TY - CONF A1 - Komann, Steffen A1 - Kiyak, Yusuf A1 - Wille, Frank A1 - Zerbst, Uwe A1 - Weber, Mike A1 - Klingbeil, Dietmar T1 - Assessment of ductile cast iron fracture mechanics analysis within licensing of German transport packages N2 - In the design approval of transport packages for radioactive materials, the mechanical and thermal safety assessment is carried out in Germany by competent authority BAM. In recent years BAM was involved in several licensing procedures of new spent fuel and HLW package designs, where the cask body is of Ductile Cast Iron (DCI). According to IAEA regulations package designs have to fulfill requirements for specific conditions of transport. Type B(U) packages must withstand the defined accident conditions of transport. The temperature range from -40°C up to the operational temperature has to be considered. For the cask material DCI, it is necessary to determine safety against brittle fracture. The German guideline BAM-GGR 007 defines requirements for fracture mechanics of packagings made of DCI. Due to complex cask body structure and the dynamic loading a fracture mechanical assessment by analytical approaches is not always possible. Experience of recent design approval procedures show that the application of numerical calculations are applicable to determine the stresses and stress intensity factors in the cask body. At the first step a numerical analysis has to be done to identify the loading state at the whole cask body. Secondly an analysis of a detail of the cask body is made considering the displacement boundary conditions of the global model. An artificial flaw is considered in this detailed model to calculate the fracture mechanical loading state. The finite element mesh was strongly refined in the area of the flaw. The size of the artificial flaw is based on the ultrasonic inspection acceptance criteria applied for cask body manufacture. The applicant (GNS) developed additional analysis tools for calculation of stress intensity factor and/or J-Integral. The assessment approach by BAM led to the decision to develop own tools to the possibility for independent proof of the results. The paper describes the authority assessment approach for DCI fracture mechanics analysis. The validation procedure incl. the development of own tools is explained. BAM developed a postprocessor to determine the fracture mechanical loads. A horizontal 1 m puncture bar drop test is used to give a detailed description of the assessment procedure. T2 - PATRAM 2013 - 17th International symposium on the packaging and transportation of radioactive materials CY - San Francisco, CA, USA DA - 18.08.2013 PY - 2013 SP - 1 EP - 10 PB - Omnipress AN - OPUS4-30175 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schork, B. A1 - Zerbst, Uwe A1 - Kiyak, Yusuf A1 - Kaffenberger, M. A1 - Madia, Mauro A1 - Oechsner, M. T1 - Effect of the parameters of weld toe geometry on the FAT class as obtained by means of fracture mechanics-based simulations N2 - The fracture mechanics-based IBESS approach is applied to the determination of FAT classes of butt welds with crack Initiation along the weld toe. The aim is an investigation of the effect of the geometrical parameters toe radius, flank angle, reinforcement and secondary notches such as roughness or undercuts. The influence of these parameters is discussed both individually and in combination; however, excluding statistical distributions of them and the material data. The results, when compared with conventional FAT classes for butt welds, are encouraging with respect to a potential contribution of IBESS to the discussion of more advanced quality criteria for welds. To that purpose, demands for further research are proposed. KW - Fracture mechanics KW - Weld toe geometry KW - Fatigue crack initiation KW - FAT class approach PY - 2020 DO - https://doi.org/10.1007/s40194-020-00874-7 IS - 64 SP - 925 EP - 936 PB - Springer AN - OPUS4-53079 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bergant, M. A1 - Werner, Tiago A1 - Madia, Mauro A1 - Yawny, A. A1 - Zerbst, Uwe T1 - Short crack propagation analysis and fatigue strength assessment of additively manufactured materials: An application to AISI 316L N2 - This paper presents the application of short crack propagation models based on the cyclic R-curve for assessing the fatigue strength of additively manufactured (AM) materials containing fabrication