今日更新：International Journal of Solids and Structures 1 篇，Journal of the Mechanics and Physics of Solids 1 篇，Thin-Walled Structures 8 篇International Journal of Solids and StructuresExperimental and numerical analysis of mixed mode bending of adhesive-bonded and hybrid honeycomb core sandwich structuresA. Kumar, P.J. Saikia, R.Ganesh Narayanan, N. Muthudoi:10.1016/j.ijsolstr.2024.113177粘接与杂化蜂窝芯夹层结构混合模态弯曲试验与数值分析This study investigates the potential of a hybrid joining method, called friction stir spot welding with disc and adhesive bonding (FSSW_D_AB), for bonding honeycomb core sandwich structures, offering an alternative to traditional adhesive bonding (AB) sandwich structures. The research focuses on the manufacturing of these hybrid joints and evaluating their performance compared to conventional adhesive bonding (AB) methods. Mixed Mode Bending (MMB) tests were performed to assess the mechanical behaviour of the joints under different loading conditions. Additionally, numerical analysis using cohesive zone modeling (CZM) was performed using both a honeycomb core with a cohesive layer and the homogenized core with an equivalent cohesive layer. The study reveals that the hybrid joining method significantly enhances the performance of honeycomb sandwich structures. The good agreement between the numerical predictions and the experimental results for all types of joints showed the usefulness of the proposed numerical model. However, the FEM-based stress and damage analyses of the joints provided crucial results on normal and shear stress distributions and delamination.本研究探讨了一种混合连接方法的潜力，称为搅拌摩擦点焊与圆盘和粘合剂粘合（FSSW_D_AB），用于粘合蜂窝芯夹层结构，为传统的粘合剂粘合（AB）夹层结构提供了一种替代方案。研究重点是这些混合接头的制造，并与传统的粘接（AB）方法相比，评估其性能。通过混合模态弯曲（MMB）试验，评估了不同加载条件下节点的力学性能。此外，利用粘聚区模型（CZM）对蜂窝核进行了数值分析，其中蜂窝核有粘聚层，蜂窝核有等效粘聚层。研究表明，混合连接方法显著提高了蜂窝夹层结构的性能。所有类型节理的数值预测结果与实验结果吻合较好，表明了所建数值模型的有效性。然而，基于有限元的关节应力和损伤分析提供了重要的法向和剪切应力分布和分层结果。Journal of the Mechanics and Physics of SolidsRupture Mechanics of Blood Clot Fibrin Fibers: A Coarse-Grained Model StudyBeikang Gu, Jixin Hou, Nicholas Filla, He Li, Xianqiao Wangdoi:10.1016/j.jmps.2024.105998血凝块纤维蛋白纤维破裂力学：粗粒度模型研究Thrombosis, when occurring undesirably, disrupts normal blood flow and poses significant medical challenges. As the skeleton of blood clots, fibrin fibers play a vital role in the formation and fragmentation of blood clots. Thus, studying the deformation and fracture characteristics of fibrin fiber networks is the key factor to solve a series of health problems caused by thrombosis. This study employs a coarse-grained model of fibrin fibers to investigate the rupture dynamics of fibrin fiber networks. We propose a new method for generating biomimetic fibrin fiber networks to simulate their spatial geometry in blood clots. We examine the mechanical characteristics and rupture behaviors of fibrin fiber networks under various conditions, including fiber junction density, fiber tortuosity, fiber strength, and the strain limit of single fiber rupture in both tension and simple shear cases. Our findings indicate that the stress-strain relationship of the fibrin fiber network follows a similar pattern to that of individual fibers, characterized by a shortened entropy stretching phase and an extended transition phase. Fiber junction