【新文速递】2025年10月8日固体力学SCI期刊最新文章

今日更新：International Journal of Solids and Structures 2 篇，Journal of the Mechanics and Physics of Solids 1 篇，Mechanics of Materials 1 篇，International Journal of Plasticity 1 篇，Thin-Walled Structures 6 篇International Journal of Solids and StructuresAn ana lytical model for power law impression creepRaheeg Ragab, Wei Sundoi:10.1016/j.ijsolstr.2025.113692幂律印象蠕变的分析模型Impression Creep Test (ICT) employing a rectangular indenter is a novel miniaturized creep testing technique popularly used to characterize the secondary creep properties of materials. The test holds numerous advantages, including less deformation constraint compared to the conventional ICT systems with circular indenters, the requirement for s mall amounts of materials for sampling compared to conventional uniaxial creep tests, and the capability to perform several stepped tests on the same specimen. Nonetheless, data interpretation from such tests remains a key challenge due to the requirement to perform extensive FE an alyses to correlate the measured impression creep response to the uniaxial creep behaviour. To alleviate this challenge, the present work established, for the first time, a mechanistic-based theoretical framework to represent impression creep deformation behaviour and convert ICT data into equivalent uniaxial creep properties using closed-form an alytical solutions. The model was formulated based on the expanding cavity theory for power-law creep solids and following the principles of energy conservation for a semi-infinite medium, which can be applied to a finite medium via a correction function for practical impression specimen geometry. The model was calibrated and validated through numerical an alysis and experimental data obtained from actual impression creep tests at high temperatures. Our model reasonably captured the global deformation behaviour and produced uniaxial creep parameters closely matching those obtained from standard uniaxial creep tests, indicating that it can be applied to conveniently extract the uniaxial power-law creep parameters for a given material from the experimentally measured impression creep response. The proposed an alytical approach also supports ICT standardization and enhances the design of efficient testing programs.采用矩形压头的压痕蠕变试验是一种新型的小型化蠕变试验技术，广泛用于表征材料的二次蠕变特性。该测试具有许多优点，包括与具有圆形压头的传统ICT系统相比，变形约束较小，与传统的单轴蠕变测试相比，对取样材料的要求较少，并且能够在同一试样上进行多次阶梯测试。尽管如此，由于需要进行广泛的有限元分析，以将测量的压痕蠕变响应与单轴蠕变行为相关联，因此从此类测试中获得的数据解释仍然是一个关键挑战。为了缓解这一挑战，本研究首次建立了一个基于力学的理论框架，以表示印模蠕变变形行为，并使用封闭形式的解析解将ICT数据转换为等效的单轴蠕变特性。该模型基于幂律蠕变固体的膨胀腔理论，遵循半无限介质的能量守恒原理，通过对实际压痕试样几何形状的修正函数，可以应用于有限介质。通过数值分析和实际高温压痕蠕变试验数据对模型进行了标定和验证。该模型合理地捕捉了材料的整体变形行为，得到的单轴蠕变参数与标准单轴蠕变试验结果非常接近，表明该模型可以方便地从实验测量的压痕蠕变响应中提取给定材料的单轴幂律蠕变参数。提出的分析方法还支持信息通信技术标准化，并加强有效测试计划的设计。Indentation response of a finite-sized three-dimensional layered cylinderLizichen Chen, C.W. Lim, Weiqiu Chendoi:10.1016/j.ijsolstr.2025.113695有限尺寸三维层状圆柱的压痕响应This article studies the indentation response of a layered cylinder by establishing a three-dimensional (3D) symplectic framework for contact ana lysis. The Hamiltonian transformation of 3D layered structures for different scenarios has been developed and proven. The Saint-Venant solutions are obtained through a semi-inverse method, and the eigen-solutions for general eigenvalues are constructed in the Papkovich-Neuber form. These general eigen-solutions can also be derived via a sub-symplectic structure representation, which makes the model to be applicable to the cases with multi-field couplings. A strategy for determining the contact region is proposed by mapping the symplectic expansion into a specialized form via the Cantor pairing diagram. The ana lytical solutions are validated through comparison with finite element. The theoretical formulation and modeling offer an effective guidance for material characterizations of the cylinder.