【新文速递】2025年5月6日固体力学SCI期刊最新文章

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今日更新：International Journal of Solids and Structures 1 篇，Journal of the Mechanics and Physics of Solids 2 篇，Mechanics of Materials 1 篇，International Journal of Plasticity 1 篇，Thin-Walled Structures 1 篇

International Journal of Solids and Structures

The tensile mechanics of creped fiber networks: Effects of interfacial-delamination, buckling, and damage

Shubham Agarwal, Sheldon I. Green, A. Srikantha Phani

doi:10.1016/j.ijsolstr.2025.113408

蠕变纤维网络的拉伸力学：界面分层、屈曲和损伤的影响

Paper products, like tissue paper, are composed of bonded wood fiber networks. Dry creping is an industrial process used in tissue manufacturing. In this process, a wet paper sheet (web) is adhered to a high-speed metal dryer (substrate). The dried sheet is then scraped off against a stationary metal blade, leading to web-substrate debonding, sheet folding, and damage caused by the rupture of interfiber bonds. This process creates a microfolded structure, leading to a nonlinear tensile response and high failure strain, while sheet-damage results in sheet de-densification (through thickness explosion). Based on the visualized creped structures, creped sheets are classified as shaped-bulk (folding-dominated) or explosive-bulk (damage-dominated). While factors affecting sheet-folding have been studied extensively, the effects of sheet-damage on structural and tensile properties have not been previously studied. Using a Discrete Element Method (DEM) to model low grammage fiber networks, we simulate creping with a bilinear elastoplastic fiber model. We demonstrate that altering sheet–substrate bond (adhesive) properties relative to interfiber bonds shifts creping from shaped-bulk to explosive-bulk. Signatures of the above two creping modes are identified. Shaped-bulk sheets exhibit fewer interfiber bond ruptures, a higher degree-of-folding (waviness), and a less through-thickness explosion, while explosive-bulk sheets show the opposite traits. During tensile deformation, bending dominates initially, followed by an increased axial deformation near failure as unfolding occurs. The transition from shaped-bulk to explosive-bulk creping shows an initial increase in stiffness followed by a decline, and a gradual then rapid, decrease in tensile strength.

纸制品，如薄纸，是由粘合的木纤维网络组成的。干起皱是一种用于纸巾制造的工业过程。在此过程中，湿纸（卷筒纸）粘附到高速金属烘干机（基材）上。然后用固定的金属刀片刮掉干燥后的薄片，导致纤维网基材脱粘、薄片折叠以及纤维间键断裂造成的损坏。该过程产生微折叠结构，导致非线性拉伸响应和高失效应变，而板材损伤导致板材脱致密（通过厚度爆炸）。基于可视化的蠕变结构，将蠕变薄板分为形状块状（褶皱为主）和爆炸块状（损伤为主）两类。虽然影响薄板折叠的因素已被广泛研究，但薄板损伤对结构和拉伸性能的影响尚未得到研究。利用离散元法（DEM）对低克重纤维网络进行建模，采用双线性弹塑性纤维模型模拟蠕变。我们证明，相对于纤维间键，改变板-基板键（胶粘剂）特性可以将蠕变从形状块状转变为爆炸性块状。识别了上述两种蠕变模式的特征。形状块状片状材料纤维间键断裂较少，折叠度（波纹度）较高，穿透厚度爆炸较少，而爆炸块状片状材料则表现出相反的特征。在拉伸变形期间，弯曲最初占主导地位，其次是随着展开发生而增加的轴向变形。从形块蠕变到爆块蠕变的转变表现为刚度先上升后下降，抗拉强度先逐渐下降后迅速下降。

Journal of the Mechanics and Physics of Solids

Universal pull-off force for separating a rigid sphere from a membrane

Wanying Zheng, Zhaohe Dai

doi:10.1016/j.jmps.2025.106163

将刚性球体与膜分离的通用拉离力

A pull-off force Fc is required to separate two objects in adhesive contact. For a rigid sphere on an elastic slab, the classic Johnson–Kendall–Roberts (JKR) theory predicts Fc = 3/2πγR_s, where γ represents the interface adhesion or toughness and R_s is the radius of the sphere. Here, we investigate an alternative, extreme scenario: the pull-off force required to detach a rigid, frictionless sphere from a thin membrane, a scenario observed in a wide range of nature and engineering systems, such as nanoparticles on cell membranes, atomic force microscopy probes on atomically thin 2D material sheets, and electronic devices on flexible films. We show that, within the JKR framework, the pull-off forces in axisymmetric soap films, linearly elastic membranes, and nonlinear hyperelastic membranes are all given by Fc = πγR_s. This result is remarkable as it indicates that the pull-off force for membranes is independent of the material’s constitutive law, size, pretension, and solid surface tension.

