Translating the material fracture resistance into representations in welded tubular structures

Qian, Xudong; Zhang, Yang

doi:10.1016/j.engfracmech.2015.02.023

Cited by 13 publications

(4 citation statements)

References 68 publications

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“…Extensive experimental evidences [1][2][3][4] reveal that ductile fracture has emerged as a predominant failure mode in hollow section connections under tension. However, engineering assessments of fracture failures in welded tubular connections face a number of fundamental barriers, including the scalability of the material fracture toughness to the fracture resistance in large-scale structural connections and the representation of the fracture failure under varying levels of triaxial and deviatoric stresses.…”

Section: Introductionmentioning

confidence: 99%

Simulation of ductile fracture in welded tubular connections using a simplified damage plasticity model considering the effect of stress triaxiality and Lode angle

Wang

Chen

et al. 2015

Journal of Constructional Steel Research

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Section: Introductionmentioning

confidence: 99%

Simulation of ductile fracture in welded tubular connections using a simplified damage plasticity model considering the effect of stress triaxiality and Lode angle

Wang

Chen

et al. 2015

Journal of Constructional Steel Research

Self Cite

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“…Based on the above theoretical research, Qian [4] conducted an experimental study on the fracture failure of high-strength steel x-shaped joint under bending force in the plane. Based on the integration theory and test results, Qian [5] established the stress and deformation mechanism of x-shaped and k-shaped joints intersecting each other based on the phenomenon of unstable fracture failure after the ductile crack growth in 2015. In 2013, tong le wei [6] carried out unidirectional static loading on full lap kk-shaped space joints and carried out finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of complex tubular joints of Beijing New Airport Terminal C type column

et al. 2019

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The numerical simulation analysis of the two groups of fullscale complex tubular joints of the Beijing New Airport Terminal C type steel column under space static loading tests has been conducted by adopting software ABAQUS. The results obtained from the numerical simulation analysis consistent with those from the tests which enriched the research findings. Based on the research, mechanical performance of the joints has been carried out, the failure modes and ultimate bearing capacity of the joints with no stiffening ribs, three stiffening ribs and five stiffening ribs has been obtained. The numerical simulation results showed that, the bearing capacity of the joints without stiffening ribs were relatively low, the plastic failure of the main pipe was the major form of the destruction and the safety performance were too poor to meet the actual needs of the project. The bearing capacity of the joints significantly improved with the stiffening ribs set inside and the destruction changed to the connection of the main tubular and the branch, which means that the stress of the joints has been obviously improved by the setting of the stiffening ribs and was able to meet the needs of Beijing New Airport Terminal C type column. Through the comparative analysis of the stiffening ribs setting, it can be found that the bearing capacity of the joints were similar between the three and five stiffening ribs, considering the construction difficulty and economic benefits, three stiffening ribs has been selected as the final optimization result.

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“…Previously reported pipeline failures 1-3 reveal crack-like defects on the external surface and near the weld toe region caused either by the repeated fatigue actions or corrosion. 11 The geometry and plasticity-induced constraint loss can lead to significant differences in the near tip stress triaxiality between a surface crack front and a deeply cracked fracture specimen. 4 The ductile tearing assessment in a typical engineering critical assessment procedure requires a detailed description of the material fracture resistance, measured by the J-Δa curve.…”

Section: Introductionmentioning

confidence: 99%

“…The transferability of the specimen or material J-Δa curve to the fracture resistance in a structural component thus represents the critical challenge in the structural integrity assessments. 11 The geometry and plasticity-induced constraint loss can lead to significant differences in the near tip stress triaxiality between a surface crack front and a deeply cracked fracture specimen. [12][13][14] Such constraint difference will impose a marked effect on the measured J-Δa curve.…”

Section: Introductionmentioning

confidence: 99%

An η‐compliance method to estimate the J‐Δa curve for pipes with a circumferential surface crack

Parool

Qian

Koh

2017

Fatigue Fract Eng Mat Struct

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This paper presents an η‐compliance method to measure the J‐Δa curve for pipes with a circumferential surface crack, using the experimentally recorded load versus the crack mouth opening displacement (CMOD) relationship. This study modifies the η method commonly practiced for standard through‐thickness fracture specimens to measure the energy release rate, J, from P‐CMOD curve for pipes with a circumferential surface crack. The non‐dimensional parameter η for the surface‐cracked pipes derives from elastic–plastic finite element analyses. The relationship between the crack size and the CMOD‐based compliance, coupled with crack profiles interpolated linearly between the fatigue crack profile and the crack profile after ductile tearing, allows determining the crack depth corresponding to the measured CMOD compliance. The measured location‐specific J‐Δa curves indicate consistency with the fracture resistance curve measured from through‐thickness fracture specimens at small crack extension levels. The difference between the fracture resistances becomes significantly larger as the crack extends beyond 0.5 mm.

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Translating the material fracture resistance into representations in welded tubular structures

Cited by 13 publications

References 68 publications

Simulation of ductile fracture in welded tubular connections using a simplified damage plasticity model considering the effect of stress triaxiality and Lode angle

Simulation of ductile fracture in welded tubular connections using a simplified damage plasticity model considering the effect of stress triaxiality and Lode angle

Numerical simulation of complex tubular joints of Beijing New Airport Terminal C type column

An η‐compliance method to estimate the J‐Δa curve for pipes with a circumferential surface crack

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