本文通过建立三维接触分析辛框架，研究了层状圆柱的压痕响应。开发并验证了不同场景下三维层状结构的哈密顿变换。利用半逆方法得到了Saint-Venant解，并以Papkovich-Neuber形式构造了一般特征值的特征解。这些一般的本征解也可以通过子辛结构表示得到，这使得该模型适用于多场耦合的情况。提出了一种确定接触区域的策略，即通过康托配对图将辛展开映射为特定形式。通过与有限元的比较，验证了解析解的正确性。理论公式和模型为圆柱的材料表征提供了有效的指导。Journal of the Mechanics and Physics of SolidsMetal Rupture from Near-Field Underwater Explosive Bubble Jetting at High Hydrostatic PressureMichael Galuska, Carlos Javier, Michael Papa, James LeBlanc, Helio Matos, Arun Shukladoi:10.1016/j.jmps.2025.106390高静水压力下近场水下爆炸气泡喷射导致金属破裂The interaction between a gas bubble resulting from an underwater explosion event and a nearby structure under high hydrostatic pressure has been explored experimentally and computationally to assess the damage potential of such events on submerged structures. This study ana lyzed two flat plates with differing material properties: a relatively rigid steel plate and a more compliant thin aluminum plate, under varying explosive standoff distances and hydrostatic pressures. Standoff distances were selected relative to the explosive bubble’s maximum radius at the specified hydrostatic pressure to standardize interaction dynamics. High-speed photography was utilized to capture the interaction between the bubble and plate specimens and document the ensuing structural deformation for subsequent ana lysis using three-dimensional digital image correlation techniques. Computational simulations were conducted using the fully coupled Eulerian-Lagrangian fluid-structure interaction code, DYS MAS, which was pivotal in complementing the experimental findings. These simulations predicted the complex jetting dynamics of the bubble, including its shape, migration, and jetting behavior, as well as quantifying the resultant deformation and damage to the studied structures. The results reveal that variables such as the explosive standoff distance, plate rigidity, and hydrostatic pressure critically influence the bubble’s behavior, and the extent of damage inflicted on the nearby structure. Specifically, the study underscores the explosive bubble’s collapse and the accompanying jetting phenomena as primary contributors to the observed structural damage, including rupture, under the examined parameters. This study offers a deeper understanding of the mechanis ms driving damage in submerged structures subjected to near-field UNDEX events.通过实验和计算研究了水下爆炸事件产生的气泡与附近结构物在高静水压力下的相互作用，以评估爆炸事件对水下结构物的损伤潜力。本研究分析了两种具有不同材料特性的平板：在不同的爆炸距离和静水压力下，相对刚性的钢板和更柔顺的薄铝板。在规定的静水压力下，选取相对于爆炸泡最大半径的间隔距离，以标准化相互作用动力学。高速摄影被用来捕捉气泡和板试样之间的相互作用，并记录随后的结构变形，以便随后使用三维数字图像相关技术进行分析。利用欧拉-拉格朗日流固相互作用完全耦合程序DYS MAS进行了计算模拟，这是补充实验结果的关键。这些模拟预测了气泡的复杂喷射动力学，包括其形状、迁移和喷射行为，并量化了所研究结构的变形和损伤。结果表明，爆炸距离、板刚度和静水压力等变量对气泡的行为和对附近结构的破坏程度有重要影响。具体来说，该研究强调了爆炸气泡的破裂和伴随的喷射现象是在检测参数下观察到的结构损伤（包括破裂）的主要原因。该研究为水下结构在近场UNDEX事件下的损伤机制提供了更深入的理解。