defects. Chapetti’s and IBESS models were implemented in combination with Murakami’s √area parameter, considering recently published data on laser powder bed fusion processed AISI 316L stainless steels. Estimated S-N curves and Kitagawa-Takahashi diagrams predict fairly well the experimental data, especially the origin of the failure from internal or surface defects. These results provide an indication that the methods based on the cyclic R-curve constitute suitable tools for fatigue behavior assessment of AM materials. KW - AM 316L stainless steel KW - Cyclic R-curve KW - Chapetti’s and IBESS model KW - S-N curve KW - Kitagawa-Takahashi diagram PY - 2021 DO - https://doi.org/10.1016/j.ijfatigue.2021.106396 VL - 151 PB - Elsevier Ltd. AN - OPUS4-53082 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Madia, Mauro A1 - Vojtek, T. A1 - Duarte, Larissa A1 - Zerbst, Uwe A1 - Pokorný, P. A1 - Jambor, M. A1 - Hutař, P. T1 - Determination of fatigue crack propagation thresholds for steel in presence of environmental effects N2 - The experimental determination of the resistance to fatigue crack propagation in steel, particularly in the socalled near-threshold regime, is a crucial issue for safety-relevant components which are designed to operate for a large number of loading cycles before undergoing periodic inspections. This work summarizes the most relevant results of extensive experimental campaigns conducted at BAM and IPM over the last years, which have been devoted to the determination of fatigue crack propagation characteristics on medium and high strength steels. The influence of environment, oxide-induced crack closure and test methodologies in the near-threshold regime are discussed. KW - Steel KW - Fatigue crack propagation threshold KW - Oxide-induced crack closure KW - Environmental effect PY - 2021 DO - https://doi.org/10.1016/j.ijfatigue.2021.106449 SN - 0142-1123 VL - 153 SP - 1 PB - Elsevier Ltd. AN - OPUS4-53525 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zerbst, Uwe A1 - Madia, Mauro T1 - Analytical flaw assessment N2 - The paper provides a review on analytical flaw assessment methods with the focus on fracture under monotonic loading and fatigue crack propagation. The first topic comprises linear elastic as well as elastic-plastic fracture mechanics approaches. It essentially follows their historical development. Topics which are separately discussed are reference/Limit loads, the treatment of secondary stresses, strength mismatch, constraint, unstable crack propagation (monotonic R-curve analyses) and statistical aspects. With respect to fatigue crack propagation the analytical treatment of crack closure and constraint and the Determination of the cyclic elastic-plastic crack driving force is discussed. Finally, cyclic Rcurve analyses are briefly addressed. KW - Monotonic and cyclic crack driving force KW - Secondary stresses KW - Strength mismatch KW - Constraint KW - Crack closure KW - R-curve analysis PY - 2018 DO - https://doi.org/10.1016/j.engfracmech.2017.12.002 SN - 0013-7944 SN - 1873-7315 VL - 187 SP - 316 EP - 367 PB - Elsevier AN - OPUS4-44234 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zerbst, Uwe A1 - Madia, Mauro A1 - Beier, H. Th. T1 - Fatigue strength and life determination of weldments based on fracture mechanics N2 - The paper provides an overview on the results of a German cluster project on the use of fracture mechanics to the determination of the fatigue strength of weldments with fatigue cracks originating at the weld toes. The approach includes (a) a concept for short crack propagation for which the common ΔK concept is not applicable and the crack closure effects are still being gradually build-up, (b) a method for determining fatigue life relevant initial crack sizes as they are needed in any fracture mechanics analysis and (c) multiple cracking and crack coalescence at load levels higher than the endurance limit. The analyses are stochastically performed. Both, the endurance limit and the finite life branch of the S-N curve are determined. Besides a brief introduction into the approach, validation examples are presented. These comprise different weldment types (butt welds, cross joints and longitudinal stiffened plates), two steels (S355NL and S960QL) of quite different strengths, different weld geometries due to different welding techniques (WIG, MAG), as-welded and stress relieved welds and different