Engineering Fracture Mechanics最新文献_第9页

Integrated experimental and multi-trapping finite element approach to estimate critical hydrogen concentrations and embrittlement in CrMo steel 综合实验和多捕获有限元方法估算CrMo钢临界氢浓度和脆化

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-20 DOI: 10.1016/j.engfracmech.2025.111431

Chiara Colombo , Luis Borja Peral , Marcos Bueno , Inés Fernández-Pariente

{"title":"Integrated experimental and multi-trapping finite element approach to estimate critical hydrogen concentrations and embrittlement in CrMo steel","authors":"Chiara Colombo , Luis Borja Peral , Marcos Bueno , Inés Fernández-Pariente","doi":"10.1016/j.engfracmech.2025.111431","DOIUrl":"10.1016/j.engfracmech.2025.111431","url":null,"abstract":"<div><div>The paper presents a numerical study on a CrMo martensitic steel experiencing hydrogen embrittlement with enhanced localized plasticity mediated by decohesive mechanisms. Experimental inputs, including stress–strain curves, trap energies and densities, initial hydrogen concentration <em>C<sub>L0</sub></em> and diffusion coefficient, were inputted into a cohesive zone model. The model suggests quantifying embrittlement with three parameters: the critical concentration at the tip, the concentration peak ahead of the tip and the distance of the peak from the tip. The simulations at the two test speeds of 1 and 0.01 mm/min revealed that dislocation traps dominate at the crack initiation, with a critical hydrogen concentration at the tip of 2.5 <em>C<sub>L0</sub></em>, independent of the test speed. As propagation advances, the critical hydrogen concentration decreases to the asymptotic value of 1.5 <em>C<sub>L0</sub></em>. This trend changes as a function of the test speed: the lower the speed, the higher the time hydrogen has to move to the tip, the higher the concentration peak and its distance from the tip, and the higher the embrittling effect. These numerical results help to describe and quantify the experimental observations, e.g. embrittlement index and fracture surfaces. Overall, the approach highlights the capability and utility of numerical models in understanding hydrogen diffusion and embrittlement, offering insights for designing metallic materials sensitive to testing conditions.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111431"},"PeriodicalIF":4.7,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694824","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 investigation on strength, deformation , and failure behaviour of sandstone under various loading paths 不同加载路径下砂岩强度、变形及破坏特性试验研究

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-20 DOI: 10.1016/j.engfracmech.2025.111429

Tao Zhang , Xiaoli Liu

引用次数: 0

Phase-field modelling of moisture-induced fracture in wood 木材湿致断裂的相场模拟

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-19 DOI: 10.1016/j.engfracmech.2025.111415

Dennie Supriatna, Johannes Storm, Daniel Konopka, Michael Kaliske

引用次数: 0

ANSYS implementation of coupling peridynamic and classical continuum mechanics model for fracture analysis ANSYS实现了周动力学与经典连续介质力学模型的耦合断裂分析

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-19 DOI: 10.1016/j.engfracmech.2025.111402

Wenping Han, Fei Han, Zhibin Li

引用次数: 0

Rate-dependent fracture behavior of composite-metal adhesively bonded structure under symmetric separation loading 对称分离载荷下复合材料-金属粘接结构速率相关断裂行为

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-19 DOI: 10.1016/j.engfracmech.2025.111428

Zhilong Dang , Jianwu Zhou , Junchao Cao , Rongzhu Xia , Chao Zhang

{"title":"Rate-dependent fracture behavior of composite-metal adhesively bonded structure under symmetric separation loading","authors":"Zhilong Dang , Jianwu Zhou , Junchao Cao , Rongzhu Xia , Chao Zhang","doi":"10.1016/j.engfracmech.2025.111428","DOIUrl":"10.1016/j.engfracmech.2025.111428","url":null,"abstract":"<div><div>The failure behaviors of composite-metal adhesively bonded structures under various loading conditions have garnered significant interest in the field of structural mechanics. This research aims to explore the effects of displacement rates on the fracture behavior, particularly the fracture toughness, of such joints under symmetric separation loading, and to uncover the underlying mechanisms. Experimental tests were performed using a Double Cantilever Beam (DCB) with matched bending stiffness, and fracture toughness was evaluated for both quasi-static and dynamic fracture tests. An electromagnetic split Hopkinson bar system was employed to dynamically load the DCB specimens over a wide range of rates, showing a clear change in fracture toughness with increasing displacement rates. In the case of quasi-static loading, fracture toughness remains nearly constant. However, with dynamic loading, it rises significantly as the displacement rate increases, highlighting a strong displacement rate effect. Especially at a displacement rate of 22 m/s, the fracture toughness reached 4370 J/m<sup>2</sup>, which is 264 % greater than that observed under quasi-static conditions. Furthermore, scanning electron microscopy observations reveal that the adhesive layer exhibits pronounced ductile fracture characteristics across all displacement rates tested. Compared to quasi-static loading, dynamic loading results in shorter crack propagation distances within the adhesive layer, more significant damage, and areas of greater strength are more likely to fail.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111428"},"PeriodicalIF":4.7,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679827","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