density, fiber strength, and single fiber rupture limit predominantly influence the stress of the network, while fiber tortuosity governs the strain behavior. The availability of more fibers in shear cases to bear the load results in delayed rupture compared to tension cases. With consideration of different factors of fibrin fibers in networks, this work provides a more realistic description of the mechanical deformation process in fibrin fiber networks, offering new insights into their rupture and failure mechanisms. These findings could inspire novel approaches and methodologies for understanding the fracture of fibrin networks during a surgical thrombectomy.当不希望发生血栓时，它会破坏正常的血液流动，并带来重大的医疗挑战。纤维蛋白纤维作为血凝块的骨架，在血凝块的形成和破碎中起着至关重要的作用。因此，研究纤维蛋白纤维网络的变形和断裂特性是解决血栓形成引起的一系列健康问题的关键因素。本研究采用粗粒度的纤维蛋白纤维模型来研究纤维蛋白纤维网络的断裂动力学。我们提出了一种生成仿生纤维蛋白纤维网络的新方法来模拟其在血凝块中的空间几何形状。我们研究了纤维蛋白纤维网络在不同条件下的力学特性和断裂行为，包括纤维结密度、纤维弯曲度、纤维强度以及单纤维在拉伸和简单剪切情况下断裂的应变极限。我们的研究结果表明，纤维蛋白纤维网络的应力-应变关系遵循与单个纤维相似的模式，其特征是熵拉伸阶段缩短，过渡阶段延长。纤维结密度、纤维强度和单纤维断裂极限主要影响网络的应力，而纤维弯曲度主要影响网络的应变行为。与拉伸情况相比，更多的纤维在剪切情况下承受载荷导致延迟断裂。考虑到纤维蛋白纤维在网络中的不同影响因素，本研究更真实地描述了纤维蛋白纤维网络的力学变形过程，为纤维蛋白纤维网络的断裂破坏机制提供了新的认识。这些发现可以激发新的方法和方法来理解外科血栓切除术中纤维蛋白网络的断裂。Thin-Walled StructuresMulti-crack damage identification and quantification using Lamb wave-based structural health monitoringXianping Zeng, Jiajia Yan, Qijian Liu, Bowen Zhao, Xinlin Qingdoi:10.1016/j.tws.2024.112782基于Lamb波的结构健康监测多裂纹损伤识别与量化The simultaneous presence of multi-crack damage in a structural component is a crucial issue affecting system safety. To address the accurate and quantitative monitoring of multi-crack damage in an aeronautical structure, an innovative multi-crack damage localization, orientation and quantification algorithm using Lamb wave-based structural health monitoring is presented in this paper. An improved Hausdorff distance-based weighted average imaging methodology is introduced for precise multi-crack damage position identifications. To account for the critical role of crack orientation in damage quantification, a cross-orthogonality-based method is developed, enabling orientation detection at arbitrary positions and angles while simplifying the problem into a mathematical formulation. A wave scattering sources-based quantification algorithm incorporating the estimated position and orientation information is further proposed to estimate the multi-crack lengths. Additionally, a singular elliptic trajectories removal scheme is presented to suppress useless ambient noise and enhance the damage information discriminability. Experiments on the aircraft wing-box structure of a real airplane are implemented to substantiate the proposed techniques. Due to the outstanding properties, such as flexibility, electrically stabilized and applicability to complex structures, the sensor layer with built-in PZT sensor network surface-installed on the monitored structure is adopted to generate and receive Lamb wave signal. The results manifest that the proposed monitoring algorithm, without prior information or calibration required, is effective and straightforward for detecting multi-crack damage. This study can also provide a feasible technique for accurately locating and quantitatively identifying cracks in some concealed parts or inside the structure.