# International Journal of Fracture (INT J FRACTURE)

Publisher: Springer Verlag

## Journal description

The International Journal of Fracture is an outlet for original analytical numerical and experimental contributions which provide improved understanding of the mechanisms of micro and macro fracture in all materials and their engineering implications. The Journal is pleased to receive papers from engineers and scientists working in various aspects of fracture. Contributions emphasizing empirical correlations unanalyzed experimental results or routine numerical computations while representing important necessary aspects of certain fatigue strength and fracture analyses will normally be discouraged; occasional review papers in these as well as other areas are welcomed. Innovative and in-depth engineering applications of fracture theory are also encouraged. In addition the Journal welcomes for rapid publication concise Letters in Fracture and Micromechanics which serve the Journal 's Objective. Letters include: Brief presentation of a new idea concept or method; new experimental observations or methods of significance; short notes of quality that do not amount to full length papers; discussion of previously published work in the Journal and Letters Errata.

## Impact Factor Rankings

2015 Impact Factor Available summer 2016 1.566 1.348 1.25 1.485 1.043 0.804 1.147 1.003 0.685 0.705 0.95 1.008 0.797 0.767 0.531 0.612 0.443 0.398 0.529 0.603 0.548 0.541 0.642

## Impact factor over time

Impact factor
.
Year

5-year impact 1.83 >10.0 0.32 0.01 0.80 International Journal of Fracture website International journal of fracture, Fracture 0376-9429 1771045 Periodical, Internet resource Journal / Magazine / Newspaper, Internet Resource

## Publisher details

• Pre-print
• Author can archive a pre-print version
• Post-print
• Author can archive a post-print version
• Conditions
• Author's pre-print on pre-print servers such as arXiv.org
• Author's post-print on author's personal website immediately
• Author's post-print on any open access repository after 12 months after publication
• Publisher's version/PDF cannot be used
• Published source must be acknowledged
• Must link to publisher version
• Set phrase to accompany link to published version (see policy)
• Articles in some journals can be made Open Access on payment of additional charge
• Classification
​ green