Mechanics of MaterialsEffect of Microdamage on the Failure of Open-Hole UD GFRP Laminates: A Combined Experimental and Numerical StudyÖzgün Şener, Altan Kayrandoi:10.1016/j.mechmat.2025.105524微损伤对开孔UD玻璃钢层合板破坏的影响：实验与数值结合研究The effect of microdamaging on the failure of unidirectional Interglas 92145/CR80 GFRP laminates is studied through experiments and a numerical approach combining Enhanced Schapery Theory (EST) and Crack Band Theory (CBT). Open-hole tension tests with various layer configurations, along with flat tensile tests were conducted to examine failure modes and their progression. The initiation and development of failure mechanis ms were tracked experimentally using DIC imaging. In the numerical model, the matrix microdamage is represented through dissipated energy-dependent functions derived from standardized mechanical tests. Without discretely modeling splitting cracks, the numerical approach captured narrow zones of fiber and matrix failure coincident with experimentally observed crack paths. Axial, transverse, and shear strain fields from the physical and virtual tests were compared at the critical stages of the testing regimen. Comparison of the strain fields, as well as stress-strain curves from the numerical and experimental studies showed good agreement, suggesting that incorporation of microdamage modeling—rarely implemented in progressive failure an alyses—offers potential for improving failure predictions in GFRP laminates.结合增强Schapery理论（EST）和裂纹带理论（CBT），通过实验和数值方法研究了微损伤对单向interglass 92145/CR80玻璃钢层合板失效的影响。进行了各种层构型的裸眼拉伸试验，以及平面拉伸试验，以检查破坏模式及其进展。实验中使用DIC成像技术跟踪了失效机制的发生和发展。在数值模型中，通过标准化力学试验的耗散能量依赖函数来表示基体微损伤。数值方法没有对劈裂裂纹进行离散建模，而是捕获了与实验观察到的裂纹路径一致的纤维和基体的狭窄破坏区域。在试验方案的关键阶段，比较了物理和虚拟试验的轴向、横向和剪切应变场。应变场的比较，以及数值和实验研究的应力-应变曲线显示出良好的一致性，表明微损伤模型的结合-很少在渐进破坏分析中实施-提供了改进GFRP层合板的破坏预测的潜力。International Journal of PlasticityAchieving superior strength in high modulus Mg-Li matrix composites via rotary swaging with interfacial precipitation-induced strain compatibilityJiawei Sun, Yuchuan Huang, Yangyang Xu, Jiaxin Yu, Zhihong Ye, Youjie Guo, Fangzhou Qi, Gaoming Zhu, Jie Wang, Guohua Wu, Hezhou Liu, Wencai Liudoi:10.1016/j.ijplas.2025.104498 通过界面析出诱导应变相容性的旋转挤压，获得高模量Mg-Li基复合材料的优越强度The inherently low Young’s modulus and limited strength of Mg-Li alloys have long restricted their structural application potential. In this study, we developed a modulus-oriented TiB2/LAZ532 composite via rotary swaging, integrating particle reinforcement, severe plastic deformation, and interface engineering. Rotary swaging refined the grain structure to the submicron scale and introduced a high density of dislocation substructures, thereby enabling substantial strength improvement. Meanwhile, Li(Al, Zn) precipitates were observed to form at TiB2/matrix interfaces, as confirmed by TEM, phase-field simulations, FEA, and in-situ synchrotron XRD. These interfacial precipitates acted as middle layer reducing stress concentration and enhancing strain transfer across particle/matrix boundaries, thus achieving improved deformation compatibility. Owing to the dual contribution of matrix grain refinement/dislocation hardening and interfacial strain accommodation, the composite achieved an ultimate tensile strength of 455 MPa, Young’s modulus of 61 GPa, and a low density of 1.75 g/cm3. This unique combination of ultra-light weight and mechanical robustness highlights a functionally partitioned strengthening strategy, wherein reinforcement, processing, and interface design contribute complementary roles. The approach provides a generalizable pathway for designing next-generation lightweight Mg-Li structural materials.Mg-Li合金固有的低杨氏模量和有限强度长期制约着其结构应用潜力。