结构构件同时存在多裂纹损伤是影响系统安全的关键问题。为解决航空结构多裂纹损伤的精确定量监测问题，提出了一种基于Lamb波的结构健康监测多裂纹损伤定位、定位和量化的创新算法。提出了一种改进的基于Hausdorff距离的加权平均成像方法，用于多裂纹损伤位置的精确识别。考虑到裂纹方向在损伤量化中的关键作用，提出了一种基于交叉正交性的方法，可以在任意位置和角度进行方向检测，同时将问题简化为数学公式。在此基础上，提出了一种结合估计的位置和方位信息的基于波散射源的多裂纹长度量化算法。此外，提出了一种奇异椭圆轨迹去除方案，以抑制无用的环境噪声，提高损伤信息的可分辨性。最后对某型飞机的翼箱结构进行了实验验证。由于传感器具有柔韧性、电稳定性和适用于复杂结构等突出特性，因此采用内置PZT传感器网络的传感器层，将其表面安装在被监测结构上，产生和接收兰姆波信号。结果表明，该监测算法在不需要先验信息和校正的情况下，对多裂纹损伤的检测是有效和直接的。该研究也为某些隐蔽处或结构内部的裂缝精确定位和定量识别提供了一种可行的技术。Energy absorption properties of dimpled circular tubes: Experimental and numerical studiesChang Zhou Fu, Yi Zhang, Xing Chi Teng, Wei Zhong Jiang, Xi Hai Ni, Xiang Sun, Xin Rendoi:10.1016/j.tws.2024.112785凹形圆管的能量吸收特性：实验与数值研究As an exemplary energy absorption structure, thin-walled metallic tubes have been extensively studied. Introducing dimple defects into the tube wall can induce the desired deformation in thin-walled metallic tubes to enhance their energy absorption performance. Existing research has only discussed dimpled tubes with relatively thin wall thicknesses and shallow dimples, which is insufficient to meet the demands of widespread applications. This study introduces two novel tubular structures by incorporating predefined dimples into the walls of smooth tubes. Through finite element simulation and experiment, the influence of wall thickness, dimple aspect ratio, and the orientation of the dimples on the energy absorption capacity of the structures is parametrically analyzed. A comparison with traditional smooth tubes is also conducted. The results indicate that the wall thickness, dimple aspect ratio, and orientation of the dimples have significant effects on reducing the initial peak force, enhancing specific energy absorption, and improving structural stability. By appropriately selecting geometric parameters, energy absorption tubular structures adaptable to various application scenarios can be designed. The two novel tubular structures proposed provide new design insights for the study of energy absorption in thin-walled metallic tubes.作为一种典型的吸能结构，薄壁金属管得到了广泛的研究。在薄壁金属管的管壁上引入韧窝缺陷可以引起所需的变形，从而提高薄壁金属管的吸能性能。现有的研究只讨论了壁厚相对较薄、微窝较浅的微窝管，不足以满足广泛应用的要求。本研究引入了两种新型管状结构，通过在光滑管的壁上加入预定义的凹窝。通过有限元模拟和实验，参数化分析了壁厚、凹痕长径比和凹痕方向对结构吸能能力的影响。并与传统光滑管进行了比较。结果表明，壁厚、凹窝长径比和凹窝取向对减小初始峰值力、提高比能吸收、提高结构稳定性有显著影响。通过合理选择几何参数，可以设计出适应各种应用场景的吸能管状结构。提出的两种新型管状结构为薄壁金属管的能量吸收研究提供了新的设计思路。Simulation and cross-section design of steel beams under moment gradientsZichang Yang, Xin Meng, Fiona Walport, Leroy Gardnerdoi:10.1016/j.tws.2024.112786弯矩梯度作用下钢梁的模拟与截面设计A systematic study into the effect of moment gradients on the cross-section resistance of hot-rolled steel square hollow section (SHS), rectangular hollow section (RHS) and I-section beams has been conducted and is presented in this paper. Finite element (FE) models were first developed and validated against test results from the literature; parametric studies covering different steel grades, cross-section geometries and moment distributions were then carried out. It was found that cross-section bending resistances increase with increasing moment gradient in the low to intermediate range, despite the necessary rise in the level of co-existent shear. Under high moment gradients, the negative impact of the high co-existent shear outweighs