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Fatigue crack propagation prediction of a pressure vessel mild steel based on a strain energy density model 基于应变能密度模型的压力容器低碳钢疲劳裂纹扩展预测
Fracture and Structural Integrity Pub Date : 2017-09-29 DOI: 10.3221/IGF-ESIS.42.09
P. Huffman, J. Ferreira, J. Correia, A. Jesus, G. Lesiuk, F. Berto, A. Fernández‐Canteli, G. Glinka
{"title":"Fatigue crack propagation prediction of a pressure vessel mild steel based on a strain energy density model","authors":"P. Huffman, J. Ferreira, J. Correia, A. Jesus, G. Lesiuk, F. Berto, A. Fernández‐Canteli, G. Glinka","doi":"10.3221/IGF-ESIS.42.09","DOIUrl":"https://doi.org/10.3221/IGF-ESIS.42.09","url":null,"abstract":"Fatigue crack growth (FCG) rates have traditionally been formulated from fracture mechanics, whereas fatigue crack initiation has been empirically described using stress-life or strain-life methods. More recently, there has been efforts towards the use of the local stress-strain and similitude concepts to formulate fatigue crack growth rates. A new model has been developed which derives stress-life, strain-life and fatigue crack growth rates from strain energy density concepts. This new model has the advantage to predict an intrinsic stress ratio effect of the form ?ar=(?amp)?·(?max )(1-?), which is dependent on the cyclic stress-strain behaviour of the material. This new fatigue crack propagation model was proposed by Huffman based on Walkerlike strain-life relation. This model is applied to FCG data available for the P355NL1 pressure vessel steel. A comparison of the experimental results and the Huffman crack propagation model is made.","PeriodicalId":300868,"journal":{"name":"Fracture and Structural Integrity","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129441074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 28
Modeling of the stress-strain relationship for specimens made of S355J0 steel subjected to bending block loading with mean load 平均荷载下弯曲块加载S355J0钢试件应力-应变关系建模
Fracture and Structural Integrity Pub Date : 2017-09-29 DOI: 10.3221/IGF-ESIS.42.04
R. Pawliczek, C. Lachowicz
{"title":"Modeling of the stress-strain relationship for specimens made of S355J0 steel subjected to bending block loading with mean load","authors":"R. Pawliczek, C. Lachowicz","doi":"10.3221/IGF-ESIS.42.04","DOIUrl":"https://doi.org/10.3221/IGF-ESIS.42.04","url":null,"abstract":"The paper presents results of calculation for modelling of the stressstrain relationship in the case of block loads with mean load value. A model, based on the stable hysteresis loops, was assumed and modified to use for block loading analysis. For stress history calculation, the proposed model and two other constitutive models were used. Results of fatigue test of specimens made of S355J0 steel subjected to bending block loading with mean load value are presented and used to verify the proposed model. In the tests, the mean load was increased and decreased in subsequent blocks. The changes of strain recorded during the tests shown in the paper indicate a different behavior of the material. Damage accumulation degree for block sequence was used to compare the results of calculations. It was shown, that stress history parameters (stress amplitude and mean stress value in this case) are similar for all investigated models.","PeriodicalId":300868,"journal":{"name":"Fracture and Structural Integrity","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132062862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effect of corrosion and sandblasting on the high cycle fatigue behavior of reinforcing B500C steel bars 腐蚀和喷砂对增强B500C钢筋高周疲劳性能的影响
Fracture and Structural Integrity Pub Date : 2017-09-29 DOI: 10.3221/IGF-ESIS.42.02
M. Vasco, P. Polydoropoulou, A. Chamos, S. Pantelakis
