International Journal of Fracture最新文献_第9页

3D characterization of kinematic fields and poroelastic swelling near the tip of a propagating crack in a hydrogel 水凝胶中传播裂缝尖端附近运动场和孔弹性膨胀的三维表征

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-09-05 DOI: 10.1007/s10704-024-00810-6

Chenzhuo Li, Danila Zubko, Damien Delespaul, John Martin Kolinski

{"title":"3D characterization of kinematic fields and poroelastic swelling near the tip of a propagating crack in a hydrogel","authors":"Chenzhuo Li, Danila Zubko, Damien Delespaul, John Martin Kolinski","doi":"10.1007/s10704-024-00810-6","DOIUrl":"10.1007/s10704-024-00810-6","url":null,"abstract":"<div><p>In fracture mechanics, polyacrylamide hydrogel has been widely used as a model material in experiments due to its optical transparency, the brittle nature of its failure, and low Rayleigh wave velocity. Indeed, linear elastic fracture mechanics has been used successfully to model the fracture of polyacrylamide hydrogels. However, in soft materials such as hydrogels, the crack opening can be extremely large, leading to substantial geometric and material nonlinearity at the crack tip. Furthermore, poroelasticity may also modify the local mechanical state within the polymer network due to solvent migration. Direct characterization of the kinematic fields and the poroelastic response at the crack tip is lacking. Here we use a hybrid digital image correlation—particle tracking technique to retrieve high-resolution 3D particle trajectories near the tip of a slowly propagating crack, and measure the near-tip 3D kinematic fields in-situ. With this method, we charactherize the displacement fields, rotation fields, stretch fields, strain fields, and swelling fields. These measurements confirm the complex multi-axial stretching near the crack tip and the substantial geometric nonlinearity, particularly in the wake of the crack, where material rotation exceeds <span>(30^{circ })</span>. Comparison between the measured fields and the corresponding prediction from linear elastic fracture mechanics highlights an increasing disagreement in the direct vicinity of the crack tip, particularly for displacement component <span>(u_x)</span> and the through-thickness strain component <span>(varepsilon _{zz})</span>. Significant swelling occurs due to solvent migration, with a strong correlation to the local stretch.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"248 1-3","pages":"221 - 235"},"PeriodicalIF":2.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10704-024-00810-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185110","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

Toughening effects of out-of-crack-path architected zones 裂缝外路径拱形区的增韧效果

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-08-21 DOI: 10.1007/s10704-024-00811-5

Julie Triclot, Thomas Corre, Anthony Gravouil, Véronique Lazarus

{"title":"Toughening effects of out-of-crack-path architected zones","authors":"Julie Triclot, Thomas Corre, Anthony Gravouil, Véronique Lazarus","doi":"10.1007/s10704-024-00811-5","DOIUrl":"10.1007/s10704-024-00811-5","url":null,"abstract":"<div><p>The increasing use of architected materials has broadened the possibilities of mechanical behaviour. In this article, we aim to explore these new possibilities in terms of in-service behaviour, especially in terms of crack propagation by performing an in-depth study in the framework of Linear Elastic Fracture Mechanics (LEFM). The specific configuration studied here is the case where the architected zones are symmetrically positioned adjacently to the crack path and no propagation occurs within the zone. This problem is addressed both numerically and experimentally. Numerically, an path-following algorithm is used to simulate the crack propagation. Different toughening aspects of the addition of architected zones are identified. First, a temporary increase in crack propagation resistance is shown. It comes from a temporary increase of stored elastic energy in the architected zones, thus acting as mechanical springs. Second, a snap-back instability appears, linked to the release of the previously stored energy. It leads to a higher energy dissipated by the crack propagation process. Experimentally, we evidence the possibility to reproduce the theoretical results using 3D printing. A good quantitative comparison is obtained between numerical and experimental approaches. This study shows that it is possible to improve crack propagation resistance while lightening the component by addition of architected zones outside the crack path. This opens up the way to tune finely, through the use of optimization tools, the crack propagation response.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"248 1-3","pages":"237 - 255"},"PeriodicalIF":2.2,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185111","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

Hydrogen embrittlement properties of several stainless steels 几种不锈钢的氢脆特性

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-08-14 DOI: 10.1007/s10704-024-00809-z