要将两个处于粘性接触的物体分开，需要一个拉脱力 Fc。对于刚性球体与弹性平板之间的接触，经典的约翰逊 - 肯德尔 - 罗伯茨（JKR）理论预测 Fc = 3/2πγR_s，其中γ表示界面的粘附力或韧性，R_s 是球体的半径。在此，我们研究另一种极端情况：将一个刚性、无摩擦的球体从薄膜上拉脱所需的拉脱力，这种情况在自然界和工程系统中广泛存在，例如细胞膜上的纳米颗粒、原子力显微镜探针在原子级薄的二维材料片上，以及柔性薄膜上的电子器件。我们表明，在 JKR 框架内，轴对称肥皂膜、线性弹性膜和非线性超弹性膜的拉脱力均由 Fc = πγR_s 给出。这一结果令人瞩目，因为它表明膜的拉脱力与材料的本构定律、尺寸、预张力和固体表面张力无关。

From bending to stretching driven peeling of heterogeneous adhesives

Laurent Ponson

doi:10.1016/j.jmps.2025.106165

从弯曲到拉伸驱动非均质胶粘剂的剥离

We study theoretically the peeling behavior of adhesives. Adopting a fracture mechanics approach, we derive the equation of motion of the adhesion front propagating at the interface between the adhesive and the substrate from which the peel strength is inferred. The originality of our approach lies in the description of the interplay during peeling between the stretching and the bending modes of deformation of the adhesive that is described as a Föppl-Von Karman’s thin film. Considering first a straight adhesion front, we retrieve the most salient feature of homogeneous adhesives, namely a peeling angle dependent peel strength driven by bending at large angles and by stretching at low angles. We also derive the shape of the adhesive that can be described using a single bending length scale derived from our model. We then investigate the impact of adhesion heterogeneities. We evidence that the deformations of the adhesion front are governed by a non-local interface elasticity the strength of which decreases with the peeling angle. This phenomenon reflects the transition between a stretching dominated peeling at low angle to a bending driven peeling at large angles that is captured in our model. This transition impacts the stability of adhesive fronts that relaxe more slowly from perturbations and gives rise to a stronger toughening effect in presence of a disorder distribution of adhesion energy at low peeling angles. Overall, this study sheds light on the central role played the elastic deformations of adhesives on their peeling behavior. The proposed framework unfolds the complex interplay between the deformation of adhesives and the peeling driving force that may be leveraged to engineer heterogeneous adhesives with enhanced properties. It also provides rich insights on the mechanisms underlying the emergence of non-local elasticity in interface problems.

从理论上研究了胶粘剂的剥离行为。采用断裂力学的方法，推导了在胶粘剂与基材界面处传播的粘接锋的运动方程，并由此推断剥离强度。我们方法的独创性在于描述了在剥离过程中拉伸和弯曲变形模式之间的相互作用，这种模式被描述为Föppl-Von卡门薄膜。首先考虑直粘合面，我们检索了均匀粘合剂的最显著特征，即剥离角度依赖于剥离强度，剥离强度由大角度弯曲和低角度拉伸驱动。我们还推导出胶粘剂的形状，可以使用从我们的模型导出的单一弯曲长度尺度来描述。然后我们研究了粘附异质性的影响。结果表明，粘附面变形受非局部界面弹性控制，其强度随剥离角度的增大而减小。这种现象反映了在我们的模型中捕获的低角度拉伸主导剥离到大角度弯曲驱动剥离之间的过渡。这种转变影响了粘接前沿的稳定性，使其从扰动中松弛得更慢，并且在低剥离角度下粘接能量的无序分布会产生更强的增韧效果。总的来说，本研究揭示了胶粘剂弹性变形对其剥离行为的核心作用。提出的框架揭示了胶粘剂变形和剥离驱动力之间复杂的相互作用，可以利用这种相互作用来设计具有增强性能的异质胶粘剂。它还为界面问题中非局部弹性产生的机制提供了丰富的见解。

