International Journal of Fracture最新文献_第9页

Modeling brittle crack propagation for varying critical load levels: a dynamic phase-field approach 不同临界载荷水平下的脆性裂纹扩展建模：动态相场方法

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-01-06 DOI: 10.1007/s10704-023-00754-3

Jonas Rudshaug, Tore Børvik, Odd Sture Hopperstad

{"title":"Modeling brittle crack propagation for varying critical load levels: a dynamic phase-field approach","authors":"Jonas Rudshaug, Tore Børvik, Odd Sture Hopperstad","doi":"10.1007/s10704-023-00754-3","DOIUrl":"10.1007/s10704-023-00754-3","url":null,"abstract":"<div><p>Brittle materials are known for their violent and unpredictable cracking behavior. A behavior which is dictated by a combination of microscopical material defects and the competition between the potential energy of the system and the surface energy of the material. In this study, we present the implementation of a dynamic fracture phase-field model with a new crack driving force into a commercial finite element (FE) solver and examine its behavior using three different tension-compression splits. After validating the implementation, we use the model to investigate its predictive capacity on quasi-statically loaded L-shaped soda-lime glass specimens with varying critical load levels. The dynamic fracture phase-field model predicted similar crack propagation to what was found in the literature for quasi-static and dynamic validation cases. By varying the critical load level for the L-shaped soda-lime glass specimens using the new crack driving force, the model predicted a positive correlation between the initial crack propagation speed and the critical load level, similar to what was seen in the experiments. However, the predicted crack propagation speed decreased quicker than the experimental crack propagation speed. The tension-compression splits had an impact on the predicted crack propagation paths. Overall, the proposed crack driving force used in the dynamic fracture phase-field model seems to capture the relation between critical load and initial crack propagation speed and thus enables crack predictions for specimens of varying strength.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"245 1-2","pages":"57 - 73"},"PeriodicalIF":2.2,"publicationDate":"2024-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10704-023-00754-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139375626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

An analysis of interfacial debonding in beaded fiber composites 珠状纤维复合材料界面脱粘分析

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2023-12-22 DOI: 10.1007/s10704-023-00753-4

Min Xu, H. Daniel Wagner, Bingbing An

{"title":"An analysis of interfacial debonding in beaded fiber composites","authors":"Min Xu, H. Daniel Wagner, Bingbing An","doi":"10.1007/s10704-023-00753-4","DOIUrl":"10.1007/s10704-023-00753-4","url":null,"abstract":"<div><p>Intermittent beading is a novel design that holds great potential for simultaneous improvement of strength and toughness of composites. Despite the progress in fabrication of beaded fiber composites, the mechanisms of fracture in such composites are largely unknown. In this study, calculations are carried out for interfacial debonding in a beaded fiber composite subjected to tensile loading. The post-yield strain softening followed by strain hardening of polymer matrix, and debonding of the fiber-bead, bead-matrix and fiber-matrix interfaces are accounted for in the numerical analyses. It is found that interfacial debonding can activate plastic deformation in the bead and polymer matrix, contributing to toughening of the beaded fiber composite. We have identified that the bead-matrix interfacial debonding is the major mechanism controlling plastic deformation in the matrix. The low cohesive strength of the bead-matrix interface plays a role in suppressing development of shear bands in the polymer matrix, enhancing plastic dissipation of the composite. The high toughness of the bead-matrix interface enables large plastic zone in the matrix, promoting plastic dissipation. For the fiber-bead interface, there is an increase in plastic dissipation of the composite with decreasing cohesive strength, while high interface toughness can amplify plastic dissipation. In addition, we reveal that weak fiber-matrix interface is capable of spreading plastic deformation in the matrix, increasing plastic dissipation of the composite. The findings of this study can shed new light on the fracture mechanisms of beaded fiber composites.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"245 3","pages":"195 - 208"},"PeriodicalIF":2.2,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138945323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Elastic crack-tip field in hydride forming metals under hydrogen chemical equilibrium 氢化学平衡下氢化物形成金属中的弹性裂纹尖端场

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2023-12-14 DOI: 10.1007/s10704-023-00752-5

A. G. Varias

引用次数: 0

Energy release rate of a mode-I crack in pure shear specimens subjected to large deformation 大变形纯剪切试样中ⅰ型裂纹的能量释放率

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2023-12-01 DOI: 10.1007/s10704-023-00751-6