Mitsuhiro Okayasu, Hisanobu Matsuura

{"title":"Hydrogen embrittlement properties of several stainless steels","authors":"Mitsuhiro Okayasu, Hisanobu Matsuura","doi":"10.1007/s10704-024-00809-z","DOIUrl":"10.1007/s10704-024-00809-z","url":null,"abstract":"<div><p>The hydrogen embrittlement (HE) characteristics of various stainless steels were investigated. In this study, as-received, heated (1100 °C, 15 h), and cold-rolled (30% strain) <i>γ-</i>austenite (AS), <i>α-</i>ferrite (FS), <i>α′-</i>martensite (MS), and <i>γ</i>–<i>α</i> duplex (DS) stainless steels were employed. For as-received stainless steels, severe HE occurred for DS and MS with static tensile loading, while no clear and weak HE was observed for AS and FS, respectively. This could be attributed to the different extent of hydrogen diffusivity in the stainless steel. A large amount of hydrogen penetrated to (i) lattice vacancy with low atomic density for body-centered cubic FS, DS, and MS, compared to that for face-centered cubic (AS); (ii) the phase boundary between <i>γ</i>-austenite and <i>α</i>-ferrite for DS; and (iii) the boundary between the Cr base precipitate and the martensite matrix for MS. HE also occurred strongly for heated-DS owing to the grain growth, i.e., a high hydrogen concentration in grain and phase boundaries. Although no clear HE was detected in as-received AS with static loading, HE occurred in cold-rolled AS, where hydrogen penetrated lattice vacancies and <i>α′</i>-martensite formed through strain-induced martensite. Owing to strain-induced martensite created during cyclic loading, HE was detected even for as-received AS, which is dissimilar to the result of the tensile test. Details of HE characteristics of the strainless steels were examined using the four stainless steels with different microstructures, diferent strain level and oxide layer. Moreover, those were investigated under different loading conditions, such as constant, static, and cyclic loading.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"248 1-3","pages":"201 - 220"},"PeriodicalIF":2.2,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185112","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 computational approach for phase-field model of quasi-brittle fracture under dynamic loading 动态加载下准脆性断裂相场模型的计算方法

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-08-05 DOI: 10.1007/s10704-024-00806-2

Roman Vodička

引用次数: 0

Prediction of crack growth in polycrystalline XH73M nickel-based alloy at thermo-mechanical and isothermal fatigue loading 多晶 XH73M 镍基合金在热机械和等温疲劳加载条件下的裂纹生长预测

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-07-29 DOI: 10.1007/s10704-024-00807-1

Aleksandr Sulamanidze, Valery Shlyannikov, Dmitry Kosov

{"title":"Prediction of crack growth in polycrystalline XH73M nickel-based alloy at thermo-mechanical and isothermal fatigue loading","authors":"Aleksandr Sulamanidze, Valery Shlyannikov, Dmitry Kosov","doi":"10.1007/s10704-024-00807-1","DOIUrl":"10.1007/s10704-024-00807-1","url":null,"abstract":"<div><p>The importance of developing simple relationships for interpreting crack growth rate test results and a practical approach to predicting crack propagation under thermo-mechanical fatigue conditions based on readily available data is emphasised by many authors. In this study, a damage impact parameter was introduced to predict the crack growth rate and durability under isothermal and thermo-mechanical fatigue conditions. To validate the model, we used a single-edge notched specimen made of polycrystalline coarse-grained nickel-based alloy XH73M. The specimen was subjected to loading conditions that included in-phase and out-of-phase thermo-mechanical fatigue at a temperature range of 400–650 °C, as well as isothermal fatigue at 26 °C, 400 °C and 650 °C. A numerical analysis was used to simulate the material deformation behaviour at the crack tip according to a nonlinear kinematic hardening model. Numerical and experimental stress–strain state parameters based on strain energy density were used to formulate and estimate the damage impact parameter. Based on the correlation between the crack growth rate and the introduced damage impact parameter, a method for predicting crack propagation is proposed. The accuracy of the proposed method was experimentally validated.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"248 1-3","pages":"153 - 177"},"PeriodicalIF":2.2,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141865993","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

Isogeometric multilayer thin-shell analysis of failure in composite structures with hygrothermal effects 具有湿热效应的复合材料结构失效的等时多层薄壳分析

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-07-27 DOI: 10.1007/s10704-024-00808-0

Weican Li, Hoang Nguyen, Yuri Bazilevs

引用次数: 0

Failure assessment of eccentric circular holes under compressive loading 压缩荷载下偏心圆孔的失效评估

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-07-17 DOI: 10.1007/s10704-024-00805-3

