Theoretical and Applied Fracture Mechanics最新文献_第2页

Dynamic mixed mode I/II fracture toughness and failure behaviour of freshwater ice under impact loading 冲击荷载下淡水冰的动态 I/II 混合模式断裂韧性和破坏行为

IF 5 2区工程技术

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-19 DOI: 10.1016/j.tafmec.2024.104769

Yiheng Zhang , Xiaobin Li , Wei Chen , Qing Wang , Duanfeng Han , Yu Hu

{"title":"Dynamic mixed mode I/II fracture toughness and failure behaviour of freshwater ice under impact loading","authors":"Yiheng Zhang , Xiaobin Li , Wei Chen , Qing Wang , Duanfeng Han , Yu Hu","doi":"10.1016/j.tafmec.2024.104769","DOIUrl":"10.1016/j.tafmec.2024.104769","url":null,"abstract":"<div><div>The dynamic mixed mode I/II fracture toughness of ice involves its fracture resistance under complex impact loading, which is essential for impact or blasting parameter selection and evaluation. The notched semi-circular bend (SCB) method was applied to determine the dynamic mixed mode I/II fracture toughness of freshwater ice based on a modified split Hopkinson pressure bar setup. The effects of loading rate and grain size on the mixed mode I/II fracture toughness of ice were comprehensively explored. A high-speed digital camera was adopted to record the crack propagation path and measure the crack propagation velocity. The experimental results indicate that the dynamic effective fracture toughness of SCB ice samples is dependent on the loading rate, particularly for mode I dominated loading. The dynamic fracture toughness decreases as the grain size increases from 0.8 to 4.5 mm. Subsequently, the fracture resistance was compared with the theoretical predictions based on some brittle fracture criteria. The generalized maximum tangential stress-based semi-analytical (SA-GMTS) criterion provides a good prediction for the dynamic mixed mode I/II fracture toughness of ice. For mixed mode I/II, the crack propagation velocities rise with the increase of loading rates. However, the grain size has little effect on the velocities. These results improve the understanding of the dynamic complex fracturing mechanism in ice engineering applications.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"135 ","pages":"Article 104769"},"PeriodicalIF":5.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721130","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

Experimental and DEM analyses of type I fracture characteristics of waste rock aggregate reinforced cemented tailing backfill 废石骨料加固水泥尾矿回填土 I 型断裂特性的实验和 DEM 分析

IF 5 2区工程技术

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-19 DOI: 10.1016/j.tafmec.2024.104764

Tianyu Zhu , Zhonghui Chen , Zhongyu Wang , Jian Cao , Jianshuai Hao , Zihan Zhou

{"title":"Experimental and DEM analyses of type I fracture characteristics of waste rock aggregate reinforced cemented tailing backfill","authors":"Tianyu Zhu , Zhonghui Chen , Zhongyu Wang , Jian Cao , Jianshuai Hao , Zihan Zhou","doi":"10.1016/j.tafmec.2024.104764","DOIUrl":"10.1016/j.tafmec.2024.104764","url":null,"abstract":"<div><div>In the downward filling mining method, the fracture of the roof of the filling body with cracks will seriously endanger the lives of the workers. In this study, uniaxial compression tests, splitting tensile tests and three-point bending fracture tests were performed on cemented waste rock tailing backfill (CWTB) with prefabricated notches, and the effect of waste rock aggregate content (10%, 20%, 30%, 40%, and 50%) on the basic mechanical parameters and fracture characteristics of the CWTB was analyzed in conjunction with digital image correlation (DIC) techniques. The safety warning parameter before the unstable fracture of CWTB was proposed. The toughening mechanism of aggregates was revealed. The results show that the incorporation of waste rock aggregate significantly improves the strength, fracture toughness, and fracture energy of CWTB. The multiple toughening mechanisms of waste rock aggregate synergistically improve the crack resistance of CWTB and prolong the time between initiation of cracking and unstable fracture. The content of waste rock aggregate changes the failure modes and crack extension paths of CWTB. Meanwhile, microscopic damage mechanism of CWTB was explored using PFC3D. The simulation results show that compared with cemented tailing backfill (CTB), aggregate-induced crack bifurcation and deflection effects increased the number of microcracks in CWTB, reduce the rate of microcracks in the stable extension period, and make its fracture surface rougher and more tortuous.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"135 ","pages":"Article 104764"},"PeriodicalIF":5.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721132","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

