Theoretical and Applied Fracture Mechanics最新文献

{"title":"Mixed-mode I/II fracture criteria proposed for cracked orthotropic materials: A special overview on the efficiency of reinforced isotropic solid (RIS) model in enhancing predictive accuracy","authors":"Zahra Mazahebi,&nbsp;Mahdi Fakoor","doi":"10.1016/j.tafmec.2025.105247","DOIUrl":"10.1016/j.tafmec.2025.105247","url":null,"abstract":"<div><div>The assessment method for the residual strength and resistance of cracked orthotropic materials under in-plane tensile-shear loading involves the application of mixed-mode I/II fracture criteria specifically developed for these materials. In fracture mechanics, various criteria are used to analyze crack growth behavior and load-bearing capacity, which can be based on strength, stress, strain, or energy approaches. In this research an analytical review of mixed-mode I/II fracture criteria is performed to identify a suitable and superior criterion for predicting the fracture behavior of cracked orthotropic materials. Selecting an appropriate material model is essential, as it can significantly enhance the accuracy of the results. Given the critical importance of the chosen material model in analyzing crack propagation, this study explores the fracture criteria proposed for evaluating the fracture of cracked orthotropic materials, alongside a reinforced isotropic solid (RIS) model, which is recognized as a superior approach. The predicted fracture behavior for each criterion is compared using fracture limit curves to find the best alignment with experimental data. Additionally, this paper reviews a wide range of fracture criteria with various characteristics, including cases where the crack forms an arbitrary angle with respect to the fibers. It also considers the T-stress term, which significantly affects the crack propagation angle, as well as the damage zone at the crack tip and fracture resistance. The proposed optimal criterion will be identified based on the percentage of error in the fracture envelope curves compared to the available experimental data.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105247"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159182","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":"Analysis of interfacial crack propagation in inhomogeneous bi-materials under thermo-mechanical loading","authors":"Xinyao Guo ,&nbsp;Shuai Zhu ,&nbsp;Hongjun Yu ,&nbsp;Zhiyong Wang ,&nbsp;Zhihua Wang","doi":"10.1016/j.tafmec.2025.105262","DOIUrl":"10.1016/j.tafmec.2025.105262","url":null,"abstract":"<div><div>For the inhomogeneous bi-material structures and typical composites, the propagation behavior of interfacial cracks is significantly affected by discontinuities in material properties and simultaneous action of mechanical loading and temperature. Utilizing the interfacial crack propagation criterion, a numerical calculation framework combining the improved interaction integral and extended finite element method (XFEM) is established to investigate the complex interfacial crack propagation behaviors in thermo-mechanical service environments. The important fracture parameters including stress intensity factors (SIFs) and energy release rate (ERR) at the interfacial crack tip are accurately extracted by using the interaction integral without involving the material derivative. This method enables effective simulation of the propagation path and evolution of interfacial cracks without requiring avoidance of the material interface around the crack tip. By comparing the results with the extension tests of rock-concrete bi-material interfacial cracks in the literature, it is verified that it has high accuracy (error &lt; 2.5 %) in calculating the fracture coefficients at the crack tip and predicting the crack path. For bi-material plates containing interfacial cracks, the conservation of the interaction integral is firstly verified, and then the effects of temperature gradient near the interface, inhomogeneous material properties and crack geometrical configurations on the crack initiation and propagation paths are systematically explored. The numerical results show that the temperature field gradient has a significant effect on mode mixity thereby determining the competing mechanism of whether the crack is delaminated or deflected along the interface. In addition, the effects of the inclusion-to-substrate modulus ratio near the interfacial crack tip and the relative position of the inclusion to the interfacial crack tip on the crack propagation behavior are investigated in a particle composite. Finally, the effect of inclusion on crack propagation is affected by the distance and the stiffness ratio between the inclusion and the matrix, and that this effect has a certain threshold limit.