Bangguo Zhu, Jikun Wang, Alan T. Zehnder, Chung-Yuen Hui

{"title":"Energy release rate of a mode-I crack in pure shear specimens subjected to large deformation","authors":"Bangguo Zhu, Jikun Wang, Alan T. Zehnder, Chung-Yuen Hui","doi":"10.1007/s10704-023-00751-6","DOIUrl":"10.1007/s10704-023-00751-6","url":null,"abstract":"<div><p>The Pure Shear (PS) crack specimen is widely employed to assess the fracture toughness of soft elastic materials. It serves as a valuable tool for investigating the behavior of crack growth in a steady-state manner following crack initiation. One of its advantages lies in the fact that the energy release rate (<i>J</i>) remains approximately constant for sufficiently long cracks, independent of crack length. Additionally, the PS specimen facilitates the easy evaluation of <i>J</i> for long cracks by means of a tension test conducted on an uncracked sample. However, the lack of a published expression for short cracks currently restricts the usefulness of this specimen. To overcome this limitation, we conducted a series of finite element (FE) simulations utilizing three different constitutive models, namely the neo-Hookean (NH), Arruda-Boyce (AB), and Mooney-Rivlin (MR) models. Our finite element analysis (FEA) encompassed practical crack lengths and strain levels. The results revealed that under a fixed applied displacement, the energy release rate (<i>J</i>) monotonically increases with the crack length for short cracks, reaches a steady-state value when the crack length exceeds the height of the specimen, and subsequently decreases as the crack approaches the end of the specimen. Drawing from these findings, we propose a simple closed-form expression for <i>J</i> that can be applied to most hyper-elastic models and is suitable for all practical crack lengths, particularly short cracks.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"245 3","pages":"171 - 182"},"PeriodicalIF":2.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138510171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A node-splitting lattice spring model coupled with a J-integral formulation as a fracture criterion 以j积分公式作为断裂准则的节点分裂点阵弹簧模型

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2023-11-23 DOI: 10.1007/s10704-023-00749-0

Bo Ye, Espen Jettestuen, Anders Malthe-Sørenssen

引用次数: 0

Numerical investigation of impact fracture behaviors of rocks under confining pressure 围压作用下岩石冲击断裂行为的数值研究

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2023-11-20 DOI: 10.1007/s10704-023-00747-2

Wei Gao, Jian Li, Chengyong Wang, Y. T. Feng

{"title":"Numerical investigation of impact fracture behaviors of rocks under confining pressure","authors":"Wei Gao, Jian Li, Chengyong Wang, Y. T. Feng","doi":"10.1007/s10704-023-00747-2","DOIUrl":"10.1007/s10704-023-00747-2","url":null,"abstract":"<div><p>Underground rocks in coal mining and oil exploration are usually subjected to in-situ stress and dynamic loading. In this paper, the tensile fracture behaviors of brittle rocks under coupled in-situ stress and dynamic loading are investigated numerically via the simulation of Brazilian disc (BD) tests of the modified split Hopkinson pressure bar (SHPB). To achieve this purpose, a cohesive zone model in the framework of the finite element method is used to model the cracking of the rock Brazilian disc under confining pressure. The pressure-dependent property of the rock is considered using the recently proposed bi-linear constitutive law. Dynamic Brazilian disc tests of the SHPB with two impact velocities of a striker are simulated for the rock. Comparisons between the simulated results and the reported experimental ones show a good agreement, demonstrating the accuracy and validity of the simulation models and the numerical approach. Due to the existence of holes in the rock in underground rock engineering practices, a pre-hole is inserted in the BD rock specimen in the modified SHPB tests to more realistically consider the rock fracture. The effects of the in-situ stress, the pre-hole size, and the pre-hole position on the dynamic fracture characteristics of the rock are numerically investigated using the modified SHPB test for BD rock specimen.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"245 1-2","pages":"37 - 56"},"PeriodicalIF":2.2,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138510178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Crack roughness of high-speed fracture in brittle single crystalline material 脆性单晶材料高速断裂的裂纹粗糙度

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2023-11-15 DOI: 10.1007/s10704-023-00750-7

Meng Wang, Lv Zhao, Marion Fourmeau, Daniel Nelias, Zhenhuan Li

{"title":"Crack roughness of high-speed fracture in brittle single crystalline material","authors":"Meng Wang, Lv Zhao, Marion Fourmeau, Daniel Nelias, Zhenhuan Li","doi":"10.1007/s10704-023-00750-7","DOIUrl":"10.1007/s10704-023-00750-7","url":null,"abstract":"<div><p>Dynamic crack involves instabilities promoted by either external perturbation or intrinsic front oscillation. In an effort to decipher fracture surface markings of brittle materials, crack roughness of Wallner lines promoted by shear waves and surface corrugations induced by spontaneous front oscillations was investigated with silicon single crystal. The statistical distribution of surface height variations and the corresponding roughness exponents were determined. The Wallner lines are found to be self-affine with a Gaussian distribution and a roughness exponent of 0.8, which are consistent with the surface flaws giving rise to shear waves. In contrast, the surface corrugations do not exhibit self-affinity, due to their scale invariant characteristic shape. Interestingly, specific instabilities, which appear at very high speed and exhibit similar physical properties as front waves, render the crack roughness self-affine with a Gaussian distribution and a roughness exponent of 0.5. The findings of the present work will help to understand the origin of fracture surface markings for brittle materials, especially for single crystalline ceramics.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"245 3","pages":"157 - 170"},"PeriodicalIF":2.2,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138510183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Displaying quasi-brittle failure using avalanches: paper as a material model 利用雪崩显示准脆性破坏：纸张作为材料模型

