Engineering Fracture Mechanics最新文献

A generalised framework for phase field-based modelling of coupled problems: Application to thermo-mechanical fracture, hydraulic fracture, hydrogen embrittlement and corrosion 耦合问题相场建模的广义框架：在热机械断裂、水力断裂、氢脆和腐蚀中的应用

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-10 DOI: 10.1016/j.engfracmech.2025.111363

Yousef Navidtehrani , Covadonga Betegón , Emilio Martínez-Pañeda

{"title":"A generalised framework for phase field-based modelling of coupled problems: Application to thermo-mechanical fracture, hydraulic fracture, hydrogen embrittlement and corrosion","authors":"Yousef Navidtehrani , Covadonga Betegón , Emilio Martínez-Pañeda","doi":"10.1016/j.engfracmech.2025.111363","DOIUrl":"10.1016/j.engfracmech.2025.111363","url":null,"abstract":"<div><div>We present a novel, generalised formulation to treat coupled structural integrity problems by combining phase field and multi-physics modelling. The approach exploits the versatility of the heat transfer equation and is therefore well suited to be adopted in commercial finite element packages, requiring only integration point-level implementation. This aspect is demonstrated here by implementing coupled, multi-variable phenomena through simple <span>UMAT</span> and <span>UMATHT</span> subroutines in the finite element package <span>Abaqus</span>. The generalised theoretical and computational framework presented is particularised to four problems of engineering and scientific relevance: thermo-mechanical fracture, hydraulic fracture, hydrogen-assisted cracking and metallic corrosion. 2D and 3D problems are considered. The results reveal a very good agreement with experimental data, and existing numerical and analytical solutions. The user subroutines developed are made freely available at <span><span>https://mechmat.web.ox.ac.uk/codes</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111363"},"PeriodicalIF":4.7,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A COMSOL simulation of fracture-stress-seepage coupling during extremely thick coal seam mining 特厚煤层开采裂隙-应力-渗流耦合的COMSOL模拟

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-09 DOI: 10.1016/j.engfracmech.2025.111407

Risheng Zhuo , Pengxiang Zhao , Xueyang Sun , Shugang Li , Hui Liu , Yongyong Jia , Laolao Wang , Yuanjia Liu

{"title":"A COMSOL simulation of fracture-stress-seepage coupling during extremely thick coal seam mining","authors":"Risheng Zhuo , Pengxiang Zhao , Xueyang Sun , Shugang Li , Hui Liu , Yongyong Jia , Laolao Wang , Yuanjia Liu","doi":"10.1016/j.engfracmech.2025.111407","DOIUrl":"10.1016/j.engfracmech.2025.111407","url":null,"abstract":"<div><div>The law of seepage field evolution of mining overlying rock is complicated, and it plays a key role in controlling the migration and storage of pressure relief gas. To explore the evolution law of the seepage field under the conditions of extremely thick coal seam (ETCS) comprehensive mining, the Liuhuanggou coal mine in Xinjiang Province was selected for study. A similar simulation experiment was carried out for the collapse of the overlying rock at ETCS. The development of “cooling tower” distribution characteristics of mining cracks is elucidated. We used the mining fissure network, qualitative analyses, and COMSOL Multiphysics numerical simulation software to investigate the evolution characteristics of the pressure relief gas migration and storage area, as well as the evolution law of gas seepage in the ETCS. We also conducted a three-dimensional gas extraction field test to verify the results. The results indicate that the distribution pattern of the seepage field in the extraction zone exhibits a “cooling tower” pattern, characterized by a wide bottom and a narrow middle. And pressure relief gas is mainly distributed on both sides of the mining area. In addition, the gas pressure in the quarry increases and then decreases with an increase in height. Based on the relationship between the evolution characteristics of the seepage field in the mining fissure and gas migration and storage, the asymmetric evolution mechanism of the gas-high seepage zone is revealed, and the permeability zoning control equation is established. The magnificent effect of gas extraction in the field ensures the green, safe, and efficient mining of the working face. The study’s results establish a theoretical basis for precise gas extraction in ETCS and offer a fresh outlook on GHG management, with the goal of enhancing gas extraction and achieving safe and efficient mining in ETCS.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111407"},"PeriodicalIF":4.7,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface integrity and low cycle fatigue behavior of Ni-based single-crystal film cooling holes processed by ECM, EDM and PLM ECM、EDM和PLM加工镍基单晶膜冷却孔的表面完整性和低周疲劳行为