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105262"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221507","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":"Effects of bedding properties on fracture behavior in shale with 3D bedding planes: Insights from DEM simulation","authors":"Mingzhi Jia ,&nbsp;Dongyang Wu ,&nbsp;Fan Feng ,&nbsp;Tao Zhang ,&nbsp;Shentao Geng","doi":"10.1016/j.tafmec.2025.105259","DOIUrl":"10.1016/j.tafmec.2025.105259","url":null,"abstract":"<div><div>The mechanical and spatial properties of bedding planes significantly affect shale fracture characteristics. To investigate the influence of bedding properties on the mode I fracture behavior of shale, numerical models with different bedding properties were developed based on experimental results. These models were employed to evaluate the influences of the bedding angle and tensile strength on the apparent fracture toughness (<em>AFT</em>), damage ratio, and crack distribution patterns. The angles <em>α</em> and <em>β</em> represent the horizontal projection angles of the bedding plane in the <em>x</em> and <em>y</em> directions, respectively. The results indicated that an increased tensile strength ratio (<em>TSR</em>) between the bedding and the matrix significantly enhanced the <em>AFT</em>, particularly when the bedding planes were subjected to tensile stress. Moreover, increased <em>TSR</em> values correlated with reduced propagation distances of microcrack in bedding planes, while increased bedding angle <em>β</em> significantly inhibited crack propagation. In addition, a higher <em>TSR</em> could inhibit the formation of secondary cracks in the bedding plane. Notably, there were significant differences in the damage ratio for different bedding angles, with the highest damage ratio observed for mixed failure. When the angles are <em>α</em> = 90°, and <em>β</em> = 30°, the damage ratio remains the highest under different <em>TSR</em>s. The results indicate that setting the fracturing direction relative to the bedding plane at <em>α</em> = 90° and <em>β</em> = 30° can promote mixed shale failure and significantly improve hydraulic fracturing efficiency.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105259"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145268357","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":"Study on the macro-micro mechanical behavior of freeze-thaw fissured sandstone under uniaxial compression","authors":"Guilei Song ,&nbsp;Deng Zhang ,&nbsp;Longxiao Chen ,&nbsp;Chuanxiao Liu ,&nbsp;Danyang Xiong","doi":"10.1016/j.tafmec.2025.105252","DOIUrl":"10.1016/j.tafmec.2025.105252","url":null,"abstract":"<div><div>Long-term freeze-thaw cycles in cold-region rock masses degrade their mechanical properties, significantly impacting engineering safety. This study investigates fissured sandstone using uniaxial compression test and discrete element numerical simulations to analyze the effects of freeze-thaw cycles, fissure dip, and water contents on mechanical parameters, acoustic emission characteristics, and cracks propagation. The macro-micro damage mechanisms of fissured sandstone subjected to freeze-thaw cycles are elucidated. The results indicate that the peak strength and apparent stiffness of fissured sandstone after freeze-thaw cycles reduce, with the degree of reduction decreasing the greater the fissure dip. Acoustic emission signals correlate with the cracks propagation process, and freeze-thaw cycles diminish the intensity of these signals during sandstone failure. Increasing fissure dip suppresses wing cracks development, enhances secondary cracks formation, and intensifies shear effects during failure. The failure mode of freeze-thaw fissured sandstone transitions progressively from tensile failure to tensile-shear failure, ultimately culminating in X-shaped conjugate shear failure as the fissure dip approaches 90°. In addition, the quantitative analysis using the Gray Relational Analysis identifies fissure dip as the primary factor affecting the mechanical properties of freeze-thaw fissured sandstone, followed by water content and the number of freeze-thaw cycles (within 20 cycles).</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105252"},"PeriodicalIF":5.