界面粗糙度和预裂纹对隔热涂层裂纹扩展影响的离散元建模

IF 2.8 3区工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

Computational Particle Mechanics Pub Date : 2024-05-25 DOI:10.1007/s40571-024-00777-0

Yafeng Li, Hongfei Gao, Lei Wang, Yulin Sun, Jing Zhang

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引用次数: 0

摘要

颗粒侵蚀是隔热涂层的一种主要失效机制。在这项工作中，开发了一个离散元素模型来模拟颗粒侵蚀引起的裂纹扩展。重点研究了界面结合层粗糙度和预裂纹的影响。结果表明，随着结合层粗糙度的增加，分层裂纹的扩展长度减小。粗糙度增加时，分层裂纹受到抑制。初始垂直 TC 缺陷能有效抑制新裂纹的成核和扩展。这项研究为理解隔热涂层的裂纹失效机理提供了理论基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Discrete element modeling of effect of interfacial roughness and pre-crack on crack propagation in thermal barrier coatings

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Discrete element modeling of effect of interfacial roughness and pre-crack on crack propagation in thermal barrier coatings

Particle erosion is a major failure mechanism in thermal barrier coatings. In this work, a discrete element model is developed to simulate the crack propagation due to particle erosion. The effects of the interface bond layer roughness and pre-crack are focused. The results show that with the increasing roughness of the bonding layer, the extension length of the delamination cracks is reduced. The delamination cracks are suppressed when the roughness increases. The initial vertical TC defects can effectively inhibit the nucleation and extension of the new cracks. This study provides a theoretical foundation for understanding the crack failure mechanism in thermal barrier coatings.

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来源期刊

Computational Particle Mechanics Mathematics-Computational Mathematics

CiteScore

5.70

自引率

9.10%

发文量

期刊介绍： GENERAL OBJECTIVES: Computational Particle Mechanics (CPM) is a quarterly journal with the goal of publishing full-length original articles addressing the modeling and simulation of systems involving particles and particle methods. The goal is to enhance communication among researchers in the applied sciences who use "particles'''' in one form or another in their research. SPECIFIC OBJECTIVES: Particle-based materials and numerical methods have become wide-spread in the natural and applied sciences, engineering, biology. The term "particle methods/mechanics'''' has now come to imply several different things to researchers in the 21st century, including: (a) Particles as a physical unit in granular media, particulate ﬂows, plasmas, swarms, etc., (b) Particles representing material phases in continua at the meso-, micro-and nano-scale and (c) Particles as a discretization unit in continua and discontinua in numerical methods such as Discrete Element Methods (DEM), Particle Finite Element Methods (PFEM), Molecular Dynamics (MD), and Smoothed Particle Hydrodynamics (SPH), to name a few.