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-09 DOI: 10.1016/j.engfracmech.2025.111378

Zhenwei Li , Cheng Wang , Zhixun Wen , Zhufeng Yue

{"title":"Surface integrity and low cycle fatigue behavior of Ni-based single-crystal film cooling holes processed by ECM, EDM and PLM","authors":"Zhenwei Li , Cheng Wang , Zhixun Wen , Zhufeng Yue","doi":"10.1016/j.engfracmech.2025.111378","DOIUrl":"10.1016/j.engfracmech.2025.111378","url":null,"abstract":"<div><div>Surface integrity and low cycle fatigue (LCF) behavior of Ni-based single crystal film cooling hole (FCH) structures manufactured via three different processes—Electrochemical Machining (ECM), Electrical Discharge Machining (EDM), and Picosecond Laser Machining (PLM)—were investigated at high temperature. The surface integrity resulting from different drilling methods was analyzed across three aspects: geometry, metallurgy and roughness. Experimental results indicate that the LCF lifetime is significantly influenced by the drilling processes, with the order being <em>N</em><sub>ECM</sub> > <em>N</em><sub>EDM</sub> > <em>N</em><sub>PLM</sub>. In addition, while the drilling process minimally impacts the macroscopic fracture path and fracture morphology, it greatly influences the microstructural evolution near the cracks around the FCHs. Utilizing geometric reconstruction modeling, the crystal plasticity finite element method (CPFEM) was performed for three kinds of FCH model. The maximum resolved shear stress (RSS) around the three FCH models is mainly affected by surface integrity, with the order being RSS<sub>ECM</sub> > RSS<sub>EDM</sub> > RSS<sub>PLM</sub>. Moreover, the fatigue damage distribution locations in all FCH models align well with the fatigue crack nucleation position observed in experiments. The fatigue life simulated using the damage evolution law falls within the error bands of ±2 times.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111378"},"PeriodicalIF":4.7,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mixed-mode I/II fracture and crack propagation characteristics of granite after thermal shock cycles: An integrated DIC and CPG investigation 热冲击循环后花岗岩I/II混合模式断裂和裂纹扩展特征：DIC和CPG综合研究

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-08 DOI: 10.1016/j.engfracmech.2025.111390

Lei Weng , Jingyu Wang , Zhijun Wu , Qiang Guo , Qiuhong Wu , Zhaofei Chu , Quansheng Liu

{"title":"Mixed-mode I/II fracture and crack propagation characteristics of granite after thermal shock cycles: An integrated DIC and CPG investigation","authors":"Lei Weng , Jingyu Wang , Zhijun Wu , Qiang Guo , Qiuhong Wu , Zhaofei Chu , Quansheng Liu","doi":"10.1016/j.engfracmech.2025.111390","DOIUrl":"10.1016/j.engfracmech.2025.111390","url":null,"abstract":"<div><div>The fracture behaviors of reservoir rocks following thermal shock cycles are critical to the stability and heat extraction efficiency of enhanced geothermal system. In this study, notched semi-circular bend (NSCB) granite specimens with varying prefabricated crack angles were subjected to multiple thermal shock cycles. Subsequently, three-point bending tests were conducted, employing digital image correlation (DIC) technique and crack propagation gauge (CPG) measurement. The variations in mixed-mode I/II fracture toughness, fracture process zone (FPZ) length and crack propagation velocity with respect to the number of thermal shock cycles were deeply studied. The experimental results reveal that both the fracture toughness and maximum FPZ length decrease with an increasing number of thermal shock cycles and larger prefabricated crack angle. A strong positive linear correlation is observed between the maximum FPZ length and mixed-mode fracture toughness. Additionally, the average crack propagation velocity exhibits a marked exponential decay with an increasing number of thermal shock cycles. Detailed fracture surface observations indicate that the deviation between the actual crack propagation path and the theoretical trajectory increases significantly as thermal shock cycles accumulate. Furthermore, a larger prefabricated crack angle corresponds to a decrease in average crack propagation velocity. The deterioration of granite upon thermal shock cycles is attributed to the combined effects of repeated thermal-induced damage, water quenching and water-induced weakening mechanisms.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111390"},"PeriodicalIF":4.7,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of grain boundaries on the fracture behavior of polycrystalline electrode materials: a chemo-mechanical phase field model 晶界对多晶电极材料断裂行为的影响：化学-力学相场模型