Mechanics of Materials

Effects of crease angles and defects on membrane tensile behavior

Qian Zhang, Qiuyue Zhong, Hui Qiu, Shuo Wang, Jian Feng, Jianguo Cai

doi:10.1016/j.mechmat.2025.105365

折痕角和缺陷对薄膜拉伸性能的影响

In this study, the mechanical behavior of creased membrane structures under uniaxial tensile tests is investigated after deployment, focusing on the effects of crease formation, crease angles, and induced defects. The results show that crease introduction reduces the fracture strain, although the fracture strength of creased and uncreased membranes remains similar. Moreover, the local elastic modulus of the creased region along the unfolding direction is found to be 69.5% of that of an ideal pure membrane based on the determination of crease influence width. The analysis of crease angle reveals that both fracture strength and strain increase with crease angle. For membranes with a 90°crease, the fracture strength is about 10.9% higher than that of the membrane with a horizontal crease. The elastic modulus in the direction of crease extension and shear modulus can be determined and verified through mechanical testing and finite element analysis of the angled creased membranes, forming an orthotropic elastic parameter model for the creased region. Finally, the introduction of circular holes of various sizes as geometric defects significantly affects wrinkle distribution and out-of-plane deformation, while notably reducing fracture strain and fracture stress, with the impact on fracture strain being particularly pronounced. This study offers crucial insights into the design of creased membranes, particularly for aerospace and space exploration, where performance under complex loading and defects is critical.

在这项研究中，折痕膜结构在展开后的单轴拉伸试验下的力学行为进行了研究，重点研究了折痕形成、折痕角度和诱导缺陷的影响。结果表明，褶皱的引入降低了断裂应变，但褶皱膜和未褶皱膜的断裂强度基本相同。此外，在确定折痕影响宽度的基础上，折痕区沿展开方向的局部弹性模量为理想纯膜的69.5%。对折痕角的分析表明，随着折痕角的增加，断裂强度和应变均增加。对于具有90°折痕的膜，其断裂强度比具有水平折痕的膜高10.9%左右。通过对有角度折痕膜的力学试验和有限元分析，可以确定并验证折痕延伸方向的弹性模量和剪切模量，形成折痕区域的正交各向异性弹性参数模型。最后，引入不同尺寸的圆孔作为几何缺陷，显著影响褶皱分布和面外变形，同时显著降低断裂应变和断裂应力，其中对断裂应变的影响尤为显著。这项研究为折痕膜的设计提供了重要的见解，特别是在航空航天和太空探索领域，在复杂载荷和缺陷下的性能至关重要。

International Journal of Plasticity

Promising pathways for balancing strength and ductility in chemically complex alloys with medium-to-high stacking fault energies

Shanshan Liu, Tongtong Sun, Zongde Kou, Xiaoliang Han, Qingwei Gao, Jiyao Zhang, Xiaoming Liu, Laichang Zhang, Jiri Orava, Kaikai Song, Lijun Xiao, Jürgen Eckert, Weidong Song

doi:10.1016/j.ijplas.2025.104358

具有中高层错能的化学复杂合金中平衡强度和延性的有希望的途径

Emerging chemically complex alloys (CCAs) with medium-to-high stacking fault energies (SFEs) offer significant potential as advanced materials, yet achieving the balance between strength and ductility remains challenging. This study explores the strategic control of partial recrystallization in Al8.3Co16.7Cr13.3Fe16.7Ni41.7V3.3 CCAs to engineer micron-scale heterogeneous structures featuring unevenly distributed L12 nanoprecipitates. The optimized microstructure comprises finely recrystallized regions with high-angle grain boundaries (HAGBs), coarsely unrecrystallized regions with low-angle grain boundaries (LAGBs), and deformation-defect-rich transition (DDRT) zones where both grain boundary types coexist. This architecture enables synergistic strengthening mechanisms, including grain boundary strengthening, precipitation strengthening, dislocation strengthening, and hetero-deformation-induced (HDI) strengthening, resulting in an exceptional yield strength of up to 1623 MPa. During plastic deformation, the dislocation pile-up and accumulation aided by interactions with nanoprecipitates and GBs balance strain softening caused by shear band propagation, leading to relatively low but steady work-hardening rates (WHRs). As deformation progresses, increasingly complex interactions further promote the formation of pronounced dislocation pile-ups, multiplication, SFs, L-C lock networks, and the 9R phase transformation within DDRT zones, collectively contributing to continuous WHRs. As a result of these synergistic mechanisms, the material achieves an ultimate tensile strength of ∼1700 MPa and a total elongation of ∼17.2%, demonstrating enhanced ductility without sacrificing strength. This work highlights the potential of localized DDRT zones to enable controlled phase transformations in CCAs with medium-to-high SFEs, providing a promising pathway for designing high-performance materials.

