Thin-Walled Structures最新文献_第5页

Analytical treatment and experimental investigation of forced displacement responses of cracked fluid-filled thin cylindrical shells 裂隙充液薄圆柱壳强迫位移响应的解析处理与实验研究

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-29 DOI: 10.1016/j.tws.2026.114592

Tong Wang , Lin Li , Ying Zhang , Jichao Li , Qingjiang Wan , Dapeng Tan

This study investigates the dispersion characteristics and forced vibration responses of cracked fluid-filled thin cylindrical shells (FTCS) through an integrated analytical and experimental approach. First, a fluid-structure interaction dynamic model is established by combining Flügge shell theory with the Helmholtz equation. The vibration generation and propagation mechanisms are then systematically analyzed via wave propagation theory, leading to the derivation of analytical solutions for forced vibration displacements through Fourier transforms and the residue theorem. Subsequently, for cracked regions, local flexibility matrices and interface continuity conditions are formulated using fracture mechanics and the Linear Spring Model (LSM). This framework enables the derivation of nonlinear displacement responses under various excitations through the wave superposition principle, revealing the influence of crack morphology on vibration evolution. Finally, the analytical method is validated using a multi-module LMS vibration testing platform, with theoretical and experimental results showing <6% discrepancy. The results demonstrate that the fluid medium significantly amplifies specific attenuating standing waves beyond vacuum conditions and shifts propagation wave cutoffs to higher frequencies. Under harmonic point excitation, FTCS with different crack morphologies exhibit displacement responses that remain harmonic and in-phase with the excitation, differing only in amplitude.

采用分析与实验相结合的方法，研究了裂纹充液薄圆柱壳（FTCS）的频散特性和强迫振动响应。首先，将fl gge壳理论与亥姆霍兹方程相结合，建立了流固耦合动力学模型。然后，通过波传播理论系统地分析了振动的产生和传播机制，并通过傅里叶变换和剩余定理推导了强迫振动位移的解析解。随后，利用断裂力学和线性弹簧模型（LSM）建立了裂纹区域的局部柔度矩阵和界面连续性条件。该框架可以通过波动叠加原理推导各种激励下的非线性位移响应，揭示裂纹形貌对振动演化的影响。最后，在多模块LMS振动测试平台上对分析方法进行了验证，理论与实验结果相差6%。结果表明，在真空条件下，流体介质显著放大了特定衰减驻波，并将传播波截止点移至更高的频率。在谐波点激励下，不同裂纹形态的FTCS位移响应与激励保持谐波同相，仅振幅不同。

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引用次数: 0

An analytical modeling-based investigation of the effects of material plasticity on periodic cellular structures 基于分析模型的材料塑性对周期性细胞结构影响的研究

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-29 DOI: 10.1016/j.tws.2026.114594

Naresh Koju, Li Yang

Plastic behaviors are significant in the performance of lightweight cellular structures (with both thin walls and thin struts). There exists an abundance of observations and investigations with the plastic behaviors of cellular structures, mostly via experimentation or finite element analysis. In this work, an analytical modeling-based investigation of the effects of material plasticity on multiple cellular structures was carried out, in the attempt to obtain more quantitative insights into the deformation and failure mechanisms of cellular structures with plasticity, as well as elucidating relevant parametric design knowledge. A full-scale modeling of finite-size cellular patterns including boundary constraints was employed to adequately account for local stress/strain heterogeneity, which is particularly important for realistic cellular structure designs utilizing methods such as additive manufacturing. Material plasticity was incorporated as joint-focused plasticity (plastic hinge), and the compound effect of cellular topology-plasticity-structural property relationships were investigated. The results were compared with the perfectly-elastic materials utilizing the same modeling approach. Further, the limitations of the plasticity treatment in the current model with stretching-dominated cellular designs were also discussed.