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-06 DOI: 10.1016/j.engfracmech.2025.111389

Yisen Peng , Feng Hao

{"title":"Impact of grain boundaries on the fracture behavior of polycrystalline electrode materials: a chemo-mechanical phase field model","authors":"Yisen Peng , Feng Hao","doi":"10.1016/j.engfracmech.2025.111389","DOIUrl":"10.1016/j.engfracmech.2025.111389","url":null,"abstract":"<div><div>Grain boundaries play a dominant role in Li<sup>+</sup> transport and mechanical deformation of polycrystalline electrode materials. Herein, a chemo-mechanical phase field model is developed to investigate the effects of grain boundary on chemo-mechanical responses in lithium batteries. It is demonstrated that grain boundaries with high diffusion coefficients provide a fast pathway for the Li<sup>+</sup> transport, which alleviates the nucleation of inter- and intra-granular fracture while accelerates crack propagation through the particle center. Grain boundaries with low diffusion coefficients hinder the Li<sup>+</sup> transport between grains, which leads to crack mainly initiated in the outer layer of electrode particles. Improving grain boundary fracture toughness is efficient for alleviating inter-granular fracture. Interestingly, high grain boundary fracture toughness even hinders crack propagation along grain boundaries but has no effect on the total damage of the particle. For high rate operation of batteries, increasing grain boundary fracture toughness is more significant to mitigate inter-granular fracture. This fundamental study provides insights into the multi-physical behavior of polycrystalline electrodes with various chemical and mechanical properties of grain boundaries.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111389"},"PeriodicalIF":4.7,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Translaminar fracture toughness of carbon fibre reinforced polymer composite laminates with cross-ply configuration under biaxial tensile loading 碳纤维增强聚合物复合材料层合板在双向拉伸载荷下的跨层断裂韧性

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-05 DOI: 10.1016/j.engfracmech.2025.111386

Yajing Feng , Jingyu Wang , Youcun Zhao , Longfei Cheng , Ting Zhang , Hao Cui

引用次数: 0

Inverse engineering based analytical and numerical prediction on ductile fracture for AZ60M magnesium alloy under wide stress triaxiality 基于逆工程的AZ60M镁合金宽应力三轴韧性断裂分析与数值预测

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-05 DOI: 10.1016/j.engfracmech.2025.111384

Ashiq Iqbal Chowdhury , Thamer Sami Alhalaybeh , Liucheng Zhou , Xiaoqing Liang , Yanshan Lou