stress ratios varying from R = -1 to R = 0.5. T2 - FDMD 2017 CY - Lecco, Italy DA - 19.09.2017 KW - Weldments KW - Fatigue strength KW - Fracture mechanics KW - Initial crack size KW - Short crack propagation KW - Multiple crack propagation PY - 2017 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-438500 DO - https://doi.org/10.1016/j.prostr.2017.11.106 SN - 2452-3216 VL - 7 SP - 407 EP - 414 PB - ScienceDirect CY - Lecco, Italy AN - OPUS4-43850 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zerbst, Uwe A1 - Hensel, Jonas T1 - Application of fracture mechanics to weld fatigue N2 - The application of fracture mechanics to the determination of the fatigue behavior of weldments is discussed with the focus on classic fatigue, i.e., the overall fatigue life and the fatigue strength in terms of an S-N curve and the endurance limit. The following issues are addressed: specific features of short fatigue crack propagation, an adequate initial crack size, multiple crack propagation and its statistical treatment as well as welding residual stresses. As an example, an approach of the authors is applied to the determination of FAT classes for a butt weld with varying weld toe geometry. KW - Weld fatigue KW - Weld toe geometry KW - Short crack propagation KW - FAT class concept PY - 2020 DO - https://doi.org/10.1016/j.ijfatigue.2020.105801 SN - 0142-1123 VL - 139 SP - 105801 PB - Elsevier Ltd. AN - OPUS4-50991 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zerbst, Uwe A1 - Vormwald, M. A1 - Pippan, R. A1 - Gänser, H.-P. A1 - Sarrazin-Baudoux, C. A1 - Madia, Mauro T1 - About the fatigue crack propagation threshold of metals as a design criterion - A review N2 - The fatigue crack propagation threshold ΔKth is of paramount importance for any kind of damage tolerant design, but in contrast to this importance, the determination and application of the parameter is not on the firm ground as previously assumed. The paper discusses questions of its experimental determination as well as of its application to components. In both fields, new questions have been raised with the potential to challenge or modify long-standing knowledge. Against this background, the paper is an attempt to systematize the established knowledge as well as questions and open issues. KW - Fatigue crack propagation threshold KW - Experimental determination KW - Influencing factors KW - Transferability to components PY - 2016 DO - https://doi.org/10.1016/j.engfracmech.2015.12.002 SN - 0013-7944 SN - 1873-7315 VL - 153 SP - 190 EP - 243 PB - Elsevier Science CY - Kidlington AN - OPUS4-35264 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Madia, Mauro A1 - Zerbst, Uwe T1 - Application of the cyclic R-curve method in notch fatigue analysis N2 - The paper deals with the prediction of the fatigue Limit of notched specimens. Some authors in the literature have shown that this issue can be solved by employing an approach based on critical distances, others used elastic fracture mechanics. In this paper the fatigue limit of notched specimens is given by the non-propagating condition of mechanically small surface cracks. According to the so-called cyclic R-curve method, the crack driving force of a growing small crack is compared to its resistance force, which incorporates the gradual build-up of crack closure. The fatigue limit is determined by that applied nominal stress, for which the tangency condition of crack driving and resistance force is satisfied. The approach has been modified to incorporate plasticity effects in the mechanically short crack Regime and it has been applied to a mild and a high-strength steel, in case of an infinite plate with circular hole under remote tensile stress. The method has been successfully applied to the evaluation of fatigue notch-sensitivity in case of surface roughness. KW - Notch fatigue KW - Notch sensitivity KW - Cyclic R-curve KW - Non-propagating cracks KW - Critical distance PY - 2016 DO - https://doi.org/10.1016/j.ijfatigue.2015.06.015 SN - 0142-1123 VL - 82 IS - 1 SP - 71 EP - 79 PB - Elsevier Ltd. CY - Oxford, UK AN - OPUS4-35298 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zerbst, Uwe A1 - Klinger, Christian A1 - Clegg, R. T1 - Fracture mechanics as a tool in failure analysis - Prospects and limitations N2 - Although fatigue crack propagation and fracture cause a large part of failure events in industrial practice, fracture mechanics in failure