Interpolating CTS specimens’ mode I and II stress intensity factors using artificial neural networks 利用人工神经网络插值 CTS 试样的模式 I 和模式 II 应力强度因子

IF 5 2区工程技术

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-19 DOI: 10.1016/j.tafmec.2024.104761

R. Baptista , V. Infante , L.F.P. Borrego , E.R. Sérgio , D.M. Neto , F.V. Antunes

{"title":"Interpolating CTS specimens’ mode I and II stress intensity factors using artificial neural networks","authors":"R. Baptista , V. Infante , L.F.P. Borrego , E.R. Sérgio , D.M. Neto , F.V. Antunes","doi":"10.1016/j.tafmec.2024.104761","DOIUrl":"10.1016/j.tafmec.2024.104761","url":null,"abstract":"<div><div>Fracture mechanics parameters, such as the stress intensity factor (SIF), are fundamental for the analysis of fracture, fatigue crack growth and crack paths. SIFs of a cracked body can be determined either experimentally or numerically. Analytical solutions of SIF are very useful, but their determination from discrete values can be extremely complex when there are many independent variables. In this paper, artificial neural networks (ANN) are proposed to predict mode I and II stress intensity factors in a CTS specimen under mixed mode loading conditions. Trained with numerical data, the performance of different network architectures and backpropagation algorithms was assessed. Using at least 10 neurons, in the hidden layers, made it possible for the designed solution to match the performance of analytical solutions. Increasing the number of neurons, allowed the model performance to improve up to 90%, when compared with previous analytical solutions. This increases the quality of fracture and fatigue studies done with the CTS sample.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"134 ","pages":"Article 104761"},"PeriodicalIF":5.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704492","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}

引用次数: 0

Acoustic emission characteristics and cracking mechanism analysis of anisotropic shale containing a circular hole under uniaxial compression 单轴压缩条件下含圆孔的各向异性页岩的声发射特征和裂纹机理分析

IF 5 2区工程技术

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-19 DOI: 10.1016/j.tafmec.2024.104771

Xianhui Feng , Huilin Liu , Xu Chen , Weiche Chang , Kaizong Xia , Qifeng Guo , Liyuan Liu , Mingjie Li

{"title":"Acoustic emission characteristics and cracking mechanism analysis of anisotropic shale containing a circular hole under uniaxial compression","authors":"Xianhui Feng , Huilin Liu , Xu Chen , Weiche Chang , Kaizong Xia , Qifeng Guo , Liyuan Liu , Mingjie Li","doi":"10.1016/j.tafmec.2024.104771","DOIUrl":"10.1016/j.tafmec.2024.104771","url":null,"abstract":"<div><div>Shale is a kind of layered sedimentary rock widely existing in nature. In slope engineering, tunnel engineering, shale gas engineering and other practical engineering, layer structure and orientation will lead to the structural strength reduction, easy to cause safety accidents. In this study, the acoustic emission (AE) characteristics and fracture modes of shale samples containing a circular hole were investigated by uniaxial compression tests with different bedding angles. The experimental results revealed that the fracture modes of the sample are affected not only by the dip angle of bedding, but also by the stress concentration caused by the hole. Different fracture modes lead to differences in AE characteristics such as ring number, <em>b-</em>value, energy and peak frequency. Compared with shear failure, the cumulative AE count and peak frequency of tensile failure are higher, and the change frequency of the <em>b-</em>value is higher. Additionally, according to the RA-AF distribution characteristics of the shale samples, AF = 10RA + 21 was confirmed as the dividing line of different crack types, and the dividing result was consistent with that of macroscopic cracks. According to this dividing line, the crack evolution process was analyzed, and it was found that the tensile cracks and shear cracks were concentrated in the peak stress and phase of crack steady growth respectively. The study of AE characteristics of shale will provide experimental basis and reference for guiding related engineering practice.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"135 ","pages":"Article 104771"},"PeriodicalIF":5.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721195","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