塑性行为在轻型蜂窝结构（薄壁和薄杆）的性能中具有重要意义。对胞状结构的塑性行为进行了大量的观察和研究，主要是通过实验或有限元分析。在这项工作中，基于分析模型的研究材料塑性对多个胞状结构的影响，试图获得更多的定量见解，以塑性胞状结构的变形和破坏机制，并阐明相关的参数化设计知识。采用包含边界约束的有限尺寸细胞模式的全尺寸建模来充分考虑局部应力/应变非均质性，这对于利用增材制造等方法进行现实细胞结构设计尤为重要。将材料塑性纳入节理塑性（塑性铰），研究细胞拓扑-塑性-结构性能关系的复合效应。结果与采用相同建模方法的完全弹性材料进行了比较。此外，还讨论了当前以拉伸为主的细胞设计模型中塑性处理的局限性。

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引用次数: 0

Enhancing the thermal distribution homogenization and interfacial adhesion at induction welded composite interface by SCF reinforced thermoplastic layer SCF增强热塑性层增强感应焊复合材料界面的热分布均匀性和界面附着力

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-29 DOI: 10.1016/j.tws.2026.114593

Xueyan Zhang , Ziwei Feng , Jianhui Su , Xiaohui Han , Guolong Ma , Fuyun Liu , Bo Chen , Xiaoguo Song , Caiwang Tan

Induction welding of carbon fiber reinforced thermoplastic (CFRTP) often faces edge effect issue, which negatively affects the joint quality. This study explored the induction welding of carbon fiber reinforced polyamide 66 (CF/PA66) using a composite PA66 film reinforced with short carbon fiber (SCF) at interface to reduce edge effect and improve joint strength. Results indicated that the incorporation of SCF increased the number of polar functional groups on the resin film and increased surface roughness, promoting adhesion force between heating element (HE) and matrix. Additionally, the randomly dispersed SCFs formed interconnected heat-conduction pathways within the PA66 matrix, which enhanced the thermal conductivity of the interface by providing additional heat transfer routes alongside the HE. Finite element analysis (FEA) confirmed that the improved heat transfer capability at interface contributed to a more uniform temperature distribution. Furthermore, the PA66 films prepared with SCF exhibited a lower thermal expansion coefficient, which enhanced thermal shrinkage resistance and minimized stress concentration. Finally, the integration of SCF markedly enhanced lap shear strength (LSS) of joints, achieving an increase of 1.37 times compared to the strength of joints without SCF under optimal heat input conditions. This improvement presented a novel strategy for attaining high-quality induction-welded joints.

碳纤维增强热塑性塑料（CFRTP）的感应焊接常面临边缘效应问题，对接头质量产生不利影响。本研究探讨了在界面处使用短碳纤维增强PA66复合膜（SCF）进行碳纤维增强聚酰胺66 （CF/PA66）的感应焊接，以减小边缘效应，提高接头强度。结果表明，SCF的加入增加了树脂膜上极性官能团的数量，提高了表面粗糙度，增强了加热元件与基体之间的附着力。此外，随机分散的scf在PA66基质内形成了相互连接的导热路径，通过在HE旁边提供额外的传热路径，增强了界面的导热性。有限元分析证实，界面传热能力的提高使得温度分布更加均匀。此外，SCF制备的PA66薄膜具有较低的热膨胀系数，增强了热收缩性能，减小了应力集中。最后，在最优热输入条件下，SCF的集成显著提高了节点的搭接抗剪强度（LSS），与不含SCF的节点相比，LSS的强度提高了1.37倍。这种改进为获得高质量的感应焊接接头提供了一种新的策略。

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引用次数: 0

Multi-objective optimization of FG-TPMS plates based on isogeometric analysis 基于等几何分析的FG-TPMS板的多目标优化

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-28 DOI: 10.1016/j.tws.2026.114591

Chenxu Chu , Chao Wang , Yun Chong , Xiaolu Wang

This paper proposes a novel methodology for the optimizing the material distribution of functionally graded triply periodic minimal surface (FG-TPMS) plates. The approach integrates isogeometric analysis (IGA) with simple first-order shear deformation theory (S-FSDT) to accurately capture the mechanical behavior of FG-TPMS plates. A recently proposed adaptive multi-objective chaotic particle swarm optimization (MOACPSO) algorithm is employed to solve minimization problems with mixed constraints. This algorithm effectively enhances the balance between the local and global search abilities, consequently improving the accuracy and convergence speed of the solution. The material distribution is parametrically defined utilizing B-spline basis functions, with thickness direction control points serving as the design variables. The optimization objectives are established as maximizing the first natural frequency and the minimizing structural weight. Numerical examples of square, circle, quarter of a circular and snowflake plates illustrate the optimized material distributions of representative elite solutions and corresponding first form modes. These results collectively validate the feasibility of the proposed method for optimizing the material distribution of FG-TPMS plates.

