L. Ma, B.Y. Huang, F. Guo, X.M. Li, J.F. Cao, X.H. Zhang
{"title":"Research on the mechanical behavior of high-speed railway gear steel 20CrNi2Mo: Experimental and theoretical investigation","authors":"L. Ma, B.Y. Huang, F. Guo, X.M. Li, J.F. Cao, X.H. Zhang","doi":"10.1016/j.engfailanal.2025.109533","DOIUrl":"10.1016/j.engfailanal.2025.109533","url":null,"abstract":"<div><div>Gears are key components in the transmission system of high-speed railway trains, and their reliability is critical for the safe operation of trains. This study investigates the commonly used high-speed railway gear steel, 20CrNi2Mo, through systematic experimental and theoretical analysis. Based on the experimental results, it was found that the viscous effects of 20CrNi2Mo steel can be neglected, while the material exhibits significant changes in the hysteresis loop shape under cyclic loading. As the number of loading cycles increases, the hysteresis loop gradually becomes shorter and wider. Even when the applied stress is below the yield limit, initial deformation is primarily elastic, but plastic deformation and hysteresis loops develop over time. This phenomenon demonstrates a gradual reduction in the yield stress of the material under identical loading conditions, accompanied by a decline in elastic modulus. It further elucidates the evolution mechanism from elastic deformation to plastic failure during the fatigue process. Based on these experimental findings, the proposed constitutive model integrates improved fatigue damage evolution laws and coupling methods, incorporating elastic modulus and yield stress as damage factors. This model effectively explains material softening, hysteresis loop rotation, and widening observed during the fatigue process. Simulation results confirm that the model accurately captures the mechanical behavior at each stage of fatigue, with predicted life expectancy closely aligning with experimental outcomes. These findings provide a solid theoretical foundation and valuable reference for the failure analysis of gear transmission.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109533"},"PeriodicalIF":4.4,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739292","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}
{"title":"A physics-informed framework for feature extraction and defect segmentation in pulsed infrared thermography","authors":"Luca Santoro, Raffaella Sesana","doi":"10.1016/j.engfailanal.2025.109542","DOIUrl":"10.1016/j.engfailanal.2025.109542","url":null,"abstract":"<div><div>This paper presents a robust and interpretable methodology for defect detection in active infrared thermography data applied to polyvinyl chloride (PVC) specimens. Our approach integrates a physics-based cooling model to describe the transient thermal response of each pixel, from which five primary temporal features are extracted via least-squares fitting. These features are then enriched with local spatial statistics through neighborhood-based computations, resulting in a 15-dimensional descriptor per pixel. The resulting feature set is used to train a random forest classifier, which achieves high overall accuracy (99.3%), competitive intersection-over-union (0.705), and an outstanding ROC AUC (0.998). In contrast to deep encoder–decoder networks that require extensive computational resources and large annotated datasets, the proposed pipeline offers enhanced interpretability and significantly reduced computational overhead. Comparative analysis with state-of-the-art deep learning models, such as those reported in Wei et al., (2023), demonstrates that our approach achieves similar performance while providing a transparent insight into the contribution of each feature. The proposed method is especially suitable for engineering failure analysis where model transparency, rapid evaluation, and integration into existing inspection protocols are critical. Future work will extend the framework to accommodate a broader range of defect types and material systems, aiming to further enhance industrial applicability and diagnostic reliability.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109542"},"PeriodicalIF":4.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Failure analysis of a torsion spring: A microstructural and finite element assessment","authors":"Raj Shinde , Mahesh N Pradhan , Baidehish Sahoo , Reliance Jain","doi":"10.1016/j.engfailanal.2025.109560","DOIUrl":"10.1016/j.engfailanal.2025.109560","url":null,"abstract":"<div><div>This study explores the premature failure of a torsion spring manufactured from cold-drawn stainless-steel wire. A comprehensive analysis was conducted which included microstructural examination through Optical microscope, FE-SEM, and XRD. The analysis of the fractured surface through Optical microscope & FE-SEM revealed the inclusions, precipitates and porosity. The high dislocation density and residual stress were revealed by the XRD analysis. The mechanical characterization was evaluated through Vickers hardness testing where the fractured surface came up with higher values compared to that of the as-received one. Finite element assessment carried out to understand the stress distribution in the spring. The FEA simulation results corresponded well with the actual failure zones. In conclusion, the investigation indicated that the failure was due to material flaws and stress concentration folds in design.