Study on the mechanisms of time-dependent crack propagation and the gradual collapse of roadways in soft–hard composite strata 软硬复合地层中随时间变化的裂缝扩展和路面逐渐坍塌机理研究

IF 5 2区工程技术

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-17 DOI: 10.1016/j.tafmec.2024.104763

Binxu Wang , Ying Chen , Tingchun Li , Qingwen Zhu , Yiteng Du

{"title":"Study on the mechanisms of time-dependent crack propagation and the gradual collapse of roadways in soft–hard composite strata","authors":"Binxu Wang , Ying Chen , Tingchun Li , Qingwen Zhu , Yiteng Du","doi":"10.1016/j.tafmec.2024.104763","DOIUrl":"10.1016/j.tafmec.2024.104763","url":null,"abstract":"<div><div>As mineral extraction extends to deeper strata, the creep deformation differences between soft and hard rocks are further amplified by high stress. This increases the demand for controlling the lifecycle deformation of soft–hard composite rock roadways (S-HRs). This paper investigates the time-dependent characteristics of soft–hard composite rock composed of mudstone and sandstone (M-SR) via laboratory experiments and the damage bond model previously proposed by the author. The results show that crack propagation in M-SR exhibits a clear time-dependent effect, with the creep damage of mudstone being greater than that of sandstone, and this trend increases over time. Over 90 % of microcracks during the first two creep stages develop and coalesce in the mudstone, whereas crack propagation in the sandstone is inhibited. This process plays a critical guiding role in the final failure mode of the M-SR. After excavation, a tensile stress zone forms around the S-HR, with more drastic changes occurring on the sidewalls. This zone expands over time, whereas the deep compressive stress in the roof and floor shifts toward the sidewalls, exacerbating the depth of sidewall failure and continuously inducing the flow of the rock mass into the roadway from the sidewalls. After 48 days, the deformation of the sidewalls increases by 281 %. Increasing the support of sidewalls is a viable approach to solve this issue, and the support range should extend beyond the stress concentration zone. Leveraging the feedback mechanism between the roof and the sidewalls helps reduce creep damage and deformation on the sidewalls.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"134 ","pages":"Article 104763"},"PeriodicalIF":5.0,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704495","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

Deep learning for characterizing fracture toughness from the nanoindentation image of a complex heterogeneous medium 利用深度学习从复杂异质介质的纳米压痕图像表征断裂韧性

IF 5 2区工程技术

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-17 DOI: 10.1016/j.tafmec.2024.104759

A. Sakhaee-Pour

{"title":"Deep learning for characterizing fracture toughness from the nanoindentation image of a complex heterogeneous medium","authors":"A. Sakhaee-Pour","doi":"10.1016/j.tafmec.2024.104759","DOIUrl":"10.1016/j.tafmec.2024.104759","url":null,"abstract":"<div><div>Fracture toughness is a fundamental property characterized using nanoindentation, and it typically requires elastic modulus, applied load, and crack length. This study demonstrates that deep learning can predict fracture toughness using only nanoindentation images. A deep-learning model is designed, incorporating a pretrained Visual Geometry Group model with 16 layers (VGG16) and fully connected layers. The study augments 3,546 original nanoindentation images of shale to increase them to 21,276 images and employs the adaptive momentum (Adam) solver with a learning rate of 0.0002. The nanoindentation images contain complex patterns distinct from the simple topologies of homogeneous media, such as pure silica. Results show that the model accurately determines normalized fracture toughness, with a mean squared error (MSE) of 0.0014, indicating that the model effectively learns to interpret the underlying features. Additionally, once trained, the model predicts fracture toughness much faster than the existing approach based on <em>K</em>-means clustering. More importantly, this study suggests that nanoindentation images of complex porous media convey crucial information, including elastic modulus, applied load, and hardness. The results and the proposed model have applications in characterizing heterogeneous media with complex structures.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"135 ","pages":"Article 104759"},"PeriodicalIF":5.0,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721131","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 prefabricated flaw angle on the mechanical properties and failure characteristics of stratified cemented tailings backfill

IF 5 2区工程技术

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-16 DOI: 10.1016/j.tafmec.2024.104760