新兴的具有中高层错能（sfe）的化学复杂合金（CCAs）为先进材料提供了巨大的潜力，但实现强度和延性之间的平衡仍然具有挑战性。本研究探讨了Al8.3Co16.7Cr13.3Fe16.7Ni41.7V3.3 CCAs中部分再结晶的策略控制，以设计具有不均匀分布L12纳米沉淀物的微米级非均相结构。优化后的显微组织包括具有高角度晶界的精细再结晶区（HAGBs）、具有低角度晶界的粗未再结晶区（LAGBs）以及两种晶界类型共存的富含变形缺陷的过渡区（DDRT）。这种结构可以实现协同强化机制，包括晶界强化、沉淀强化、位错强化和异质变形诱导（HDI）强化，从而产生高达1623 MPa的特殊屈服强度。在塑性变形过程中，位错的堆积和积累与纳米沉淀和gb的相互作用平衡了剪切带扩展引起的应变软化，导致相对较低但稳定的加工硬化速率（whr）。随着变形的进行，越来越复杂的相互作用进一步促进了DDRT区域内明显的位错堆积、倍增、SFs、L-C锁网和9R相变的形成，共同促成了连续的whr。由于这些协同机制，该材料的极限抗拉强度达到~ 1700 MPa，总伸长率达到~ 17.2%，在不牺牲强度的情况下表现出增强的延展性。这项工作强调了局部DDRT区域的潜力，可以在具有中高sfe的cca中实现可控相变，为设计高性能材料提供了一条有前途的途径。

Thin-Walled Structures

Quasi-isotropy in non-periodic metastructures and topological solution for directional freedom

Genda Wang, Peng Jiao, Jiabao Bai, Zhiping Chen

doi:10.1016/j.tws.2025.113396

非周期元结构中的准各向同性和方向自由的拓扑解

Traditional periodic designs are susceptible to catastrophic failure under external loads, with optimal performance limited to specific directions and poor performance in others. In complex modern operational environments, metastructures with stable and isotropic responses are increasingly critical. This study integrates non-periodic tiling rules into structural design to enhance structural stability and achieve direction-independent mechanical properties. As a proof of concept, the performance of non-periodic metastructures (NSF, NDK, NST) is investigated experimentally and numerically, with comparisons to the periodic structure (PS). The results demonstrate that non-periodic metastructures maintain stable load-bearing capacity under high strain. Specifically, while PS experience a 87 % reduction in stress during compression, non-periodic metastructures exhibit a reduction of less than 25 %. Furthermore, non-periodic metastructures display quasi-isotropic behaviour, with mechanisms such as multi-path stress dissipation, dynamic adaptability, and macro-averaging effect revealed through validated numerical models. The anisotropy factor (P) of non-periodic metastructures remains below 0.4 across various mechanical properties, significantly lower than that of PS. To achieve near-perfect isotropy, a flexible performance compensation strategy based on the peak-shaving and valley-filling principle is proposed, reducing P to below 0.1. This work presents an innovative design paradigm for multifunctional structures, offering novel perspectives on structural optimization and application.

