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Mechanical response of carbon ion implanted ferrite via atomic simulations 通过原子模拟研究碳离子植入铁氧体的机械响应
IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL Pub Date : 2024-11-19 DOI: 10.1016/j.ijmecsci.2024.109837
Jiangping Zhu , Wen Shao , Weiwei Huang , Jinyuan Tang , Tingting Jiang , Xiaocheng Shen
Ion implantation plays a nontrivial role in improving the mechanical properties of materials. Unfortunately, the atomic-scale understanding and awareness of the improvement mechanisms remain insufficiently clear and accurate. This paper investigates the nanostructural evolution of carbon ion implanted ferrite and the mechanical response under uniaxial tension leveraging molecular dynamics (MD) simulation, providing direct atomic-scale evidence of alloy strengthening. Regarding nanostructural evolution, grain boundary migration induced by carbon ion implantation becomes significant with increasing doses. However, point defects and amorphous structures caused by collision cascades tend to saturate gradually with increasing implantation doses. Uniaxial tensile test results indicate that the strength of all ion-implanted samples is appreciably enhanced compared to non-implanted samples, especially with an implantation dose of 6.23 × 1013 ions/cm2, where the strength increases by 39%. The underlying strengthening mechanism is that defects, amorphous structures, and lattice distortions induced by ion implantation collectively act as formidable barriers to dislocation motion during plastic deformation, strongly governing dislocation propagation and multiplication. More importantly, the interaction between carbon atoms from ion implantation and dislocations renders the formation of Cottrell atmospheres, which further enhances solid solution strengthening by pinning dislocations. These results advancing the fundamental understanding of nanostructural evolution and strengthening mechanism under ion implantation suggest a mechanistic strategy for augmenting alloy strength.
离子注入在改善材料力学性能方面发挥着非同小可的作用。遗憾的是,人们对原子尺度的理解和对改善机制的认识仍然不够清晰和准确。本文利用分子动力学(MD)模拟研究了碳离子注入铁素体的纳米结构演变和单轴拉伸下的力学响应,为合金强化提供了直接的原子尺度证据。在纳米结构演变方面,随着剂量的增加,碳离子注入诱导的晶界迁移变得显著。然而,碰撞级联引起的点缺陷和无定形结构会随着植入剂量的增加而逐渐饱和。单轴拉伸试验结果表明,与非植入样品相比,所有离子注入样品的强度都有明显提高,尤其是当植入剂量为 6.23 × 1013 离子/cm2 时,强度提高了 39%。其潜在的强化机制是离子注入引起的缺陷、无定形结构和晶格畸变在塑性变形过程中共同成为位错运动的强大障碍,有力地控制了位错的传播和倍增。更重要的是,离子注入产生的碳原子与位错之间的相互作用形成了 Cottrell 大气,通过钉住位错进一步增强了固溶体的强度。这些结果从根本上加深了对离子注入下纳米结构演变和强化机制的理解,为提高合金强度提供了一种机理策略。
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引用次数: 0
Optimization method for nozzle control of governing turbine 调节式涡轮机喷嘴控制的优化方法
IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL Pub Date : 2024-11-19 DOI: 10.1016/j.ijmecsci.2024.109773
Yin Guan , Wen Li , Xinjing Zhang , Yangli Zhu , Xing Wang , Yifeng Zhang , Zhicheng Qi , Haisheng Chen
The compressed air energy storage (CAES) system necessitates rapid and precise adjustment of turbine operational states to align with fluctuating system loads during the energy release process. As the air storage pressure continuously declines, the adoption of an appropriate air distribution method becomes imperative to enhance turbine performance. This study innovatively investigates the coupled optimal method of nozzle control (NC) and relative stator installation angle (RSIA) to achieve maximum specific work under certain output work conditions, initially proposing the optimal method as a strong candidate for engineering applications. The stator channel has undergone redesign to allow adjustment of the stator installation angle. It is investigated to obtain the response surface model of specific work and output work with base pressure (BP), regulated pressure, inlet nozzle number, and RSIA as independent variables, and the maximum specific work as the optimization objective. The results indicate that, compared with the original NC method at rated output work, the optimized operation markedly elevates the specific work by a maximum of 6.1 % and an average of 3.4 %. Furthermore, the majority of losses within the turbine are attributed to entropy production rate by turbulent dissipation, accounting for up to 88.7 % of the total losses. The optimal method satisfies the output work requirement by adjusting the inlet nozzle number and RSIA without throttling the inlet nozzles under different BP conditions. This is achieved by adopting the 3-nozzle inlet method under high BP and the 4-nozzle inlet method under relatively lower BP conditions. The present study offers theoretical support for the optimal design and operation control of NC turbines, which has broad prospective applications in the optimized air distribution regulation of CAES systems.
