【新文速递】2025年2月23日固体力学SCI期刊最新文章

 

今日更新：International Journal of Solids and Structures 1 篇，Mechanics of Materials 1 篇，International Journal of Plasticity 1 篇，Thin-Walled Structures 6 篇

International Journal of Solids and Structures

Green’s functions of size-dependent Timoshenko beams: Gradient elasticity versus stress-driven nonlocal theories

Noël Challamel, Ahmad Aftabi Sani

doi:10.1016/j.ijsolstr.2025.113308

尺寸相关Timoshenko梁的Green函数：梯度弹性与应力驱动的非局部理论

In this article, Timoshenko elastic nano-beams modeled by three different models (stress-driven nonlocal integral model, strain gradient elastic model without transversal strain gradient, and strain gradient elastic model with transversal strain gradient effect) are analyzed by the help of Green’s function method. Conventionally, the governing boundary value problem (BVP) for Timoshenko nano-beams consists of two differential equations (DEs) and six boundary conditions (BCs) with two unknown dependent variables, i.e., (1) the cross-sectional rotation function, and (2) the transverse displacement field. In the stress-driven model, this multi-field problem is converted into a new single-field BVP including a single higher order DE with only one dependent variable. Obviously, this recent problem needs some new BCs which are rigorously derived in the second step of formulation. The third, and in fact, the last step of the proposed formulation is to solve the new organized BVP by the means of Green’ function. However, in the strain gradient model, the BVP consists of two six-order DEs with two unknown functions. Also, this problem includes twelve boundary conditions which eight of them are “decoupled” and four of them are “coupled” which should be solved simultaneously. To the best of knowledge to the researchers, the current study is a first successful attempt to solve a BVP with some “coupled” boundary conditions by Green’s function. As an instance, the Green’s function of simply supported Timoshenko nano-beams is obtained for both (1) stress-driven nonlocal integral model, and (2) strain gradient elastic model which, respectively, contain symmetric and non-symmetric kernels. Alongside the graphical presentation of the Green’s functions, the results of all models are presented for several loading including the distributed loads expressed by the help of polynomials with higher degrees (equal or more than two) and sinusoidal distributed loading.

本文利用格林函数法对应力驱动非局部积分模型、不含横向应变梯度的应变梯度弹性模型和具有横向应变梯度效应的应变梯度弹性模型三种不同模型下的Timoshenko弹性纳米梁进行了分析。通常，Timoshenko纳米梁的控制边值问题（BVP）由两个微分方程（DEs）和六个边界条件（bc）组成，其中两个未知因变量为(1)截面旋转函数和(2)横向位移场。在应力驱动模型中，这个多场问题被转化为一个新的单场问题，其中包含一个只有一个因变量的高阶DE。显然，这个新问题需要一些新的bc，这些bc是在第二步公式中严格推导出来的。第三步，实际上也是最后一步，是通过Green函数来解决新的有组织的BVP。然而，在应变梯度模型中，BVP由两个具有两个未知函数的六阶微分方程组成。同时，该问题包含12个边界条件，其中8个是“解耦”的，4个是“耦合”的，需要同时求解。据研究人员所知，目前的研究是第一次成功地尝试用格林函数求解具有一些“耦合”边界条件的BVP。以包含对称核和非对称核的(1)应力驱动非局部积分模型和(2)应变梯度弹性模型为例，得到了简支Timoshenko纳米梁的Green函数。除了格林函数的图形表示外，还给出了几种荷载的所有模型的结果，包括由高次多项式（等于或大于2次）表示的分布荷载和正弦分布荷载。

Mechanics of Materials

Novel uniaxial and biaxial reverse experiments for material parameter identification in an advanced anisotropic cyclic plastic-damage model

