Thin-Walled Structures最新文献_第7页

Flexible tuning mechanical and mass transfer properties of TPMS magnesium alloy scaffolds via multidirectional reconstruction strategy 通过多向重构策略柔性调整TPMS镁合金支架的力学和传质性能

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2025-12-23 DOI: 10.1016/j.tws.2025.114441

Ruobing Liao , Ruiqi Pan , Chunlin Zuo , Haisong Liang , Zihong Mai , Jie Yin , Shiyue Guo , Haodong Wang , Lawrence E. Murr , Kun Li

Bone‐tissue scaffolds intended for clinical use must provide both appropriate modulus and efficient mass transport, yet achieving these competing requirements within a single structure remains challenging. Triply periodic minimal surface (TPMS) scaffolds possess continuous curvature and interconnected pores, but their geometry is typically governed by implicit mathematical functions with limited tunable parameters, restricting systematic optimization of structure–property relationships. This study presents a multidirectional reconstruction strategy that redefines TPMS isosurfaces through direct functional modification and topological transformation, thereby enlarging the accessible design space. The approach enables precise control of pore interconnectivity, aperture size and unit morphology, offering independent adjustment of mechanical and transport characteristics. Reconstructed Gyroid (RG) scaffolds were fabricated as a model system to evaluate the method. Parametric studies demonstrate that reconstruction variables strongly influence both elastic modulus and permeability. To further exploit this expanded design freedom, an artificial-neural-network–assisted multi-objective particle swarm optimization framework was employed, allowing simultaneous optimization of strength and permeability. The optimized RG scaffolds achieved elastic moduli of 2.12–4.74 GPa and permeability of 6.17 × 10⁻⁹–9.62 × 10⁻⁸ m², values consistent with human trabecular bone. The proposed strategy provides a generalizable route for designing magnesium-alloy TPMS scaffolds with tunable mechanical and mass-transfer properties, supporting their application in load-bearing bone regeneration.

用于临床的骨组织支架必须提供适当的模量和有效的质量运输，然而在单一结构中实现这些相互竞争的要求仍然具有挑战性。三周期最小表面（TPMS）支架具有连续的曲率和相互连接的孔隙，但其几何结构通常由具有有限可调参数的隐式数学函数控制，限制了结构-性能关系的系统优化。本研究提出了一种多向重构策略，通过直接的功能修改和拓扑转换来重新定义TPMS等值面，从而扩大可达设计空间。该方法可以精确控制孔隙互连性、孔径大小和单元形态，并提供机械和运输特性的独立调整。以重构Gyroid （RG）支架为模型系统，对该方法进行了评价。参数化研究表明，重建变量对弹性模量和渗透率均有较大影响。为了进一步利用这种扩展的设计自由度，采用了人工神经网络辅助的多目标粒子群优化框架，允许同时优化强度和渗透率。优化后的RG支架的弹性模量为2.12-4.74 GPa，通透性为6.17 × 10⁻⁸-9.62 × 10⁻⁸m²，与人类小梁相吻合。该策略为设计具有可调力学和传质性能的镁合金TPMS支架提供了一种可推广的途径，支持其在负重骨再生中的应用。

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引用次数: 0

Thread-pulling-induced assembly strategy for complex 3D structures 复杂三维结构的线拉诱导装配策略

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2025-12-23 DOI: 10.1016/j.tws.2025.114434

Yuehan Wei , Huijie Cao , Zengyao Lv , Zhenjia Tang , Zhaoyang Ma , Xingming Guo , Yihui Zhang , Jianzhong Zhao