压缩空气储能(CAES)系统需要快速、精确地调整涡轮机的运行状态,以适应能量释放过程中系统负荷的波动。随着储气压力的不断降低,采用适当的配气方法来提高涡轮机的性能变得势在必行。本研究创新性地研究了喷嘴控制(NC)和定子相对安装角(RSIA)的耦合优化方法,以在特定输出功条件下实现最大比功,并初步提出了该优化方法作为工程应用的有力候选方案。定子通道经过重新设计,允许调整定子安装角。研究以基础压力(BP)、调节压力、入口喷嘴数量和 RSIA 为自变量,以最大比功为优化目标,获得比功和输出功的响应面模型。结果表明,与额定输出功下的原始数控方法相比,优化操作显著提高了比功,最大提高了 6.1%,平均提高了 3.4%。此外,涡轮机内的大部分损失归因于湍流耗散产生的熵率,占总损失的 88.7%。在不同的 BP 条件下,通过调整进气喷嘴数量和 RSIA,而不对进气喷嘴进行节流,最优方法满足了输出功的要求。这是通过在高 BP 条件下采用 3 喷嘴进气法和在相对较低的 BP 条件下采用 4 喷嘴进气法实现的。本研究为数控涡轮机的优化设计和运行控制提供了理论支持,在 CAES 系统的优化配气调节方面具有广阔的应用前景。
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引用次数: 0
Strain mediated transition between skyrmion and antiskyrmion in ferromagnetic thin films 铁磁性薄膜中应变介导的锡金离子与反锡金离子之间的转变
IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL Pub Date : 2024-11-19 DOI: 10.1016/j.ijmecsci.2024.109849
Jiajun Sun , Shengbin Shi , Peng Han , Yu Wang , Yunhong Zhao , Bai-Xiang Xu , Jie Wang
Magnetic topological structures have attracted great attention due to their potential applications in memory and logic devices. Achieving the controllable transition between different magnetic topological structures is crucial for their application. Here, we develop a phase field model with strain-modulated Dzyaloshinskii-Moriya interaction (DMI) and predict the controllable transitions between skyrmion and antiskyrmion states in a ferromagnetic thin film through the application of different strains. It is found that the anisotropic DMI induced by anisotropic strains in the thin film plays an important role in the transitions between various magnetic structures, including skyrmion, antiskyrmion, single domain, and helical domain. Anisotropic DMI also has a significant impact on the chirality and deformation of magnetic topological structures, among which anisotropic DMI can cause anisotropic deformation of skyrmions and antiskyrmions. Furthermore, the formation mechanism of antiskyrmions is elucidated by decomposing the magnetization vectors into Bloch and Néel-type components based on the Lifshitz invariant. This work not only provides an insight into the dynamic behaviors of topological structures but also suggests a new method for controlling magnetic configurations through strain engineering.
磁拓扑结构因其在存储器和逻辑器件中的潜在应用而备受关注。实现不同磁拓扑结构之间的可控转换对其应用至关重要。在这里,我们建立了一个具有应变调制的 Dzyaloshinskii-Moriya 相互作用(DMI)的相场模型,并预测了铁磁薄膜中通过施加不同应变实现的天磁态和反天磁态之间的可控转变。研究发现,薄膜中的各向异性应变所诱导的各向异性 DMI 在各种磁性结构之间的转换中起着重要作用,这些磁性结构包括天磁态、反天磁态、单畴态和螺旋畴态。各向异性 DMI 对磁性拓扑结构的手性和变形也有重要影响,其中各向异性 DMI 可导致天磁和反天磁的各向异性变形。此外,基于 Lifshitz 不变式,通过将磁化矢量分解为布洛赫和奈尔型分量,阐明了反回线的形成机制。这项研究不仅深入揭示了拓扑结构的动态行为,还提出了一种通过应变工程控制磁性构型的新方法。
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引用次数: 0
Constrained elastica under edge thrust: Nonlinear springy walls 边缘推力下的约束弹性:非线性弹性壁
IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL Pub Date : 2024-11-17 DOI: 10.1016/j.ijmecsci.2024.109841
Nitzan Judah, Sefi Givli
The post-buckling behavior of a slender beam that is laterally constrained between two parallel walls is studied, where one wall is fixed and the other is pushed by the beam against a nonlinear spring. This model system is of relevance to a range of engineering applications and physical systems, such as deep drilling, stent procedures, and filopodia growth in living cells. The mathematical model accounts for large rotation and for various possible contact scenarios between the beam and the walls. The predictions of the model are compared with published experiments and show very good qualitative and quantitative agreement, thus reconciling important discrepancies between the results of published small-deformation models and available experimental observations. Although the large-deformation analysis cannot provide closed-form analytical description, we were able to identify key features of the behavior by careful examination of the mathematical structure of the nonlinear governing equations. In particular, we provide universal maps related to the occurrence of critical events during the loading process, which are expressed in terms of two non-dimensional quantities that describe the mode-corrected relative stiffness and relative gap between the walls. These universal maps enable a simple and straight-forward characterization of the system behavior, in all modes, and therefore provide an excellent platform for engineering design and for practical use. Based on these universal maps, one is able to describe, almost completely, the expected behavior of the system. In addition, extensive numerical results demonstrate the richness of possible behavior, and how it depends on all parameters of the system in an intricate manner.