Zhichao Wei, Steffen Gerke, Michael Brünig

doi:10.1016/j.mechmat.2025.105294

在先进的各向异性循环塑性损伤模型中进行材料参数识别的新型单轴和双轴反向试验

This paper discusses the calibration and verification of material parameters based on novel one-axis and biaxial reverse experiments. The uniaxially loaded tension-compression (TC-), one-axis-loaded shear, and biaxially loaded HC-specimens are designed to perform different cyclic experiments, covering a wide range of stress triaxialities. Special anti-buckling clamping jaws and a newly designed downholder are used during the experiments to avoid buckling under compression loads. During the experiments, strain fields are recorded and analyzed using the digital image correlation (DIC) technique. A combination of direct and indirect fitting approaches is employed to identify the essential elastic–plastic material parameters for the proposed advanced elastic–plastic-damage constitutive model. The characterization of damage parameters is not discussed in this paper. A quantitative error analysis method is introduced to check the quality of the numerical simulation using the obtained material parameters. The comparison between experimental and numerical results demonstrates that the proposed damage model with identified parameters can predict global load–displacement curves and local strain fields with good accuracy.

本文讨论了基于新型单轴和双轴反实验的材料参数标定与验证。单轴加载的拉伸压缩（TC-）、单轴加载的剪切和双轴加载的hc -试件进行不同的循环试验，涵盖了广泛的应力三轴性。实验中采用了特殊的防屈曲夹爪和新设计的下托器，以避免在压缩载荷下的屈曲。在实验过程中，利用数字图像相关技术记录和分析了应变场。采用直接拟合和间接拟合相结合的方法，对所提出的先进弹塑性损伤本构模型的基本弹塑性材料参数进行识别。本文未讨论损伤参数的表征。介绍了一种定量误差分析方法，利用得到的材料参数检验数值模拟的质量。实验结果与数值结果的对比表明，基于识别参数的损伤模型能够较好地预测整体载荷-位移曲线和局部应变场。

International Journal of Plasticity

Enhancing fatigue life of low-carbon ultra-high strength steel by inducing multi-component precipitates

Xiaocong Yang, Yuezhang Ju, Chengning Li, Chang Gao, Lingzhi Ba, Shipin Wu, Ce Wang, Taihao Ding, Ying Wang, Xinjie Di

doi:10.1016/j.ijplas.2025.104287

通过诱导多组分析出提高低碳超高强度钢的疲劳寿命

In this study, the low-carbon ultra-high-strength steels with precipitation-free were prepared using quenching processes, and the co-precipitation strengthening of multi-scale Cu-rich and NiAl were designed to enhance fatigue performance through quenching-tempering (QT) and quenching-partitioning-tempering (QPT) processes respectively. The microstructure of quenched steel shows a typical mixed microstructure of lath martensite (LM) and granular bainite (GB). After aging at 550 °C for 1 h, the high density (1.945 × 1023 m-3) of B2-NiAl and B2 core-9R shell nanoparticles were uniformly co-precipitated and greatly increased the yield strength and high-cycle fatigue strength from 965 MPa and 384.6 MPa to 1548 MPa and 510.7 MPa, respectively. The substantial improvement in fatigue performance is attributed to the large number of small-sized nanoparticles that hinder the movement of dislocations to form high-density dislocation tangles (HDDTs) and cell structures, reducing the stress concentration at grain boundaries. Furthermore, geometric phase analysis (GPA) revealed the existence of micro-strain around small-sized multi-component precipitates, which is less likely to cause micro-crack initiation, thereby enhancing the fatigue performance. After QPT treatment, the co-precipitated nanoparticles exhibited multi-scale distribution with a significantly reduced number density of 1.005 × 1023 m-3, and the typical large-sized FCC-Cu particles are identified, which weakens the precipitation strengthening and leads to the yield strength and fatigue strength reached 1396 MPa and 424.5 MPa respectively. Furthermore, the GNDs obviously accumulate at the interface between reversed austenite (RA) and matrix by the movement of dislocations and bypassed nanoparticles, which increases the tendency of microcrack initiation at the interface. In addition, the high strain accumulated at the interface of FCC-Cu particles increases the risk of fatigue damage and limits the improvement of fatigue performance.