the positive influence of the moment gradient, and cross-section bending resistances fall. It was found that the benefits from moment gradients vary with the cross-section slenderness and the aspect ratio of the cross-section, and increase when intermediate web stiffeners are present. A new design method that captures the observed behaviour is devised, featuring a new parameter to describe the local moment gradient in beams under different loading conditions. The proposed design equations are shown to be more accurate than existing provisions in EC3 and to meet the reliability requirements set out in EN 1990. The new method is therefore deemed to be suitable for implementation within the EC3 framework.本文系统地研究了弯矩梯度对热轧钢方空心截面、矩形空心截面和工字钢截面梁截面阻力的影响。首先开发了有限元（FE）模型并根据文献中的测试结果进行了验证；参数化研究涵盖了不同的钢种、截面几何形状和弯矩分布。结果表明，在低至中弯矩梯度范围内，截面抗弯阻力随弯矩梯度的增大而增大，尽管共存剪切水平有必要提高。在高弯矩梯度下，高共存剪力的负面影响大于弯矩梯度的正面影响，截面抗弯阻力下降。结果表明，弯矩梯度的效益随截面长细比和截面长径比的变化而变化，当存在中间腹板加强筋时，弯矩梯度的效益增加。设计了一种新的设计方法来捕捉观察到的行为，采用新的参数来描述不同荷载条件下梁的局部弯矩梯度。所提出的设计方程被证明比EC3中现有的规定更准确，并满足en1990中规定的可靠性要求。因此，新方法被认为适合在EC3框架内实现。Axisymmetric thermal post-buckling of the eccentric annular sector plate made of Gori-metamaterials: Introducing DNN-RF algorithm for solving the post-buckling problemsPeyman Mehrabi, Mina Mortazavi, Harry Fardoi:10.1016/j.tws.2024.112795偏心环形扇形板轴对称热后屈曲：引入DNN-RF算法求解后屈曲问题Composite eccentric annular sector plates are frequently utilized in engineering. This structure is crucial in the manufacturing, aircraft, nuclear, and construction industries due to its asymmetrical geometry. So, in this work for the first time, thermal-post buckling analysis of the composite eccentric annular sector plate made of graphene origami enriched auxetic metamaterial (GOEAM) is presented. To improve the stability of this kind of structure, the GOEAM composite eccentric annular sector plate is surrounded by an auxetic concrete foundation. To estimate the nonlinear thermal buckling information of the presented structure using a hybrid machine learning algorithm, a dataset is needed. Due to the lack of thermal post-buckling datasets for the presented composite eccentric annular sector plate, a mathematical simulation is presented. In the mathematical simulation (MS) section, quasi-3D refined theory (Q3D-RT), Von-Karman nonlinearity, minimum total potential energy principle, and Haber-Schaim formulations are used to generate the governing and boundary equations of the GOEAM annular sector plates surrounded by auxetic concrete foundation. After extracting the governing equations, they are solved via the transformed differential quadrature method (TDQM) with the aid of differential quadrature (DQ) weighting coefficients. After obtaining the datasets using MS, in the artificial intelligence domain, the results for future research of thermal post-buckling of the GOEAM composite eccentric annular sector plate surrounded by the auxetic concrete foundation are tested, trained, and validated. So, with the presented datasets of thermal post-buckling of the GOEAM composite eccentric annular sector plate surrounded by auxetic concrete foundation, this kind of structure using a machine learning algorithm can be simulated in other complex situations.复合偏心环形扇形板在工程中应用较多。由于其不对称的几何形状，这种结构在制造业，飞机，核能和建筑业中至关重要。