研究了横向约束在两个平行壁之间的细长梁的后屈曲行为,其中一个壁是固定的,另一个壁由梁对非线性弹簧的推动。该模型系统与一系列工程应用和物理系统相关,例如深钻,支架程序和活细胞中的丝状足生长。该数学模型考虑了大旋转和梁与墙之间各种可能的接触情况。将模型的预测结果与已发表的实验结果进行了比较,并显示出非常好的定性和定量一致性,从而调和了已发表的小变形模型结果与现有实验观测结果之间的重要差异。虽然大变形分析不能提供封闭形式的分析描述,但我们能够通过仔细检查非线性控制方程的数学结构来识别行为的关键特征。特别是,我们提供了与加载过程中发生的关键事件相关的通用图,这些图以描述模态校正后的相对刚度和墙之间的相对间隙的两个无维量表示。这些通用图能够在所有模式下对系统行为进行简单而直接的描述,因此为工程设计和实际使用提供了一个优秀的平台。基于这些通用映射,人们可以几乎完全地描述系统的预期行为。此外,广泛的数值结果显示了可能行为的丰富性,以及它如何以复杂的方式依赖于系统的所有参数。
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引用次数: 0
Indentation response characteristics of a piezoelectric semiconductor layer 压电半导体层的压痕响应特性
IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL Pub Date : 2024-11-16 DOI: 10.1016/j.ijmecsci.2024.109809
Shijing Gao , Chengjian Ju , Guoquan Nie , Jinxi Liu , Weiqiu Chen
The interaction of piezoelectricity with semiconducting property in piezoelectric semiconductors (PSCs) can be utilized to realize the amplification and gain of elastic waves and to tune the electronic property. This not only makes PSCs have enormous potential in multifunctional electronic devices, but also raises many multi-field coupled problems that need to be investigated. This paper considers the axisymmetric frictionless indentation responses of a PSC layer, which is perfectly bonded to a rigid substrate and acted on by a rigid spherical indenter. While both the indenter and the rigid substrate are assumed to be electrically insulating, the interaction of piezoelectricity and semiconducting property of a PSC layer is fully taken into consideration. By the Hankel integral transformation, the indentation problem is reduced to a Fredholm integral equation of the second kind, which is solved numerically. For the PSC ZnO layer, the numerical results for the indentation force, electric potential and contact radius are presented to systemically explore the effect of the layer thickness, indenter size and semiconducting property on the response of the PSC layer under indentation. It is found that the critical thickness, at which the thickness effect may be neglected, is dependent on the indentation depth. The influence range of semiconducting property on indentation response is related to the thickness of the PSC layer. Furthermore, the theoretical results based on the singular integral equation method are verified by the finite element simulation. This study is useful for a better understanding of the interaction between piezoelectricity and semiconducting property of PSC materials, which has potential value for developing indentation techniques to extract the coupling characteristics of PSC materials.