Developing robust stress intensity factor models using Fourier-based data analysis to guide machine learning method selection and training 使用基于傅里叶的数据分析开发稳健的应力强度因子模型，以指导机器学习方法的选择和训练

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-19 DOI: 10.1016/j.engfracmech.2025.111387

Tushar Gautam , Jacob Hochhalter , Shandian Zhe , Eric Lindgren , Robert M. Kirby

{"title":"Developing robust stress intensity factor models using Fourier-based data analysis to guide machine learning method selection and training","authors":"Tushar Gautam , Jacob Hochhalter , Shandian Zhe , Eric Lindgren , Robert M. Kirby","doi":"10.1016/j.engfracmech.2025.111387","DOIUrl":"10.1016/j.engfracmech.2025.111387","url":null,"abstract":"<div><div>Stress intensity factors (SIFs) model the crack driving force and are a function of geometry, load, crack shape, and crack size. Finite element analysis can be used to compute SIFs but requires more resources (time and software) than handbook (surrogate) solutions. While efficient, handbook solutions have been limited in adapting to complex scenarios, <em>e.g.</em>, complex geometries. Machine learning (ML) offers an alternative way to create surrogate models from training data. This study presents the first application of a deep operator network (DeepONet) to the prediction of SIFs, introducing an approach that frames SIF calculation as an operator learning problem. Using DeepONet improves the accuracy of predicting SIFs, compared to other ML models like random forest regression (RFR), support vector machine regression (SVR), and neural network (NN). This work also aims to establish guidelines for ML method selection based on a comprehensive dataset analysis using Fourier transform (FT). FT helps guide ML model selection by analyzing frequency decay patterns to match data complexity with the most suitable ML model. This approach is demonstrated for two crack types — surface crack in a plate and corner crack at a hole in a plate. Consequently, the results of this study guide selecting an appropriate ML method, given a particular crack type with loading conditions and fixed data quantity.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111387"},"PeriodicalIF":4.7,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686591","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

Stress Intensity Factor and fatigue life prediction using the Total Lagrangian Smoothed Particle Hydrodynamics method 用全拉格朗日光滑质点流体力学方法预测应力强度因子和疲劳寿命

IF 5.3 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-18 DOI: 10.1016/j.engfracmech.2025.111388

Shen Pan , K.C. Ng , Songdong Shao , Jee Hou Ho

{"title":"Stress Intensity Factor and fatigue life prediction using the Total Lagrangian Smoothed Particle Hydrodynamics method","authors":"Shen Pan , K.C. Ng , Songdong Shao , Jee Hou Ho","doi":"10.1016/j.engfracmech.2025.111388","DOIUrl":"10.1016/j.engfracmech.2025.111388","url":null,"abstract":"<div><div>This study investigates fatigue life estimation and crack propagation in solid materials under cyclic loading by using the Total Lagrangian Smoothed Particle Hydrodynamics (TLSPH). TLSPH offers a mesh-free, stable framework, adept at handling large deformations and fractures without requiring additional crack tracking algorithms. It efficiently simulates crack initiation, propagation, and interaction, providing profound insights into fatigue mechanisms across various scenarios. The study focuses on determining Stress Intensity Factor (SIF) using TLSPH and using Paris’ law for fatigue life prediction under complex loading. First, we selected SIF prediction methods using TLSPH, then developed pseudo-spring and crack propagation algorithms in SPHinXsys. By combining these with the SIF predictive method and Paris’ Law, the fatigue life under various fracture modes was simulated. To speed up the simulation, a damping term was introduced to quickly stabilize the stress of the solid after loading. Through comprehensive modeling and comparison with experimental and numerical data, the study confirms the reliability and advancement of TLSPH in crack propagation simulation and fatigue life calculation.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"327 ","pages":"Article 111388"},"PeriodicalIF":5.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766728","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

Brittle fracture modelling in layered rocks using an adaptive phase-field modelling with a combined acceleration scheme 层状岩石脆性断裂的组合加速度自适应相场模拟

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-18 DOI: 10.1016/j.engfracmech.2025.111401

Jia-Nan He , Weihua Fang , Tiantang Yu

{"title":"Brittle fracture modelling in layered rocks using an adaptive phase-field modelling with a combined acceleration scheme","authors":"Jia-Nan He , Weihua Fang , Tiantang Yu","doi":"10.1016/j.engfracmech.2025.111401","DOIUrl":"10.1016/j.engfracmech.2025.111401","url":null,"abstract":"<div><div>This paper presents an effective and novel adaptive phase-field method combined with interface phase-field for brittle fracture in layered rocks. The bedding structure is diffused by interface phase-field without enhancing computational burdens. The equivalent material parameters in the vicinity of bedding planes are obtained from interface phase-field. A modified driving force is developed to capture mixed-mode fractures in rocks, i.e., pure-tension, tensile–shear, and compressive-shear cracks. The improved phase-field model considers the cohesive force, three frictional angles, and the difference of critical energy release rates between two fundamental cracks. Spatial adaptivity, which sets the phase field threshold as a refinement indicator, is incorporated into the proposed framework to improve computational efficiency. Variable-node elements are employed to treat newly generated hanging nodes. The BFGS and combined acceleration scheme (Anderson acceleration and over-relaxation) are compared with each other, and the latter one is more efficient for accelerating the simulation of mixed-fractures in layered rocks. The ability of the developed method to simulate mixed-mode fractures in layered rocks is verified through several examples. The effects of the angle between matrix cracking direction and bedding plane on the crack propagation path are investigated, and the effects of the interfacial critical energy release rate on the reaction force and imposed displacement are also addressed.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111401"},"PeriodicalIF":4.7,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671342","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