Three-dimensional (3D) architectures in complexly shaped thin-film configurations have arisen increasing attention in flexible electronics, biomedical devices, microrobots and other fields. However, a simple low-cost fabrication method relying on the 2D-to-3D geometric transformation of a patterned thin film remains underexplored. Herein, a thread-pulling-induced assembly strategy is proposed to allow formation of diverse freestanding mesoscale 3D structures, such as closed, multi-layered, and rotational-symmetric architectures. A point-to-point spatial loading path is established, taking advantage of controlled perforation in planar fabrication technology. In this assembly strategy, the final 3D configuration is determined mainly by the structural design of 2D precursors and the thread-pulling-induced loading condition. In particular, two primary deformation modes induced by the thread pulling, including the bending-dominated mode and bending-twisting coupled mode, are exploited to extend the range of accessible 3D configurations. FEA predictions and optical images of various assembled 3D structures illustrate the effectiveness of the strategy. This work could offer new insights into the mechanism of geometric transformation for the construction of complex 3D thin-film structures and devices.

复杂形状薄膜结构的三维结构在柔性电子、生物医学器件、微型机器人等领域受到越来越多的关注。然而，依靠图案薄膜的2d到3d几何变换的简单低成本制造方法仍未得到充分探索。本文提出了一种线拉诱导组装策略，以形成各种独立的中尺度三维结构，如封闭的、多层的和旋转对称的结构。利用平面加工中的可控穿孔技术，建立了点对点的空间加载路径。在该装配策略中，最终的三维构型主要由二维前驱体的结构设计和线拉诱导加载条件决定。特别地，利用螺纹拉扯引起的两种主要变形模式，包括弯曲主导模式和弯曲-扭转耦合模式，扩展了可访问的三维构型范围。各种组合三维结构的有限元预测和光学图像证明了该策略的有效性。这项工作可以为复杂的三维薄膜结构和器件的构造提供几何转换机制的新见解。

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引用次数: 0

Multifunctional 3D-printed corrugated sandwich structure for load-bearing and battery protection 多功能3d打印波纹夹层结构，用于承重和电池保护

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2025-12-22 DOI: 10.1016/j.tws.2025.114439

Yutong Fu , Dan Xia , Pei Huang , Jia Li , Fangliang Guo , Zhen Wang , Yuan-Qing Li , Shao-Yun Fu

Ultra-thin batteries may experience accelerated aging or internal short circuits when subjected to compression, potentially leading to severe safety incidents. Therefore, integrating compressive load-bearing structures with ultra-thin batteries not only provides protection for the batteries but also incorporates them as functional structural components. However, existing research in this area remains limited, and both the load-bearing mechanisms of such structures and their battery protection principles are not yet fully analyzed. This study innovatively proposes a novel beetle's elytra bio-inspired corrugated sandwich structure concept integrating electrochemical energy storage function. By adopting the reasonable printing path planning strategy, sandwich structures of continuous basalt fiber (CBF) reinforced nylon (PA) composites are manufactured by 3D printing and integrated with ultra-thin lithium-ion batteries to achieve structural functional integration. The deformation modes, damage mechanisms, load-bearing characteristics, and battery protection behavior of the structure under compression are analyzed systematically. The influence of critical structural design parameters, such as wall thickness, indentation angle, and split number (SN), on structural performance are extensively discussed. Change in wall thickness does not affect the failure mode, but increasing the inclination angle and split number (SN) can lead to overall collapse failure. This study provides significant technical reference for the design and application of multifunctional bio-inspired sandwich structures integrated with ultra-thin batteries.

超薄电池在受到压缩时可能会加速老化或内部短路，可能导致严重的安全事故。因此，将压缩承重结构与超薄电池相结合，不仅可以为电池提供保护，还可以将其作为功能性结构部件。然而，在这方面的现有研究仍然有限，无论是这种结构的承载机制还是其电池保护原理都没有得到充分的分析。本研究创新性地提出了一种集电化学储能功能于一体的甲虫鞘翅仿生波纹夹层结构概念。采用合理的打印路径规划策略，通过3D打印制造连续玄武岩纤维（CBF）增强尼龙（PA）复合材料的夹层结构，并与超薄锂离子电池集成，实现结构功能一体化。系统分析了该结构在压缩条件下的变形模式、损伤机理、承载特性和电池保护性能。广泛讨论了壁厚、压痕角、劈裂数等关键结构设计参数对结构性能的影响。壁面厚度的变化对破坏模式没有影响，但增加倾斜角和劈裂数（SN）会导致整体坍塌破坏。本研究为集成超薄电池的多功能仿生夹层结构的设计与应用提供了重要的技术参考。