压电半导体(PSCs)中压电性与半导体特性的相互作用可用于实现弹性波的放大和增益,以及调整电子特性。这不仅使压电半导体在多功能电子器件中具有巨大潜力,同时也提出了许多需要研究的多场耦合问题。本文考虑了 PSC 层的轴对称无摩擦压痕响应,该层与刚性基底完美粘合,并受到刚性球形压头的作用。在假设压头和刚性基底均为电绝缘的同时,充分考虑了 PSC 层的压电性和半导体特性的相互作用。通过汉克尔积分变换,压痕问题被简化为弗里德霍尔姆第二类积分方程,并对其进行数值求解。针对 PSC ZnO 层,给出了压痕力、电动势和接触半径的数值结果,系统地探讨了层厚、压头尺寸和半导体特性对 PSC 层在压痕作用下响应的影响。研究发现,可以忽略厚度效应的临界厚度取决于压痕深度。半导体特性对压痕响应的影响范围与 PSC 层的厚度有关。此外,有限元模拟验证了基于奇异积分方程法的理论结果。这项研究有助于更好地理解 PSC 材料的压电性与半导体特性之间的相互作用,对于开发压痕技术以提取 PSC 材料的耦合特性具有潜在价值。
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引用次数: 0
Modeling of cryo-deformation based on grain size-dependent dislocation evolution 基于晶粒尺寸相关位错演化的低温变形建模
IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL Pub Date : 2024-11-16 DOI: 10.1016/j.ijmecsci.2024.109813
Wei Liu , Ruiqian Wang , Huabo Zhou , Mengjia Yao , Wen Sun , Yuanpu Zhu , Yuanpeng Li
In this paper, a physical-based constitutive model for cryogenic deformation was established by introducing internal variables related to temperature, T and grain size, d. Uniaxial tensile tests and microstructure observations were carried out to reveal macroscopic deformation behavior and corresponding microscopic deformation mechanism. The classical Kocks–Mecking model was modified by distinguishing the significant differences in the dislocation evolution in the grain interior and in the vicinity of the grain boundary. The parameters of the constitutive model were optimized by genetic algorithm (GA). The developed constitutive model was comprehensively validated, including the stress-strain curves and formability indexes at the macro level and the evolution of dislocation density at the micro level by using in-situ digital image correlation (DIC) tests and quasi-in-situ electron backscattered diffraction (EBSD) characterization. The coupling effects of grain size and cryogenic temperature (CT) on the evolution of dislocation are quantitatively analyzed and discussed based on the established constitutive model. The studies show that the constitutive model can effectively address the coupling effects of grain size and CT on the deformation behavior of pure aluminum, and accurately describe the deformation characteristics of heterogeneous sheets with gradient grain size at different temperatures. In addition, parametric analysis shows that the predominant dislocation annihilation in ultra-fine grained (UFG) pure aluminum gradually transitions from the vicinity of the grain boundary to the grain interior with the decrease in temperature, resulting in the significant weakening of the strength-plasticity trade-off relationship at cryogenic temperature. These results deepen the understanding of the grain size-dependent cryo-deformation and inspire a promising idea for the direct manufacture of heterogeneous components with grain size gradients.
本文通过引入与温度 T 和晶粒大小 d 相关的内部变量,建立了基于物理的低温变形构成模型,并进行了单轴拉伸试验和微观结构观察,以揭示宏观变形行为和相应的微观变形机制。通过区分晶粒内部和晶界附近位错演变的显著差异,对经典的 Kocks-Mecking 模型进行了修改。通过遗传算法(GA)对构成模型的参数进行了优化。通过原位数字图像相关(DIC)测试和准原位电子反向散射衍射(EBSD)表征,对所开发的构成模型进行了全面验证,包括宏观层面的应力-应变曲线和成形性指标,以及微观层面的位错密度演变。基于已建立的构成模型,定量分析和讨论了晶粒尺寸和低温温度(CT)对位错演变的耦合效应。研究表明,该构成模型能有效解决晶粒尺寸和 CT 对纯铝变形行为的耦合效应,并能准确描述具有梯度晶粒尺寸的异质薄片在不同温度下的变形特性。此外,参数分析表明,随着温度的降低,超细晶粒(UFG)纯铝中占主导地位的位错湮灭逐渐从晶界附近过渡到晶粒内部,导致低温下强度-塑性权衡关系显著减弱。这些结果加深了人们对依赖于晶粒尺寸的低温变形的理解,并为直接制造具有晶粒尺寸梯度的异质部件提供了一种可行的思路。
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引用次数: 0
Solid dielectric electrochemical polishing of 3D-printed parts: Performance and mechanisms 三维打印部件的固体电介质电化学抛光:性能和机理
IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL Pub Date : 2024-11-16 DOI: 10.1016/j.ijmecsci.2024.109822
Shenggui Liu , Chaojiang Li , Xin Jin , Dingyifei Ma , Qi Yan , Guodong Liu , Jue Liu , Xun Cao , Hao Wang
Surface post-processing of metal additive manufacturing components is challenging due to their typically complex geometries (e.g., curved surfaces) coupled with high initial surface roughness. Herein, we propose an efficient solid dielectric electrochemical polishing (SDECP) method employing ion exchange resin particles with a porous structure that absorbs and stores electrolytes as a conductive medium. This method enhances the surface quality of additively manufactured components with Bézier curved surfaces to a mirror finish, achieving improvements in Sa, Sq, and Sz of 91.5%, 91.7%, and 86.9%, respectively. Planetary motion strategies are implemented to optimize mass transfer on the anode surface in the discontinuous solid dielectric. Results indicate that bidirectional planetary motion (BPR) in SDECP effectively improves the uniformity of surface roughness and material removal across different regions of the part. Furthermore, we quantitatively describe the relationship between material removal rate (MRR) and average current in SDECP. The intermittent material removal mechanism of SDECP is elucidated utilizing discrete element method (DEM) simulations. Our work offers innovative insights into the material removal mechanisms of SDECP, presenting an efficient approach for overall surface post-processing of metal additive manufacturing components.