Francesco Ferrian, Alberto Sapora, Rafael Estevez, Aurélien Doitrand

{"title":"Failure assessment of eccentric circular holes under compressive loading","authors":"Francesco Ferrian, Alberto Sapora, Rafael Estevez, Aurélien Doitrand","doi":"10.1007/s10704-024-00805-3","DOIUrl":"10.1007/s10704-024-00805-3","url":null,"abstract":"<div><p>The present work aims to investigate the failure size effect on flattened disks containing an eccentric circular hole under mode I loading conditions. For this purpose, uniaxial compression tests are carried out on polymethyl methacrylate (PMMA) samples with holes. Depending on the hole radius and eccentricity, the energy release rate is either an increasing or decreasing function of the crack length, thus affecting the stability of crack propagation. Experimental results are interpreted and discussed through the coupled stress and energy criterion of Finite Fracture Mechanics. The approach lies on the assumption of a finite crack advance and it is implemented through the numerical estimation of the stress field and the Incremental Energy Release Rate functions. Finally, stability and crack speed propagation are discussed under the assumption of Linear Elastic Fracture Mechanics. Theoretical predictions reveal in agreement with experimental results thus demonstrating that the Coupled Criterion effectively captures the failure condition.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"248 1-3","pages":"109 - 125"},"PeriodicalIF":2.2,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10704-024-00805-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141719849","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

Dissipation during crack growth in a viscoelastic material from a cohesive model for a finite specimen 从有限试样的内聚模型看粘弹性材料裂纹增长过程中的耗散

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-07-08 DOI: 10.1007/s10704-024-00803-5

M. Ciavarella

{"title":"Dissipation during crack growth in a viscoelastic material from a cohesive model for a finite specimen","authors":"M. Ciavarella","doi":"10.1007/s10704-024-00803-5","DOIUrl":"10.1007/s10704-024-00803-5","url":null,"abstract":"<div><p>In the present paper, we extend results recently given by Ciavarella et al. (J Mech Phys Solids 169:105096, 2022) to show some actual calculations of the viscoelastic dissipation in a crack propagation at constant speed in a finite size specimen. It is usually believed that the cohesive models introduced by Knauss and Schapery and the dissipation-based theories introduced by de Gennes and Persson-Brener give very similar results for steady state crack propagation in viscoelastic materials, where usually only the asymptotic singular field is used for the stress. We show however that dissipation and the energy balance never reach a steady state, despite the constant propagation crack rate and stress intensity factor. Our loading protocol permits a rigorous solution, and implies a short phase with constant specimen elongation rate, but then possibly a very long phase of constant or decreasing elongation, which differs from typical experiments. For the external work we are therefore unable to use the de Gennes and Persson-Brener theories which suggested that the increase of effective fracture energy would go up to the ratio of instantaneous to relaxed modulus, at very fast rates. We show viscoelastic dissipation is in general a transient quantity, which can vary by orders of magnitude while the stress intensity factor is kept constant, and is largely affected by dissipation in the bulk rather than at the crack tip. The total work to break a specimen apart is found also to be possibly arbitrarily large for quite a large range of intermediate crack growth rates.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"248 1-3","pages":"95 - 108"},"PeriodicalIF":2.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10704-024-00803-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141575115","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

On the loci of exactness for truncated Williams crack-tip stress expansions 关于截断威廉姆斯裂缝尖端应力扩展的精确性位置

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-07-03 DOI: 10.1007/s10704-024-00802-6

Gaëtan Hello

{"title":"On the loci of exactness for truncated Williams crack-tip stress expansions","authors":"Gaëtan Hello","doi":"10.1007/s10704-024-00802-6","DOIUrl":"10.1007/s10704-024-00802-6","url":null,"abstract":"<div><p>Williams asymptotic expansions are widely used to represent mechanical fields at the vicinity of crack-tips in plane elastic media. For practical applications, series solutions have to be truncated and it is believed that a better accuracy can be achieved by retaining more terms in the summations. The influence of the truncation on the accuracy can be quantified comparing truncated closed-form Williams series solutions available for some fracture configurations to their corresponding complex exact counterparts. The computation of 2D absolute error fields reveals astonishing patterns in which appear points with numerically zero error implying the existence of loci where truncated series can provide exact results. These loci of exactness gather on curves emanating from the crack-tips and pointing towards the outside of series convergence disks. An analytical investigation of this phenomenon allows to relate the number and tangency angle at the crack-tip of these curves to the number and values of the zeros of Williams series angular eigenfunctions. Beyond its analytical interest in the understanding of Williams series framework, this property of exactness for truncated series can also help to improve the accuracy of experimental and computational techniques based on Williams series.</p></div>","PeriodicalId":590,"journal":{"name":"International Journal of Fracture","volume":"248 1-3","pages":"81 - 94"},"PeriodicalIF":2.2,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522793","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

Introduction to the special issue on structural integrity 结构完整性特刊导言

IF 2.2 3区工程技术

International Journal of Fracture Pub Date : 2024-07-02 DOI: 10.1007/s10704-024-00804-4

Viswanath Chinthapenta, Shailendra Joshi, Srinivasan Chandrasekar

引用次数: 0