传统的周期性设计在外载荷作用下容易发生灾难性失效，其最佳性能仅限于特定方向，而在其他方向则表现不佳。在复杂的现代作战环境中，具有稳定和各向同性响应的元结构变得越来越重要。本研究将非周期性的平铺规则整合到结构设计中，以增强结构稳定性，实现与方向无关的力学性能。为了证明这一概念，对非周期元结构（NSF， NDK， NST）的性能进行了实验和数值研究，并与周期结构（PS）进行了比较。结果表明，非周期性元结构在高应变下保持稳定的承载能力。具体来说，虽然PS在压缩过程中应力降低了87%，但非周期性元结构的应力降低幅度不到25%。此外，非周期元结构表现出准各向同性行为，通过验证的数值模型揭示了多径应力耗散、动态适应性和宏观平均效应等机制。非周期性元结构的各向异性因子(P)在各种力学性能上均低于0.4，显著低于PS。为了实现近乎完美的各向异性，提出了一种基于削峰填谷原理的柔性性能补偿策略，将P降至0.1以下。本研究提出了一种创新的多功能结构设计范式，为结构优化和应用提供了新的视角。

来源：复合材料力学仿真Composites FEM

【新文速递】2025年4月14日固体力学SCI期刊最新文章

今日更新：International Journal of Solids and Structures 4 篇，Journal of the Mechanics and Physics of Solids 1 篇，Mechanics of Materials 1 篇International Journal of Solids and StructuresNumerical study on crack tip fields in liquid crystal elastomersQiang Guo, Rong Long, Shengqiang Caidoi:10.1016/j.ijsolstr.2025.113389液晶弹性体裂纹尖端场的数值研究This study presents a numerical investigation into the crack tip fields in liquid crystal elastomers (LCEs) using finite element simulations. LCEs exhibit unique mechanical behaviors, such as soft elasticity and directionally adjustable anisotropy, due to the coupling between the deformation of polymer networks and the rotation of liquid crystal mesogens. The numerical simulations focus on a rectangular LCE plate with a small central crack, subjected to uniform stretching. Simulation results reveal the presence of a uniaxial stress state near the crack tip and a universal stress singularity obeying a power law with an exponent of −1. Along the circumferential direction around the crack tip, the stress distribution exhibits a prominent polarization, with the polarization direction precisely aligned with the initial mesogen orientation. For the mesogen reorientation at the crack tip, two types of mesogen rotation—rigid body rotation with the polymer network and relative rotation due to network stretching—are distinguished. The rigid body rotation is found to cause significant heterogeneity in mesogen orientation at the crack tip, but the relative rotation tends to make the mesogen orientation more uniform, generally aligning with the direction of applied stretch. The final mesogen orientation, determined by the initial orientation and rotation, is closely related to the magnitude of the stress field at the crack tip. These findings provide valuable insights into the fracture behavior of LCEs and can serve as a foundation for future experimental and theoretical studies.本文采用有限元方法对液晶弹性体裂纹尖端场进行了数值模拟研究。由于聚合物网络的变形和液晶介元的旋转之间的耦合，LCEs表现出独特的力学行为，如软弹性和方向可调的各向异性。数值模拟的重点是一个具有小中心裂纹的矩形LCE板，受到均匀拉伸。模拟结果表明，裂纹尖端附近存在单轴应力状态，应力奇异服从指数为- 1的幂律。沿裂纹尖端周围的周向，应力分布呈现出明显的极化，极化方向与初始细观取向精确对齐。对于裂纹尖端的介观重定向，区分了两种类型的介观旋转——聚合物网络的刚体旋转和网络拉伸引起的相对旋转。研究发现，刚体旋转会导致裂纹尖端细观取向的显著不均匀性，但相对旋转会使细观取向更加均匀，通常与施加拉伸的方向一致。最终的细观取向由初始取向和旋转决定，与裂纹尖端应力场的大小密切相关。这些发现为LCEs的断裂行为提供了有价值的见解，可以为未来的实验和理论研究奠定基础。Analytical solution for adhesive contact of magneto-electro-elastic composites under an axisymmetric power-law indenter: A Maugis–Dugdale frameworkQing-Hui Luo, Yue-Ting Zhoudoi:10.1016/j.ijsolstr.2025.113391轴对称幂律压头下磁-电弹性复合材料粘接接触的解析解：一个Maugis-Dugdale框架Switchable adhesion in response to external stimuli plays a critical role in various applications such as transfer printing, climbing robots and soft gripper. Multiferroic composites can give specific responses to mechanical-electro-magnetic loadings due to their multi-field coupling effects, which offer new routines to achieve tunable adhesion. In this work, the classical Maugis-Dugdale (M−D) adhesion model is extended to address the axisymmetric adhesive contact problem between a