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2023-11-08 DOI: 10.1007/s10704-023-00748-1

François Villette, Julien Baroth, Frédéric Dufour, Sabine Rolland du Roscoat

引用次数: 0

Evolution and control technology of energy aggregation and dissipation of a high hard roof during breakage and destabilization 高硬度屋顶在破损和失稳时能量聚集和消散的演变与控制技术

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2023-11-02 DOI: 10.1007/s10704-023-00745-4

Yong Li, Yang Tai, Bin Yu, Tiejun Kuang, Rui Gao, Junyu Liu

{"title":"Evolution and control technology of energy aggregation and dissipation of a high hard roof during breakage and destabilization","authors":"Yong Li, Yang Tai, Bin Yu, Tiejun Kuang, Rui Gao, Junyu Liu","doi":"10.1007/s10704-023-00745-4","DOIUrl":"10.1007/s10704-023-00745-4","url":null,"abstract":"<div><p>The focus of this study was prevented disasters caused by the breaking of high hard roofs (HHRs) in mines. A model of the mining load-bearing capacity of a HHR cantilever beam structure (HHRCBS) was developed based on elastic foundation beam theory. The evolution of mining load-bearing capacity and energy aggregation and dissipation in HHRs were analyzed. Additionally, the dynamic working resistance experienced by hydraulic supports was quantitatively decomposed from an energy perspective. The findings indicated that (1) during mining operations, the pressure and strength of the working face were primarily governed by the stability of the HHRCBS. (2) The cantilever length significantly influenced the evolution of mining load-bearing capacity and energy aggregation and dissipation in the HHR. By reducing the length of the cantilever beam in the HHR, the effects of roof breakage on the cantilever beam structure were significantly decreased. (3) The dynamic load of the overburden and the energy released by the breakage of the HHR corresponded to 7536.1 kN, while the static load generated by the breaking of low rock blocks was 8348.3 kN. We then analyzed an integrated surface control technology for HHRs and conducted a field test in the Datong Mining District. The measured dynamic working resistance showed that the proposed integrated surface control technology could effectively prevent strong pressure during mining. </p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"245 1-2","pages":"1 - 23"},"PeriodicalIF":2.2,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A predictor for fatigue crack nucleation of single-network hydrogels considering water diffusion effect 考虑水扩散效应的单网络水凝胶疲劳裂纹成核预测器

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2023-10-24 DOI: 10.1007/s10704-023-00746-3

Shan Gao, Heng Feng, Liying Jiang

{"title":"A predictor for fatigue crack nucleation of single-network hydrogels considering water diffusion effect","authors":"Shan Gao, Heng Feng, Liying Jiang","doi":"10.1007/s10704-023-00746-3","DOIUrl":"10.1007/s10704-023-00746-3","url":null,"abstract":"<div><p>Owing to their excellent biocompatibility and capability of large deformation, hydrogels have attracted extensive attention for promising applications. When subjected to cyclic loads, hydrogels are susceptible to fatigue. To ensure their durability, it is crucial to have a deeper understanding on the fatigue mechanisms of hydrogels. However, there is a lack of study in the literature for predicting the fatigue damage of hydrogels under the coupling of large deformation and water diffusion. This work aims to formulate a fatigue life predictor for characterizing the crack nucleation of single-network hydrogels and unveil the effects of water diffusion on fatigue. Borrowing the concept of fatigue crack nucleation for rubber-like materials, the fatigue life predictor is developed within the framework of configurational mechanics. With the proposed predictor, the contributions of stretching and mixing to the fatigue damage of hydrogels are identified. Case studies with different swelling conditions are conducted to further distinguish various effects, including chemical potential, loading rate, and cyclic stretching amplitude, on both stretching and mixing induced damage. It is concluded that the fatigue damage accumulation in hydrogels under cyclic loading is the competing result of stretching and water diffusion. As the proposed predictor is capable of predicting the spatial fatigue damage of hydrogels, the current research can provide guidance on designing loading profiles to improve the fatigue life of hydrogels. In addition, by incorporating self-healing mechanism and multiphysics coupling, the proposed modeling framework can be further expanded to investigate the fatigue of other hydrogels, like double-network and stimuli-sensitive hydrogels.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"246 2-3","pages":"245 - 264"},"PeriodicalIF":2.2,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135265725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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