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引用次数: 0

Integrated design of chiral re-entrant honeycombs with multifunctional mechanical properties 具有多功能力学性能的手性可重入式蜂窝的集成设计

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2025-12-22 DOI: 10.1016/j.tws.2025.114440

Hengtai Ni , Jing Liu , Wei Wang , Chiye Yang , Guang Pan

To balance the fundamental contradiction between static and dynamic mechanical properties, a novel multifunctional integrated design of the chiral re-entrant honeycomb (CRH) is proposed by combining chiral support components and re-entrant connection configurations. The static load-bearing and dynamic energy absorption capacities of the proposed honeycomb structures are investigated through in-plane compression simulations. A dispersion dynamics model is established to calculate the band structures and group velocities. The directional vibration transmission responses are compared with the directional band gap characteristics considering modal displacement polarization to verify the effectiveness of the re-entrant connection design in vibration isolation. Furthermore, the effects of the typical geometric parameters and embedded mass blocks on the multifunctional mechanical properties of the CRH are systematically discussed. The results indicate that the static stiffness and ultimate load-bearing capacity of the CRH are enhanced due to the additional reinforcement and alleviated stress concentration driven by the tailored chiral rings. The densification deformation mechanism of the CRH-M under high-velocity compression is disrupted, and thus its energy absorption is dominated by the enhanced inertial effect induced by the embedded mass blocks. The longitudinal waves propagating along the horizontal direction are dissipated by the inclined connection ligaments, generating additional directional band gaps. The dynamic mechanical properties of the CRH can be independently regulated without excessive compromise on its static mechanical properties. Therefore, the excellent load-bearing, energy absorption, and vibration isolation performances of the CRH can be simultaneously achieved. This work provides a feasible solution for the multifunctional integrated design of honeycomb structures.

为了平衡静态力学性能和动态力学性能之间的根本矛盾，提出了一种结合手性支撑部件和可重入连接结构的手性可重入蜂窝（CRH）多功能一体化设计方法。通过面内压缩模拟，研究了蜂窝结构的静承载能力和动态吸能能力。建立了色散动力学模型，计算了带结构和群速度。将定向振动传输响应与考虑模态位移极化的定向带隙特性进行了比较，验证了重入式连接设计在隔振中的有效性。此外，还系统地讨论了典型几何参数和嵌套质量块对CRH多功能力学性能的影响。结果表明，在手性环的驱动下，CRH的额外加固和应力集中得到了缓解，从而提高了CRH的静刚度和极限承载能力。高速压缩下CRH-M的致密变形机制被破坏，其能量吸收主要由嵌套质量块体引起的增强惯性效应主导。沿水平方向传播的纵波被倾斜连接韧带耗散，产生额外的定向带隙。CRH的动态力学性能可以在不影响其静态力学性能的情况下独立调节。因此，可以同时实现CRH优良的承载、吸能和隔振性能。为蜂窝结构的多功能集成设计提供了一种可行的解决方案。

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引用次数: 0

A novel peridynamic cylindrical shell formulation 一种新的周动力圆柱壳公式

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2025-12-22 DOI: 10.1016/j.tws.2025.114430