analysis seems to be still a side issue. Starting from an introduction into important basic questions of failure analysis and fracture mechanics, the authors specify what kind of questions in failure analysis can be effectively solved by fracture mechanics (and which can't). They illustrate their discussion with a number of 13 case studies from the literature. Much more pronounced than in the design stage the benefit of fracture mechanics in failure analysis depends on its accuracy. This is limited by both, intrinsic factors of the method and the availability and quality of the input information. The authors discuss the various aspects and provide the reader with some background information which, as they believe, will be helpful for better understanding the prospects and limitations of fracture mechanics in failure analysis and the conditions of its application. KW - Failure analysis KW - Fracture mechanics KW - Fatigue KW - Root cause KW - Accompanying measures PY - 2015 DO - https://doi.org/10.1016/j.engfailanal.2015.07.001 SN - 1350-6307 SN - 1873-1961 VL - 55 SP - 376 EP - 410 PB - Elsevier Science Publ. CY - Oxford AN - OPUS4-33839 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zerbst, Uwe A1 - Kiyak, Yusuf A1 - Madia, Mauro A1 - Burgold, Andreas A1 - Riedel, Gernot T1 - Reference loads for plates with semi-elliptical surface cracks subjected to tension and bending for application within R6 type flaw assessment N2 - Two of the authors of the present paper proposed a definition of a reference load F0 which can be used as an alternative option to the common limit load for cases where the definition of the latter might be problematic in the frame of flaw assessment procedures such as R6, BS 7910, SINTAP or FITNET. The reference load is defined as that load at which the ligament yielding parameter Lr approaches one. F0, in general, varies along the crack front. It has to be obtained by finite element analyses but the results can be approximated by analytical expressions. In a previous study of the authors such a solution was presented for tension loaded plates with semi-elliptical surface cracks. In the present paper it is extended to pure bending and to combined bending and tension. KW - Flaw assessment KW - R6 procedure KW - BS 7910 KW - SINTAP KW - FITNET KW - Limit load KW - Reference load PY - 2013 DO - https://doi.org/10.1016/j.engfracmech.2012.11.017 SN - 0013-7944 SN - 1873-7315 VL - 99 SP - 132 EP - 140 PB - Elsevier Science CY - Kidlington AN - OPUS4-30416 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Madia, Mauro A1 - Zerbst, Uwe A1 - Beier, H.T. T1 - A model for the determination of the fatigue life in technical alloys containing large and small defects N2 - The determination of the fatigue life in technical alloys containing large and small defects must rely on a propagation model which accounts for short and long crack growth. Recently an analytical model which incorporates propagation in the short crack regime and plastic correction for the crack driving force has been presented by two of the authors. This work is intended to show further validation of the model, taking into account data sets for different materials with different testing conditions. Despite the assumptions about missing parameters, the value of which had to be taken from the literature, the predictions showed a fairly good approximation of the fatigue lives. A possible interpretation of the results in terms of multiple crack initiation and propagation at higher loads is proposed. T2 - EFC20 - 20th European conference on fracture CY - Trondheim, Norway DA - 30.06.2014 KW - Fatigue strength KW - Crack propagation KW - Short cracks PY - 2014 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-311961 DO - https://doi.org/10.1016/j.mspro.2014.06.082 SN - 2211-8128 VL - 3 SP - 493 EP - 498 PB - Curran CY - Red Hook, NY, USA AN - OPUS4-31196 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Zerbst, Uwe A1 - Madia, Mauro A1 - Schork, Benjamin T1 - Fracture mechanics based determination of the fatigue strength of weldments N2 - A fracture mechanics model which shall be applied to the fatigue strength determination of weldments has to focus on various aspects such as: (a) the description of mechanical and physical short fatigue crack extension which is characterised by yielding conditions which do not permit the application of the common ΔK concept and by the