在这项研究中，我们通过旋转模压，整合颗粒增强，剧烈塑性变形和界面工程，开发了面向模量的TiB2/LAZ532复合材料。旋转挤压将晶粒组织细化到亚微米级，并引入高密度的位错亚结构，从而大大提高了强度。同时，通过TEM、相场模拟、有限元分析和原位同步加速器XRD等手段证实，在TiB2/基体界面处有Li（Al, Zn）析出。这些界面析出物起到中间层的作用，降低了应力集中，增强了颗粒/基体边界上的应变传递，从而提高了变形相容性。由于基体晶粒细化/位错硬化和界面应变调节的双重作用，复合材料的极限抗拉强度为455 MPa，杨氏模量为61 GPa，低密度为1.75 g/cm3。这种独特的超轻重量和机械坚固性的结合突出了功能分区的强化策略，其中加固，处理和界面设计贡献互补的作用。该方法为下一代轻量化镁锂结构材料的设计提供了可推广的途径。Thin-Walled StructuresInteraction of multiple Mode-III cracks in an orthotropic plate with initial stressesDong-Liang Sun, Xu-Long Peng, Hai-Xin Liu, Xian-Fang Li, Zhao-Lei Zhang, Xue-Yang Zhangdoi:10.1016/j.tws.2025.114055正交各向异性板中多个iii型裂纹与初始应力的相互作用Initial stresses are a prevalent phenomenon in both aerospace engineering and pre-stressed structural applications. Available literature mainly focused on the influence of initial stress on Mode-I and Mode-II SIFs for multiple cracks or Mode-III SIFs for a single crack. This study presents a theoretical ana lysis of the interaction of multiple arbitrary Mode-III cracks embedded in an orthotropic elastic thin plate with initial stresses. The complex potential method and pseudo-traction method are adopted to solve the mixed boundary-value problem. Initially, a basic solution corresponding to a pair of anti-plane concentrated forces acting on an arbitrary location at a single crack for an orthotropic elastic medium under initial stresses is derived with the complex potential method. Then, with the derived solution, a system of Fredholm integral equations is formulated through the principle of superposition. At last, the influence of initial stresses, crack relative position, anisotropic ratio, and bedded plane angle on stress intensity factors of two arbitrary cracks in a pre-stressed orthotropic elastic thin plate is ana lyzed. Numerical results show that the initial stresses σ110 (parallel to the cracks) have little influence on the SIFs, but σ220 (vertical to the cracks) has the most significant effect for two collinear cracks, and KIII decreases with increases in initial stresses (σ110 and σ220) for two parallel cracks with s mall distance ( Dh<2a or Dv<a). Additionally, KIII increase with increasing anisotropic ratio C44/C55.初始应力在航空航天工程和预应力结构应用中是一种普遍现象。现有文献主要关注初始应力对多裂纹的Ⅰ型和Ⅱ型应力强度因子（SIFs）或单裂纹的Ⅲ型 SIFs 的影响。本研究采用复势法和伪牵引法对初始应力作用下正交各向异性弹性薄板中多任意Ⅲ型裂纹的相互作用进行了理论分析。首先，利用复势法推导了初始应力作用下正交各向异性弹性介质中单裂纹任意位置上一对反平面集中力的基本解。然后，基于推导出的解，通过叠加原理建立了弗雷德霍姆积分方程组。最后，分析了初始应力、裂纹相对位置、各向异性比和层理面角度对预应力正交各向异性弹性薄板中两个任意裂纹应力强度因子的影响。数值结果表明，初始应力 σ110（平行于裂纹）对应力强度因子（SIFs）影响不大，但对于两条共线裂纹，垂直于裂纹的初始应力 σ220 影响最为显著。对于间距较小的两条平行裂纹（Dh<2a 或 Dv<a），KIII 随初始应力（σ110 和 σ220）的增加而减小。此外，KIII 随着各向异性比 C44/C55 的增大而增大。An integrated modeling of AFP tow-drop defects and curing process of variable-stiffness thermoset composite laminatesRutong Yang, Shengnan Zhang, Yingjie Xu, Weihong Zhangdoi:10.1016/j.tws.2025.114064变刚度热固性复合材料层合板AFP拖降缺陷与固化过程的集成建模This paper investigates the effects of tow-drop defects on the curing residual stress and deformation of variable-stiffness laminates. Tow-drop defects refer to s mall triangular resin-rich regions without fibers that are produced when tow overlaps are cut during the manufacturing of variable-stiffness thermoset composite laminates with curvilinear fiber paths using