multiferroic composite half-space and an axisymmetric power-law indenter with real shape index n. By virtue of the superposition principle and Griffith energy balance, analytical solutions of the physical quantities at the contact surface and the relationships among the indentation force, contact radius and indentation depth for M−D-n model are obtained. The Derjaguin–Muller–Toporov (DMT)-n solutions applicable to multiferroic composites are derived from the corresponding M−D-n solutions as the limiting cases, which are new to literature and acquired in this work for the first time. The effects of the electromagnetic properties and profile of the indenter on adhesion behaviors are discussed. It is found that the electromagnetic properties of the indenter have hardly influence on adhesion behaviors in the absence of electromagnetic loadings, which means that one can replace the multi-field coupling adhesion solutions with the purely elastic adhesion solutions in nanoindentation characterization of multiferroic composites under this circumstance. The profile of the indenter has a prominent effect on the transition behavior from DMT-n solution to JKR-n solution. The adhesion enhancing effect induced by the electromagnetic loadings diminishes with increasing the shape index of the indenter and the magnitude of the generalized Tabor parameter. The results obtained from this work not only lay the theoretical basis for nanoindentation technique in characterizing material properties of multiferroic composites, but also possess potential application value in switchable adhesion.响应外部刺激的可切换粘附在各种应用中起着至关重要的作用，例如转移印刷，攀爬机器人和软抓取器。多铁复合材料由于其多场耦合效应，可以对机械-电磁载荷做出特定的响应，这为实现可调粘附提供了新的途径。本文将经典的Maugis-Dugdale （M−D）粘接模型扩展到多铁复合材料半空间与实形状指数n的轴对称幂律压头之间的轴对称粘接接触问题。利用叠加原理和Griffith能量平衡，得到了M−D-n模型的接触面物理量以及压痕力、接触半径和压痕深度之间的关系的解析解。以M−D-n解为极限情况，导出了适用于多铁复合材料的Derjaguin-Muller-Toporov (DMT)-n解，这是文献中首次获得的新解。讨论了压头的电磁特性和形状对粘接性能的影响。研究发现，在没有电磁载荷的情况下，压头的电磁特性对黏附行为几乎没有影响，这意味着在这种情况下，多铁复合材料的纳米压痕表征可以用纯弹性黏附溶液代替多场耦合黏附溶液。压头的形状对DMT-n溶液到JKR-n溶液的过渡行为有显著影响。随着压头形状指数的增大和广义Tabor参数的增大，电磁载荷对压头黏附力的增强作用逐渐减弱。本研究结果不仅为纳米压痕技术表征多铁复合材料的材料性能奠定了理论基础，而且在可切换粘附方面具有潜在的应用价值。Angle-dependent peeling behavior of compliant nanofilms on planar substratesXuebo Yuandoi:10.1016/j.ijsolstr.2025.113380平面基底上柔顺纳米膜的角度依赖性剥离行为The peeling of compliant nanofilms from supporting substrates is essential in mechanical exfoliation techniques, biomimetic adhesives, and nanoelectromechanical systems. Prior to the steady state, the peeling force typically increases in the initial stage and then decreases nonlinearly in the transition stage. However, existing mechanics models rarely capture the effects of the film’s tensile stiffness and peeling angle on these two stages, particularly the initial peeling stiffness and peak peeling force. Though extending a recent model (Yuan et al., 2024) by accurately incorporating the film’s in-plane deformation and arbitrary peeling angle, this work establishes a comprehensive large-deformation model using the energy-variational method. The proposed model effectively predicts the entire peeling process across different peeling angles and is validated by molecular dynamics simulations. For relatively large peeling angle, the film’s tensile stiffness exhibits minor effect on the peeling behavior. The influences of the peeling angle on the peeling process, peeling stiffness, and peak peeling force are analyzed in detail. Through dimensional analysis, an explicit scaling relation for the peak peeling force is derived, accounting for system parameters such as peeling angle, film stiffness, structural parameters, and interfacial properties. This work provides a comprehensive model for the peeling behavior of nanofilm-substrate systems, offering new insights into the atomic-scale interface mechanics of two-dimensional materials.