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109560"},"PeriodicalIF":4.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715477","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}
{"title":"Development of novel auxetic-nonauxetic hybrid metamaterial","authors":"Hasan Al-Rifaie , Nima Movahedi , Teik-Cheng Lim","doi":"10.1016/j.engfailanal.2025.109559","DOIUrl":"10.1016/j.engfailanal.2025.109559","url":null,"abstract":"<div><div>Cellular metamaterials with positive PR (non-auxetic) and negative PR (auxetic) have been well covered in literature. However, to author’s knowledge, topologies with zero PR is limited to few studies, although they have higher impact energy absorption potential compared to conventional auxetic and nonauxetic topologies. Hence, the aim of this paper is to propose a new hybrid topology that combines auxetic and non-auxetic nature, achieving near zero PR. An analytical approach was employed to analyze considered geometries. A non-linear computational model was then developed using Abaqus software to investigate their behavior under dynamic impact. The hybrid topologies showed a mix between the X-shaped progressive collapse of the uniform non-auxetic honeycomb and the lateral shrinkage of the uniform auxetic re-entrant. The hybrid topologies outperformed conventional auxetic and nonauxetic topologies with higher Specific Energy Absorption (SEA), showing superior performance when subjected to dynamic impact. The proposed sacrificial hybrid cellular metamaterial can be used in different scales to protect civil and defense vulnerable structures.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109559"},"PeriodicalIF":4.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783925","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}
Jiayao Chen , Zhongwen Yue , Wei Liu , Peng Wang , Kejun Xue , Qingyu Jin , Meng Ren , Huaqiang Liu
{"title":"Impact-induced failure and mechanical response of rapidly solidified sealing materials for blast holes","authors":"Jiayao Chen , Zhongwen Yue , Wei Liu , Peng Wang , Kejun Xue , Qingyu Jin , Meng Ren , Huaqiang Liu","doi":"10.1016/j.engfailanal.2025.109552","DOIUrl":"10.1016/j.engfailanal.2025.109552","url":null,"abstract":"<div><div>This study addresses the challenge of inadequate hole sealing in the drill-and-blast method, which often results in suboptimal blasting performance, by investigating the development and mechanical behavior of sealing materials through theoretical analysis and laboratory testing. First, the formation mechanism of caliche is analyzed, leading to the creation of a stable, fast-setting single-slurry sealing material suitable for pumping applications. Second, a dynamic friction strength model is developed to characterize the sealing performance of the material, based on principles of material and friction mechanics. Furthermore, key factors influencing sealing strength are systematically identified. Finally, the mechanical response of the materials is evaluated under various conditions using static compression tests and Split Hopkinson Pressure Bar (SHPB) impact tests, offering a systematic framework for evaluating the material’s behavior under both quasi-static and high strain-rate conditions. The results indicate that sealing length has a more pronounced effect on sealing properties than the material’s age. Furthermore, as impact air pressure increases, the sealing material undergoes a failure transition from brittle fracture to plastic deformation, demonstrating enhanced damage resistance under high strain rate conditions. This study also reveals previously unquantified effects of sealing length and impact loading on failure behavior, providing new insights into the material’s dynamic failure resistance and sealing efficiency optimization. These findings not only enhance the sealing quality of blast holes but also provide valuable insights into mechanized sealing technology, offering significant implications for engineering applications.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109552"},"PeriodicalIF":4.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705332","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}