本文提出了一种优化功能梯度三周期最小表面（FG-TPMS）板材料分布的新方法。该方法将等几何分析（IGA）与简单一阶剪切变形理论（S-FSDT）相结合，可以准确捕捉FG-TPMS板的力学行为。采用自适应多目标混沌粒子群算法（MOACPSO）求解混合约束下的最小化问题。该算法有效地增强了局部和全局搜索能力的平衡，从而提高了解的精度和收敛速度。材料分布采用b样条基函数进行参数化定义，厚度方向控制点作为设计变量。将优化目标确定为第一固有频率最大化和结构重量最小化。方形板、圆形板、四分之一圆板和雪花板的数值算例说明了具有代表性的精英解和相应的一阶模态的优化材料分布。这些结果共同验证了该方法优化FG-TPMS板材料分布的可行性。

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引用次数: 0

Bionic design and stability analysis of double-sided different curvature corrugated shells 双面不同曲率波纹壳的仿生设计及稳定性分析

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-27 DOI: 10.1016/j.tws.2026.114586

Cunyao Shan , Jianliang Sun

This study introduces a double-sided different curvature (DSDC) corrugated shell inspired by the turritella bacillum shell, characterized by the dual effect of local thickness and local curvature on the cylindrical shell. Furthermore, the initial topological optimization operation confirmed the rationality of this design. Corrugated shells can be used for pressure structures of important equipment such as nuclear submarines and Deep-sea space station. This paper establishes a constitutive model for the corrugated shell element, provides three specific examples, and calculates each stiffness term using theoretical methods. The equivalent stiffness was calculated and compared with the finite element analysis (FEA) results. A series of corrugated shells with the same volume and weight were constructed. By combining stability theory, FEA and hydrostatic pressure test, the mechanical behavior of the DSDC corrugated shells was revealed. The results show that the design of the DSDC corrugated shell is correct. The corrugation peaks provide overall support, and the large deformation of the corrugation troughs helps to improve the buckling load. Therefore, DSDC can effectively overcome the cracking of corrugated shells during the post-buckling process, as can be proven by comparison with existing experimental studies. This research improves the stability of corrugated shells and optimizes their failure modes, providing a new approach for innovative design of corrugated shells.

本研究引入了一种受turritella bacillus壳体启发的双面不同曲率（DSDC）波纹壳，其特征是局部厚度和局部曲率对圆柱壳的双重影响。初步的拓扑优化运行验证了该设计的合理性。波纹壳可用于核潜艇、深海空间站等重要设备的承压结构。本文建立了波纹壳单元的本构模型，给出了三个具体算例，并用理论方法计算了各刚度项。计算了等效刚度，并与有限元分析结果进行了比较。构造了一系列具有相同体积和重量的波纹壳。通过稳定性理论、有限元分析和静水压力试验相结合，揭示了DSDC波纹壳的力学性能。结果表明，DSDC波纹壳的设计是正确的。波纹峰提供整体支撑，波纹槽的大变形有助于提高屈曲载荷。因此，DSDC可以有效地克服波纹壳后屈曲过程中的开裂，与已有实验研究的对比可以证明这一点。该研究提高了波纹壳的稳定性，优化了波纹壳的破坏模式，为波纹壳的创新设计提供了新的途径。

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引用次数: 0

Optimized vibration and acoustic control of FGM hull-CS raft system integrating modified variational method and differential evolution algorithm 结合改进变分法和微分进化算法的FGM船体- cs筏系统振动与声学优化控制

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-27 DOI: 10.1016/j.tws.2026.114589