Shuaijun Chen , Wenjing Qin , Aibing Jin , Yiqing Zhao , Zhihao Li

{"title":"Effect of prefabricated flaw angle on the mechanical properties and failure characteristics of stratified cemented tailings backfill","authors":"Shuaijun Chen , Wenjing Qin , Aibing Jin , Yiqing Zhao , Zhihao Li","doi":"10.1016/j.tafmec.2024.104760","DOIUrl":"10.1016/j.tafmec.2024.104760","url":null,"abstract":"<div><div>The process of exposing stratified cemented tailings backfill (SCTB) underground is prone to damage due to blasting disturbances. To investigate the effect of flaws on the mechanical properties and failure characteristics of exposed SCTB, prefabricated flaws were used to simulate blasting damage. In this study, a uniaxial compression test, based on the digital image correlation (DIC) method, was used to investigate the mechanical characteristics of SCTB under different flaw dip angles. Additionally, the Particle Flow Code program was used to analyze the propagation of secondary cracks. The results show that: (1) With an increase in the flaw angle, the uniaxial compressive strength (UCS) of SCTB samples exhibit an initial decrease followed by an increase, and the elastic modulus of SCTB samples exhibit an increase. (2) When the flaw angle is between 0° and 45°, wing cracks and resistance tensile cracks mainly develop at the end of the flaw. For flaw angles between 60° and 75°, coplanar secondary cracks form at the end of the flaw and penetrate the stratified surface. (3) There are three main forms of crack propagation at the stratified surface: cracks passing through the stratified surface without deflecting, cracks deflecting at the stratified surface, and cracks that do not penetrate the stratified surface. (4) When cracks pass through the stratified surface without deflecting, the X-direction stress on both sides of the stratified surface changes synergistically, resulting in a large stress value. When the crack propagation direction deflects at the stratified surface, the X-direction stress differs on both sides, with smaller stress observed on the side away from the flaw. The larger the deflection angle of the crack propagation, the smaller the X-direction stress on the side away from the flaw. These results provide a basis for the stability evaluation and strength design of SCTB with flaws.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"135 ","pages":"Article 104760"},"PeriodicalIF":5.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743173","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

Study on the damage and fracture behaviors of fiber-reinforced cementitious composites by peridynamic simulation 通过周动态模拟研究纤维增强水泥基复合材料的损伤和断裂行为

IF 5 2区工程技术

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-16 DOI: 10.1016/j.tafmec.2024.104758

Man Wang , Liang Li , Jianjun Ma , Jun Wu , Xiuli Du

{"title":"Study on the damage and fracture behaviors of fiber-reinforced cementitious composites by peridynamic simulation","authors":"Man Wang , Liang Li , Jianjun Ma , Jun Wu , Xiuli Du","doi":"10.1016/j.tafmec.2024.104758","DOIUrl":"10.1016/j.tafmec.2024.104758","url":null,"abstract":"<div><div>A novel numerical model for the damage and fracture behaviors of fiber-reinforced cementitious composites (FRCC) is introduced based on Peridynamic (PD) theory. This Peridynamic fiber-reinforced Cementitious Composites (PD-FRCC) model improves the bond-based PD theory’s capability to describe the intrinsic microstructural heterogeneity and macroscopic nonlinear mechanical properties of cementitious by introducing key damage correction factors. A semi-discrete method is used to simulate the reinforcement effect of fibers, where a proportion of cementitious matrix bonds are randomly selected as fiber-reinforced bonds based on fiber content and length. The effectiveness and stability of the proposed numerical model are validated by numerical simulation examples. These examples include tensile tests of single-fiber cementitious plates, static tensile tests of steel-polyethylene hybrid fiber reinforced engineered cementitious composites (ST/PE-ECC), and tensile failure simulations of double-notched beams. The results demonstrate that the proposed numerical model accurately captures the complex morphology and propagation of FRCC cracks, and showcases high predictive accuracy. The significant impact of fiber bridging on material toughness and ductility during crack propagation is emphasized, revealing that fibers not only suppress initial crack growth but also lead crack propagation along complex paths, thereby extending crack propagation time and enhancing fracture resistance.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"134 ","pages":"Article 104758"},"PeriodicalIF":5.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704493","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