gradual build-up of the crack closure effect, (b) a consistent methodology for determining the initial crack size, (c) based on this, the determination of a fatigue limit, (d) the treatment of multiple crack propagation at load levels above this limit, (e) the variation of the local geometry along the weld toe, and (f) statistical effects.The paper gives alimited overview of the work the authors did in this field during the last years within the German project cluster IBESS. A model is presented and briefly discussed which covers the questions above. T2 - XV Portugese Conference on Fracture CY - Lissabon, Portugal DA - 10.02.2016 KW - Weldments KW - fatigue strength KW - fracture mechanics KW - fatigue crack propagation PY - 2016 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-361571 UR - http://www.sciencedirect.com/science/article/pii/S2452321616000044 DO - https://doi.org/doi:10.1016/j.prostr.2016.02.003 VL - 2016/1 SP - 10 EP - 17 PB - Elsevier B.V. CY - Amsterdam, Netherlands AN - OPUS4-36157 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Zerbst, Uwe ED - Baumgartner, J. ED - Melz, T. T1 - Assessment of welded joints by fracture mechanics IBESS - the development of a procedure N2 - The idea to determine the fatigue strength of weldments by means fracture mechanics was originally based on the empirical observation that the major portion of the fatigue life in weldments is frequently spent in crack propagation. The present paper gives a brief overview on the basic principles of fracture mechanics-based determination of fatigue strength and on special features which have to be considered for weldments. Based on this information, the ongoing research project IBESS is introduced and briefly reviewed. T2 - SoSDiD - 4th Symposium on structural durability in Darmstadt CY - Darmstadt, Germany DA - 2014-05-14 KW - Fracture mechanics KW - Fatigue strength KW - (Residual) lifetime KW - Weldments PY - 2014 SP - 49 EP - 66 PB - Fraunhofer Verlag AN - OPUS4-31321 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zerbst, Uwe A1 - Madia, Mauro A1 - Beier, H.T. T1 - A model for fracture mechanics based prediction of the fatigue strength: Further validation and limitations N2 - Recently two of the authors of the present paper proposed a model for a fracture mechanics based prediction of the S–N characteristics of metallic components with large microstructural defects and supported this by a validation exercise on tensile plates made of an aluminium alloy AL5380 H321. Here the authors extend the study using a number of further data sets from the literature for which data were available at different R ratios. These data include two aluminium alloys, Al 2024-T3 and Al 7075-T6, and a ductile cast iron, EN-GJS- 400-18-LT. Despite of necessary assumptions for the compensation of partially missing input information the results were fairly reasonable with the exception of one data set. The authors identify high applied stress levels in combination with potential multiple crack initiation as the probable root of the problem and propose a scheme how the model can be extended for taking into account crack initiation. KW - Fatigue strength KW - S–N curve KW - Fracture mechanics KW - Crack propagation KW - Short cracks PY - 2014 UR - http://ac.els-cdn.com/S0013794413003901/1-s2.0-S0013794413003901-main.pdf?_tid=1403b676-b8a0-11e3-9087-00000aab0f26&acdnat=1396248522_d8c91133aa860e68196d9325c22ce651 DO - https://doi.org/10.1016/j.engfracmech.2013.12.005 SN - 0013-7944 SN - 1873-7315 SP - 1 EP - 17 PB - Elsevier Science CY - Kidlington AN - OPUS4-30452 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Madia, Mauro A1 - Arafah, D. A1 - Zerbst, Uwe T1 - Reference load solutions for plates with semi-elliptical surface cracks subjected to biaxial tensile loading N2 - The yield or limit load is a key parameter with respect to the accuracy of flaw assessment based on R6 type procedures such as the R6 routine, the SINTAP and FITNET method, the standard BS 7910 and others. In a number of previous papers two of the present authors proposed the use of a reference load instead of the common limit load, which not only provided more exact fracture mechanics predictions, but showed also a wider and more general application range than the conventional parameter. Here the method has been extended to biaxial tensile loading and it has been successfully validated by a thorough comparison