{"title":"Effect of corrosion and sandblasting on the high cycle fatigue behavior of reinforcing B500C steel bars","authors":"M. Vasco, P. Polydoropoulou, A. Chamos, S. Pantelakis","doi":"10.3221/IGF-ESIS.42.02","DOIUrl":"https://doi.org/10.3221/IGF-ESIS.42.02","url":null,"abstract":"In a series of applications, steel reinforced concrete structures are subjected to fatigue loads during their service life, what in most cases happens in corrosive environments. Surface treatments have been proved to represent proper processes in order to improve both fatigue and corrosion resistances. In this work, the effect of corrosion and sandblasting on the high cycle fatigue behavior reinforcing steel bars is investigated. The investigated material is the reinforcing steel bar of technical class B500C, of nominal diameter of 12 mm. Steel bars specimens were first exposed to corrosion in alternate salt spray environment for 30 and 60 days and subjected to both tensile and fatigue tests. Then, a series of specimens were subjected to common sandblasting, corroded and mechanically tested. Metallographic investigation and corrosion damage evaluation regarding mass loss and martensitic area reduction were performed. Tensile tests were conducted after each corrosion exposure period prior to the fatigue tests. Fatigue tests were performed at a stress ratio, R, of 0.1 and loading frequency of 20 Hz. All fatigue tests series as well as tensile test were also performed for as received steel bars to obtain the reference behavior. The results have shown that sandblasting hardly affects the tensile behavior of the uncorroded material. The effect of sandblasting on the tensile behavior of pre-corroded specimens seems to be also limited. On the other hand, fatigue results indicate an improved fatigue behavior for the sandblasted material after 60 days of corrosion exposure. Martensitic area reductions, mass loss and depth of the pits were significantly smaller for the case of sandblasted materials, which confirms an increased corrosion resistance.","PeriodicalId":300868,"journal":{"name":"Fracture and Structural Integrity","volume":"282 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115216771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Experimental evaluation of steel fiber effect on mechanical properties of steel fiber-reinforced cement matrix 钢纤维对钢纤维增强水泥基体力学性能影响的试验评价
Fracture and Structural Integrity Pub Date : 2017-09-29 DOI: 10.3221/IGF-ESIS.42.27
A. Jadidi, M. Amiri, E. Zeighami
{"title":"Experimental evaluation of steel fiber effect on mechanical properties of steel fiber-reinforced cement matrix","authors":"A. Jadidi, M. Amiri, E. Zeighami","doi":"10.3221/IGF-ESIS.42.27","DOIUrl":"https://doi.org/10.3221/IGF-ESIS.42.27","url":null,"abstract":"This paper investigates the possibility of combining steel fibers with different weight percentages along with their functions in increasing compressive strength, indirect tensile strength and bending strength. In this study, two types of steel fibers, hooked and crimped, have been employed in the preparation of samples. These fibers have a length to diameter ratio of 30 mm and 50 mm (L/D=30 and L/D=50). Further, the combination of these fibers caused a reduction in concrete flow and reduced its efficiency. The combination of these fibers caused considerable increase of concrete bending strength compared to fibreless and single-fiber type concretes. In this research, tensile strength and bending strength of samples with 1.5%, 2% and 2.5% fibers were investigated in which the tensile strength and bending strength of all samples increased. However, there were very considerable increases in tensile strength and bending strength of samples made with hybrid crimped fibers. The results indicated that steel fibers did not have much impact on concrete compressive strength.","PeriodicalId":300868,"journal":{"name":"Fracture and Structural Integrity","volume":"251 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116391610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Comparison of fracture toughness values of normal and high strength concrete determined by three point bend and modified disk-shaped compact tension specimens 用三点弯曲和改良盘形紧拉试样测定普通混凝土和高强混凝土断裂韧性值的比较
Fracture and Structural Integrity Pub Date : 2017-09-29 DOI: 10.3221/IGF-ESIS.42.07
S. Seitl, J. Ríos, H. Cifuentes