## Publications in this journal

• ##### Article: Comparison of crack-arrest fracture toughness between low and high heat-input thick weld specimens
International Journal of Fracture 10/2015; DOI:10.1007/s10704-015-0041-2
• ##### Article: Analysis of a nonlinear crack in a piezoelectric half-space via displacement discontinuity method
International Journal of Fracture 09/2015; DOI:10.1007/s10704-015-0040-3
• ##### Article: The influences of Coulomb tractions on static and dynamic fracture parameters for semi-permeable piezoelectric cracks
Jun Lei · Pengbo Sun · Chuanzeng Zhang · Felipe Garcia-Sanchez
International Journal of Fracture 08/2015; DOI:10.1007/s10704-015-0037-y
• ##### Article: A simplified hardening cohesive zone model for bondline thickness dependence on adhesive joints
[Hide abstract]
ABSTRACT: In this paper, a tri-material adhesive system with nonlinear cohesive springs embedded between two elasto-plastic adhesive layers is proposed to predict the adhesive thickness effects on the fracture energy of bonded joints. The localized plastic and damage behaviours along the interface are described by the hardening cohesive zone models. The thickness dependent interfacial energy release rate is divided into the essential separation energy rate and the energy dissipation rate of the plasticization. The adhesive thickness dependent hardening cohesive zone model is implemented into the proposed numerical method to predict the failure of the adhesive joints. The validation of the model is performed by comparison with the experimental data.
International Journal of Fracture 07/2015; 194(1). DOI:10.1007/s10704-015-0036-z
• ##### Article: Experimental and numerical study on the plane-strain blanking process on an AHSS sheet
[Hide abstract]
ABSTRACT: The blanking/trimming/cropping process introduces a substantial plastic deformation to the sheet metal and causes premature edge fracture during the subsequent forming process. In an attempt to understand how the blanking process affects edge fracture, an experimental and numerical study was undertaken on the plane-strain blanking process. Blanking tests on a DP780 steel sheet were carried out on a special fixture utilizing a in-situ microscope for the digital mage correlation (DIC) deformation measurement. The DIC method provides a detailed deformation field of the specimen that has not been reported in any other publications before. Interrupted tests were carried out to study the crack formation and propagation during the blanking procedure, while scanning electron microscope was applied to examine the blanked surface quality as well as the edge profile after test. Following the experimental study, a detailed finite element model with mesh size of 0.01 mm in the critical region was established for the numerical investigation. The model features (a) a non-associated Hill 48 flow rule, (b) von-Mises yield condition and (c) modified Mohr–Coulomb fracture model. With material parameters calibrated from the in-plane tests as well as accurate boundary conditions measured in actual tests, the finite element model accurately predicted the blanking process quantitatively. The current study also gave quantitative values of the parameters of interest during the blanking test, such as the global load displacement response and the local strain gradient history. The geometrical features of the blanked edge, i.e. the amount of roll over, the extent of the burnished zone and fracture zone were all accurately predicted by the present simulation.
International Journal of Fracture 07/2015; 194(1):19-36. DOI:10.1007/s10704-015-0034-1
• ##### Article: Evaluation of fracture toughness of thin sheet of interstitial free high strength steel through critical crack tip opening angle (CTOA $$_\mathrm{c}$$ c ) measurement
International Journal of Fracture 07/2015; DOI:10.1007/s10704-015-0033-2
• ##### Article: Uniaxial strength and failure in sandstone containing a pre-existing 3-D surface flaw
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ABSTRACT: A series of uniaxial compression experiments were performed on specimens of sandstone containing a pre-existing 3-D surface flaw in various configurations. The influence of the single flaw geometry on the stress–strain response and failure process was recorded and then analyzed in detail including real-time capture of surface cracking process by photographic monitoring. Uniaxial compressive strength drops of 25.7, 33.2 and 21.6 % were observed due to an increase in the flaw length [InlineEquation not available: see fulltext.] and flaw depth [InlineEquation not available: see fulltext.] but a decrease in the inclination of the flaw [InlineEquation not available: see fulltext.]. The generation of three typical surface cracking patterns, namely wing cracks, anti-wing cracks and far-field cracks were identified and these depend on the geometry of the pre-existing surface flaw. Wing cracks initiate more readily from longer pre-existing flaws and those of deeper flaw depth or shallower flaw inclination while anti-wing cracks develop in the converse situation. Importantly, the stress required for crack initiation appears to decrease with an increase in flaw depth or a decrease in the flaw inclination. Finally, post-test imaging by X-ray computerized tomography defines the form of internal crack patterns including petal and wing cracks and their interaction and defines the macroscopic ultimate failure modes of the specimens and their dependency on the geometry of the pre-existing flaws. Although specimens containing a penetrating 2-D flaw normally rupture in a tensile splitting mode, those with a non-penetrating 3-D flaw generally fail in a combined shear mode which shows an increased dependency on the petal crack as flaw depth increases.