Zhenghao Yang , Konstantin Naumenko , Selda Oterkus , Erkan Oterkus

Peridynamics (PD) is a new continuum mechanics formulation which has advantages over classical continuum mechanics (CCM) due to its mathematical structure. Peridynamics can provide solutions to the problems including discontinuities such as cracks. In addition, peridynamics has a length scale parameter, named as horizon, which allows peridynamics to represent non-local behaviour that cannot be captured by CCM. As in classical continuum mechanics, PD formulations are also available for simplified structures such as beams, plates, and shells. Solution of PD equations is usually done by using numerical approaches and analytical solution of PD equations is limited in the literature. In this study, details of the derivation of a novel peridynamic cylindrical shell formulation is provided. Several numerical cases are presented to validate the current approach and demonstrate its capabilities including a half cylindrical shell with simply supported boundary conditions and a full cylindrical shell with clamped boundary conditions. Displacement results obtained from PD solution are compared against results obtained from finite element method (FEM) and a very good agreement is obtained between the two solutions. Moreover, natural frequencies obtained from PD analysis are compared with results obtained from CCM solution. It is shown that PD results converge to CCM solution results as the horizon size decreases and diverge as the horizon size increases. This shows that peridynamics can be a suitable technique for problems having non-classical non-local behaviour.

周期动力学（PD）是一种新的连续介质力学公式，其数学结构优于经典连续介质力学。周动力学可以为裂缝等不连续性问题提供解决方案。此外，周期动力学有一个长度尺度参数，称为地平线，它允许周期动力学表示CCM无法捕获的非局部行为。与经典连续介质力学一样，PD公式也可用于简化结构，如梁、板和壳。PD方程的解通常采用数值方法，文献中PD方程的解析解是有限的。在这项研究中，详细推导了一种新的周动力圆柱壳公式。给出了几个数值算例来验证当前方法，并展示了其能力，包括具有简支边界条件的半圆柱壳和具有夹紧边界条件的全圆柱壳。将PD解得到的位移结果与有限元法得到的位移结果进行了比较，得到了很好的一致性。此外，还将PD分析得到的固有频率与CCM溶液得到的固有频率进行了比较。结果表明，随着水平尺寸的减小，PD结果收敛于CCM解的结果，随着水平尺寸的增大，PD结果发散。这表明，对于具有非经典非局部行为的问题，周动力学可以是一种合适的技术。

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引用次数: 0

Dynamic structural response and damage efficiency of thin metal targets subjected to synergistic mechanical-thermal-chemical loading from reactive material projectiles 反应材料弹丸在机械-热-化学协同载荷作用下薄金属靶的动态结构响应和损伤效率

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2025-12-21 DOI: 10.1016/j.tws.2025.114436

Bo Sun, Weidong Chen, Shengzhuo Lu

Metal-Encased Reactive Material Projectiles (MERMPs) induce strongly nonlinear structural responses in thin-walled targets via coupled mechanical–thermal–chemical loads. To quantify the synergistic energy conversion process and its influence on damage efficiency, a quantitative ignition criterion (

ψ_{i g n}

) is proposed, unifying mechanical fracture, particle-scale fragmentation, and thermal–chemical activation into a unified predictive model. Ballistic and energy-release experiments were conducted to characterize the transition from kinetic-dominated penetration to coupled mechanical–thermal–chemical damage. The results demonstrate a distinct threshold velocity (∼860 m/s) beyond which synergistic coupling significantly amplifies structural failure and deformation. Corresponding SPH–FEM simulations reproduce the time-sequenced evolution of stress, temperature, and reaction degree, confirming that synchronized rupture and ignition enhance the chemical-to-mechanical energy transfer. Quantitative analysis indicates that under optimal coupling, chemical energy contributes 45–55 % of the total input, increasing the damage efficiency by over 60 %. Furthermore, a response-surface parametric analysis identifies the configuration yielding maximal energy synchronization and deformation efficiency. The optimal condition (v₀=1050 m/s, L_sh=1.5 mm) achieves near-synchronous peak stress and reaction timing, producing the highest structural damage and energy conversion efficiency. This research provides a physics-informed and quantitatively validated framework for understanding multi-field energy coupling and guiding optimization of thin-walled structures under complex reactive impact loading.