Jinpeng Su , Shanlu Lv , Run Tao , Zhichao Lv , Zhiyang Lei

This paper presents a vibro-acoustic analysis and parameter optimization method for a submerged Functionally Graded Material (FGM) shell with floating raft isolation system. The Corrugated Sandwich (CS) structure is employed for the raft to make full use of its light weight and high stiffness. A semi-analytical method of high accuracy and efficiency is developed for the vibro-acoustic analysis. In the proposed method, deformations of the FGM hull are characterized via the first-order shear deformation theory (FSDT), acoustic pressure in the fluid field is formulated using Helmholtz equations, and bidirectional fluid-structure coupling is realized through interface displacement continuity conditions and work terms from acoustic pressure. The 3D coupling problem is analytically reduced to 2D problem by Fourier series expansion of displacement and pressure components, while the proposed modified variational principles allows flexible basis functions to achieve accurate numerical solutions. The semi-analytical method is then integrated with a genetic evolutionary algorithm for multi-objective optimization of the key material parameters of the coupled system. This algorithm exhibits fast convergence speed (basically converging after 20 iterations) and the capability of achieving both global and local optimization, thus overcoming the local optimum limitation of traditional gradient-based methods. The influences of the composite materials on vibro-acoustic control using floating raft system are examined. Optimal structural parameters of the CS raft are then determined, providing theoretical support and optimization method for the design of low-vibration and quiet coupled composite shells.

提出了一种具有浮筏隔振系统的功能梯度材料（FGM）水下壳体的振动声分析和参数优化方法。筏体采用波纹夹层结构，充分利用其重量轻、刚度高的特点。提出了一种高精度、高效率的振动声分析半解析方法。该方法利用一阶剪切变形理论（FSDT）对FGM船体的变形进行表征，利用亥姆霍兹方程表示流场中的声压，通过界面位移连续性条件和声压功项实现双向流固耦合。通过位移分量和压力分量的傅里叶级数展开，将三维耦合问题解析化为二维问题，提出的改进变分原理允许灵活的基函数实现精确的数值解。然后将半解析方法与遗传进化算法相结合，对耦合系统的关键材料参数进行多目标优化。该算法具有较快的收敛速度（20次迭代基本收敛），能够同时实现全局和局部优化，克服了传统基于梯度的方法局部最优的局限性。研究了复合材料对浮筏系统声振控制的影响。确定了CS筏的最优结构参数，为低振动静音耦合复合壳的设计提供了理论支持和优化方法。

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引用次数: 0

Scaling laws for thin-walled cylindrical shells under uniform lateral free-drop low-velocity impact loading with elastic effects 具有弹性效应的薄壁圆柱壳在横向自由落体低速冲击载荷下的标度规律

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-27 DOI: 10.1016/j.tws.2026.114590

Xinzhe Chang , Fei Xu , Wesley J. Cantwell , Wei Feng

Scaling laws serve as an important link in relevant physical quantities between scaled models and full-size prototypes, enabling accurate prediction of structural impact behavior. However, conventional scaling methods often fail to accurately predict the impact response of thin-walled cylindrical shells when elastic effects are non-negligible. To address this issue, a refined set of impact scaling laws for thin-walled cylindrical shells is proposed in this study, explicitly accounting for elastic effects that are often neglected in conventional scaling methods. The proposed scaling laws are developed by combining displacement fields, strain-displacement relations, elastic-plastic constitutive equations, and the energy conservation principle through equation and dimensional analysis. Within this scaling framework, geometric distortion is addressed by correcting the mid-surface radius and material distortion is accounted for by correcting the initial impact velocity. Data from a series of impacted thin-walled cylindrical shells, with varying degrees of geometric distortion and materials, are verified numerically and discussed in detail. Numerical results based on temporal evolution and spatial distribution indicate that the proposed impact scaling laws predict the displacement, velocity, energy and stress dynamic responses of the full-size prototype with only a small error. Furthermore, the influence of a dimensionless impact elastic-plastic number on prediction errors is identified. The effectiveness of the scaling framework is further validated across a wide range of elastic deformation proportions, offering a reliable theoretical foundation for the design and implementation of scaled impact experiments involving thin-walled cylindrical shells.

缩尺定律是缩尺模型与全尺寸原型之间相关物理量的重要联系，可以准确预测结构的冲击行为。然而，当弹性效应不可忽略时，传统的标度方法往往不能准确地预测薄壁圆柱壳的冲击响应。为了解决这一问题，本研究提出了一套完善的薄壁圆柱壳冲击标度定律，明确地考虑了传统标度方法中经常被忽略的弹性效应。通过方程和量纲分析，结合位移场、应变-位移关系、弹塑性本构方程和能量守恒原理，建立了相应的标度规律。在这个缩放框架中，几何畸变通过修正中表面半径来解决，材料畸变通过修正初始冲击速度来解决。对一系列具有不同几何变形程度和不同材料的冲击薄壁圆柱壳的数据进行了数值验证和详细讨论。基于时间演化和空间分布的数值结果表明，所提出的冲击标度律能较好地预测原尺寸原型的位移、速度、能量和应力动态响应，误差较小。进一步分析了无量纲冲击弹塑性数对预测误差的影响。进一步验证了该标度框架在大范围弹性变形比例下的有效性，为薄壁圆柱壳标度冲击实验的设计与实现提供了可靠的理论基础。