International Journal of Fracture 07/2015; 194(1). DOI:10.1007/s10704-015-0032-3
• ##### Article: Stress analysis and configurational forces for cracks in TRIP-steels
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ABSTRACT: TRIP-steels are known to possess attractive mechanical properties attributed to the austenite-martensite phase transformation, which provides additional deformability and hardening. In the present work the influence of strain-induced phase transformation on fracture is studied numerically for a casted TRIP-steel utilizing a recently developed material model. Large strain finite element analyses are carried out for a two-dimensional crack under small-scale yielding conditions to determine mechanical fields and fracture characterizing parameters. The results show that the hardening effect of martensite formation causes increased stresses and stress triaxiality ahead of the crack tip, which has implications for failure behavior. In order to generalize the classical J-integral for transformation plasticity, the concept of material forces is applied and numerically implemented. An appropriate path-independent formulation of the J-integral is suggested for TRIP-steels. A considerable amount of material forces is due to plastic deformation and phase transformation. The resultant material force at the crack tip is considered as the relevant energetic driving force for fracture. Furthermore, crack growth resistance curves $$J-{\varDelta } a$$ are simulated by means of a cohesive zone model, which allows to simulate the intrinsic fracture toughness. From the analyses, the beneficial impact of strain-induced phase transformation on the fracture resistance R-curves can be concluded. The transformation zone affects an energetic shielding of the very fracture process zone.
International Journal of Fracture 06/2015; 193(2). DOI:10.1007/s10704-015-0027-0
• ##### Article: Toughness measurement of thin films based on circumferential cracks induced at conical indentation
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ABSTRACT: In the present study, circumferential ring cracks were produced in two types of alumina coatings under conical indentation. The alumina coatings were produced using reactive dual pulsed magnetron sputtering. The coatings were deposited at 150 and $$530\,^\circ \hbox {C}$$ which resulted in coatings with hardness values of $$9.1\pm 0.2$$ and $$20.7\pm 1.1$$ GPa, respectively. The coating fractures were studied using scanning electron microscopy and the critical parameters for fracture: load, depth and crack radius, were determined for a range of coating thicknesses for both series. The crack behavior is compared to a numerical finite element model of the system. The model assumes the coating to be linear elastic while plasticity was included in the substrate. The critical parameters for different values of fracture toughness were extracted from the FEM stress field using closed-form expressions. The behavior of the simulated data and the experimental data was found to follow similar trends for all the investigated critical parameters. Furthermore, it was found that the critical load is the fracture parameter from which a measure for the fracture toughness is most accurately obtained. The hard coatings were observed to have higher fracture toughness than the softer coatings (200 vs. $$75 \, \hbox {J/m}^{2}$$ ).
International Journal of Fracture 06/2015; 193(2). DOI:10.1007/s10704-015-0022-5
• ##### Article: Mode II fracture parameters of dry snow slab avalanche weak layers calculated from the cohesive crack model
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ABSTRACT: Release of dry snow slab avalanches starts with shear failure within a thin weak layer beneath a stronger, cohesive slab. The propagating fracture is within the weak layer as mode II. The fundamental fracture properties include the weak layer critical mode II fracture energy and stress intensity factors. In this paper, mode II fracture energy was calculated from the cohesive crack model from dry slab avalanche fracture line data and in-situ shear fracture tests. One advantage of the cohesive crack model is that it does not require the effective elastic modulus which is highly rate dependent and largely unknown in avalanche release. The results gave weak layer mode II fracture toughness less than mode I fracture toughness for the cohesive slab and fracture energy about one order of magnitude less than for solid ice. From the fracture energy and the mode II stress intensity factor, Irwin’s relation enables calculation of the effective elastic modulus. Calculations of the effective modulus for mode II initiation were compared with other estimates and they were shown to be consistent.
International Journal of Fracture 06/2015; 193(2). DOI:10.1007/s10704-015-0026-1
• ##### Article: The role of flaws on crack growth in rock-like material assessed by AE technique