{"title":"Comparison of fracture toughness values of normal and high strength concrete determined by three point bend and modified disk-shaped compact tension specimens","authors":"S. Seitl, J. Ríos, H. Cifuentes","doi":"10.3221/IGF-ESIS.42.07","DOIUrl":"https://doi.org/10.3221/IGF-ESIS.42.07","url":null,"abstract":"The modified disk shaped compact tension test is a configuration derived from standard compact tension test that is used for measuring fracture mechanical properties of primarily metallic materials. The compact tension configuration is commonly used for measurement fracture mechanical properties as e.g. fracture toughness, Young’s modulus, work of fracture etc. The modified compact tension tests imply significant modifications of the specimen morphology in order to avoid premature failure. The modified compact tension test is not proper for quasi-brittle materials due to its complicated shape (steel-concrete interface), but it is easily extracted from drill core and we do not need large amount of material for obtaining fracture properties as we need for e.g. three- or four- point bend test. Since it is a new test method, a wide range of tests is needed to be done before it can be applied. In the paper the selected outputs of the experiments performed on normal and high strength concrete will be processed and the values of fracture mechanical parameters will be discussed.","PeriodicalId":300868,"journal":{"name":"Fracture and Structural Integrity","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132776372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Crack onset assessment near the sharp material inclusion tip by means of modified maximum tangential stress criterion 用修正的最大切向应力准则评价尖锐材料夹杂尖端附近的裂纹起裂
Fracture and Structural Integrity Pub Date : 2017-09-29 DOI: 10.3221/IGF-ESIS.42.08
Ondřej Krepl, J. Klusák
{"title":"Crack onset assessment near the sharp material inclusion tip by means of modified maximum tangential stress criterion","authors":"Ondřej Krepl, J. Klusák","doi":"10.3221/IGF-ESIS.42.08","DOIUrl":"https://doi.org/10.3221/IGF-ESIS.42.08","url":null,"abstract":"In the case of particle reinforced composites, where the particles are in a form of sharp material inclusions, singular stress concentration exists on each tip of each inclusion. This is due to the geometric and material discontinuities between matrix and particle. These points of stress concentration are susceptible of crack initiation and thus often responsible for failure of the whole structure. The modified maximum tangential stress criterion is employed in order to predict crack onset conditions.","PeriodicalId":300868,"journal":{"name":"Fracture and Structural Integrity","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130331506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Macroscopic criteria for the deformation and fracture of iron based alloys 铁基合金变形与断裂的宏观判据
Fracture and Structural Integrity Pub Date : 2017-09-29 DOI: 10.3221/IGF-ESIS.42.31
D. Orlova, A. Lunev, L. Danilova, L. Zuev
{"title":"Macroscopic criteria for the deformation and fracture of iron based alloys","authors":"D. Orlova, A. Lunev, L. Danilova, L. Zuev","doi":"10.3221/IGF-ESIS.42.31","DOIUrl":"https://doi.org/10.3221/IGF-ESIS.42.31","url":null,"abstract":"In the article the deformation of different steels is analyzed using the autowave theory of plasticity. The article considers the possible use of an autowave model to formulate criteria for the structural strength of materials and elastic-plastic transition. The time and place of future fracture for steel samples are shown can be predicted before visible necking takes place by using the kinetic dependencies of localized plasticity domains at the prefracture stage. The results show that during elastic-plastic transition in lowcarbon steel, there is the break of the curve for the ultrasound velocity versus deformation, which can serve as an acoustic criterion of irreversible deformation for the pressure treatment of metals, the operation and nondestructive testing of products and structures.","PeriodicalId":300868,"journal":{"name":"Fracture and Structural Integrity","volume":"135 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113993813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Fatigue crack growth in 2017A-T4 alloy subjected to proportional bending with torsion 2017A-T4合金比例弯曲与扭转作用下的疲劳裂纹扩展
Fracture and Structural Integrity Pub Date : 2017-09-29 DOI: 10.3221/IGF-ESIS.42.03
D. Rozumek, S. Faszynka