从支撑基板上剥离柔顺的纳米膜在机械剥离技术、仿生粘合剂和纳米机电系统中是必不可少的。在稳定状态之前，剥落力通常在初始阶段增大，然后在过渡阶段非线性减小。然而，现有的力学模型很少能捕捉到薄膜的拉伸刚度和剥离角度对这两个阶段的影响，特别是初始剥离刚度和峰值剥离力。本文通过对Yuan等人（2024）的最新模型进行扩展，将薄膜的面内变形和任意剥离角度精确地纳入其中，利用能量变分方法建立了一个综合的大变形模型。该模型有效地预测了不同剥离角度下的整个剥离过程，并通过分子动力学模拟进行了验证。当剥离角度较大时，薄膜的拉伸刚度对剥离行为影响较小。详细分析了剥离角度对剥离过程、剥离刚度和剥离峰值力的影响。通过量纲分析，导出了考虑剥离角度、膜层刚度、结构参数和界面性能等系统参数的峰值剥离力的显式标度关系。这项工作为纳米膜-衬底系统的剥离行为提供了一个全面的模型，为二维材料的原子尺度界面力学提供了新的见解。Optimization and experimental validation of anti-tri chiral lattice metamaterial for broadband vibration suppressionVahid Tikani, Saeed Ziaei-Raddoi:10.1016/j.ijsolstr.2025.113384反三手性晶格超材料宽带振动抑制的优化与实验验证A key challenge in metamaterials design is to optimize the anti-tri chiral structure with precise and controllable geometry, considering performance criteria. This work proposes a parametric anti-tri-chiral lattice made from Polylactic acid (PLA) polymer to open the wide bandgap for vibration suppression. Experiments and theoretical methods study anti-tri-chiral lattice to analyze the vibration attenuation features of the metamaterial. The band structure was studied in terms of the geometry parameters of the unit cell to investigate the effect of geometry changes on the bandgap size. To ensure the best geometry of the anti-tri-chiral unit cell, an automated optimization process is conducted using MATLAB and COMSOL Multiphysics based on Non-dominated Sorting Genetic Algorithm II (NSGA-II). Two optimization cases were performed with different objectives, and the results indicated that the optimized geometry yields enhanced vibration suppression capabilities and a wide complete bandgap. Finally, the anti-tri-chiral lattice is fabricated using Fused Deposition Molding (FDM), and experimental testing is performed to validate the proposed design.在考虑性能标准的前提下，优化具有精确和可控几何形状的反三手性结构是超材料设计的一个关键挑战。本文提出了一种由聚乳酸（PLA）聚合物制成的参数化反三手性晶格，以打开宽带隙来抑制振动。实验和理论方法研究了反三手性晶格，分析了超材料的减振特性。从单晶胞的几何参数角度研究了带隙结构，探讨了几何结构变化对带隙大小的影响。为了确保反三手性单元胞的最佳几何形状，基于非支配排序遗传算法II (NSGA-II)，利用MATLAB和COMSOL Multiphysics进行了自动化优化过程。采用不同的优化目标进行了两种优化情况，结果表明，优化后的几何结构具有更强的振动抑制能力和更宽的全带隙。最后，采用熔融沉积成型（FDM）技术制备了反三手性晶格，并进行了实验测试以验证所提出的设计。Journal of the Mechanics and Physics of SolidsConstruction of Isotropic Compressible Hyperelastic Constitutive Models Based Solely on Uniaxial TestsPengfei Yang, Peidong Lei, Bin Liu, Huajian Gaodoi:10.1016/j.jmps.2025.106150基于单轴试验的各向同性可压缩超弹性本构模型构建Constructing constitutive models for compressible soft materials is essential for accurately describing their highly nonlinear, large deformation mechanical behavior and volumetric deformation. However, most existing constitutive models rely on predefined assumptions about the form of the strain energy function. Constructing compressible hyperelastic constitutive models is particularly challenging because, beyond the uniaxial test, it typically requires additional more sophisticated and more costly experiments, such as biaxial, pure shear, and hydrostatic tests. In this paper, we propose an approach to constructing an isotropic compressible hyperelastic constitutive model without assuming a predefined form of the strain energy function. Instead, we derive the strain energy function directly from experimental data. Our method requires only uniaxial tests, significantly simplifying the experimental requirements