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引用次数: 0

Experimental and numerical investigation on seismic performance enhancement of free-spanning submarine pipelines equipped with casing-pipe type TMD 套管式TMD增强海底自由跨管道抗震性能的试验与数值研究

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-27 DOI: 10.1016/j.tws.2026.114588

Haiyang Pan , Chao Li , Jiahui Hu , Hong-Nan Li , Guoan Wang

Although the seismic design of free-spanning submarine pipelines (FSSPs) can enable structures to remain life safety during severe offshore earthquakes by permitting non-failure inelastic deformation, the resulting structural damage typically entails prohibitively high repair costs. With this background, a novel casing-pipe type TMD (CP-TMD) consisting of a uniformly mass-distributed casing-pipe and multiple spring-dashpot elements is implemented to enhance the seismic performance of FSSPs, thereby ensuring structural safety. Firstly, multiple underwater shaking table tests were carried out on a scale FSSP model, deploying the CP-TMD under examination. Test results highlighted the excellent energy dissipation performance of the vibration control device during the vibration process of the FSSP. Secondly, numerical simulations incorporating the added hydrodynamic mass method are carried out to explore the influence of the design parameters (casing-pipe length and installation scenario) of CP-TMD on the control effect for stochastic seismic responses of the FSSP. Finally, seismic fragility curves of the FSSP equipped with CP-TMD featuring optimal design parameters are developed. Moreover, the effectiveness of CP-TMD for improving the seismic performance of the FSSP is further estimated by comparing seismic fragilities with and without the vibration control device. The analysis results indicate the proposed CP-TMD can significantly mitigate the seismic responses of the FSSP, and the FSSP equipped with CP-TMD exhibit much lower damage probability under same seismic intensities. This investigation could provide meaningful references for the development of vibration control strategies for enhancing seismic resilience of FSSPs.

尽管自由跨越海底管道（fssp）的抗震设计可以通过允许非弹性变形而使结构在严重的海上地震中保持生命安全，但由此导致的结构损坏通常需要高昂的修复成本。在此背景下，提出了一种由均匀质量分布的套管和多个弹簧减震器单元组成的新型套管型TMD (CP-TMD)，以提高fssp的抗震性能，从而确保结构安全。首先，在一个比例FSSP模型上进行了多次水下振动台试验，部署了CP-TMD。试验结果表明，该振动控制装置在FSSP振动过程中具有良好的消能性能。其次，采用附加水动力质量法进行数值模拟，探讨了CP-TMD的设计参数（套管长度和安装场景）对FSSP随机地震响应控制效果的影响。最后，建立了具有最优设计参数的CP-TMD框架结构的地震易损性曲线。此外，通过比较有无振动控制装置的地震易损性，进一步估计了CP-TMD对提高FSSP抗震性能的有效性。分析结果表明，CP-TMD能显著减轻FSSP的地震反应，在相同烈度下，安装CP-TMD的FSSP的损伤概率明显降低。研究结果可为提高结构抗震能力的振动控制策略的制定提供有意义的参考。

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引用次数: 0

Cascading deep neural networks for inverse design of acoustic-mechanical multifunctional metastructures 基于级联深度神经网络的声-力多功能元结构反设计

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-27 DOI: 10.1016/j.tws.2026.114587

Penghui Zhu , Chen Du , Jiajun Chen , He Liao , Xiaosu Yi , Wenming Zhao , Xiongqi Peng