本研究采用淬火工艺制备了无析出的低碳超高强度钢，设计了多尺度富cu和NiAl共析出强化，分别通过调质（QT）和淬火-配分-回火（QPT）工艺提高疲劳性能。淬火钢的组织为典型的条状马氏体（LM）和粒状贝氏体（GB）混合组织。550℃时效1 h后，高密度（1.945 × 1023 m-3）的B2- nial纳米粒子和B2核- 9r壳纳米粒子均匀共析出，屈服强度和高周疲劳强度分别从965 MPa和384.6 MPa大幅提高到1548 MPa和510.7 MPa。大量的小尺寸纳米颗粒阻碍了位错的移动，形成高密度位错缠结（HDDTs）和细胞结构，减少了晶界处的应力集中，从而显著改善了疲劳性能。此外，几何相分析（GPA）表明，小尺寸多组分析出物周围存在微应变，不易引发微裂纹，从而提高了疲劳性能。经QPT处理后，共析出的纳米颗粒呈多尺度分布，数量密度显著降低，为1.005 × 1023 m-3，具有典型的大尺寸FCC-Cu颗粒，其析出强化减弱，屈服强度和疲劳强度分别达到1396 MPa和424.5 MPa。此外，由于位错和旁路纳米颗粒的运动，gds在逆奥氏体与基体的界面处明显富集，增加了界面处微裂纹萌生的倾向。此外，FCC-Cu颗粒界面处积累的高应变增加了疲劳损伤的风险，限制了疲劳性能的提高。

Thin-Walled Structures

Compressive failure mechanisms of fibre metal laminates with 2/1 and 3/2 configurations after low-velocity impact

Zheng-Qiang Cheng, Jie Xia, Hu Liu, Zhi-Wu Zhu, Wei Tan

doi:10.1016/j.tws.2025.113112

低速冲击后2/1和3/2结构金属纤维层合板压缩破坏机理

The residual compressive strength after low-velocity impact (LVI) serves as a pivotal metric for assessing the damage tolerance of composite structures. This paper aims to elucidate the compressive failure mechanisms of glass fibre/aluminium fibre metal laminates (FMLs) that have incurred initial LVI damage, meanwhile illustrating the effects of fibre orientation, impact energy and laminate configuration on the compressive failure behaviours of FMLs. Initially, specific impact damage was prefabricated and examined in FMLs with 2/1 and 3/2 configurations. Quasi-static compression tests were then conducted to analyse the global force versus displacement responses and local strain evolution of FMLs during compressive loading. Furthermore, visual inspection, ultrasonic C-scan, and CT-scan were employed to explain the damage morphologies and failure mechanisms of FMLs. Finally, the comparative analysis of the compression after impact (CAI) strengths was conducted for different FMLs. The results demonstrate that fibre orientation, impact energy and laminate configuration significantly affect the compressive mechanical responses and damage morphologies of FMLs. Moreover, FMLs experience a 40%-61% decrease in compressive strength after LVI within the energy range from 35 J to 65 J. Additionally, the 3/2 configuration is a more advantageous laminate design than the 2/1 configuration in terms of specific CAI strength and residual strength ratio. This research contributes novel insights into the impact damage tolerance of FMLs, which hold promise as load-bearing structural materials in aeronautic applications.

低速冲击后的残余抗压强度是评价复合材料结构损伤容限的关键指标。本文旨在阐明发生初始LVI损伤的玻璃纤维/铝纤维金属层压板（FMLs）的压缩破坏机制，同时说明纤维取向、冲击能和层压板构型对FMLs压缩破坏行为的影响。最初，在2/1和3/2结构的FMLs中预制和检查特定的冲击损伤。然后进行了准静态压缩试验，分析了压缩加载过程中FMLs的整体力-位移响应和局部应变演变。此外，采用目视检查、超声c -扫描和ct扫描来解释FMLs的损伤形态和破坏机制。最后，对不同FMLs的冲击后压缩强度进行了对比分析。结果表明，纤维取向、冲击能和层状结构对FMLs的压缩力学响应和损伤形态有显著影响。此外，在35 J ~ 65 J的能量范围内，LVI后fml的抗压强度下降了40% ~ 61%。此外，在比CAI强度和残余强度比方面，3/2配置比2/1配置更有利。该研究为FMLs的冲击损伤容限提供了新的见解，FMLs有望成为航空应用中的承重结构材料。