Mode-I and mixed-mode fracture behavior of stitch polymer-induced hydrogel-hydrogel interfacial topohesion 针状聚合物诱导的水凝胶-水凝胶界面拓扑连接的i型和混合模式断裂行为

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-18 DOI: 10.1016/j.engfracmech.2025.111430

Mohammed Shonar , Dapeng Li , Vijaya Chalivendra

{"title":"Mode-I and mixed-mode fracture behavior of stitch polymer-induced hydrogel-hydrogel interfacial topohesion","authors":"Mohammed Shonar , Dapeng Li , Vijaya Chalivendra","doi":"10.1016/j.engfracmech.2025.111430","DOIUrl":"10.1016/j.engfracmech.2025.111430","url":null,"abstract":"<div><div>Adhesive hydrogels have been extensively studied for wet tissue adhesion and a broader range of biomedical applications. Yet, the mode-I and mixed-mode fracture mechanics of soft–soft (e.g. gel-gel and gel-tissue) interfaces has not been thoroughly explored. Here, an alternative approach was presented to studying gel-gel interfacial fracture mechanics, particularly stitch polymer-induced topohesion, using amylopectin-reinforced polyacrylamide (Amy/PAAm) as the model hydrogel with chitosan as the stitching polymer, and employing new T-shaped specimen configuration for mode-I and mixed-mode fracture studies. Amy/PAAm hydrogel precursors were photocured into adherends and bonded together with 200 μL solutions of chitosan of varying molecular weights (MWs) to form T-shaped cross-section specimens for subsequent testing. The effect of different chitosan MWs (1.5, 15, 120, 250, and 343 kDa, and with no chitosan as control) and pHs of the chitosan solutions (ranging from 2.5 to 4.5) on the mode-I and mixed-mode fracture toughness was systematically studied. The mode-I and mixed-mode fracture initiation toughness was evaluated using nonlinear J-integral fracture mechanics. Chitosan with the highest MW and pH resulted in a 200 % increase in mode-I fracture toughness compared to the control, which is attributed to the robust interfacial chemistry and crack tip blunting phenomena. In the mixed-mode loading conditions, the fracture toughness is lower than that of mode-I for all configurations, and the highest MW and pH lead to about 65 % increase in the mixed-mode toughness. These results are supplemented and explained with strain fields around the fracture process zone at crack initiation using digital image correlation.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111430"},"PeriodicalIF":4.7,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679825","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

Mechanical response mechanism and seepage characteristics of gas-bearing bedding coal under impact loading 冲击载荷作用下含气顺层煤的力学响应机理及渗流特征

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-07-17 DOI: 10.1016/j.engfracmech.2025.111425

Lu Gao , Hongbao Zhao , Huaiqian Liu

{"title":"Mechanical response mechanism and seepage characteristics of gas-bearing bedding coal under impact loading","authors":"Lu Gao , Hongbao Zhao , Huaiqian Liu","doi":"10.1016/j.engfracmech.2025.111425","DOIUrl":"10.1016/j.engfracmech.2025.111425","url":null,"abstract":"<div><div>Investigating the mechanical response and seepage characteristics of coal under impact loading is essential for optimizing coalbed gas extraction and mitigating dynamic disasters in mines. In this study, impact tests were conducted on gas-bearing coal specimens with varying bedding angles using the Split Hopkinson Pressure Bar (SHPB) system. The crushing characteristics, energy dissipation behavior, and permeability variations were systematically analyzed. The results show that as the bedding angle increases, the dynamic impact stress–strain curve of gas-bearing bedding coal can be classified into three stages: elastic deformation, plastic deformation, and failure, and the peak strength, peak strain, and dynamic elastic modulus initially decrease and then increase. Additionally, the energy dissipation ratio follows a decreasing-then-increasing trend with increasing bedding angle, whereas the average particle size of fragmented coal first increases and then decreases. This suggests that under energy-driven conditions, the deformation and failure degree of coal evolves in a “difficult-easy-difficult” pattern with increasing bedding angle. Furthermore, a damage coupling model for bedding coal was established, and the simulation results closely aligned with the experimental data, effectively characterizing the damage evolution process of bedding coal under impact loading.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"326 ","pages":"Article 111425"},"PeriodicalIF":4.7,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686668","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