Chao Bao , Huan Long , Xiaotong Ma , Ibrahim M.H. Alshaikh , Galal Al-Mekhlafi , Luyuan Peng , Huxiang Wang
{"title":"Experimental study on progressive collapse resistance of corroded RC continuous deep flexural members","authors":"Chao Bao , Huan Long , Xiaotong Ma , Ibrahim M.H. Alshaikh , Galal Al-Mekhlafi , Luyuan Peng , Huxiang Wang","doi":"10.1016/j.engfailanal.2025.109543","DOIUrl":"10.1016/j.engfailanal.2025.109543","url":null,"abstract":"<div><div>Abnormal loads can induce localized damage, potentially triggering the progressive collapse of reinforced concrete (RC) structures, leading to casualty and severe economic loss. In coastal or high-salinity environments, harsh conditions accelerate structural degradation, compromising resistance to progressive collapse, primarily due to reinforcing bar corrosion caused by chloride infiltration. To investigate the impact of corrosive environments on the progressive collapse resistance of RC continuous deep flexural members, quasi-static testing was conducted on four scaled-down RC substructure specimens. Besides one control group specimen, the remaining three specimens underwent electrochemically accelerated corrosion at 3%, 9%, and 12% across the entire specimen area, respectively. Failure modes and internal force were analyzed and compared. The results show that damage in both corroded and uncorroded specimens was concentrated in the plastic hinge regions near the beam ends. Reinforcing bar corrosion significantly affected the compression arch mechanism and the catenary mechanism, reducing the bearing capacities of these two mechanisms by up to 12.0% and 16.0%, respectively.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109543"},"PeriodicalIF":4.4,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715478","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}
{"title":"A perspective on the structural integrity of notched components through the Effective Critical Plane approach","authors":"F. Frendo, A. Chiocca, M. Sgamma","doi":"10.1016/j.engfailanal.2025.109517","DOIUrl":"10.1016/j.engfailanal.2025.109517","url":null,"abstract":"<div><div>Fatigue-induced damage is a significant concern for components in various industries, often leading to unexpected failures during service. Multiaxial fatigue assessment methods, particularly Critical Plane (CP) methodologies, have been widely used to identify critical regions and predict crack initiation sites. However, traditional CP approaches require computational intensive plane scanning techniques, which becomes impractical for components with complex geometries or unknown critical areas. This study builds upon recent developments in CP factor efficient evaluation and, in particular, on the Effective Critical Plane (ECP) approach recently proposed by the authors, which prescribes a stress averaging over a small control volume centred on the critical location, before evaluating the CP factor. The radius of the control volume is a material parameter and the stress averaging is intended to introduce the original idea of the microstructural support of Neuber. The influence of stress averaging on the critical plane orientation is analysed in this work in order to show that the ECP approach not only reduces computational complexity, but also preserves the critical plane orientation and, as a result, the CP theoretical foundation. The work was carried out by several FE simulations, considering a structural steel and different notched components under complex loading scenarios. The control radius for the selected material was determined by a preliminary experimental investigation.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109517"},"PeriodicalIF":4.4,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681993","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}
Johannes Rosenberger , Johannes Tlatlik , Nils Rump , Sebastian Münstermann
{"title":"Prediction of statistical force–displacement curves of Charpy-V impact tests based on unsupervised fracture surface machine learning","authors":"Johannes Rosenberger , Johannes Tlatlik , Nils Rump , Sebastian Münstermann","doi":"10.1016/j.engfailanal.2025.109551","DOIUrl":"10.1016/j.engfailanal.2025.109551","url":null,"abstract":"<div><div>While conventional pendulum impact tests only measure a material’s integral energy absorption, the instrumented version of the test provides valuable additional insights by extracting force–displacement behaviour of the loaded specimen. The latter, however, requires auxiliary testing equipment, calibration procedures and evaluation methods. Therefore, this study aims to predict force–displacement behaviour of instrumented Charpy impact tests solely on the basis of analyzing images of specimen fracture surfaces postmortem. This is explored and achieved by using unsupervised machine learning techniques for