation through finite element simulations, centrifugal experiments, and literature data demonstrates strong agreement between predictions and observations. The resulting phase diagrams provide systematic design guidance for aerospace bearing cages, enabling the determination of outflow speeds and optimization of pore structures for specific operational requirements. This physics-based approach establishes the theoretical foundation and practical tools essential for next-generation aerospace bearing systems.

航天器机构中的航空航天轴承需要在极端条件下自主运行数十年，因此精确控制多孔轴承保持架中的润滑剂释放至关重要。然而，预测这种释放行为仍然是一个重大的挑战。本研究开发了一个双尺度的预测框架，该框架来源于Navier-Stokes方程，用于离心驱动的润滑剂流出，包括孔隙尺度和宏观尺度标准。建立了一个定量表征多孔笼内润滑剂流出状态的特征参数，该参数由孔径、转速、旋转半径、润滑剂密度、表面张力、特征接触角和特征通道长度7个控制参数决定。通过有限元模拟、离心实验和文献数据验证了预测和观测之间的强烈一致性。由此产生的相图为航空航天轴承保持架提供了系统的设计指导，能够确定流出速度并优化特定操作要求的孔隙结构。这种基于物理的方法为下一代航空航天轴承系统建立了必不可少的理论基础和实用工具。

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引用次数: 0

Nonlinear interplay in forced vibration of fiber-reinforced composite plates 纤维增强复合材料板受迫振动中的非线性相互作用

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences

Pub Date : 2026-01-03 DOI: 10.1016/j.ijmecsci.2026.111193

Xiaofeng Liu , Yan Li , Wei Sun

Predicting the forced vibration of fiber-reinforced composite thin-walled structures under large excitations is challenging, primarily due to the synergistic interaction between material nonlinearity and geometric nonlinearity. This study develops an efficient nonlinear dynamic model that concurrently integrates both nonlinearities within a unified semi-analytical framework. The model's accuracy is demonstrated through rigorous validation against finite element analysis and experimental tests, significantly improving response prediction over models considering material nonlinearity alone. A bidirectional time-domain sweep technique is presented, characterizing complex nonlinear dynamical behaviors, which include jump-up, jump-down, and frequency hysteresis. The core discovery is the mechanistic elucidation that geometric nonlinearity significantly elevates the global strain field, which in turn dramatically amplifies the composite's intrinsic strain-dependent damping capacity. This strain-amplification effect is identified as the direct cause of the significant suppression in normalized vibration amplitude observed under increasing excitation. The presented methodology provides a validated tool and fundamental insights for the analysis and vibration-resistant design of composite structures operating in nonlinear regimes.

由于材料非线性和几何非线性之间的协同作用，预测纤维增强复合材料薄壁结构在大激励下的强迫振动具有挑战性。本研究开发了一种有效的非线性动态模型，在统一的半解析框架内同时集成了这两种非线性。通过对有限元分析和实验测试的严格验证，该模型的准确性得到了证明，与仅考虑材料非线性的模型相比，显著提高了响应预测。提出了一种双向时域扫描技术，该技术表征了复杂的非线性动力学行为，包括跳升、跳降和频率滞后。核心发现是几何非线性显著提高整体应变场的机理说明，这反过来又显著放大了复合材料的固有应变相关阻尼能力。这种应变放大效应被认为是在增加激励下观察到的归一化振动幅度显著抑制的直接原因。所提出的方法为非线性复合材料结构的分析和抗振设计提供了一种有效的工具和基本见解。

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引用次数: 0

Non-uniform residual tool mark errors in diamond end-fly-cutting microstructures 金刚石末端飞切微结构中残留刀痕误差不均匀

IF 7.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences

Pub Date : 2026-01-03 DOI: 10.1016/j.ijmecsci.2026.111148

Jianpeng WANG, Zejia Zhao, Ling Ling Chen, Linhe Sun, Tengfei Yin, Suet To

引用次数: 0

Adhesion and deformation mechanism of optical-glass in precision molding 精密成型光学玻璃的粘著与变形机理