{"title":"Fatigue crack growth in 2017A-T4 alloy subjected to proportional bending with torsion","authors":"D. Rozumek, S. Faszynka","doi":"10.3221/IGF-ESIS.42.03","DOIUrl":"https://doi.org/10.3221/IGF-ESIS.42.03","url":null,"abstract":"The paper presents the results of tests on the fatigue crack growth for a constant moment amplitude under combined bending with torsion in the aluminium alloy AW-2017A-T4. The tests were performed under different values of the load ratio R. Plane specimens with stress concentrators in form of the external one-sided sharp notch were tested. A non-uniform fatigue cracks growth on both lateral surfaces of specimens was observed during experimental tests. Fatigue cracks were developing in the specimens in two stages; quarter-elliptic edge cracks were observed at the beginning, then evolving into through cracks.","PeriodicalId":300868,"journal":{"name":"Fracture and Structural Integrity","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121671559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Numerical analysis of the influence of liquid on propagation of a rolling contact fatigue crack 液体对滚动接触疲劳裂纹扩展影响的数值分析
Fracture and Structural Integrity Pub Date : 2017-09-29 DOI: 10.3221/IGF-ESIS.42.06
M. Olzak, J. Piechna, P. Pyrzanowski
{"title":"Numerical analysis of the influence of liquid on propagation of a rolling contact fatigue crack","authors":"M. Olzak, J. Piechna, P. Pyrzanowski","doi":"10.3221/IGF-ESIS.42.06","DOIUrl":"https://doi.org/10.3221/IGF-ESIS.42.06","url":null,"abstract":"Numerical investigations of the propagation of rolling contact fatigue crack filled by the liquid have been conducted. Two models of fluid – crack interaction have been considered. In the first model called “hydrostatic” the assumption of incompressible, inviscid and weightless liquid was accepted. It was also assumed that due to the wheel load the trapped liquid could not get outside the crack and its volume remained constant until the rising pressure would open up the crack mouth again. On this assumption the analysis has a steady-state character. In the second model it has been assumed that the crack is filled by the viscous, incompressible fluid and the fluid motion as well as the resulting pressure distribution can be represented by one-dimensional form of the Reynolds equation. The method for solving the problem of the coupled motion of liquid and crack faces has been developed and series of calculation were made. The method has been employed for the predicting of crack deformation in the course of wheel rolling.","PeriodicalId":300868,"journal":{"name":"Fracture and Structural Integrity","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115509844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Statistical analysis of fatigue crack propagation data of materials from ancient portuguese metallic bridges 葡萄牙古金属桥梁材料疲劳裂纹扩展数据的统计分析
Fracture and Structural Integrity Pub Date : 2017-09-29 DOI: 10.3221/IGF-ESIS.42.15
J. Correia, A. Jesus, R. Calçada, B. Pedrosa, C. Rebelo, L. Silva
{"title":"Statistical analysis of fatigue crack propagation data of materials from ancient portuguese metallic bridges","authors":"J. Correia, A. Jesus, R. Calçada, B. Pedrosa, C. Rebelo, L. Silva","doi":"10.3221/IGF-ESIS.42.15","DOIUrl":"https://doi.org/10.3221/IGF-ESIS.42.15","url":null,"abstract":"In Portugal there is a number of old metallic riveted railway and highway bridges that were erected by the end of the 19th century and beginning of the 20th century, and are still in operation, requiring inspections and remediation measures to overcome fatigue damage. Residual fatigue life predictions should be based on actual fatigue data from bridge materials which is scarce due to the material specificities. Fatigue crack propagation data of materials from representative Portuguese riveted bridges, namely the Pinhao and Luiz I road bridges, the Viana road/railway bridge, the Fao road bridge and the Trezoi railway bridge were considered in this study. The fatigue crack growth rates were correlated using the Paris’s law. Also, a statistical analysis of the pure mode I fatigue crack growth (FCG) data available for the materials from the ancient riveted metallic bridges is presented. Based on this analysis, design FCG curves are proposed and compared with BS7910 standard proposal, for the Paris region, which is one important fatigue regime concerning the application of the Fracture Mechanics approaches, to predict the remnant fatigue life of structural details.","PeriodicalId":300868,"journal":{"name":"Fracture and Structural Integrity","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130159394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
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