金属包覆反应材料弹丸（MERMPs）通过机械-热-化学耦合载荷在薄壁靶中引起强烈的非线性结构响应。为了量化协同能量转换过程及其对损伤效率的影响，提出了一种定量点火判据，将力学断裂、颗粒尺度破碎和热化学活化统一为一个统一的预测模型。通过弹道和能量释放实验，表征了从动能为主的侵彻到机械-热-化学耦合损伤的转变。结果表明，有一个明显的阈值速度（~ 860 m/s），超过该阈值，协同耦合会显著加剧结构破坏和变形。相应的SPH-FEM模拟再现了应力、温度和反应程度的时间顺序演变，证实了同步破裂和点火增强了化学能到机械能的传递。定量分析表明，在最优耦合下，化学能占总投入的45% ~ 55%，损伤效率提高60%以上。此外，响应面参数分析确定了产生最大能量同步和变形效率的构型。最优条件（v 0 =1050 m/s, Lsh=1.5 mm）实现了近乎同步的峰值应力和反应时间，产生了最高的结构损伤和能量转换效率。该研究为理解多场能量耦合和指导复杂反应冲击载荷下薄壁结构的优化提供了一个物理信息和定量验证的框架。

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引用次数: 0

Axial compressive testing and resistance prediction of fold-fastened multi-cellular steel walls 叠扣多孔钢墙体轴压试验及阻力预测

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2025-12-21 DOI: 10.1016/j.tws.2025.114438

Cheng-Da Yu , Sheng-Jie Duan , Hang Chen , Jing-Zhong Tong

As a novel type of cold-formed steel (CFS) structure, fold-fastened multi-cellular steel walls (FMSWs) distinguish themselves from conventional CFS composite components primarily through their mechanically interlocking assembly approach. Such structures are commonly used in scenarios like wall panels or elevator shafts in modular buildings. Static axial compression tests were conducted on ten specimens to investigate the axial compression behavior of FMSWs. The experimental results demonstrated that all specimens failed through local buckling instability characterized by partial plate folding, while the indented regions effectively restrained plate separation in fold-fastened regions. The ultimate loads of the ten specimens ranged between 142.4 kN and 372.2 kN. Comparative analysis revealed that increasing the number, width, and thickness of individual cells, as well as reducing cell length while maintaining the overall specimen width, significantly enhanced the local buckling capacity. The incorporation of a U-shaped channel as a non-load-bearing auxiliary component had a negligible effect on the buckling resistance. Conversely, the presence of indented regions reduced the local buckling capacity. Finite element analyses validated through experimental data confirmed the effectiveness and accuracy of the numerical model. Parametric studies further demonstrated that the arrangement pattern and length of indented regions exhibited negligible influence on local buckling capacity, whereas the increased width of indented regions progressively diminished the structural resistance to local buckling. Finally, based on the effective width method, a calculation formula for the axial compressive capacity of FMSWs was derived, and the computed results were compared with experimental results for validation.

作为一种新型的冷弯型钢（CFS）结构，折叠固定多孔钢壁（FMSWs）与传统的冷弯型钢复合材料部件的区别主要在于其机械联锁的装配方式。这种结构通常用于模块化建筑的墙板或电梯井等场景。对10个试件进行了静轴压试验，研究了fmsw的轴压特性。实验结果表明，所有试件均通过局部屈曲失稳破坏，其特征为板块部分折叠，而褶皱固定区的缩进区有效地抑制了板块分离。10个试件的极限荷载范围在142.4 ~ 372.2 kN之间。对比分析表明，增加单个细胞的数量、宽度和厚度，以及在保持整体试样宽度的同时减小细胞长度，可以显著增强局部屈曲能力。加入u形通道作为非承重辅助构件对屈曲抗力的影响可以忽略不计。相反，缩进区域的存在降低了局部屈曲能力。通过实验数据验证了有限元分析的有效性和准确性。参数化研究进一步表明，缩进区域的排列方式和长度对局部屈曲能力的影响可以忽略不计，而缩进区域宽度的增加逐渐降低了结构的局部屈曲抗力。最后，基于有效宽度法推导了fmsw轴压承载力的计算公式，并将计算结果与试验结果进行了对比验证。