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences

Pub Date : 2026-01-03 DOI: 10.1016/j.ijmecsci.2026.111191

Xiaodong Huang , Asit Kumar Gain , Liangchi Zhang , Zhen Li

Precision glass molding (PGM) has become a key manufacturing technology for producing optical glass components with complex geometries for high-performance applications. However, the fundamental mechanisms governing adhesion during thermal demolding remain insufficiently understood, hindering process optimization and the assurance of surface integrity. This study establishes an integrated framework that couples a novel cohesive zone model (CZM) with finite element analysis (FEA) to quantitatively characterize the interfacial behavior between BK7 glass and tungsten carbide (WC) molds under thermo-mechanical loading. The results show that both adhesion forces and residual stresses are highly sensitive to molding temperature and applied load, while the interfacial adhesion strength and cohesive damage evolution are predominantly governed by the debonding temperature. The analysis further reveals that the interaction between adhesion and stress localization, particularly at the periphery of the adhesion zone, is strongly affected by glass flow dynamics. These theoretical insights are thoroughly validated through experiments. Overall, the findings provide a deeper mechanistic understanding that supports the optimal design and control of PGM processes.

精密玻璃模压（PGM）已成为生产具有复杂几何形状的高性能光学玻璃元件的关键制造技术。然而，在热脱模过程中控制粘附的基本机制仍然不够清楚，阻碍了工艺优化和表面完整性的保证。本研究建立了一个集成框架，将一种新的粘聚区模型（CZM）与有限元分析（FEA）相结合，以定量表征热机械载荷下BK7玻璃与碳化钨（WC）模具之间的界面行为。结果表明：黏附力和残余应力对成型温度和外加载荷高度敏感，而界面黏附强度和黏附损伤演变主要受剥离温度的控制；分析进一步表明，粘附和应力局部化之间的相互作用，特别是在粘附区外围，受到玻璃流动动力学的强烈影响。这些理论见解通过实验得到了彻底的验证。总的来说，这些发现提供了更深层次的机制理解，支持PGM过程的优化设计和控制。

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引用次数: 0

Design of conformal gradient heterogeneous lattices via bidirectional isoparametric mapping 基于双向等参映射的共形梯度非均匀格的设计

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences

Pub Date : 2026-01-03 DOI: 10.1016/j.ijmecsci.2026.111176

Cong Ai , Changdong Zhang , Kanghui Song, Xinze Shen, Dawei Li, Wenhe Liao, Tingting Liu

The application of lightweight lattice structures to complex curved surfaces is hindered by a geometric mismatch with traditional orthogonal arrays, leading to boundary incompatibility and performance degradation. Inspired by the microstructure of human bone, this study proposes a parallel design method integrating bidirectional isoparametric mapping and topology optimization to construct 3D conformal gradient heterogeneous lattice structures, which realizes the synchronous optimization of the geometric shape of the lattice structure and the conformal distribution characteristics of the macro curved surface. The core of the proposed method lies in the synergy between physical drivers and geometric mapping. Through compliance minimizing topology optimization combined with stress information intelligent selection, the density and configuration fields are obtained. Following data transfer via multi-scale mapping, orthogonal gradient heterogeneous lattices are generated in the parametric space and inversely mapped to ultimately form 3D conformal gradient heterogeneous lattice structures through bidirectional isoparametric transformation. Through the design, manufacturing, and experimental testing of semicircular beams and spacecraft re-entry capsule shells, the results demonstrate that compared with the traditional orthogonal uniform lattice structures, the structure optimized by this method has its stiffness and energy absorption performance improved by 275.9 % and 86.6 % respectively under the condition of maintaining basically stable strength. This work establishes a unified automated workflow for synchronizing geometry with performance-driven material distribution, providing significant progress for manufacturing high-performance lightweight lattice structures with complex geometers.

轻质点阵结构在复杂曲面上的应用受到与传统正交阵列的几何不匹配的阻碍，从而导致边界不相容和性能下降。受人骨微观结构的启发，本研究提出了一种结合双向等参映射和拓扑优化构建三维共形梯度异质晶格结构的并行设计方法，实现了晶格结构几何形状与宏观曲面共形分布特征的同步优化。该方法的核心在于物理驱动和几何映射之间的协同作用。通过柔度最小化拓扑优化与应力信息智能选择相结合，得到了结构的密度场和构形场。通过多尺度映射传输数据后，在参数空间中生成正交梯度异质晶格，并通过双向等参变换进行反向映射，最终形成三维共形梯度异质晶格结构。通过对半圆梁和航天器返回舱壳体的设计、制造和试验测试，结果表明：与传统的正交均匀点阵结构相比，该方法优化后的结构在保持强度基本稳定的情况下，刚度和吸能性能分别提高了275.9%和86.6%。这项工作建立了一个统一的自动化工作流程，用于同步几何形状与性能驱动的材料分布，为制造具有复杂几何形状的高性能轻质点阵结构提供了重大进展。