因此，本文首次对石墨烯折纸富氧超材料（GOEAM）制备的偏心环形扇形复合材料板进行了热后屈曲分析。为了提高这类结构的稳定性，在GOEAM复合偏心环形扇形板的周围设置了减量混凝土基础。为了利用混合机器学习算法估计结构的非线性热屈曲信息，需要一个数据集。由于所提出的复合材料偏心环形扇形板缺乏屈曲后的热数据集，提出了数学模拟。在数学模拟（MS）部分，采用准三维精细理论（Q3D-RT）、Von-Karman非线性、最小总势能原理和Haber-Schaim公式，生成了被混凝土基础包围的GOEAM环形扇形板的控制方程和边界方程。提取控制方程后，借助微分正交（DQ）加权系数，采用变换微分正交法求解控制方程。利用MS获取数据集后，在人工智能领域对GOEAM复合材料偏心环形扇形板的失稳后热屈曲研究结果进行了测试、训练和验证。因此，利用本文提出的GOEAM复合材料偏心环形扇形板被混凝土基础包围的热后屈曲数据集，可以利用机器学习算法对这种结构进行其他复杂情况的模拟。Digital Twin-based Online Structural Optimization? Yes, It's Possible!Xiwang He, Liangliang Yang, Zhuangzhuang Gong, Yong Pang, Jianji Li, Ziyun Kan, Xueguan Songdoi:10.1016/j.tws.2024.112796基于数字孪生的在线结构优化？是的，这是可能的！In structural design, simulation technology has been extensively applied. However, simulation-based offline optimization methods encounter two primary limitations: (1) they typically optimize parameters based on a structure's mechanical properties under extreme, static conditions, and (2) they involve complex, time-consuming performance calculations. To address these challenges, this paper introduces a structural online optimization framework driven by shape-performance integrated digital twins (SPI-DTs), which breaks the connection barrier between the real-time dynamics of digital twins and the offline characteristics of traditional optimization under dynamic operating conditions. Initially, the structure's remaining life is calculated online using real-time performance data from the digital twin, with the constraint stress and equivalent load derived via the static load equivalent method. A hierarchical radial basis function is then proposed, which integrates multi-source data for rapid calculation of the structure's target performance under the equivalent load. Finally, structural optimization parameters, determined through topology optimization, are solved using the multi-objective genetic algorithm. The feasibility of the proposed method is demonstrated through typical case studies: the wing cantilever beam and a three-dimensional flat plate. The results show that the weight of the wing cantilever beam case based on size optimization is reduced by 12.07%, and the weight of the flat plate case based on combined topology optimization and size optimization is reduced by 66.66%. In conclusion, the proposed framework offers a viable approach to achieving lightweight design and extending the operational life of structures under real-world conditions.在结构设计中，仿真技术得到了广泛的应用。然而，基于仿真的离线优化方法遇到两个主要限制：(1)它们通常基于极端静态条件下结构的力学性能来优化参数；(2)它们涉及复杂且耗时的性能计算。为了解决这些问题，本文引入了一种基于形状-性能集成数字孪生（spi - dt）驱动的结构在线优化框架，打破了数字孪生的实时动态与动态工况下传统优化的离线特性之间的联系障碍。首先，使用来自数字孪生的实时性能数据在线计算结构的剩余寿命，并通过静载荷等效方法导出约束应力和等效载荷。然后提出了一种分层径向基函数，该函数集成了多源数据，可以快速计算等效荷载下结构的目标性能。最后，通过拓扑优化确定结构优化参数，利用多目标遗传算法求解。通过机翼悬臂梁和三维平板的典型算例验证了该方法的可行性。结果表明，基于尺寸优化的机翼悬臂梁壳体重量减轻了12.07%，基于拓扑优化和尺寸优化相结合的平板壳体重量减轻了66.66%。总之，提出的框架为实现轻量化设计和延长结构在现实条件下的使用寿命提供了一种可行的方法。