computer vision. By using unsupervised computer vision on fracture images from 4 steels, we assess the feasibility of classifying fracture surfaces and deriving statistical force–displacement curves and provide crucial interpretability of the model’s decision making. The results indicate the model’s ability to learn the necessary representations without the need of supervision. The unsupervised model can extract significant insights from fracture images alone, supporting efficient, accurate, and interpretable materials testing, where confidence intervals of 97 % can already be met for the upper shelf. This allows detailed information about the mechanical behaviour of the material to be obtained from non-instrumented tests.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"175 ","pages":"Article 109551"},"PeriodicalIF":4.4,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nima Valizade , George Jarjoura , Georges J. Kipouros , Kevin Plucknett , Sajad Shakerin , Mohsen Mohammadi
{"title":"Microstructure, hardness, and tribological properties of AA2014 powder metallurgy alloys: A sizing mechanical surface treatment study","authors":"Nima Valizade , George Jarjoura , Georges J. Kipouros , Kevin Plucknett , Sajad Shakerin , Mohsen Mohammadi","doi":"10.1016/j.engfailanal.2025.109550","DOIUrl":"10.1016/j.engfailanal.2025.109550","url":null,"abstract":"<div><div>This study explores the influence of sizing mechanical surface treatment on the tribological response of AA2014 powder metallurgy (PM) alloy-steel tribosystem under reciprocating sliding wear. The impact of sizing pressure on wear mechanisms is analyzed using a combination of X-ray diffraction (XRD), electron backscatter diffraction (EBSD), surface topography, hardness testing, wear rate measurements, and microscopic analyses. The results show that sizing treatment can significantly alter wear mechanisms, shifting from abrasion and mild oxidative wear to delamination and cracking, especially at lower sizing pressures. Samples sized at 200 MPa and 300 MPa displayed pronounced delamination and cracking. In contrast, increasing the sizing pressure to 400 MPa enhanced mechanical properties, reduced the wear rate, and minimized delamination. This suggests that although sizing with relatively low sizing pressure can increase hardness, it may detrimentally affect the alloy’s wear performance by intensifying stress concentration effect. However, wear properties benefit from the superior mechanical properties gained through cold working of the alloy at a higher pressure of 400 MPa. This research highlights the critical role of sizing pressure in optimizing the tribological performance of sized aluminum PM alloys.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"174 ","pages":"Article 109550"},"PeriodicalIF":4.4,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dong Liu , Lintao Li , Guoxing Li , Nannan Sun , Guixiang Zhu , Tie Wang , Fengshou Gu
{"title":"Cavitation failure analysis and mechanism study of the wet cylinder liner in heavy-duty diesel engines","authors":"Dong Liu , Lintao Li , Guoxing Li , Nannan Sun , Guixiang Zhu , Tie Wang , Fengshou Gu","doi":"10.1016/j.engfailanal.2025.109547","DOIUrl":"10.1016/j.engfailanal.2025.109547","url":null,"abstract":"<div><div>Cavitation failure of the cylinder liner is one of the main reliability problems in heavy-duty diesel engines. It can shorten engine lifespan, increase maintenance costs, and even lead to catastrophic failures. This paper conducts a systematic study of cylinder liner cavitation by integrating microstructure analysis, cavitation process observation, and numerical simulation. The morphology and chemical composition of the damaged regions are analysed at both macro and micro levels, providing comprehensive insights into the cavitation erosion behaviour and damage mechanisms. The vibration and pressure fluctuation characteristics of the cylinder liner-water jacket system are investigated by a structure-acoustic coupling model. The predicted cavitation risk regions of the cylinder liner are in good agreement with the actual cavitation erosion regions. Cavitation damage is primarily concentrated within a 26 mm vertical zone adjacent to the lower seal of the cylinder liner. The minimum pressure in the water jacket occurs at 373.3 °CA. When the engine speed exceeds 1400 rpm, the risk of cavitation arises and progressively intensifies with increasing speed and load. The results enrich the theoretical system of cavitation erosion in cylinder liners and provide a valuable reference for the cavitation prediction and mitigation.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"174 ","pages":"Article 109547"},"PeriodicalIF":4.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687757","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}