An efficient methodology for fatigue damage assessment of bridge details using modal superposition of stress intensity factors

Albuquerque, Carlos; Silva, António L. L.; Jesus, Abílio M.P. De; Calçada, Rui

doi:10.1016/j.ijfatigue.2015.07.002

Cited by 37 publications

(18 citation statements)

References 24 publications

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“…The combination of these two models usually provides a faster solution with respect to the entire detailed model to achieve accurate results within the RoI. This strategy has been widely used to solve problems in different engineering fields including structural mechanics, electromagnetics, and thermofluid dynamics …”

Section: Introductionmentioning

confidence: 99%

Application of the finite element submodeling technique in a single point contact and wear problem

Curreli

Puccio

Mattei

2018

Numerical Meth Engineering

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Summary Finite element simulation is a powerful tool to study and predict the wear behavior of different mechanical systems. However, the high computational cost required to obtain accurate numerical solutions is a crucial aspect especially for large and complex models. The present study proposes a possible solution to overcome this limitation by exploiting the potentiality of the submodeling technique, whose application to wear problem is still rare in the literature. A global‐local approach for wear analysis is presented and validated for a simple pin‐on‐disk wear test. In a preliminary step, different submodeling techniques were implemented and compared. They differed for the quantity (nodal forces and/or displacements) transferred from the global model to the local one. Numerical models have been developed in Ansys® mechanical APDL using its new wear simulation and mesh smoothing routines. Results suggest that the proposed strategy can significantly reduce the computational cost of finite element wear models. Some interesting points on the use of submodeling in contact problems are also discussed.

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Section: Introductionmentioning

confidence: 99%

Application of the finite element submodeling technique in a single point contact and wear problem

Curreli

Puccio

Mattei

2018

Numerical Meth Engineering

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“…1 The safety of such infrastructures has posed a critical concern for countries residing in the cold region. [8][9][10][11][12] However, the Paris material constants used in estimating the fatigue life in these design codes derive primarily from the experimental database recorded at the room temperature. 2,3 A number of design procedures [4][5][6][7] have evolved for the fatigue prone structural details, based on a Paris type crack propagation rule, to assess the fatigue performance of steel bridges and Nomenclature: a, = crack length; a 0 , = initial crack length at the end of fatigue pre-cracking; A, = percentage of elongation at fracture; B, = thickness of the compact tension, C(T), specimen; C, = Paris-law coefficient; C 0 , = coefficient of stress intensity factor gradient method; E, = elastic modulus; f y , = yield strength; f u , = ultimate tensile strength; K I , = stress intensity factor; ΔK I , = stress intensity factor range; ΔK th , = fatigue crack propagation threshold; m, = exponent of the Paris-law; N, = number of loading cycles; P max , = maximum load; ΔP, = applied cyclic load range; R, = stress ratio; R 2 , = correlation coefficient; T, = temperature; T 27J , = fracture ductile-to-brittle transition temperature at which the Charpy impact energy is 27 J; T SA , = fracture ductile-to-brittle transition temperature at which the percent shear area of fracture surface in a Charpy specimen is 50%; T t , = fracture ductile-tobrittle transition temperature based on Boltzmann function; W, = width of compact tension, C(T), specimen; Z, = percentage of area reduction other welded steel structures.…”

Section: Introductionmentioning

confidence: 99%

“…2,3 A number of design procedures [4][5][6][7] have evolved for the fatigue prone structural details, based on a Paris type crack propagation rule, to assess the fatigue performance of steel bridges and Nomenclature: a, = crack length; a 0 , = initial crack length at the end of fatigue pre-cracking; A, = percentage of elongation at fracture; B, = thickness of the compact tension, C(T), specimen; C, = Paris-law coefficient; C 0 , = coefficient of stress intensity factor gradient method; E, = elastic modulus; f y , = yield strength; f u , = ultimate tensile strength; K I , = stress intensity factor; ΔK I , = stress intensity factor range; ΔK th , = fatigue crack propagation threshold; m, = exponent of the Paris-law; N, = number of loading cycles; P max , = maximum load; ΔP, = applied cyclic load range; R, = stress ratio; R 2 , = correlation coefficient; T, = temperature; T 27J , = fracture ductile-to-brittle transition temperature at which the Charpy impact energy is 27 J; T SA , = fracture ductile-to-brittle transition temperature at which the percent shear area of fracture surface in a Charpy specimen is 50%; T t , = fracture ductile-tobrittle transition temperature based on Boltzmann function; W, = width of compact tension, C(T), specimen; Z, = percentage of area reduction other welded steel structures. [8][9][10][11][12] However, the Paris material constants used in estimating the fatigue life in these design codes derive primarily from the experimental database recorded at the room temperature. Their validity of these parameters at a low ambient temperature requires further validation for enhanced fatigue assessment of welded components in steel bridges.…”

