Determination of the influence of particle spatial distribution and interface heterogeneity on tensile fracture of ordinary refractory ceramics by applying discrete element modelling

IF 2.8 3区工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Computational Particle Mechanics Pub Date : 2024-03-21 DOI:10.1007/s40571-024-00716-z

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Abstract

The microstructures and local characteristics of ordinary refractory ceramics are heterogeneous. The discrete element (DE) method was used to consider the variation in particle spatial distributions and statistically distributed interface properties (uniform, Weibull) between elements. In addition, three Weibull distributions with different shape parameters were evaluated. A uniaxial tensile test was used to study the effects of particle spatial distributions and interface property distributions on the stress–strain curve, tensile strength, and crack propagation. The results of the test show that the particle spatial distribution significantly influences crack propagation and fracture patterns, and the interface condition plays an important role in mechanical responses, crack propagation, and fracture mechanisms and patterns. The discrete element modelling of uniaxial tensile and compressive tests shows that brittle materials exhibit asymmetric mechanical responses to compression and tension loading including static Young’s modulus.

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应用离散元素模型确定颗粒空间分布和界面异质性对普通耐火陶瓷拉伸断裂的影响

摘要普通耐火陶瓷的微观结构和局部特性是异质的。采用离散元素（DE）方法考虑了粒子空间分布的变化和元素间统计分布的界面特性（均匀分布、Weibull 分布）。此外，还评估了三种具有不同形状参数的 Weibull 分布。利用单轴拉伸试验研究了颗粒空间分布和界面属性分布对应力-应变曲线、拉伸强度和裂纹扩展的影响。试验结果表明，颗粒空间分布对裂纹扩展和断裂模式有显著影响，界面条件对力学响应、裂纹扩展、断裂机制和模式起着重要作用。单轴拉伸和压缩试验的离散元建模表明，脆性材料对压缩和拉伸加载（包括静态杨氏模量）表现出不对称的机械响应。

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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.