automated fiber placement (AFP) technology. An integrated modeling is proposed to incorporate the tow-drop defects into the curing process simulation. The geometric model of variable-stiffness laminates including tow-drop defects is established first. Thermal-chemical coupled and thermal-mechanical coupled an alyses are then performed to reveal the evolution mechanis m of curing residual stress and deformation. Influences of fiber orientation, tow width and tow number of the AFP process are further investigated. The results show that the tow-drop defects affect the curing quality of thermoset variable-stiffness composites. Especially, the lower tow width and higher tow number can greatly reduce the defects.研究了拖降缺陷对变刚度层合板固化残余应力和变形的影响。拖滴缺陷是指在使用自动纤维铺放（AFP）技术制造具有曲线纤维路径的变刚度热固性复合材料层压板时，在切割两束重叠时产生的没有纤维的小三角形富树脂区域。提出了一种将拖曳缺陷纳入固化过程仿真的集成建模方法。首先建立了含拖曳缺陷的变刚度层合板的几何模型。然后进行热化学耦合和热力学耦合分析，揭示了固化残余应力和变形的演化机制。进一步研究了纤维取向、纤维束宽度和纤维束数对AFP工艺的影响。结果表明：热固性变刚度复合材料的固化质量受到拖降缺陷的影响。特别是较低的拖束宽度和较高的拖束数可以大大减少缺陷。Synergistic energy absorption mechanis ms in UHMWPE laminates subjected to sequential high-velocity impacts: an experimental investigationYuhang Xiang, Zhongwei Zhang, Xiaoning Yang, Qingya Sun, Ziming Xiong, Mingyang Wangdoi:10.1016/j.tws.2025.114065超高分子量聚乙烯层压板在连续高速冲击下的协同能量吸收机制：一项实验研究This study investigated the dynamic response and energy absorption of UHMWPE plain-woven laminates under sequential high-velocity impacts. DIC and CT techniques were used to ana lyze the effect of different velocity combinations and impact spacing on the impact resistance of the laminates, including ballistic limits, energy absorption, and damage modes. The results notably revealed a velocity-spacing coupling effect governing secondary ballistic limits. Specifically, at a 1 cm spacing, increases in primary velocity reduced the secondary ballistic limit by up to 4.3%. Conversely, increasing the spacing to 2.5 cm elevated this limit to 220.54 m/s. Initial damage was found to reduce the delamination threshold force of the laminate. A dual-velocity synergistic effect in energy absorption efficiency was observed with a negative correlation of the overall energy absorption efficiency and the impact velocity of both impacts. Secondary impacts induced significant stiffness degradation, manifesting as 59.4% amplitude reduction and a 58.6% frequency increase. These phenomena highlighted the dynamic coordination between damage accumulation and energy dissipation. Enhancing interlayer bonding strength is identified as a decisive factor for optimizing the sequential high-velocity impact protection properties of UHMWPE laminates. This research provides fundamental insights for predicting composite material behavior and structural design under sequential high-velocity threats.研究了超高分子量聚乙烯平织层压板在连续高速冲击下的动态响应和能量吸收。采用DIC和CT技术分析了不同速度组合和冲击间隔对层合板抗冲击性能的影响，包括弹道极限、能量吸收和损伤模式。结果表明，速度-间距耦合效应控制了二次弹道极限。具体来说，在1厘米的间距下，初级速度的增加使次级弹道极限降低了4.3%。相反，将间距增加到2.5 cm将该极限提高到220.54 m/s。发现初始损伤降低了层合板的分层阈值力。能量吸收效率存在双速度协同效应，总能量吸收效率与两次撞击的冲击速度呈负相关。二次冲击引起了明显的刚度退化，表现为幅度降低59.4%，频率增加58.6%。这些现象突出了损伤积累与能量耗散之间的动态协调关系。提高层间结合强度是优化超高分子量聚乙烯层合板序贯高速冲击防护性能的决定性因素。该研究为预测复合材料在连续高速威胁下的行为和结构设计提供了基础见解。