Dynamic response analysis of wind turbine tower with high aspect ratio: Wind tunnel tests and CFD simulation

Dong Li, Yuan Sang, Zhihao Lv, Keda Wu, Zhichao Lai

doi:10.1016/j.tws.2025.113113

大展弦比风力机塔架动力响应分析：风洞试验与CFD模拟

With larger rotors and taller towers developed to capture more wind energy, the wind turbine structures are becoming more flexible with aspect ratio increasing. However, there remains a strong gap of dynamic analysis of fully coupled high-aspect-ratio wind turbine tower system. This study employed the IEA 15 WM wind turbine as a reference prototype, and designed a scaled model based on the geometric, kinematic, and dynamic similarity principles. Then, the systematic investigations of dynamic behavior of coupled wind turbine tower system were performed tested combined wind tunnel tests with computational fluid dynamics (CFD) modelling. The dynamic behavior was analyzed in terms of acceleration and displacement responses, motion trajectories, and dynamic characteristics in both crosswind and downwind directions. In CFD modelling, the aerodynamic characteristics were revealed in terms of the average pressure coefficient, fluctuating pressure coefficient, and lift and drag forces. Parameter discussions were performed including the blade rotation, turbulence intensity and wind speed. The results indicate that turbine vibrations are highly sensitive to variations in wind speed and turbulence. As wind speed and turbulence increase, the range of vibration data expands, with peak responses amplified by 249.70% and 59.63%, respectively, and lift forces increasing by over 40%. Furthermore, blade rotation increases the average pressure coefficient by up to 42.09%. Compared to the previous studies of low-aspect-ratio wind turbine tower case, high-aspect-ratio wind turbine tower exhibit significantly more intense vibrations in the same operating cases, with an increase in the root mean square (RMS) of acceleration up to 52.50%. Additionally, the slender tower structures are more susceptible to higher-order frequency excitations induced by fluid solid interactions during operation.

随着更大的转子和更高的塔的发展，以捕获更多的风能，风力涡轮机结构变得更加灵活，宽高比增加。然而，对于全耦合大展弦比风力机塔架系统的动力学分析，目前还存在较大的空白。本研究以IEA 15wm风力机为参考原型，基于几何、运动学和动力学相似原理设计了比例模型。在此基础上，采用计算流体力学（CFD）建模的方法，对耦合风塔系统的动力特性进行了系统的研究。从加速度和位移响应、运动轨迹以及侧风和下风方向的动力特性等方面分析了其动力特性。在CFD建模中，从平均压力系数、波动压力系数、升力和阻力等方面揭示了气动特性。对叶片转速、湍流强度、风速等参数进行了讨论。结果表明，涡轮振动对风速和湍流的变化非常敏感。随着风速和湍流度的增加，振动数据范围扩大，峰值响应分别放大了249.70%和59.63%，升力增加了40%以上。叶片旋转可使平均压力系数提高42.09%。与以往研究的低展弦比风机塔架工况相比，在相同工况下，高展弦比风机塔架振动强度明显增强，加速度均方根（RMS）提高了52.50%。此外，细长的塔结构在运行过程中更容易受到流固相互作用引起的高阶频率激励。

Nonlinear forced vibration and stability analysis of a rotating three-dimensional cantilever beam with variable cross-section

Hang Li, Guo Yao

doi:10.1016/j.tws.2025.113104

变截面旋转三维悬臂梁的非线性强迫振动及稳定性分析

This article investigates the nonlinear forced vibration of a rotating three-dimensional variable cross-section cantilever beam under uniformly distributed harmonic loads. Incorporating the effects of Coriolis terms, static axial deformation, and geometric nonlinearity, the nonlinear partial differential equations for a rotating variable cross-section Euler-Bernoulli beam are derived using Hamilton's principle. The Galerkin method discretizes these equations into nonlinear ordinary differential equations. Numerical simulations are conducted to present the amplitude-frequency and time-history responses, illustrating the nonlinear dynamic characteristics of the rotating variable cross-section cantilever beam. The effects of rotational speed, hub radius, excitation amplitude, and cross-section change rate on the stability, nonlinear principal resonance, and superharmonic resonance of the rotating beam system are discussed. Results show the fundamental natural frequency increases with the increase of the hub radius, rotational speed, and cross-section change rate. Furthermore, the cross-section change rate significantly impacts the nonlinear vibration response of the system.

