A new statistical fracture model for particles in unbound road materials

IF 3.9 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Materials and Structures Pub Date : 2025-08-22 DOI:10.1617/s11527-025-02760-4

M. Kaan Etikan, Denis Jelagin, Erik Olsson, Manfred N. Partl

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引用次数: 0

Abstract

Fracture of rock particles is important in many applications like mining, mineral comminution, unbound granular materials (UGMs) for railway and road structures. The latter application is the main interest presently, as fracture of rock particles in UGMs affects the UGMs performance and may compromise structural integrity of a pavement, potentially leading to premature road failures. Therefore, it is important to assess their resistance to aggregate fracture accurately. In this study, a new statistical fracture model for particle fracture, based on the results of single particle crushing tests, is introduced to investigate aggregate fracture. The proposed model is tested for UGMs composed of three different aggregate types: brick, granite and a volcanic material and its results are compared with other widely used fracture force models. The performance of the models is also investigated by simulating uniaxial monotonic compression tests on UGMs with different aggregate size distributions using the Discrete Element Method (DEM) and comparing the results with experiments. Fracture at two different load levels for three different particle size distributions are investigated for each material. One particle size distribution at one load level is used to identify the contact law parameters for each material, and single particle breakage test are used to identify the fracture force model parameters. The DEM models with a new fracture force model agrees well with the macro-mechanical behaviour observed in experiments and exhibits the highest degree of correlation to fracture results obtained from experiments.

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一种新的道路材料中颗粒断裂统计模型

岩石颗粒的断裂在采矿、矿物粉碎、铁路和公路结构的松散颗粒材料（UGMs）等许多应用中都很重要。后一种应用是目前的主要关注点，因为砾石砾石中岩石颗粒的破裂会影响砾石砾石的性能，并可能损害路面的结构完整性，可能导致路面过早失效。因此，准确评估其抗骨料断裂性能具有重要意义。本文在单颗粒破碎试验的基础上，提出了一种新的颗粒破碎统计模型，用于研究颗粒破碎。该模型在三种不同骨料类型（砖、花岗岩和一种火山材料）组成的ugm中进行了测试，并将其结果与其他广泛使用的断裂力模型进行了比较。采用离散元法（DEM）对不同骨料粒径分布的钢筋石进行单轴单调压缩试验，并与实验结果进行比较，研究了模型的性能。对每种材料在三种不同粒度分布的两种不同载荷水平下的断裂进行了研究。采用同一荷载水平下的同一粒径分布来识别每种材料的接触律参数，采用单粒破碎试验来识别断裂力模型参数。采用新断裂力模型的DEM模型与实验观察到的宏观力学行为吻合较好，与实验所得断裂结果的相关性最高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials and Structures 工程技术-材料科学：综合

CiteScore

6.40

自引率

7.90%

发文量

222

审稿时长

5.9 months

期刊介绍： Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.