{"title":"Inverse engineering based analytical and numerical prediction on ductile fracture for AZ60M magnesium alloy under wide stress triaxiality","authors":"Ashiq Iqbal Chowdhury , Thamer Sami Alhalaybeh , Liucheng Zhou , Xiaoqing Liang , Yanshan Lou","doi":"10.1016/j.engfracmech.2025.111384","DOIUrl":"10.1016/j.engfracmech.2025.111384","url":null,"abstract":"<div><div>The lightweight automotive and construction industries increasingly rely on magnesium (Mg) alloy structural components as they have the potential to enhance service performance and enable cost-effective manufacturing. However, the extrusion of Mg alloys presents significant challenges, primarily due to their limited formability and the strong crystallographic textures that develop during extrusion. This study investigates the influence of the fracture behavior of AZ60M Mg alloy bars under different stress states, employing several uncoupled damage criteria to enable reliable ductile failure predictions. Tensile and compression tests were conducted using AZ60M specimens of varying geometries and dimensions, revealing distinct deformation scenarios, stress–strain relationships, and fracture forms. Digital Image Correlation technology was employed to capture detailed deformation behavior under diverse stress triaxialities across the extrusion loading direction. Initially, finite element models were developed for each specimen and then optimized using an experiment-based inverse engineering approach, through which the fracture strains were derived by correlating simulation results with experimental data. Additionally, plastic deformation behavior was accurately simulated using the Swift-Voce hardening law. Finally, the Rice-Tracey, DF2014, and DF2016 fracture criteria were calibrated using the experimental data, with the DF2016 model showing superior predictive performance. These findings provide valuable insights for improving the formability and ductile failure prediction of Mg alloys, which is critical for their broader application in lightweight structural components.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111384"},"PeriodicalIF":4.7,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of rapid tempering and cementite morphology on hydrogen diffusion and trapping in a medium-carbon advanced high-strength steel 快速回火和渗碳体形态对中碳高级高强钢中氢扩散和俘获的影响

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-04 DOI: 10.1016/j.engfracmech.2025.111376

Renata Latypova , Vahid Javaheri , Lisa Claeys , Kim Verbeken , Tom Depover , Jukka Kömi , Sakari Pallaspuro

{"title":"Effect of rapid tempering and cementite morphology on hydrogen diffusion and trapping in a medium-carbon advanced high-strength steel","authors":"Renata Latypova , Vahid Javaheri , Lisa Claeys , Kim Verbeken , Tom Depover , Jukka Kömi , Sakari Pallaspuro","doi":"10.1016/j.engfracmech.2025.111376","DOIUrl":"10.1016/j.engfracmech.2025.111376","url":null,"abstract":"<div><div>Microstructural changes during the tempering of carbon steels can influence their interaction with hydrogen (H) in several manners, and novel heat treatments could aid in reducing susceptibility to hydrogen embrittlement. Here, the effect of rapid tempering (RT) on H diffusion and trapping was investigated in a direct-quenched (DQ) medium-carbon steel and its tempered variants, T420 (RT at 420 °C) and T720 (RT at 720 °C). RT reduces RA fraction, dislocation density, microstrain, and low-angle grain boundary surface area while increasing the cementite fraction and modifying its morphology, resulting in mainly rod-like cementite in T420, and a higher fraction of globular cementite in T720. Electrochemical H permeation and thermal desorption spectroscopy were used to evaluate H diffusion coefficients (D) and trapping behaviour. DQ and T420 exhibit similar D, while T720 shows significantly faster diffusion, with an inverse correlation to H content. Cementite acts as a weak H trap, showing increased trapping with increasing interface area for rod-like cementite.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111376"},"PeriodicalIF":4.7,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144570550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fragmentation characteristics and energy components of non-cylindrical rock specimens in a novel collision system 一种新型碰撞系统中非圆柱形岩石试样的破碎特性和能量分量

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-04 DOI: 10.1016/j.engfracmech.2025.111381

Zong-Xian Zhang , Liyuan Chi , Zida Liu , Toochukwu Ozoji , Wuxing Wu , Chen Huang , Xianbo Guan