由于金属增材制造部件通常具有复杂的几何形状(如曲面)和较高的初始表面粗糙度,因此对其进行表面后处理极具挑战性。在此,我们提出了一种高效的固体电介质电化学抛光(SDECP)方法,该方法采用具有多孔结构的离子交换树脂颗粒作为导电介质,可吸收和储存电解质。这种方法能将贝塞尔曲面快速成型部件的表面质量提高到镜面效果,Sa、Sq 和 Sz 分别提高了 91.5%、91.7% 和 86.9%。实施行星运动策略是为了优化不连续固体电介质中阳极表面的传质。结果表明,SDECP 中的双向行星运动(BPR)可有效改善零件不同区域的表面粗糙度和材料去除的均匀性。此外,我们还定量描述了 SDECP 中材料去除率(MRR)与平均电流之间的关系。利用离散元素法 (DEM) 模拟阐明了 SDECP 的间歇性材料去除机制。我们的工作为 SDECP 的材料去除机制提供了创新见解,为金属快速成型部件的整体表面后处理提供了一种高效方法。
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引用次数: 0
Temperature–amplitude spectrum for early full-field vibration-fatigue-crack identification 用于早期全场振动-疲劳-裂纹识别的温度-幅值谱
IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL Pub Date : 2024-11-16 DOI: 10.1016/j.ijmecsci.2024.109829
Martin Česnik, Janko Slavič
A dynamic structure under vibration loading within its natural frequency range can experience failure due to vibration fatigue. Understanding the causes of such failure requires pinpointing the initiation time and location of fatigue cracks, tracking their propagation, and identifying the frequency range of critical stress responses. This research introduces a novel, thermoelasticity-based method – the Temperature–Amplitude Spectrum (TAS) method – for early-stage, full-field, and non-contact crack detection that operates during uninterrupted vibration testing. This method leverages high-speed infrared imaging to analyze the specimen’s temperature–amplitude spectrum, capturing comprehensive crack-related information, including initiation and propagation, in real time. Experimentally validated on both 3D-printed polymer and aluminum specimens, the TAS method accurately identified crack locations and paths without complex adjustments to the experimental setup or data processing. This new approach advances vibration-fatigue testing by enabling reliable, high-resolution crack detection and analysis while remaining computationally efficient.