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引用次数: 0

Shear behavior of demountable H-section connectors in composite beams with steel girder and precast concrete slab 钢梁-混凝土预制板组合梁可拆卸h型连接件的抗剪性能

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2025-12-21 DOI: 10.1016/j.tws.2025.114437

Zhangdi Ren, Junfeng Jia, Xiuli Du, Yulei Bai

As the service life of bridges increased, concrete bridge decks experienced erosion-induced deterioration, fatigue cracking, and delamination, seriously affecting the normal operation of bridge structures. To achieve the quick disassembly and reassembly of concrete bridge decks, innovative demountable H-section steel shear connectors (DHSSCs) have been developed. Static push-out tests were conducted to analyze the effects of important parameters on shear performance. The test results indicated that increasing the bolt diameter could significantly enhance the shear stiffness. When the length of shear connectors was increased from 100 mm to 125 mm and 150 mm, the shear capacity improved by 12.22% and 23.09%, but the increase in shear stiffness was not significant. When C45 concrete was replaced with UHPC, the shear capacity and shear stiffness increased by 17.93% and 2.89%. However, a dramatic decrease of 69.55% was observed in the characteristic slip capacity. While maintaining an equivalent web shear area, changing the dimension of DHSSCs had negligible influence on both shear capacity and stiffness. Finally, the calculation method for shear capacity was established by considering shear connector yielding and bolt shearing. The proposed calculation theory achieved a prediction accuracy of 99.7%, accurately quantifying the shear resistance of DHSSCs.

随着桥梁使用寿命的延长，混凝土桥面出现侵蚀变质、疲劳开裂、脱层等现象，严重影响桥梁结构的正常使用。为实现混凝土桥面的快速拆装，研制了新型可拆卸h型钢剪力连接件（DHSSCs）。通过静力推拔试验，分析了重要参数对抗剪性能的影响。试验结果表明，增大锚杆直径可显著提高锚杆抗剪刚度。当剪连接件长度从100 mm增加到125 mm和150 mm时，抗剪能力分别提高12.22%和23.09%，但抗剪刚度增加不显著。用UHPC替代C45混凝土，抗剪承载力和抗剪刚度分别提高17.93%和2.89%。而特征滑移能力则急剧下降了69.55%。在保持等效腹板剪切面积的情况下，改变dhssc的尺寸对其抗剪能力和刚度的影响可以忽略不计。最后，建立了考虑抗剪接头屈服和锚杆剪切的抗剪承载力计算方法。所提出的计算理论预测精度达到99.7%，准确量化了dhssc的抗剪性能。

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引用次数: 0

Synchronous piezoelectric-electromagnetic energy harvesting of a bi-directional functionally graded pipe conveying fluid 双向功能梯度管道输送流体的压电-电磁同步能量采集

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2025-12-21 DOI: 10.1016/j.tws.2025.114433

Yuan-Yuan Jin , Xiao-Tian Guo , Yao Chen , Feng Liang

In this study, a coupled electro-magneto-mechanical composite pipe model is developed to simultaneously collect vibration energy via piezoelectric and electromagnetic mechanisms. The material properties of the rectangular pipe are continuously distributed along both the width and height directions, forming a bi-directional functionally graded (2D FG) structure. An internal fluid flows with a constant velocity. The bimorph pipe is arranged together with a pair of permanent magnets and multi-turn coils at the free end, and both the piezoelectric and electromagnetic components are connected to resistance circuits to achieve synchronous energy harvesting. The system dynamics are formulated based on the coupled electro-magneto-mechanical Lagrangian equations, and the harmonic balance method (HBM) is employed to measure the steady-state vibration and electrical responses. Results demonstrate that compared to a single piezoelectric or electromagnetic harvester, the proposed hybrid structure achieves enhanced voltage and power generation, and enables dual-source energy output. The 2D FG properties majorly affect higher-order electricity characteristics. Additionally, it is found that fluid-structure interaction (FSI) effects degrade the energy harvesting performance, while the impacts of load resistance on the output voltage, current and power remain nonuniform, highlighting the need for careful parameter optimization in practical designs.