{"title":"Fragmentation characteristics and energy components of non-cylindrical rock specimens in a novel collision system","authors":"Zong-Xian Zhang , Liyuan Chi , Zida Liu , Toochukwu Ozoji , Wuxing Wu , Chen Huang , Xianbo Guan","doi":"10.1016/j.engfracmech.2025.111381","DOIUrl":"10.1016/j.engfracmech.2025.111381","url":null,"abstract":"<div><div>This paper presents the results of rock fragmentation by using a new collision method we reported earlier. Since the method has been proved to be successful for cylindrical rock specimens in our earlier papers, this paper presents the results from 28 non-cylindrical rock specimens such as half-cylinders and half-discs. The results show that: (1) all rock specimens were successfully released at a flight velocity of 13.7 – 62.5 m/s, validated the method for non-cylindrical specimens. (2) All specimens were broken into various sizes of fragments (particles). (3) The energy transferred to the transmitted bar was in a range of 0.3 – 3.4 % of input energy. (4) The translational kinetic energy of rock specimen was in a range of 0.1 – 18.9 % of input energy, while the rotational kinetic energy of rock specimen was 3.3 –5.1 % of input energy. (6) The specific input energy (input energy per unit volume of rock) varied from 0.26 to 5.06 MJ/m<sup>3</sup>. (7) The main factors influencing rock fragmentation include specific input energy, rock impedance and foliations. Larger specific input energy or smaller impedance resulted in better fragmentation, and vice versa. Foliations, especially parallel ones, made spalling occurred in most quartzite specimens as well as a few other rock specimens before they collided with the transmitted bar. Assuming that relative energy efficiency is equal to the ratio of the energy absorbed by rock to the input energy, the paper finds that the relative energy efficiency of the rock collision method is much higher than the relative energy efficiencies of dynamic rock compression, dynamic rock fracture, and ore grinding in ball mills, indicating a great potential of applying the collision method to mining industry.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111381"},"PeriodicalIF":4.7,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144570551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Acoustic emission-based identification and interfacial fiber bridging and delamination damage mechanisms in twill/unidirectional composite materials 基于声发射的斜纹/单向复合材料界面纤维桥接与分层损伤机理研究

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-03 DOI: 10.1016/j.engfracmech.2025.111379

Zhipeng Yao , Ben Wang , Di Gai , Shengjie Yu , Shiyu Yang

{"title":"Acoustic emission-based identification and interfacial fiber bridging and delamination damage mechanisms in twill/unidirectional composite materials","authors":"Zhipeng Yao , Ben Wang , Di Gai , Shengjie Yu , Shiyu Yang","doi":"10.1016/j.engfracmech.2025.111379","DOIUrl":"10.1016/j.engfracmech.2025.111379","url":null,"abstract":"<div><div>Interlaminar damage in carbon fiber reinforced polymer (CFRP) laminates is a common form of damage in engineering applications, with interlaminar fracture toughness commonly used to characterize its ability to resist crack propagation. In double cantilever beam (DCB) tests of CFRP laminates, the intensity of fiber bridging phenomena depends on the structure and orientation of fibers on either side of the delamination. To further elucidate the mechanism of fiber bridging phenomena in delamination crack propagation, DCB specimens with pre-fabricated cracks on either side composed of twill-weave (TW) fiber layers and unidirectional (UD) fiber layers were employed to study the delamination behavior of two fiber orientations. An unsupervised k-means clustering algorithm was employed for identifying damage modes from acoustic emission(AE) signals under different failure modes, and the relationship between the interlaminar fracture toughness of the specimens and interlaminar micro-damage was analyzed. Scanning electron microscopy (SEM) was used to reveal the micro-mechanisms of damage. The results indicate that the trend of interlaminar fracture toughness of the specimens is positively correlated with the peak amplitude of AE signals. Cluster analysis categorizes AE signals into matrix damage (including matrix cracking, interface debonding, and fiber pull-out) and fiber bridging damage (fiber breakage). Cluster analysis revealed that differences in interlaminar fracture toughness among interfaces stem from varying matrix fracture modes. Acoustic AE technology was used to distinguish the lamination mechanism between specimens from micro and macro perspectives, which provides an important basis for determining the mechanical properties of composite laminates.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111379"},"PeriodicalIF":4.7,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144570549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0