Section: Introductionmentioning

confidence: 99%

Fatigue crack propagation for Q345qD bridge steel and its butt welds at low temperatures

Liao

Wang

Qian

et al. 2017

Fatigue Fract Eng Mat Struct

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Steel bridges fabricated with Q345qD steels face critical challenges when operating in cold regions with a low ambient temperature. This study aims to investigate, via an experimental program, the low‐temperature fatigue crack propagation behavior of Q345qD bridge steel base material and its butt welds. The testing program comprises a series of Charpy impact tests and fatigue crack propagation tests at the room temperature, −20°C and −60°C. The experimental results demonstrate a reduced crack propagation rate in the base material, but an increasing crack propagation rate in the butt welds, with a decreasing ambient temperature. The base material also shows enhanced fatigue crack propagation thresholds with the decreasing temperature. The ductile‐to‐brittle transition temperature for fatigue is lower than that for fracture in the base material while the weld metal exhibits an opposite trend. Generally, the butt welds present higher resistance against fatigue crack propagation and larger Charpy toughness values than do the base material at all tested temperatures. The Paris‐law parameters measured at the room temperature for the base material leads to a conservative assessment of the crack propagation life for a welded joint under a low ambient temperature.

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“…Many scholars gradually adopted the fracture mechanics method to study the fatigue crack propagation of welded details with initial defect (Nagy, Wang, Culek, Van Bogaert, & De Backer, 2017). As an essential parameter in fracture mechanics, the stress intensity factor not only determines the crack growth of the welded details but also has a direct effect on the prediction accuracy of the fatigue life (Albuquerque, Silva, de Jesus, & Calçada, 2015;Duchaczek & Mańko, 2015). Many methods have been developed to solve stress intensity factors, such as analytical method, numerical method and experimental method.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Life Assessment and Reliability Analysis of Cope-Hole Details in Steel Bridges

Liao

Wang

Zhang

et al. 2020

BJRBE

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Cope-hole details are widely applied to steel bridges. However, the safety of steel bridges is influenced by the fatigue performance of welded details. So, cope-hole details with flange and web subjected to axial loads were selected as the research object. Based on the basic theory of linear elastic fracture mechanics and the Finite Element Method, the stress intensity factors of cope-holes details were calculated. The influences of geometry size and crack size of the detail on the stress intensity factors were then investigated. The Paris model of fatigue crack propagation predicted the crack propagation life of cope-hole details. Besides, the fatigue limit-state equation was also established to analyse the effect of random variables (such as initial crack size, critical crack size, crack propagation parameter) on the fatigue reliability index. Finally, the recommended value of the detection period was present. The results show that the stress intensity factor gradually increases with the increase of the cope-hole radius, the weld size, the flange plate thickness, the crack length and the web thickness. However, it gradually decreases with the increase of the ratio of the long and short axle to the crack. The predicted number of fatigue cyclic loading required by the fatigue crack depth propagating from 0.5 mm to 16 mm under nominal stress amplitude of 63 MPa is 122.22 million times. The fatigue reliability index decreases with the fatigue growth parameter, the crack shape ratio and the mean of initial crack size increasing, which is relatively sensitive. However, the variation coefficient of the initial crack size has little effect on it. The detection period of cope-hole details is the service time corresponding to the fatigue accumulated cyclic loading of 198.3 million times.

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An efficient methodology for fatigue damage assessment of bridge details using modal superposition of stress intensity factors

Cited by 37 publications

References 24 publications

Application of the finite element submodeling technique in a single point contact and wear problem

Application of the finite element submodeling technique in a single point contact and wear problem

Fatigue crack propagation for Q345qD bridge steel and its butt welds at low temperatures

Fatigue Life Assessment and Reliability Analysis of Cope-Hole Details in Steel Bridges

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