and costs. This approach is achieved by utilizing the deviatoric-volumetric decomposition of the strain energy function coupled with an interpolation scheme. To validate our proposed approach, we compare our model against traditional compressible constitutive models and well-known experimental data on incompressible rubbers. Additionally, we perform experiments on compressible rubbers, including foamed silicone and foamed EPDM (ethylene propylene diene monomer), for further validation. It is found that our model perfectly predicts the uniaxial test data and accurately predicts mechanical behavior under various other loading conditions. Finally, we discuss strategies for enhancing model accuracy and its ability to decouple uniaxial behavior from compressibility. This decoupling feature is crucial for accurately capturing the distinct mechanical responses associated with different deformation modes, thereby improving the predictive capability of the constitutive model.建立可压缩软质材料的本构模型是准确描述其高度非线性、大变形力学行为和体积变形的关键。然而，大多数现有的本构模型依赖于关于应变能函数形式的预定义假设。构建可压缩超弹性本构模型尤其具有挑战性，因为除了单轴测试之外，它通常还需要额外的更复杂和更昂贵的实验，如双轴、纯剪切和静水试验。在本文中，我们提出了一种构造各向同性可压缩超弹性本构模型的方法，而不需要假设应变能函数的预定义形式。相反，我们直接从实验数据推导出应变能函数。我们的方法只需要单轴测试，大大简化了实验要求和成本。该方法是利用应变能函数的偏差体积分解与插值方案相结合来实现的。为了验证我们提出的方法，我们将我们的模型与传统的可压缩本构模型和众所周知的不可压缩橡胶的实验数据进行了比较。此外，我们还对可压缩橡胶进行了实验，包括发泡硅胶和发泡EPDM（乙丙二烯单体），以进一步验证。结果表明，该模型能较好地预测单轴试验数据，并能较准确地预测各种载荷条件下的力学行为。最后，我们讨论了提高模型精度及其将单轴行为与可压缩性解耦的能力的策略。这种解耦特性对于准确捕捉与不同变形模式相关的不同力学响应至关重要，从而提高本构模型的预测能力。Mechanics of MaterialsOn modeling fracture of soft polymersAditya Konale, Vikas Srivastavadoi:10.1016/j.mechmat.2025.105346软聚合物断裂建模研究Soft polymers are ubiquitous materials in nature and as engineering materials with properties varying from rate-independent to rate-dependent. Current fracture toughness measures are non-unique for rate-dependent soft materials for varying loading profiles and specimen geometries. Works on modeling fracture in rate-dependent soft polymers are limited to specific pre-cracked geometries. There is no generally agreed-upon model for the fracture of soft polymers. We propose and show that a critical value of stress work can be used as a measure of fracture resistance in soft polymers. We develop a damage model to predict fracture in soft polymers. In the model, the energetic part of the critical stress work is proposed as a damage initiation criterion that has the ability to capture failure surfaces. The damage growth is modeled through a generalized gradient-damage framework. The fracture model is validated for both elastomers and viscous soft polymers by comparing model predictions against experimental results for different materials (ethylene propylene diene monomer - EPDM, EPS25 vitrimer, styrene butadiene rubber - SBR, and polyborosiloxane - PBS), a variety of specimen geometries, and loading conditions. The model can predict key physical phenomena such as brittle and ductile responses and different fracture profiles. The microstructural quantities, such as subchain dissociation energy during the fracture of polymers, can be predicted from the macroscopic model parameters.软聚合物是自然界中普遍存在的材料，也是具有从速率无关到速率相关特性的工程材料。目前的断裂韧性测量对于速率相关的软材料来说，对于不同的加载剖面和试样几何形状来说，并不是唯一的。对速率相关软聚合物的断裂建模工作仅限于特定的预裂几何形状。对于软聚合物的断裂，目前还没有一个公认的模型。我们提出并证明了应力功的临界值可以作为软聚合物抗断裂性的衡量标准。我们开发了一个损伤模型来预测软聚合物的断裂。在该模型中，临界应力功的能量部分被提出作为一种能够捕捉破坏面的损伤起裂判据。采用广义梯度损伤框架对损伤增长进行建模。通过将模型预测结果与不同材料（乙丙二烯单体EPDM、EPS25玻璃体、丁苯橡胶SBR和聚硼硅氧烷PBS）、各种试样几何形状和加载条件下的实验结果进行比较，验证了弹性体和粘性软聚合物的断裂模型。该模型可以预测脆性和韧性响应以及不同的断裂剖面等关键物理现象。从宏观模型参数可以预测聚合物断裂时的亚链解离能等微观结构量。来源：复合材料力学仿真Composites FEM