本文研究了均布谐波荷载作用下旋转三维变截面悬臂梁的非线性强迫振动问题。结合科里奥利项、静态轴向变形和几何非线性的影响，利用汉密尔顿原理推导了旋转变截面欧拉-伯努利梁的非线性偏微分方程。伽辽金方法将这些方程离散为非线性常微分方程。通过数值模拟，给出了旋转变截面悬臂梁的幅频响应和时程响应，揭示了其非线性动力特性。讨论了转速、轮毂半径、激励幅值和截面变化率对旋转梁系统稳定性、非线性主共振和超谐波共振的影响。结果表明：基频随轮毂半径、转速和截面变化率的增大而增大；此外，截面变化率对系统的非线性振动响应有显著影响。

Creep behavior modeling of nickel-based superalloy foil structures in gas foil bearings

Zhenni Xu, Chaozhe Jin, Changlin Li, Jianjun Du

doi:10.1016/j.tws.2025.113105

气体箔轴承中镍基高温合金箔结构蠕变行为建模

Gas foil bearings are self-acting aerodynamic bearings that use nickel-based superalloy foil structures as the load-carrying element. This type of bearing has great potential in high-temperature and high-speed turbomachinery but faces serious challenges in maintaining a long service life in extreme environments. Creep behaviors of foil structures are inevitable when the bearings are exposed to high temperatures for prolonged periods. In this paper, we innovatively propose a finite element model to investigate the steady-state creep behavior of foil structures, considering both the creep effects and nonlinear contact behaviors. Uniaxial creep tests are conducted using miniature specimens to obtain the material constants in the Norton creep model of Inconel 718. The reasonability of the model is verified by comparing predictions with the ANSYS simulation results, demonstrating its ability to accurately describe the evolution of creep displacement, stress, and strain in foil structures. The significant differences in creep displacements at different positions of the foil structure are explained by analyzing the distributions of equivalent stress and principal stress. Overall, the bump foil exhibits more pronounced creep displacements than the top foil, especially in the peak region of bumps and the flat segment between adjacent bumps near the free end.

气体箔轴承是采用镍基高温合金箔结构作为承载元件的自作用气动轴承。这种类型的轴承在高温和高速涡轮机械中具有很大的潜力，但在极端环境中保持较长的使用寿命面临着严峻的挑战。当轴承长时间暴露在高温下时，箔结构的蠕变行为是不可避免的。在本文中，我们创新地提出了一个有限元模型来研究箔结构的稳态蠕变行为，同时考虑了蠕变效应和非线性接触行为。采用微型试样进行了单轴蠕变试验，得到了Inconel 718的Norton蠕变模型中的材料常数。通过与ANSYS仿真结果的对比，验证了该模型的合理性，证明了该模型能够准确地描述箔片结构的蠕变位移、应力和应变的演化过程。通过分析等效应力和主应力的分布，解释了箔片结构不同位置蠕变位移的显著差异。总体而言，凸起箔比顶部箔表现出更明显的蠕变位移，特别是在凸起的峰值区域和靠近自由端的相邻凸起之间的平坦段。

A Deep Learning Method for Addressing the Scarcity of Experimental Data in Composite Structures: Multi-Fidelity Triple LSTM