在本研究中，建立了一种电-磁-力耦合复合管道模型，通过压电和电磁机构同时收集振动能量。矩形管的材料性能沿宽度和高度方向连续分布，形成双向功能梯度（2D FG）结构。内部流体以恒定速度流动。双晶圆管自由端设置一对永磁体和多匝线圈，压电元件和电磁元件均连接电阻电路，实现同步能量收集。基于电磁-机械耦合拉格朗日方程建立了系统动力学模型，采用谐波平衡法（HBM）测量了系统的稳态振动和电响应。结果表明，与单一压电或电磁采集器相比，所提出的混合结构实现了更高的电压和发电能力，并实现了双源能量输出。二维FG特性主要影响高阶电特性。此外，发现流固耦合（FSI）效应降低了能量收集性能，而负载电阻对输出电压、电流和功率的影响仍然不均匀，突出了在实际设计中需要仔细优化参数。

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引用次数: 0

Predicting bird impact response and damage behavior of three-dimensional woven composites using a localized subcell model 基于局部亚单元模型的三维编织复合材料鸟类撞击响应和损伤行为预测

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2025-12-20 DOI: 10.1016/j.tws.2025.114427

Yejie Qiao , Xiaopeng Chen , Yang Bai , Chunlin Du , Zhenqiang Zhao , Chao Zhang

It is important to study the impact response and damage behavior of composites due to the growing number of aircraft accidents caused by bird strikes. This study examines the response of three-dimensional woven composite (3DWC) plates to impacts by birds, in which quasi-static and impact tests were conducted. An efficient local homogenization modeling approach that avoids manual division was developed. The proposed model employs a specified subdomain to loop the unit cell for the automatic generation of yarn subcells and matrix subcells. The subcell model of the unit cell is then assembled into a large-size macrostructure for bird impact simulations, and the simulations were found to provide good predictions of impact response, yarn damage, and matrix damage. The impact tests and simulation results were used to analyze the deformation and damage behavior of the 3DWC plate in detail. The results show that matrix cracks and matrix spalling are the dominant damage modes and slight fiber breakage only occurs for impacts with high energy. Matrix damage primarily occurs near the rear surface of the composite plates due to tensile stress. It is also found that composite plates impacted by small birds exhibit a higher energy absorption ratio than plates struck by large birds for impacts with comparable impact energy. The findings of this study are expected to provide guidance on the anti-bird strike design of woven composites.

由于鸟类撞击引起的飞机事故越来越多，研究复合材料的冲击响应和损伤行为变得越来越重要。本文研究了三维编织复合材料（3DWC）板对鸟类撞击的响应，进行了准静态和冲击试验。提出了一种有效的局部均质建模方法，避免了人工分割。该模型采用指定的子域对单元胞进行循环，实现纱线子胞和矩阵子胞的自动生成。然后将单元胞的亚胞模型组装成一个大尺寸的宏观结构，用于鸟类撞击模拟，模拟结果表明，该模拟可以很好地预测撞击响应、纱线损伤和基质损伤。采用冲击试验和模拟结果对3DWC板的变形和损伤行为进行了详细分析。结果表明：基体裂纹和基体剥落是主要的损伤形式，只有在高能撞击时才会发生轻微的纤维断裂；由于拉伸应力，基体损伤主要发生在复合材料后表面附近。在相同的冲击能量下，受小鸟撞击的复合材料板比受大鸟撞击的复合材料板具有更高的能量吸收比。研究结果有望为机织复合材料的抗鸟击设计提供指导。

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引用次数: 0