Acoustic emission characterization of mode I fracture in asphalt mixtures at intermediate temperatures

IF 5.6 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-09-30 DOI:10.1016/j.tafmec.2025.105271

Weimin Song , Wenlong Yan , Hao Wu , Yuxuan Sun , Xiaobao Chen , Zhiqiang Cheng , De Zhang

{"title":"Acoustic emission characterization of mode I fracture in asphalt mixtures at intermediate temperatures","authors":"Weimin Song , Wenlong Yan , Hao Wu , Yuxuan Sun , Xiaobao Chen , Zhiqiang Cheng , De Zhang","doi":"10.1016/j.tafmec.2025.105271","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigated the Mode I fracture behavior of AC10 and AC16 asphalt mixtures at intermediate temperatures (10 °C and 25 °C) utilizing semi-circular bending (SCB) tests coupled with acoustic emission (AE) monitoring. Analysis of key parameters—fracture energy, equivalent stress intensity factor (<em>K</em><sub><em>IC</em></sub>*), and AE-derived cumulative energy/count—revealed that AC10 exhibited significantly higher <em>K</em><sub><em>IC</em></sub>* and fracture energy than AC16, indicating superior resistance to both pre- and post-region cracking. Concomitantly, cumulative AE energy and count delineated three distinct damage stages: Stage I involves micro/meso-crack development and void closure; Stage II features alternating plateaus and sharp growth points with rapid parameter increases, reflecting accelerated damage; Stage III marks rapid failure with inapparent growth of the cumulative count and energy. Load ratio analysis further demonstrated AC10's higher initiation load-to-peak load ratio and lower failure load-to-peak load ratio versus AC16, signifying slower damage propagation and better fracture resistance. Crack classification via a Gaussian mixture model (GMM) applied to RA-AF data confirmed that tensile cracks are dominant, with AC10 exhibiting a greater proportion of tensile cracks than AC16 at equivalent temperatures. Collectively, these results underscore the significant influence of mixture composition on fracture mechanics and AE response, providing critical insights for optimizing asphalt design to enhance intermediate-temperature cracking resistance.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105271"},"PeriodicalIF":5.6000,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Theoretical and Applied Fracture Mechanics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S016784422500429X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

This study investigated the Mode I fracture behavior of AC10 and AC16 asphalt mixtures at intermediate temperatures (10 °C and 25 °C) utilizing semi-circular bending (SCB) tests coupled with acoustic emission (AE) monitoring. Analysis of key parameters—fracture energy, equivalent stress intensity factor (K_IC*), and AE-derived cumulative energy/count—revealed that AC10 exhibited significantly higher K_IC* and fracture energy than AC16, indicating superior resistance to both pre- and post-region cracking. Concomitantly, cumulative AE energy and count delineated three distinct damage stages: Stage I involves micro/meso-crack development and void closure; Stage II features alternating plateaus and sharp growth points with rapid parameter increases, reflecting accelerated damage; Stage III marks rapid failure with inapparent growth of the cumulative count and energy. Load ratio analysis further demonstrated AC10's higher initiation load-to-peak load ratio and lower failure load-to-peak load ratio versus AC16, signifying slower damage propagation and better fracture resistance. Crack classification via a Gaussian mixture model (GMM) applied to RA-AF data confirmed that tensile cracks are dominant, with AC10 exhibiting a greater proportion of tensile cracks than AC16 at equivalent temperatures. Collectively, these results underscore the significant influence of mixture composition on fracture mechanics and AE response, providing critical insights for optimizing asphalt design to enhance intermediate-temperature cracking resistance.

查看原文本刊更多论文

中等温度下沥青混合料I型裂缝的声发射表征

本研究利用半圆弯曲（SCB）试验和声发射（AE）监测，研究了AC10和AC16沥青混合料在中温（10°C和25°C）下的I型断裂行为。关键参数断裂能、等效应力强度因子（KIC*）和ae推导的累积能量/计数分析表明，AC10的KIC*和断裂能明显高于AC16，表明AC16具有更强的抗区域前和区域后开裂能力。与此同时，累积声发射能量和计数描述了三个不同的损伤阶段：第一阶段涉及微/细观裂纹发展和空隙闭合；第二阶段为交替的平台期和急剧的生长期，参数快速增加，反映了加速的损伤；第三阶段标志着快速失效，累积计数和能量的增长不明显。载荷比分析进一步表明，与AC16相比，AC10具有更高的起始载荷-峰值载荷比和更低的失效载荷-峰值载荷比，表明其损伤扩展更慢，抗断裂性能更好。通过应用于RA-AF数据的高斯混合模型（GMM）进行裂纹分类，证实了拉伸裂纹占主导地位，在等效温度下，AC10比AC16显示出更大比例的拉伸裂纹。总的来说，这些结果强调了混合料组成对断裂力学和声发射响应的显著影响，为优化沥青设计以提高中温抗裂性提供了重要见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.