Shear mode solutions to penny-shaped crack problems in two-dimensional hexagonal piezoelectric quasicrystal media 二维六边形压电准晶介质中的笔形裂缝问题的剪切模求解

IF 5 2区工程技术

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-16 DOI: 10.1016/j.tafmec.2024.104762

Yuan Li , Shuhang Tang , Pengyun Li , Jingli Ren , Minghao Zhao

{"title":"Shear mode solutions to penny-shaped crack problems in two-dimensional hexagonal piezoelectric quasicrystal media","authors":"Yuan Li , Shuhang Tang , Pengyun Li , Jingli Ren , Minghao Zhao","doi":"10.1016/j.tafmec.2024.104762","DOIUrl":"10.1016/j.tafmec.2024.104762","url":null,"abstract":"<div><div>This study investigates shear mode penny-shaped crack problems in an infinite three-dimensional body composed of a two-dimensional hexagonal quasicrystal medium with piezoelectric effect. The crack is subjected to a set of shear phonon and phason loadings within the crack plane. This shear mode crack problem is transformed into a mixed boundary value problem in the upper half space. Subsequently, it is elegantly solved utilizing Fabrikant’s potential theory method. The boundary integral–differential equations governing three-dimensional shear mode crack problems in two-dimensional hexagonal piezoelectric quasicrystals are derived with the phonon and phason displacement discontinuities serving as unknown variables. Closed-form solutions for all physical field quantities are presented, not merely limited to the crack surface, but rather extended comprehensively to the entire space. Key fracture mechanics parameters, such as phonon and phason displacement discontinuities, stress intensity factors at the crack tip, and energy release rate, are explicitly derived. Numerical results are provided to validate the obtained analytical solutions and illustrate the distribution of the electric-phason-phonon coupling field around the crack in graphical form. Additionally, these numerical results also compare the fracture mechanics parameters of the chosen piezoelectric quasicrystal with its corresponding non-piezoelectric quasicrystal, thereby investigating the influence of piezoelectric effect on quasicrystals. The obtained solution can be used as a benchmark for the experimental and numerical study of shear mode cracks in piezoelectric quasicrystals.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"134 ","pages":"Article 104762"},"PeriodicalIF":5.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704494","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

Numerical prediction and experiments for 3D crack propagation in brittle materials based on 3D-generalized maximum tangential strain criterion 基于三维广义最大切向应变准则的脆性材料三维裂纹扩展数值预测与实验

IF 5 2区工程技术

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-14 DOI: 10.1016/j.tafmec.2024.104747

Yang Ju , Yihao Zhang , Hang Yu

{"title":"Numerical prediction and experiments for 3D crack propagation in brittle materials based on 3D-generalized maximum tangential strain criterion","authors":"Yang Ju , Yihao Zhang , Hang Yu","doi":"10.1016/j.tafmec.2024.104747","DOIUrl":"10.1016/j.tafmec.2024.104747","url":null,"abstract":"<div><div>Accurately predicting and tracing the three-dimensional (3D) propagation and fracture trajectory of a crack inside brittle materials is challenging. One difficulty is that the 3D crack propagation exhibits complex I/II/III mixed-mode expansion, and there is a lack of accurate crack initiation criteria and effective simulation methods. In our previous studies, the 3D-generalized maximum tangential strain (3D-GMTSN) criterion was proposed to determine the direction and onset of 3D fracture initiation. In this study, a Python program based on the 3D-GMTSN criterion is developed and integrated into FRANC3D to predict the 3D propagation trajectory of an arbitrary crack inside brittle solids. To verify the reliability of the new method, three different types of 3D crack modes, namely Internal Inclined Cracks Cuboid (IICC), Edge Notched Disc Bend (ENDB), and Three-Point Bending (TPB), are used for fracture experiments. The 3D crack propagation morphology is identified using high-resolution CT imaging techniques. The IICC, ENDB, and TPB models are simulated using the new method and the conventional numerical method based on the maximum shear stress (MSS), maximumtensile stress (MTS), and maximum energy release rate (MERR) criteria. Comparisons indicate that the proposed method based on the 3D-GMTSN criterion can predict the 3D crack propagation trajectory more accurately than the conventional methods.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"135 ","pages":"Article 104747"},"PeriodicalIF":5.0,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721129","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