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159181","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":"Study on the influence of non-homogeneous pore morphology on the extension path and mechanical properties of sandstone fractures","authors":"Long Chen ,&nbsp;Dezhong Kong ,&nbsp;Gaofeng Song ,&nbsp;Yujin Zuo ,&nbsp;Yuan Zhang ,&nbsp;Yang Zhou","doi":"10.1016/j.tafmec.2025.105243","DOIUrl":"10.1016/j.tafmec.2025.105243","url":null,"abstract":"<div><div>Sandstones in karst regions often form multi-scale non-homogeneous pores of different sizes and shapes due to dissolution, and their morphological differences lead to the complexity of fissure expansion paths, which affects the mechanical properties of the rock body. However, the quantitative relationship between pore geometries and fissure dynamics and strength deterioration is not clear, which limits accurate prediction of the stability of the rock body in karst regions. Therefore, in this study, the effects of different pore morphologies on the extension paths and mechanical properties of sandstone fractures were analyzed by theoretical analysis, uniaxial compression test, discrete element numerical simulation and CT scanning. The experimental results show that the crack initiation position of the circular hole specimen is located in the diagonal quadrant, the crack initiation position of the square hole specimen is located in the left tip position, and the crack initiation position of the triangular hole specimen is located in the midpoint of the bottom edge and the right tip position. When the defect morphology is constant, increasing size has a deteriorating response on rock mechanical properties; whereas under equal-size defect conditions, squares trigger the greatest loss of strength, followed by circles, and triangular defects exhibit optimal strength retention properties. With the increase of hole size, the volume of the plastic zone shows an increasing trend, under the same size conditions, the development of the plastic zone of the rock expanding then round &gt; triangle &gt; square. The research results can provide theoretical references for rock stability assessment and disaster prevention and control in karst areas.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105243"},"PeriodicalIF":5.6,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159180","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":"Towards predicting failure modes in multi-material extrusion-based additive manufactured PETG/TPC structures","authors":"Christoph Waly ,&nbsp;Vasco D.C. Pires ,&nbsp;Philipp Beier ,&nbsp;Sandra Schulnig ,&nbsp;Ivica Duretek ,&nbsp;Martin Pletz ,&nbsp;Florian Arbeiter","doi":"10.1016/j.tafmec.2025.105251","DOIUrl":"10.1016/j.tafmec.2025.105251","url":null,"abstract":"<div><div>The presence of defects in Fused Filament Fabrication (FFF) multi-material components can lead to various failure mechanisms, mainly depending on the interface quality between adjacent materials. This study investigates the predictability of crack deflection or penetration using two established criteria from Cook &amp; Gordon (C&amp;G) and He &amp; Hutchinson (H&amp;H). Samples are printed from glycol-modified poly(ethylene terephthalate) (PETG) and a compliant thermoplastic elastomer on copolyester basis (TPC), where TPC serves as a compliant interlayer (IL) within a PETG matrix. To evaluate the stress-based C&amp;G model, tensile tests are conducted on mono- and multi-material specimens. The fracture toughness of the TPC IL is determined using the Essential Work of Fracture approach. Interface fracture toughness between PETG and TPC is assessed using a stiffness drop technique combined with a finite element model, which applies the <em>J</em>-integral method. Two IL thicknesses of 0.3 and 0.8 mm are tested. The results from mechanical testing show that IL thickness does not significantly affect interface strength, but show that the choice of specimen geometry plays a key role regarding fracture behavior. Fracture tests reveal that increasing IL thickness enhances the macroscopical interface fracture toughness, although the TPC IL fracture toughness itself remains unaffected. The C&amp;G criteria prove unreliable due to high nonlinearity, mainly due to the TPC layer. In contrast, the H&amp;H criteria correctly identify the failure mode. Nevertheless, further investigations are necessary to validate the given transition value, as the toughness difference between the TPC IL and the interface is too large for conclusive interpretation.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105251"},"PeriodicalIF":5.6,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145268353","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":"Spatiotemporal representation of internal fracture sources using dual-surface infrared radiation and particle swarm optimization algorithm","authors":"Longfei Chang ,&nbsp;Yingjun Li ,&nbsp;Dejian Li ,&nbsp;Mingyuan Zhang ,&nbsp;Weiting Du ,&nbsp;Kai Cheng","doi":"10.1016/j.tafmec.2025.105249","DOIUrl":"10.1016/j.tafmec.2025.105249","url":null,"abstract":"<div><div>For rock or rock-like materials, early warning information regarding the timing and location of failure is particularly crucial. Infrared monitoring technology