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ABSTRACT: Experiments for the rectangular rock-like samples (made of high-strength gypsum and water-cement ratio is 1) with two parallel pre-existing flaws subjected to uniaxial compression were carried out to further investigate the influence of varying flaw geometries on mechanical properties and crack coalescence behaviors. According to the tests results, eight crack types were characterized on a basis of the mechanisms of crack nucleation, formation and propagation, and seven coalescence modes occurred through the ligament, including S-mode, M1-mode, M2-mode, M3-mode, T1-mode, T2-mode and T3-mode. The AE and photographic monitoring techniques were adopted to further clarify the procedure of the crack coalescence and failure during uniaxial compression tests and in consequence the whole process of crack emergence, growth, coalescence and failure was recorded in real time. The results of AE technique revealed that the characteristics of acoustic emission energy associate with crack coalescence modes, and AE location method can emphasize the moments of crack occurrences and follow the crack growth until final failure. This study put forward better understanding of the fracture and failure mechanism of underground rock engineering, like rock burst.
International Journal of Fracture 06/2015; 193(2). DOI:10.1007/s10704-015-0021-6
• ##### Article: EBSD characterization of secondary microcracks in the heat affected zone of a X100 pipeline steel weld joint
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ABSTRACT: In order to get better understanding of the mechanism of cleavage fracture in the heat affected zone (HAZ) of X100 pipeline steel, secondary microcracks underneath the brittle fracture surface of a Charpy impacted sample with the notch located in the HAZ were characterized using electron backscattered diffraction. Since the coarse grained (CG) HAZ and intercritically reheated coarse grained (ICCG) HAZ are well accepted as the weakest region in the HAZ, the cleavage secondary microcracks in these two regions were observed respectively. Initiation and propagation of cleavage microcracks were discussed. The results show that the fracture behavior is obviously influenced by local microstructure. There are more secondary microcracks in the ICCGHAZ than in the CGHAZ which shows different probability for microcrack nucleation. Fracture mechanism changes from nucleation control in the CGHAZ to propagation control in the ICCGHAZ. The main reason for the increased possibility of secondary microcracks formation and the change in fracture mechanism is due to the formation of coarse necklacing martensite-austenite constituent in the ICCGHAZ. The results also show that high angle boundary, with the misorientation larger than $$45^{\,\circ }$$ , is effective in deflecting or arresting brittle cracks, while low angle boundary ( $$15^{\,\circ }{-}45^{\,\circ }$$ ) seems not. Most preferred crack planes are {100}, with decreasing probability of {110}, {112}, {123}.
International Journal of Fracture 06/2015; 193(2). DOI:10.1007/s10704-015-0024-3
• ##### Article: Influence of the stress state on void nucleation and subsequent growth around inclusion in ductile material
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ABSTRACT: A three-dimensional unit cell model with an inclusion is established, where an interfacial layer between the matrix and inclusion is modeled by a cohesive zone mode. This model is then used to investigate the effect of the stress state of the unit cell on the crack nucleation at the interface and subsequently the void growth, which gives the evolutions of the macro equivalent stress and relative void volume fraction associated with the macro equivalent strain. The interface debonding process indicates that both the stress triaxility and the Lode parameter play a remarkable role in the process and void nucleation and growth. Compared with the model of pure void, the inclusion increases the load carrying capacity and lowers the void growth rate for the same stress triaxiality. Meanwhile the inclusion causes a lag in the expansion of the void due to the interface fracture, which becomes significant as the stress triaxiality increases. The interfacial crack nucleates from different position for different Lode parameter and propagates in different pattern as the Lode parameter changes the principal stresses even for the same stress triaxiality. The two points, where the crack initiates and where the interface is fully debonded, vary with stress triaxiality and Lode parameter, and are getting closer for different Lode parameters when stress triaxiality increases.
International Journal of Fracture 05/2015; 193(1). DOI:10.1007/s10704-015-0016-3
• ##### Article: Buckling and longitudinal cracks in electromagnetically accelerated hollow cylinders
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ABSTRACT: Hollow cylindrical Al-6061 T6 projectiles, driven in a coilgun system, suffer radial compression and buckle into quadrilateral or pentagonal cross sections. In some cases, the projectiles fail by developing longitudinal cracks in the compressed region. Simulations of the coilgun-projectile system, using Johnson-Cook and Bao-Wierzbicki failure models, reproduce buckling and formation of longitudinal cracks via localization of plastic strain and high temperatures around the bends of the buckled geometry. Failed specimens were micro-graphically investigated and the cause of failure attributed to synergistic effect of buckled geometry and localized high temperature zones.
International Journal of Fracture 05/2015; 193(1). DOI:10.1007/s10704-015-0010-9