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引用次数: 0

Piezoelectric metamaterial curved beams with feedback control for manipulating bandgaps 带隙反馈控制的压电超材料弯曲梁

IF 7.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences

Pub Date : 2026-01-03 DOI: 10.1016/j.ijmecsci.2026.111175

Jie Xu, Youqi Zhang, Mehrdad Negahban, Weihan Wang, Zheng Li

引用次数: 0

Coupled thermo-chemo-mechanical phase field-based modelling of hydrogen-assisted cracking in girth welds 基于热-化学-力学相场耦合的环焊缝氢辅助开裂模型

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences

Pub Date : 2026-01-03 DOI: 10.1016/j.ijmecsci.2026.111172

Lucas Castro , Yousef Navidtehrani , Covadonga Betegón , Emilio Martínez-Pañeda

A new computational framework is presented to predict the structural integrity of welds in hydrogen transmission pipelines. The framework combines: (i) a thermo-mechanical weld process model, and (ii) a coupled deformation-diffusion-fracture phase field-based model that accounts for plasticity and hydrogen trapping, considering multiple trap types, with stationary and evolving trap densities. This enables capturing, for the first time, the interplay between residual stresses, trap creation, hydrogen transport, and fracture. The computational framework is particularised and applied to the study of weld integrity in X80 pipeline steel. The focus is on girth welds, as they are more complex due to their multi-pass nature. The weld process model enables identifying the dimensions and characteristics of the three weld regions: base metal, heat-affected zone, and weld metal, and these are treated distinctively. This is followed by virtual fracture experiments, which reveal a very good agreement with laboratory studies. Then, weld pipeline integrity is assessed, estimating critical failure pressures for a wide range of scenarios. Of particular interest is to assess the structural integrity implications of welding defects present in existing natural gas pipelines under consideration for hydrogen transport: pores, lack of penetration, imperfections, lack of fusion, root contraction, and undercutting. The results obtained in hydrogen-containing environments reveal an important role of the weld microstructure and the detrimental effect of weld defects that are likely to be present in existing natural gas pipelines, as they are considered safe in gas pipeline standards.

提出了一种预测输氢管道焊缝结构完整性的计算框架。该框架结合了：(i)热-机械焊接过程模型，以及（ii）考虑塑性和氢捕获的耦合变形-扩散-断裂相场模型，考虑了多种陷阱类型，以及固定和不断变化的陷阱密度。这使得首次捕捉到残余应力、圈闭形成、氢输运和破裂之间的相互作用。将该计算框架具体应用于X80管线钢焊缝完整性的研究。重点是环焊缝，因为它们更复杂，由于他们的多道性质。焊接过程模型能够识别三个焊接区域的尺寸和特征：母材、热影响区和焊缝金属，并对这些区域进行不同的处理。随后进行了虚拟断裂实验，结果与实验室研究结果非常吻合。然后，评估焊接管道的完整性，估计各种情况下的临界失效压力。特别感兴趣的是评估现有天然气管道在考虑氢气输送时存在的焊接缺陷的结构完整性影响：气孔、缺乏渗透、缺陷、缺乏融合、根部收缩和破坏。在含氢环境中获得的结果揭示了焊缝微观结构的重要作用，以及现有天然气管道中可能存在的焊缝缺陷的有害影响，因为它们在天然气管道标准中被认为是安全的。

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引用次数: 0

Linearized vibration analysis of tensegrity structures in rigid-body space 刚体空间张拉整体结构的线性化振动分析

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences

Pub Date : 2026-01-03 DOI: 10.1016/j.ijmecsci.2026.111178

Yihang Wang, Jingfeng He, Xin Li, Yuheng Gao, Hongzhou Jiang, Hui Zhang

This study presents a unified linearized vibration analysis framework for tensegrity structures that explicitly incorporates both constraint-induced geometric stiffness and gravity-induced stiffness. This approach addresses small, undamped free vibrations around a prestressed equilibrium, models compressive members as rigid bodies, and describes the system dynamics within a screw-theoretic formulation. By considering the effect of geometric constraints on the number of independent rigid-body coordinates, the tensegrity structures were classified into unconstrained and constrained cases for analysis. For unconstrained systems, the mass and stiffness matrices are derived analytically from the Jacobian and Hessian equations of cable-rigid-body interactions, whereas gravity-induced stiffness arises naturally from the screw-theoretic representation of gravitational wrenches. For constrained systems, the constraint Jacobian projects the linearized dynamics into an independent coordinate space, in which geometric constraints additionally contribute a reduced-space geometric stiffness term. The effectiveness and generality of the framework are demonstrated through three examples. Two numerical cases verified its applicability to general tensegrity structures—including generalized compressive members, continuous cables, and class k configurations. An experimental study on a biomimetic tensegrity leg with revolute joints, inextensible cables, and closed-chain constraints further validates the formulation. Across the 0.1–4 Hz frequency range, discrepancies between the identified and computed modal frequencies remain within 0.1–4.9%, confirming the accuracy and robustness of the proposed method. Collectively, the numerical and experimental results show that constraints and gravity play a critical role in shaping the vibration characteristics of tensegrity structures.