Kairui Tang, Yiyang Cui, Puhui Chen

doi:10.1016/j.tws.2025.113106

一种解决复合结构中实验数据稀缺性的深度学习方法：多保真度三重LSTM

High-precision numerical simulations and physical experiments for composite structure design are costly and limited. Neural networks offer a promising solution, but conventional models rely heavily on large amount of high-fidelity data and struggle to handle the complex variable space introduced by layup sequences. This paper proposes a deep learning model—Multi-Fidelity Triple LSTM (MF-T-LSTM)—to predict composite mechanical properties using limited test samples. The model uses one LSTM to capture layup sequences and two others to process data at different fidelity levels. The MF-T-LSTM model is applied to predict the tensile load-displacement curve of composite open-hole laminates. A combination of limited experiments and extensive FEM simulations generated the training dataset. The model's components (LSTM-MLP and Dual LSTM) were validated before development. The MF-T-LSTM achieved high prediction accuracy, with an average R 2 of 0.918 on the experimental test set. Quantitative analysis demonstrated its low dependence on low-fidelity (LF) data quality and strong transferability across different LF datasets. Replacing LF dataset with less accurate versions led to only a 1.4% average drop in performance. These results underscore the MF-T-LSTM model's advantages in predicting composite mechanical responses and reducing experimental costs.

用于复合材料结构设计的高精度数值模拟和物理实验成本高且有局限性。神经网络提供了一个很有前途的解决方案，但传统的模型严重依赖于大量高保真度的数据，并且难以处理由分层序列引入的复杂变量空间。本文提出了一种深度学习模型-多保真度三重LSTM （MF-T-LSTM）来利用有限的测试样本预测复合材料的力学性能。该模型使用一个LSTM捕获叠加序列，另外两个LSTM以不同的保真度处理数据。应用MF-T-LSTM模型预测复合材料开孔层合板的拉伸载荷-位移曲线。有限的实验和广泛的FEM模拟相结合产生了训练数据集。模型的组件（LSTM- mlp和Dual LSTM）在开发前进行了验证。MF-T-LSTM具有较高的预测精度，平均R 2的0.918在实验测试集上。定量分析表明，该方法对低保真度数据质量的依赖性较低，在不同低保真度数据集之间具有较强的可移植性。用不太准确的版本替换LF数据集只会导致性能平均下降1.4%。这些结果强调了MF-T-LSTM模型在预测复合材料力学响应和降低实验成本方面的优势。

Theoretical, experimental, and numerical investigations on friction-metallic hybrid asynchronized-type double-stage shear damper

Cantian Yang, Linlin Xie, Hang Sun, Huiyong Ban, Bingyan Liu, Aiqun Li

doi:10.1016/j.tws.2025.113107

摩擦-金属混合异步式双级剪切阻尼器的理论、实验和数值研究

In this study, a novel friction-metallic hybrid asynchronized-type double-stage shear damper (FMHADSD) was developed. The FMHADSD consists of two frictional units, one asynchronously-activated metallic-yielding unit, and upper and lower ending plates. The FMHADSD is expected to exhibit a double-stage working mechanism. The theoretical equations for the quadrilinear skeleton curve of the FMHADSD were proposed. Full-scale dampers were then designed and tested, and the double-stage working mechanism and performance of the FMHADSD were verified. Furthermore, a refined numerical investigation was conducted to analyze stress distribution and validate the rationality of the FMHADSD configuration. Subsequently, a uniaxial material model was developed and implemented in OpenSees to simulate the hysteretic behavior of FMHADSD, providing an accurate and efficient approach for the seismic response analysis of structures equipped with FMHADSDs.

研制了一种新型的摩擦-金属混合异步式双级剪切阻尼器（FMHADSD）。FMHADSD由两个摩擦单元、一个异步激活的金属屈服单元以及上下端板组成。预计fmhasd将采用双阶段工作机制。建立了FMHADSD四线性骨架曲线的理论方程。设计并测试了全尺寸阻尼器，验证了双级阻尼器的工作机理和性能。此外，还进行了精细化的数值研究，分析了fmhasd结构的应力分布，验证了结构的合理性。随后，在OpenSees中开发并实现了单轴材料模型来模拟FMHADSD的滞回行为，为配备FMHADSD的结构的地震反应分析提供了准确有效的方法。