Electrothermally actuated lattice metamaterials with remarkable shear deformationKai Zhang, Jinyu Ji, Yixing Huang, Hao Wang, Dengbao Xiao, Xiao Kang, Xiaogang Guodoi:10.1016/j.tws.2024.112797具有显著剪切变形的电热驱动晶格超材料Active metamaterials with specific deformation responses present great promise in fields such as multifunctional antennas, stretchable electronic devices and reconfigurable soft robots, due to their ability to switch between different operational states within a single system. However, the previous researches on active metamaterials with shear deformation responses exhibit two issues: inability to further enhance the shear deformation magnitude of the active metamaterials and inability to achieve precise customized design of the metamaterials, such as realizing simple shear deformation. Moreover, the inverse design of active metamaterials is challenging because theoretical models describing the finite deformation of active metamaterials under external-field actuation are lacking. To address the aforementioned issues, this study reports a design strategy for the electrothermally actuated lattice metamaterials to realize remarkable shear deformation with the maximum shear angle exceeding 26° and the capability to precisely achieve desired mechanical responses of the active metamaterials. The shear angle of the electrothermally actuated lattice metamaterials reported in this paper has increased by approximately 82% compared to that achieved in previous studies. Theoretical models for the electrothermally actuated metamaterials are established to describe the shear deformation behaviors. The theoretical models are demonstrated through both qualitative and quantitative comparisons with finite element analyses (FEAs) and experimental results. Theoretical models provide detailed predictions of the configuration after electric heating and offer analytical solutions for crucial mechanical quantities, such as the effective strains and shear angle for the electrothermally actuated lattice metamaterials exhibiting shear deformations. Moreover, experimental results and FEA calculations show that the simple shear deformation mode can be realized in the active metamaterials through the design strategies proposed in this paper, while it cannot be achieved in previous researches. This demonstrates the capability of the design strategies proposed in this paper to precisely realize required mechanical responses of the active metamaterials.具有特定变形响应的活性超材料在多功能天线、可拉伸电子设备和可重构软机器人等领域表现出巨大的前景，因为它们能够在单个系统中在不同的工作状态之间切换。然而，以往对具有剪切变形响应的活性超材料的研究存在两个问题：无法进一步提高活性超材料的剪切变形幅度；无法实现对超材料的精确定制设计，如实现简单的剪切变形。此外，由于缺乏描述外场驱动下活性超材料有限变形的理论模型，因此活性超材料的反设计具有挑战性。针对上述问题，本研究提出了一种电热驱动晶格超材料的设计策略，实现了最大剪切角超过26°的显著剪切变形，并能够精确实现活性超材料所期望的力学响应。本文报道的电热驱动晶格超材料的剪切角比以往的研究结果提高了约82%。建立了电热致动超材料的理论模型来描述其剪切变形行为。通过与有限元分析和实验结果的定性和定量比较，对理论模型进行了验证。理论模型提供了电加热后结构的详细预测，并提供了关键力学量的解析解决方案，例如电热驱动晶格超材料表现出剪切变形的有效应变和剪切角。此外，实验结果和有限元计算表明，通过本文提出的设计策略，可以在活性超材料中实现简单的剪切变形模式，而这是以往研究无法实现的。这证明了本文提出的设计策略能够精确地实现活性超材料所需的力学响应。Dual-nozzle 3D printing of fiber composites for fabrication of compliant lever-type vibration isolators with wide stopbandKoichi Mizukami, Kota Nakamuradoi:10.1016/j.tws.2024.112799双喷嘴3D打印纤维复合材料制造柔性宽阻带杠杆式隔振器This study proposes fiber-composite lever-type vibration isolators with a wide stopband around the antiresonance frequency. The proposed mechanisms were 3D-printed monolithic structures with compliant butterfly hinges that mimic an ideal pinned support for the lever. Continuous carbon fiber and short carbon fiber regions were combined to achieve a wide low-frequency stopband. A rigid link model was developed to derive analytical solutions for the resonance and antiresonance frequencies