本研究提出了一个统一的线性化振动分析张拉整体结构框架,明确了导致几何刚度和gravity-induced刚度。该方法解决了围绕预应力平衡的小的、无阻尼的自由振动，将压缩构件建模为刚体，并在螺杆理论公式中描述系统动力学。考虑几何约束对独立刚体坐标数的影响，将张拉整体结构分为无约束和约束两种情况进行分析。对于无约束系统，质量和刚度矩阵由索-刚体相互作用的雅可比方程和Hessian方程解析导出，而重力诱导刚度则由重力扳手的螺旋理论表示自然产生。约束系统线性化动力学约束雅可比矩阵项目到一个独立坐标空间中几何约束另外贡献了的空间几何刚度。通过三个算例验证了该框架的有效性和通用性。两个数值实例验证了其对一般张拉整体结构的适用性，包括广义压缩构件、连续索和k类结构。对具有旋转关节、不可伸缩索和闭链约束的仿生张拉整体腿的实验研究进一步验证了该公式。在0.1-4 Hz频率范围内，识别和计算的模态频率之间的差异保持在0.1-4.9%，证实了所提出方法的准确性和鲁棒性。数值和实验结果表明，约束和重力对张拉整体结构的振动特性起着至关重要的作用。

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引用次数: 0

Nonlinear vibration control of smart-composite-panels: Dynamic modeling and experimental testing 智能复合材料面板非线性振动控制：动力学建模与实验测试

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences

Pub Date : 2026-01-03 DOI: 10.1016/j.ijmecsci.2026.111199

Yu Zhang , Hui Zhang , Hongwei Ma , Wei Sun , Dongxu Du , Kunpeng Xu , Hui Li

Fiber-reinforced composite panels are widely used in modern industrial fields. However, they are prone to geometric nonlinear vibrations under external loads during service, leading to reduced structural accuracy and fatigue damage. This study focuses on smart composite panels (SCPs) embedded with macro-fiber composites (MFCs) to investigate nonlinear vibration control. Firstly, a semi-analytical nonlinear dynamic model of the SCP is established based on the von-Karman large-deformation theory and the first-order shear deformation theory. The nonlinear solution is realized using the Newmark-beta scheme combined with the Newton-Raphson iterative method. Secondly, an extended state observer (ESO)-nonlinear feedback control (NFC) hybrid controller is designed. The cubic stiffness disturbance is offset by a cubic error compensation term, and the ESO estimates the system state quantities and comprehensive disturbances, thereby addressing sensor limitations and signal noise. Finally, nonlinear vibration and active vibration control tests are conducted. The experimental results show that the proposed controller exhibits excellent control performance and can effectively suppress nonlinear harmonic components. This study fills the gap in nonlinear dynamic modeling and experimental testing of SCPs, providing technical support for ensuring the safe service of related structures.

纤维增强复合板广泛应用于现代工业领域。然而，它们在使用过程中容易受到外部载荷的几何非线性振动，导致结构精度降低和疲劳损伤。本文以嵌入宏纤维复合材料的智能复合材料面板为研究对象，研究其非线性振动控制问题。首先，基于von-Karman大变形理论和一阶剪切变形理论，建立了SCP的半解析非线性动力模型；采用Newmark-beta格式结合Newton-Raphson迭代法实现非线性解。其次，设计了一种扩展状态观测器(ESO)-非线性反馈控制（NFC）混合控制器。三次刚度扰动被三次误差补偿项抵消，ESO估计系统状态量和综合扰动，从而解决传感器限制和信号噪声问题。最后进行了非线性振动和主动振动控制试验。实验结果表明，该控制器具有良好的控制性能，能有效抑制非线性谐波分量。本研究填补了悬架非线性动力学建模和试验测试方面的空白，为保障相关结构的安全使用提供技术支持。

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引用次数: 0