Surface damage characterisation of longitudinal torsional ultrasonic vibration-assisted grinding of orthogonally woven SiCf/SiC composites based on different fibre orientationQixuan Sun, Zhen Yin, Qinglong An, Zehui Liang, Qing Miao, Chenwei Dai, Ming Zhang, Hua Li, Chenwei Shandoi:10.1016/j.tws.2025.114066基于不同纤维取向的正交编织SiCf/SiC复合材料纵向扭转超声振动辅助磨削表面损伤特征Owing to their exceptional properties, including high-temperature resistance, corrosion resistance, and low density, SiCf/SiC composites have emerged as promising candidate materials for hot-section components in aeroengines. However, their exceptional hardness, inherent brittleness, and anisotropic structure make them highly susceptible to severe machining-induced damage. To address this issue, comparison experiments between longitudinal torsional ultrasonic vibration-assisted grinding (LTUAG) and conventional grinding (CG) comparison experiments were performed on SiCf/SiC composites. Quantitative characterisation of fibre surface damage was performed with respect to grinding direction and fibre orientation. Fibre pull-out length, edge chipping factor, and three-dimensional surface roughness (Sa) were used to comprehensively evaluate the surface damage behaviour of SiCf/SiC composites and to explore methods for surface damage suppressing during LTUAG. The results showed that LTUAG increased grain grinding speed and enhanced instantaneous impact force, thereby reducing fibre fracture and pull-out length. Moreover, ultrasonic vibration can promote micro-brittle fracture of the material and reduce the phenomenon of fibre debonding. When the grinding direction was parallel to fibre orientation, a longitudinal amplitude of 8 μm produced the shortest transversal fibre pull-out length and minimal surface damage. When the grinding direction was perpendicular to the fibre orientation, a larger longitudinal amplitude of 10 μm more effectively suppressed edge chipping damage of longitudinal fibres. When the grinding direction formed an acute angle with fibre orientation, surface damage and surface roughness were markedly reduced. Grinding along the transversal fibre direction provided optimal damage suppression, achieving a minimum surface roughness Sa value of 2.54 μm.由于其优异的性能，包括耐高温、耐腐蚀和低密度，SiCf/SiC复合材料已成为航空发动机热截面部件的有前途的候选材料。然而，其特殊的硬度、固有的脆性和各向异性结构使其极易受到严重的加工损伤。为了解决这一问题，对SiCf/SiC复合材料进行了纵向扭转超声振动辅助磨削（LTUAG）和常规磨削（CG）的对比实验。根据磨削方向和纤维取向对纤维表面损伤进行了定量表征。利用纤维拔出长度、边缘切屑因子和三维表面粗糙度（Sa）综合评价SiCf/SiC复合材料的表面损伤行为，探索LTUAG过程中抑制表面损伤的方法。结果表明：LTUAG提高了磨粒速度，增强了瞬时冲击力，从而减少了纤维断裂和拉出长度；超声振动可以促进材料的微脆性断裂，减少纤维脱粘现象。当磨削方向与纤维方向平行时，纵向振幅为8 μm时，纤维横向拔出长度最短，表面损伤最小；当磨削方向垂直于纤维取向时，10 μm的纵向振幅更有效地抑制了纵向纤维的边缘切削损伤。当磨削方向与纤维取向成锐角时，表面损伤和表面粗糙度显著降低。沿纤维横向方向磨削的损伤抑制效果最佳，表面粗糙度Sa值最小为2.54 μm。Experimental and numerical study on the load-bearing characteristics of composite elliptical pressure vessel heads under hydrostatic pressureShuo Wang, Xinyang Zhao, Zhiyuan Mei, Ying Peng, Guotao Chendoi:10.1016/j.tws.2025.114068静水压力下复合椭圆压力容器封头承载特性的实验与数值研究The present study investigated the load-bearing characteristics and layup optimization of composite elliptical pressure vessel heads under hydrostatic pressure, both experimentally and numerically. By performing synchronized strain measurements on inner and outer surfaces, we provide the first direct experimental evidence that structural failure arises primarily from root bending moments, easily lead to meridional compression failure (maximum experiment-simulation deviation: 10%). Through parametric finite element an alysis, it was found that the [±θ0]s layup with θ0 = 42° has the optimal ultimate bearing capacity, and the fiber compression failure of this layup can maximize the compressive resistance. Crucially, a stress-matched [circumferential/meridional]s optimization strategy was proposed, reducing maximum circumferential stress by 28.76% and meridional stress by 42.67% while enhancing ultimate bearing capacity by 46.41% versus quasi-isotropic layups. These findings establish new design paradigms for lightweight deep-sea pressure vessels.