is widely applied in temporal predictions of failure occurrence; however, research on the localization of failure positions remains inadequate. Consequently, undertaking research in this area holds substantial importance. This study employed 3D printing technology to fabricate samples containing pre-set three-dimensional flaws. Under uniaxial compression conditions, real-time monitoring of the infrared radiation (IR) intensity on two adjacent non-load-bearing surfaces of the samples was conducted. By integrating the Lambert-Beer Law with a particle swarm optimization (PSO) algorithm, a method for calculating the locations of internal fracture radiation sources on basis of the IR intensity was established. Additionally, the localization results of this method were compared and analyzed with those of acoustic emission (AE) localization. The research findings demonstrate that the established localization method can fully utilize IR data to obtain distribution maps of internal fracture radiation sources at different moments. The size and position of these radiation sources in the distribution maps reflect the locations and degrees of damage to the samples. Comparisons with AE localization and photoelastic stress analysis results further validate the feasibility and effectiveness of this method. Moreover, the computational results reveal the pattern of change in the calculated intensity of radiation sources over time: a significant and abnormal surge in radiation intensity occurs at the moment of sample failure. Therefore, this new method can provide both temporal and spatial early warning information for sample failure. This study not only establishes a novel method for calculating the location of sample failure but also offers a new direction for the application of infrared monitoring technology in the field of rock engineering research, which holds important theoretical and practical importance.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105249"},"PeriodicalIF":5.6,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118882","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":"Effect of fiber reinforcement orientation on the interlaminar fracture toughness in mode I, mode II, and mixed-mode I/II fracture of onyx/aramid 3D printed composites","authors":"Benjamín A. Moreno-Núñez ,&nbsp;Gonzalo Pincheira-Orellana ,&nbsp;Manuel Burelo ,&nbsp;Carlos Rubio-González ,&nbsp;Enrique Martínez-Franco ,&nbsp;Jorge Pérez-Ampuero ,&nbsp;Cecilia D. Treviño-Quintanilla","doi":"10.1016/j.tafmec.2025.105248","DOIUrl":"10.1016/j.tafmec.2025.105248","url":null,"abstract":"<div><div>The fracture behavior of 3D printed composite materials (3DPCM) remains underexplored, particularly for Onyx-based composites reinforced with continuous Aramid fibers. This study evaluates the interlaminar fracture toughness of Onyx/Aramid composites under Mode I, Mode II, and Mixed-mode I/II loading using Double Cantilever Beam (DCB), End Notch Flexure (ENF), and Mixed-Mode Bending (MMB) methods. Crack initiation and propagation were analyzed for two aramid fiber orientations: 0° and 90°.</div><div>The results indicate that aramid fiber orientation significantly influences crack growth. Under Mode I, DCB0° and DCB90° samples exhibited similar crack initiation toughness, <span><math><mn>1.06</mn><mspace></mspace><mi>kJ</mi><mo>/</mo><msup><mi>m</mi><mn>2</mn></msup></math></span> and <span><math><mn>1.62</mn><mspace></mspace><mi>kJ</mi><mo>/</mo><msup><mi>m</mi><mn>2</mn></msup></math></span>, respectively. However, crack propagation was more unstable in 90° samples. In Mode II, ENF0° samples exhibited higher fracture toughness <span><math><mfenced><mrow><mn>5.36</mn><mspace></mspace><mi>kJ</mi><mo>/</mo><msup><mi>m</mi><mn>2</mn></msup></mrow></mfenced></math></span> than ENF90° <span><math><mfenced><mrow><mn>3.72</mn><mspace></mspace><mi>kJ</mi><mo>/</mo><msup><mi>m</mi><mn>2</mn></msup></mrow></mfenced></math></span>, demonstrating the effect of reinforcement alignment. Mixed-Mode tests require less energy for crack initiation, <span><math><mn>0.98</mn><mspace></mspace><mi>kJ</mi><mo>/</mo><msup><mi>m</mi><mn>2</mn></msup></math></span> for MMB0° and <span><math><mn>1.32</mn><mspace></mspace><mi>kJ</mi><mo>/</mo><msup><mi>m</mi><mn>2</mn></msup></math></span> for MMB90°, than Mode I or II, emphasizing the sensitivity of 3DPCM materials to combined tensile-shear loads found in real-world applications.</div><div>SEM analysis revealed additive manufacturing defects such as voids, fiber breakage, and poor interfacial adhesion, attributed to low pressure during fabrication. These defects lower fracture toughness and contribute to premature failure.