of the proposed mechanisms. Frequency response analysis and modal analysis were performed to examine designs for widening the stopband using the finite element method. The print path-dependent anisotropy of short fiber-reinforced plastic was reflected in the finite element model. A dual-nozzle fiber-composite 3D printer was used to fabricate the proposed lever-type mechanisms. The measured vibration transmissibilities of the 3D-printed samples showed a similar improvement of the stopband width to the numerical analysis results, demonstrating that suitable designs of continuous fiber placement and hinge shape widened the stopband.本文提出了一种具有宽阻带的纤维复合材料杠杆式隔振器。所提出的机构是3d打印的整体结构，具有柔顺的蝶式铰链，模仿杠杆的理想固定支撑。连续碳纤维区和短碳纤维区相结合，实现了宽低频阻带。建立了刚性连杆模型，推导出了所提机构共振频率和反 共振频率的解析解。采用有限元法进行了频率响应分析和模态分析，以检验加宽阻带的设计。在有限元模型中反映了短纤维增强塑料打印路径相关的各向异性。利用双喷嘴纤维复合材料3D打印机制造了所提出的杠杆式机构。3d打印样品的振动透射率测量结果显示出与数值分析结果相似的阻带宽度改善，表明适当的连续纤维放置和铰链形状设计拓宽了阻带。Optimizing mass transfer performance in triply periodic minimal surface porous scaffolds through isosurface offsetKun Li, Chunlin Zuo, Ruobing Liao, Haisong Liang, Xuan Liang, David Z. Zhang, Lawrence E. Murr, Huajun Caodoi:10.1016/j.tws.2024.112800利用等面偏移优化三周期最小表面多孔支架的传质性能Efficient bone tissue regeneration remains a critical challenge in orthopedic medicine, with scaffold mass transfer capabilities playing a pivotal role. Triply periodic minimal surface (TPMS) scaffolds have emerged as promising candidates due to their unique structure characterized by smooth, continuous surfaces with zero mean curvature and high specific surface area. However, optimizing their mass transfer performance to meet the diverse needs of bone tissues at different anatomical sites has been a persistent challenge. This study addresses this gap by investigating the effects of isosurface offset on mass transfer performance in three TPMS scaffolds (Fisher-Koch S, Gyroid, and Split-P) using computational fluid dynamics (CFD). The results showed that isosurface offset significantly increased the effective scaffold permeability range (by 116.8%, 5.3%, and 64.3% for F, G, and S scaffolds, respectively) and improved the wall shear stress (WSS) distribution, enhancing the area that effectively stimulates cell proliferation (by 25.2%, 8.7%, and 14.3% increase, respectively). Additionally, it was found that porosity, specific surface area, the ratio of maximum pore size to tortuosity, and curvature significantly influenced the permeability and WSS distribution of the scaffolds. Finally, permeation experiments using porous scaffolds fabricated by laser powder bed fusion (LPBF) technology were performed to validate the simulation results. This study provides new insights into the design of TPMS porous scaffolds and customized bone implants, enhancing their application prospects in bone tissue engineering.高效的骨组织再生仍然是骨科医学的关键挑战，支架的质量传递能力起着关键作用。三周期最小表面（TPMS）支架由于其具有光滑、连续、平均曲率为零和高比表面积的独特结构而成为有希望的候选材料。然而，优化其传质性能以满足不同解剖部位骨组织的不同需求一直是一个持续的挑战。本研究利用计算流体动力学（CFD）研究了三种TPMS支架（Fisher-Koch S、Gyroid和Split-P）的等面偏移对传质性能的影响，从而解决了这一空白。结果表明，等面偏移显著增加了F、G和S支架的有效通透性范围（分别增加116.8%、5.3%和64.3%），改善了壁剪切应力（WSS）分布，增加了有效刺 激细胞增殖的面积（分别增加25.2%、8.7%和14.3%）。此外，孔隙率、比表面积、最大孔径与弯曲度之比和曲率对支架的渗透性和WSS分布有显著影响。最后，利用激光粉末床熔融（LPBF）技术制备多孔支架进行渗透实验，验证模拟结果。本研究为TPMS多孔支架和定制骨植入物的设计提供了新的思路，增强了其在骨组织工程中的应用前景。