Multifunctional, lightweight, and compact structures have become increasingly essential in modern applications, as exemplified by airplanes. This paper presents a methodology for the concurrent inverse design of acoustic-mechanical properties in curved-crease origami foldcore sandwich structures, utilizing deep neural networks. Initially, a forward neural network was developed to predict sound absorption coefficients, buckling strength, and failure strength based on geometric parameters. Subsequently, an inverse neural network was constructed and cascaded with the pretrained forward neural network to achieve inverse design, mapping functional requirements to geometric characteristics. Through two practical engineering cases and experimental validations, one of the inverse-designed structures with a thickness of 21.4 mm exhibits excellent sound absorption (α > 0.85) at the target frequencies of 720 Hz and 900 Hz. Another inverse-designed structure, with a thickness of 22.4 mm, achieves 75% sound absorption within the target frequency band (600–1000 Hz). Furthermore, the inverse-designed structures exhibit exceptional mechanical performance, with failure strength exceeding 60 MPa and specific strength reaching up to 32.3 MPa/g. This work accomplishes the inverse design of a metastructure characterized by lightweight, ultra-thin, and functionality-customizable attributes, highlighting its potential applications in aerospace, transportation, and architectural acoustics engineering.

多功能、轻量化和紧凑的结构在现代应用中变得越来越重要，飞机就是一个例子。提出了一种基于深度神经网络的弯曲折纸芯夹层结构声力学性能并行反设计方法。首先，开发了一种基于几何参数的前向神经网络来预测吸声系数、屈曲强度和破坏强度。随后，构建逆神经网络，并与预训练的正向神经网络级联，实现逆设计，将功能需求映射到几何特征。通过两个工程实例和实验验证，其中厚度为21.4 mm的反设计结构在720 Hz和900 Hz目标频率下具有良好的吸声性能（α > 0.85）。另一种反设计结构，厚度为22.4 mm，在目标频带（600-1000 Hz）内实现75%的吸声。反设计结构的破坏强度超过60 MPa，比强度达到32.3 MPa/g，力学性能优异。这项工作完成了一种以轻量化、超薄和功能可定制属性为特征的元结构的逆设计，突出了其在航空航天、交通运输和建筑声学工程中的潜在应用。

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引用次数: 0

Enhancing impact resistance by customizable hybrid lattice structures with anisotropy 通过具有各向异性的可定制混合晶格结构增强抗冲击性

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-27 DOI: 10.1016/j.tws.2026.114585

Jing Wei , Zhiqiang Liu , Yuxing Zhou , Qinqin Wei , Shengchao Chen , Guoqiang Luo , Qiang Shen

Lattice structures with excellent mechanical properties have attracted considerable attention for use in various applications, especially for energy absorption. However, their application is limited by their brittle fracture due to stress concentration and poor impact resistance. In this paper, we propose a novel hybrid lattice structure for exceptional impact resistance derived from the framework of pixelated body-centered-cubic (BCC) structure. The multi-cell hybrid lattice structure alleviates stress concentration, and suppresses shear band formation by customizing stress transfer path, thereby impeding crack propagation. Applying this structure, we develop the multi-cell hybrid lattice structure that achieves superior impact resistance of the conventional structures. Quasi-static compression and the Split Pressure Hopkinson Bar (SHPB) testing were conducted. Finite element analysis (FEA) was employed to investigate the anisotropy of lattice structures under uniaxial compression, shear, and hydrostatic loading, providing further insight into the mechanisms behind the performance improvements of the hybrid lattice structure. By leveraging hybrid lattice structure to coordinate dynamic deformation, this work establishes a generalizable framework for designing high-performance, impact resistant materials for aerospace engineering, automobile design, and packaging.

晶格结构具有优异的力学性能，在各种应用中，特别是在能量吸收方面受到了广泛的关注。然而，由于应力集中和抗冲击性差，它们的脆性断裂限制了它们的应用。在本文中，我们提出了一种基于像素化体心立方（BCC）结构框架的新型混合晶格结构，具有优异的抗冲击性。多胞杂化晶格结构减轻了应力集中，并通过定制应力传递路径抑制剪切带的形成，从而阻碍裂纹扩展。利用这种结构，我们开发了多胞混合晶格结构，该结构具有比传统结构更好的抗冲击性能。进行了准静态压缩和分压霍普金森杆（SHPB）试验。采用有限元分析（FEA）研究了混合晶格结构在单轴压缩、剪切和静水载荷作用下的各向异性，进一步揭示了混合晶格结构性能改善的机制。通过利用混合晶格结构来协调动态变形，这项工作为设计用于航空航天工程、汽车设计和包装的高性能、抗冲击材料建立了一个可推广的框架。

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引用次数: 0