本研究通过实验和数值模拟的方式，对复合材料椭圆形压力容器封头在静水压力下的承载特性及铺层优化进行了研究。通过同步测量内、外表面应变，首次直接提供了实验证据，表明结构失效主要源于根部弯矩，容易导致子午向压缩失效（实验与模拟的最大偏差：10%）。通过参数化有限元分析发现，[±θ0]s 铺层在 θ0 = 42° 时具有最佳的极限承载能力，且这种铺层的纤维压缩失效能最大程度地提高抗压能力。关键的是，提出了一种应力匹配的[周向/子午向]s 优化策略，与准各向同性铺层相比，最大周向应力降低了 28.76%，子午向应力降低了 42.67%，极限承载能力提高了 46.41%。这些发现为轻质深海压力容器的设计开辟了新的范式。An alysis and optimization of energy-absorbing characteristics of variable gradient helical energy absorption components of anti-shock hydraulic supportChenguang Guo, Xin Mei, Yonghui Xiao, Yishan Pan, Shuwen Wang, Jianzhuo Zhangdoi:10.1016/j.tws.2025.114073抗冲击液压支架变梯度螺旋吸能部件吸能特性分析与优化Based on the design concept of actively tunable energy absorption in anti-impact energy-absorbing hydraulic supports, this study proposes a novel variable-gradient helical energy-absorbing component and investigates its energy absorption characteristics. First, a thin-walled metallic helical structure with multiple curvatures was designed. An energy absorption model was developed using the energy dynamic equation tailored to the variable-gradient helical geometry. Then, nonlinear dynamic simulations were performed using finite element a nalysis (FEA) software to evaluate the compressive energy absorption behavior. A comparative an alysis of different structural parameters—wall thickness, base circle radius of the end face, and edge slope—was conducted through a multi-parameter experimental design to understand their influence on energy absorption performance. Finally, a machine learning approach was employed to predict the performance of the energy-absorbing component and optimize its structural parameters to maximize energy absorption under identical impact conditions. The results indicate that the optimal performance is achieved when the component has a wall thickness of 7.7 mm, a base circle radius of 95 mm, and an edge slope of 66°. Finite element simulations were conducted under the same crushing conditions based on the optimized parameters. Additionally, an experimental platform was developed to test the crushing behavior of the energy-absorbing component. The energy absorption characteristics obtained from machine learning predictions, FEA simulations, and physical crushing experiments showed energy absorption errors of 6.48% and 8.90%, respectively, with all errors in energy absorption and average crushing force within 10%. Compared to other parameter combinations, the optimized component exhibited significantly improved stepwise energy absorption performance within the effective displacement range.基于抗冲击吸能液压支架主动可调吸能设计理念，提出了一种新型变梯度螺旋吸能元件，并对其吸能特性进行了研究。首先，设计了具有多重曲率的薄壁金属螺旋结构。利用适合变梯度螺旋几何的能量动力学方程建立了能量吸收模型。然后，利用有限元软件进行非线性动力学仿真，以评估压缩能吸收行为。通过多参数实验设计，对比分析了不同结构参数（壁厚、端面基圆半径和边缘坡度）对吸能性能的影响。最后，采用机器学习方法预测吸能部件的性能并优化其结构参数，以在相同的冲击条件下最大限度地吸收能量。结果表明，当构件壁厚为7.7 mm，基圆半径为95 mm，边缘斜率为66°时，构件的性能最优。基于优化后的参数，在相同的破碎条件下进行了有限元仿真。此外，还建立了吸能构件破碎性能试验平台。从机器学习预测、有限元模拟和物理破碎实验中获得的能量吸收特性显示，能量吸收误差分别为6.48%和8.90%，能量吸收误差和平均破碎力误差均在10%以内。与其他参数组合相比，优化后的构件在有效位移范围内的阶跃吸能性能显著提高。来源：复合材料力学仿真Composites FEM