独立层中的位错偶极子约束

IF 1.9 4区工程技术 Q3 MECHANICS

Mechanics Research Communications Pub Date : 2025-03-04 DOI:10.1016/j.mechrescom.2025.104384

Jérôme Colin

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引用次数: 0

摘要

利用Peach-Koehler力分析，从理论上研究了嵌入于独立层中且相对于结构中心对称分布的边缘位错偶极子的平衡位置。位错间距与层厚之间的临界“尺寸”比值已被确定，在该比值之下，除了排列稳定的位错构型外，还存在两种移位的位错构型，一种稳定，一种不稳定。超过这个临界比，只剩下不稳定的排列构型，表明空间约束和位错间距对偶极子稳定性的综合影响。

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Dislocation dipole confinement in a free-standing layer

The equilibrium positions of a dipole of edge dislocations embedded in a free-standing layer and symmetrically distributed with respect to the structure center has been theoretically investigated from a Peach–Koehler force analysis. A critical “size” ratio between the dislocation spacing and the layer thickness has been determined below which, in addition to the aligned stable configuration, two shifted dislocation configurations are present, one stable and one unstable. Beyond this critical ratio, only the unstable aligned configuration remains, demonstrating the combined effect of the spatial confinement and dislocation spacing on the dipole stability.

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来源期刊

Mechanics Research Communications 物理-力学

CiteScore

4.10

自引率

4.20%

发文量

114

审稿时长

9 months

期刊介绍： Mechanics Research Communications publishes, as rapidly as possible, peer-reviewed manuscripts of high standards but restricted length. It aims to provide: • a fast means of communication • an exchange of ideas among workers in mechanics • an effective method of bringing new results quickly to the public • an informal vehicle for the discussion • of ideas that may still be in the formative stages The field of Mechanics will be understood to encompass the behavior of continua, fluids, solids, particles and their mixtures. Submissions must contain a strong, novel contribution to the field of mechanics, and ideally should be focused on current issues in the field involving theoretical, experimental and/or applied research, preferably within the broad expertise encompassed by the Board of Associate Editors. Deviations from these areas should be discussed in advance with the Editor-in-Chief.