with finite element results and alternative solutions available in the literature. KW - Flaw assessment KW - R6 procedure KW - Limit load KW - Reference load KW - Biaxial tensile loading PY - 2014 DO - https://doi.org/10.1016/j.ijpvp.2014.02.004 SN - 0308-0161 VL - 119 SP - 19 EP - 28 PB - Applied Science Publ. Ltd. CY - Barking AN - OPUS4-31429 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zerbst, Uwe A1 - Schödel, M. A1 - Beier, H.T. T1 - Parameters affecting the damage tolerance behaviour of railway axles N2 - The paper provides a discussion on damage tolerance options applied to railway axles and factors influencing the residual lifetime as well as the required inspection interval. These comprise material properties such as the scatter of the da/dN–ΔK curve, the fatigue crack propagation threshold ΔKth and the toughness of the material. Parameters affecting axle loading such as the press fit, rotating bending, load history and mixed crack opening modes are discussed. Finally the influence of the initial crack geometry on residual lifetime is simulated. KW - Railway axles KW - Damage tolerance KW - Fatigue crack propagation PY - 2011 DO - https://doi.org/10.1016/j.engfracmech.2010.03.013 SN - 0013-7944 SN - 1873-7315 VL - 78 IS - 5 SP - 793 EP - 809 PB - Elsevier Science CY - Kidlington AN - OPUS4-22491 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Madia, Mauro A1 - Beretta, S. A1 - Schödel, M. A1 - Zerbst, Uwe A1 - Luke, M. A1 - Varfolomeyev, I. T1 - Stress intensity factor solutions for cracks in railway axles N2 - The aim of this paper is a collection of stress intensity factor solutions for cracks in railway axle geometries which the authors of the present special issue developed and/or used for damage tolerance analyses. These solutions comprise closed form analytical as well as tabled geometry functions and they refer to solid as well as hollow axles and various crack sites such as the T- and V-notch and the axle body. KW - Railway axles KW - Stress intensity factor PY - 2011 DO - https://doi.org/10.1016/j.engfracmech.2010.03.019 SN - 0013-7944 SN - 1873-7315 VL - 78 IS - 5 SP - 764 EP - 792 PB - Elsevier Science CY - Kidlington AN - OPUS4-22495 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zerbst, Uwe A1 - Beretta, S. T1 - Failure and damage tolerance aspects of railway components N2 - Railway structures such as rails and axles are safety relevant components since any failure includes the risk of catastrophic derailment. This paper gives a brief overview on the most important potential failure scenarios driven by fatigue crack initiation and propagation and discusses the effects of important influencing factors such as vehicle weight and speed, track quality and environmental conditions. The present paper summarizes earlier work of the authors in this field. KW - Railway rails KW - Railway axles KW - Fatigue crack propagation KW - Damage tolerance KW - Fracture mechanics PY - 2011 DO - https://doi.org/10.1016/j.engfailanal.2010.06.001 SN - 1350-6307 SN - 1873-1961 VL - 18 IS - 2 SP - 534 EP - 542 PB - Elsevier Science Publ. CY - Oxford AN - OPUS4-22639 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Madia, Mauro A1 - Kiyak, Yusuf A1 - Zerbst, Uwe T1 - Extended parametric equations for weld toe stress concentration factors and through-thickness stress distributions in butt-welded plates subject to tensile and bending loading N2 - Based on a large set of 2D finite element analyses, parametric equations for weld toe stress concentration factors and through-thickness stress profiles are provided for butt-welded plates. These cover Single-Vand Double-V joints subject to tensile and bending loading. Compared to the most widespread solutions in the literature, which have also been tested against the finite element data in this work, the application range is extended particularly with respect to the weld toe radius(0.1≤ρ≤4 mm)andangle(10 °≤α≤60 °). Furthermore, two values of excess weld metal are considered (h=0.75;2.5mm). The analyses are performed for a plate thickness of 10 mm. Besides the extended validity range, the proposed equations show also an improved accuracy compared to the existing solutions. KW - Butt welds KW - Weld toes KW - Stress analysis KW - Structures PY - 2016 DO - https://doi.org/10.1007/s40194-016-0377-x VL - 60 IS - 6 SP - 1247 EP - 1259 AN - OPUS4-37959 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -