Round robin study on structural hot-spot and effective notch stress analysis

Fricke, Wolfgang; Bollero, Andrea; Chirica, Ionel; Garbatov, Y.; Jancart, Fabrice; Kahl, Adrian; Remes, Heikki; Rizzo, Cesare Mario; Selle, Hubertus von; Urban, A.; Wei, Liwu

doi:10.1080/17445300802371261

Cited by 36 publications

(18 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…an extrapolation of the stress towards the local notch in the area of almost linear stress increase ( Fig. 3 (a)), 2. the linearization of the stress either through the plate thickness or in a section through the fillet weld ( The applicability of different structural stress approaches has been proven by a number of comparative studies for non-load carrying [25,26] and load-carrying fillet welded structures [33,34], and of round-robin studies [35,36].…”

Section: Structural Stress Methodsmentioning

confidence: 99%

Application of local approaches to the assessment of fatigue test results obtained for welded joints at sub-zero temperatures

Braun

Milaković

Renken

et al. 2020

International Journal of Fatigue

Self Cite

View full text Add to dashboard Cite

Several studies have found significant increase in the fatigue strength of welded joints of structural steels at subzero temperatures. This study addresses the research by investigating the applicability of local fatigue assessment methods to welded joints exposed to sub-zero temperatures. For this purpose, fatigue test results of two fillet weld details with weld toe and weld root failure are evaluated at a range of temperatures using a variety of structural hot-spot and notch stress approaches, then are compared to the nominal stress approach. Large differences in prediction accuracy are found for the analysed assessment methods and both failure locations.Effective notch stress © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

show abstract

Section: Structural Stress Methodsmentioning

confidence: 99%

Application of local approaches to the assessment of fatigue test results obtained for welded joints at sub-zero temperatures

Braun

Milaković

Renken

et al. 2020

International Journal of Fatigue

Self Cite

View full text Add to dashboard Cite

show abstract

“…Ilustração da concentração de tensão não linear obtida via simulação computacional. Fonte: Fricke et al [22].…”

Section: Soldagem and Inspeção 2017;22(3):281-299unclassified

“…As recentes pesquisas [22] têm demonstrado que o entalhe irregular na junta soldada pode ser substituído por um raio de 1 mm, conforme Figura 9, apresentando resultados plausível de estimativas estatísticas confiáveis. Com o desempenho crescente do potencial computacional é esperado um aumento da aplicação desses métodos, uma vez que as incertezas da determinação das tensões residuais ainda são existentes.…”

Section: Figuraunclassified

See 1 more Smart Citation

Previsões de Vida Fadiga Segundo Normas Técnicas: uma Revisão Crítica

Tremarin

Pravia

2017

Soldag. insp.

View full text Add to dashboard Cite

Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado.Recebido: 27 Jun., 2017 Aceito: 03 Out., 2017 E-mails: ronaldo.tremarin@erechim. ifrs.edu.br (RCT), zacarias@upf.br (ZMCP)Resumo: O principal objetivo deste trabalho é mostrar aos especialistas envolvidos com estruturas soldadas submetidas a esforços cíclicos uniaxiais e multiaxiais, proporcionais ou não proporcionais, as opções existentes para previsão de vida em fadiga para juntas soldadas. Apresentam-se as normas, Eurocode 3 -IIW-AASHTO e BS 5400, com suas características específicas e uma revisão das metodologias computacionais desenvolvidas nos últimos anos. Para avaliar as normas apresentadas, analisa-se dois casos de previsão de vida em fadiga, uma chapa e uma viga I, nas diferentes normas. Identificou-se as similaridades e discrepâncias entre as normas, acerca dos principais parâmetros constitutivos, a previsível semelhança entre as previsões de vida em fadiga obtidas via IIW e Eurocode 3 e as significativas diferenças entres AASHTO e BS 5400 em decorrência da filosofia de cada norma. Palavras-chave:Fadiga; Solda; Prescrição de normas. Life Predictions Fatigue According to Technical Norms: a Critical ReviewAbstract: The main objective of this work is to show to the specialists involved welded structures subjected to cyclic uniaxial and multiaxial stresses proportional or non-proportional to the existing options for fatigue life prediction for welded joints that deals with the subject. Each of the standards (Eurocode 3 -IIW-AASHTO and BS 5400) has specific characteristics, some of them very distinct as well as a review of the computational methodologies developed in recent years. To evaluate the standards presented a case of fatigue life prediction of a plate top in I -beam I in the different standards. The similarities and discrepancies between the standards, the main constitutive parameters, the predicted similarity between fatigue life forecasts obtained through IIW and Eurocode 3, and the significant differences between AASHTO and BS 5400 were identified as a result of the philosophy of each standard. Key-words:Fatigue; Weld; Standards. IntroduçãoAo projetar juntas metálicas soldadas, visando à resistência à fadiga, é possível reduzir a ocorrência de falhas catastróficas e aumentar a vida útil do produto, proporcionando a produção de estruturas de aço, pontes, máquinas e outros equipamentos, com adequada segurança operacional e vida útil.O processo de soldagem implica na elevada taxa de transferência de calor, para formação das soldas e, por consequência, das conexões estruturais. Tal situação resulta na formação da Zona Afetada pelo Calor (ZAC), inserção de tensões residuais e outras alterações termo-metalúrgicas, ocorrendo a deterioração das propriedades mecânicas: ductilidade, tenacidade e outras no metal base -MB [1,2]. A relaçã...