动态结构在其固有频率范围内承受振动载荷时,可能会因振动疲劳而失效。要了解这种失效的原因,需要精确定位疲劳裂纹的起始时间和位置,跟踪其扩展情况,并确定临界应力响应的频率范围。这项研究引入了一种基于热弹性的新方法--温度-幅值频谱(TAS)方法,用于在不间断振动测试期间进行早期、全场和非接触式裂纹检测。该方法利用高速红外成像技术分析试样的温度-振幅谱,实时捕捉与裂纹相关的综合信息,包括裂纹的产生和扩展。通过在 3D 打印聚合物和铝试样上进行实验验证,TAS 方法无需对实验装置或数据处理进行复杂调整,即可准确确定裂纹位置和路径。这一新方法实现了可靠、高分辨率的裂纹检测和分析,同时保持了计算效率,从而推动了振动疲劳测试的发展。
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引用次数: 0
Single Level Fast Multipole Method for frictionless rough contact problems 无摩擦粗糙接触问题的单级快速多极法
IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL Pub Date : 2024-11-15 DOI: 10.1016/j.ijmecsci.2024.109810
Claudia Stiebritz , Hai-Ping YIN , Julien Cesbron
A perfectly smooth contact surface does not exist in nature and industrial applications. Even a body, that seems perfectly smooth to the naked eye, will show surface roughness at a higher magnification. Due to the roughness of the surface, there are areas of contact and separation, which increases the complexity of the contact calculation. However, this computational complexity increases further due to the multi-scale nature of road surface texture and large contact area in the case of tyre/road interaction. To reduce the computational complexity of this contact problem, the Single Level Fast Multipole Method (SLFMM) is developed within this paper. The contact problem is based on Boussinesq’s contact theory and for the time being, the influence of friction and lateral displacement are neglected. To validate the accuracy and reduction in computational complexity, the SLFMM was applied to rough surfaces of different complexities and compared to a reference method, the so-called Matrix Inversion Method (MIM). Results indicate that the new method computes the pressure distribution and displacement accurately, with a global error of less than 1%. The advantage of the new method compared to the MIM is the multipole expansion, which clusters adjacent contact points to a single center point. As a result, the computational complexity of the contact calculation is reduced. Overall, the Single Level FMM computes the results faster than the reference method. These results demonstrate that the Fast Multipole Method meets the requirements of accuracy and accelerated computation for rough contact problems.
在自然界和工业应用中不存在完全光滑的接触面。即使是肉眼看起来非常光滑的物体,在更高的放大倍数下也会显示出表面的粗糙。由于表面粗糙,存在接触和分离区域,增加了接触计算的复杂性。然而,由于路面纹理的多尺度特性和轮胎/路面相互作用时的大接触面积,这种计算复杂性进一步增加。为了降低这种接触问题的计算复杂度,本文提出了单能级快速多极法。接触问题基于Boussinesq的接触理论,暂时忽略摩擦和侧向位移的影响。为了验证SLFMM的精度和计算复杂度的降低,将SLFMM应用于不同复杂性的粗糙表面,并与参考方法——矩阵反演法(MIM)进行了比较。结果表明,该方法能准确地计算压力分布和位移,整体误差小于1%。与MIM相比,新方法的优点是多极扩展,它将相邻的接触点聚集到一个中心点上。从而降低了接触计算的计算复杂度。总的来说,单电平FMM计算结果比参考方法快。结果表明,快速多极子法满足粗糙接触问题的精度要求和计算速度要求。
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引用次数: 0
Multi-scale mechanics of submerged particle impact drilling 浸没式颗粒冲击钻孔的多尺度力学原理
IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL Pub Date : 2024-11-15 DOI: 10.1016/j.ijmecsci.2024.109838
Tiancheng Fang , Fushen Ren , Baojin Wang , Jianhua Hou , Marian Wiercigroch
Particle Impact Drilling (PID) technology is highly efficient for exploitation of unconventional energy resources in extra-deep and ultra-hard strata. The multi-scale dynamic responses and fracture mechanics analysis of rock formations in drilling using the PID are discussed in this paper. Firstly, rock fracture experiments and penetration performance under submerged particle jet impact were conducted to analyze fracture mechanisms in macro-scale. Then, the rock constitutive relation model and damage model for the submerged particle jet impacts using the damage and failure theory and correlation analysis model were constructed. On this basis, multi-scale dynamic responses and nonlinear analysis of failure performance with submerged particle jet impact were conducted. Our results indicate continuous damage growth in macro-scale and radial cracks development in micro-scale when submerged particles impact the drilled formation in a process of creating a well.
颗粒冲击钻井(PID)技术可高效开发超深、超硬地层中的非常规能源资源。本文讨论了使用 PID 进行钻探时岩层的多尺度动态响应和断裂力学分析。首先,进行了潜入式颗粒射流冲击下的岩石断裂实验和穿透性能,分析了宏观尺度下的断裂机理。然后,利用损伤与破坏理论和相关分析模型,构建了潜入式颗粒射流冲击的岩石构成关系模型和损伤模型。在此基础上,对潜入式颗粒射流冲击的多尺度动态响应和破坏性能进行了非线性分析。结果表明,当水下颗粒在打井过程中冲击钻井地层时,在宏观尺度上会出现持续的损伤增长,在微观尺度上会出现径向裂缝。
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引用次数: 0
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International Journal of Mechanical Sciences
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