</div><div>This research provides valuable data to the limited literature on Onyx/Aramid 3DPCM and emphasizes the influence of fiber orientation, fracture mode, and processing quality. Further research should focus on optimizing the mixed-mode testing and post-processing techniques that can improve the performance and reliability of final products made by 3DPCM.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105248"},"PeriodicalIF":5.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107228","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 statistical framework proposed for estimating fracture resistance of additively manufactured PLA components considering crack tip plasticity effects","authors":"Hossein Ahmadian ,&nbsp;Borhen Louhichi ,&nbsp;Hadi Sadeghian ,&nbsp;Majid R. Ayatollahi","doi":"10.1016/j.tafmec.2025.105246","DOIUrl":"10.1016/j.tafmec.2025.105246","url":null,"abstract":"<div><div>This study presents a statistical framework for assessing the fracture behavior of Polylactic Acid (PLA) specimens fabricated using the Fused Filament Fabrication (FFF) technique. Specifically, the model is developed to predict the fracture load of a specimen under predominant bending conditions, based on the tensile properties of the base material and the fracture resistance of a pre-cracked specimen subjected to predominantly tensile loading. To achieve this, tensile tests were first conducted on dogbone specimens, and the corresponding material properties were determined using the Digital Image Correlation (DIC) technique. Fracture tests were then performed on pre-cracked Semi-Circular Bending (SCB) and Single Edge Notched Tension (SENT) specimens to collect the fracture data. These experiments were conducted at two environmental temperatures (−10 °C and 25 °C) to further assess the efficacy of the proposed framework in predicting fracture loads under different levels of plasticity. The results of fracture tests were statistically analyzed using the Weibull model. Fracture mechanics criteria within the Theory of Critical Distances (TCD), especially the Point Method (PM) and the Line Method (LM), were then combined with the Weibull model to predict the fracture loads of target specimens (SCBs). Additionally, the Fictitious Material Concept (FMC) was employed to account for the plastic deformation around the crack tip in the SENT specimens. The results show that the proposed framework provides accurate predictions under both environmental conditions, with maximum discrepancy of 6.3 % at −10 °C and 2.7 % at 25 °C. Beyond the primary objective, this study also investigates the geometry effects on fracture behavior of the tested specimens. This analysis was conducted by examining the fracture surfaces and performing elastic-plastic Finite Element (FE) analyses to compare the size of their plastic zones. The findings from this investigation indicate that SENT specimens exhibited more pronounced plastic deformation compared to SCB counterparts.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105246"},"PeriodicalIF":5.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159179","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":"On an accurate and automated location of fatigue crack tip by analysing the displacement fields measured with digital image correlation","authors":"A. Camacho-Reyes ,&nbsp;G.L. Gómez Gonzales ,&nbsp;J.M. Vasco-Olmo ,&nbsp;F.A. Diaz","doi":"10.1016/j.tafmec.2025.105245","DOIUrl":"10.1016/j.tafmec.2025.105245","url":null,"abstract":"<div><div>This paper presents two algorithms for locating the tip of growing fatigue cracks by analysing Digital Image Correlation (DIC) data. This work aims to develop algorithms that are accurate, mathematically simple, easy to implement, and computationally efficient for this purpose. In addition, the goal is to simplify experimental setups and avoid invasive techniques, thereby integrating all measurements into the DIC analysis. The algorithms are implemented by analysing the crack tip displacement fields measured by DIC, establishing the discontinuity along the crack path during fatigue propagation as the basis for estimating the accurate crack tip location. The algorithms were validated through two representative cases: a straight-growing fatigue crack in a Compact Tension specimen made of commercially pure Titanium, and an inclined-growing fatigue crack in a Double Cantilever Beam specimen made of 2024-T3 aluminium alloy. A good level of agreement has been achieved between the results obtained with the implemented algorithms and those from an alternative method, with relative deviations of approximately 2 %.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"141 ","pages":"Article 105245"},"PeriodicalIF":5.6,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096725","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}