show abstract

“…However, the S s estimate is FE type and mesh size sensitive (e.g. Fricke 2002;Fricke et al 2008Fricke et al , 2013Rizzo and Fricke 2013), meaning the FE recommendations associated with the S s -N curve have to be used. In order to solve the sensitivity issues, nodal (i.e.…”

Section: Hot Spot Structural Stress or Strain Criterionmentioning

confidence: 99%

Fatigue damage criteria classification, modelling developments and trends for welded joints in marine structures

Besten

2018

Ships and Offshore Structures

View full text Add to dashboard Cite

Fatigue is typically a governing limit state for marine structures. Welded joints are the weakest links in that respect. Physics involve several resistance dimensions, a range of scales and distinct contributions in different stages of the accumulative damage process. Fatigue damage criteria developed over time have been classified with respect to type of information, geometry, parameter and process zone including plane and life region annotations. The criteria are evaluated regarding model (in)capabilities, showing up to what extent (governing) physics are taken into account. Modelling developments and trends towards complete strength, multi-scale and total life criteria have been identified. Incorporating all four (interacting) fatigue resistance dimensions: material, geometry, loading & response and environment translates into a complete strength fatigue damage criterion. Considering macro-, meso-and micro-scale information provides a multi-scale fatigue damage criterion. Correlation of crack initiation and growth requires matching intact and cracked geometry parameters, revealing a total life fatigue damage criterion. HIGHLIGHTS• Classification of fatigue damage criteria with respect to type of information, geometry, parameter and process zone including plane and life region annotations.• Identification of modelling developments and trends towards complete strength, multi-scale and total life fatigue damage criteria for welded joints in marine structures. NomenclatureA notch strain energy density process zone area C crack growth or fatigue resistance curve intercept (endurance coefficient) D fatigue damage E normal strain at macro-scale E Young's modulus J crack tip energy density J 1 hydrostatic stress or strain component J 2 deviatoric stress or strain component K σ crack tip stress intensity factor K ɛ crack tip strain intensity factor K' work hardening coefficient K N notch stress intensity factor K N I mode-I notch stress intensity factor K N III mode-III notch stress intensity factor K I mode-I stress intensity factor K I T total mode-I stress intensity factor K I r residual mode-I stress intensity factor K III mode-III stress intensity factor K * FE dimensionless FE based notch stress intensity factor N (total) number of cycles until failure N i number of cycles corresponding to initiation N g number of cycles corresponding to growth R notch strain energy density process zone radius S stress based fatigue damage criterion S B Battelle structural normal stress range S e effective notch stress range S eq (equivalent) Von Mises stress range S n nominal stress range S s hot spot structural stress range S T total stress range T temperature T B Battelle structural shear stress range T σS strength scatter band index W energy based fatigue damage criterion W N notch strain energy W N A notch strain energy density Y n notch factor Y f far field factor a crack size (i.e. length) a 0 critical defect size a d long-term corrosion pit size (i.e. depth) a i (real) defect or initial crack size a n (root) not...

show abstract

Round robin study on structural hot-spot and effective notch stress analysis

Cited by 36 publications

References 5 publications

Application of local approaches to the assessment of fatigue test results obtained for welded joints at sub-zero temperatures

Application of local approaches to the assessment of fatigue test results obtained for welded joints at sub-zero temperatures

Previsões de Vida Fadiga Segundo Normas Técnicas: uma Revisão Crítica

Fatigue damage criteria classification, modelling developments and trends for welded joints in marine structures

Contact Info

Product

Resources

About