Load Carrying Capacities of Butt Welded Joints in High Strength Steels

Khurshid, Mansoor; Barsoum, Zuheir; Barsoum, Imad

doi:10.1115/1.4030687

Cited by 22 publications

(15 citation statements)

References 13 publications

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“…Here, ε L is the limiting triaxial strain, ε LU is uniaxial strain limit, α sl is a material parameter that is 2.2 for ferritic steel, R y is the ratio of the minimum specified yield strength divided by the minimum specified ultimate tensile strength, E s is the specified elongation, T is the stress triaxiality, (σ 1 , σ 2 , σ 3 ) are principal stresses, σ y,min is the minimum yield strength, σ UTS,min is the minimum specified ultimate tensile strength and σ vonMises is the equivalent stress. Studies of the static strength of welded joints in HSS have been carried out in. In, the effect of HAZ on butt joints of similar grade was not significant.…”

Section: Design Of Test Specimenmentioning

confidence: 99%

“…Studies of the static strength of welded joints in HSS have been carried out in. In, the effect of HAZ on butt joints of similar grade was not significant. Therefore, in this study, HAZ have been assumed similar material properties as the base material.…”

Section: Design Of Test Specimenmentioning

confidence: 99%

“…Therefore, in this study, HAZ have been assumed similar material properties as the base material. Experimental validation of the methodology adopted here can be found elsewhere in. Stress–strain curves used as material input are similar to similar grade of steel investigated in.…”

Section: Design Of Test Specimenmentioning

confidence: 99%

“…Experimental validation of the methodology adopted here can be found elsewhere in. Stress–strain curves used as material input are similar to similar grade of steel investigated in.

ε_{L} = ε_{L U} e x p ([], prefix- ((), \frac{α_{s l}}{1 + m_{2}}) ((), ({}, \frac{σ_{1} + σ_{2} + σ_{3}}{3 * σ_{italicvonMises}}) - \frac{1}{3}))

\begin{matrix} left \\ α_{s l} = 2.2 \\ m_{2} = 0.60 (1 - R_{y}) \end{matrix}

ε_{L U} = 2 . l n ((), 1 + \frac{E_{s}}{100})

R_{y} = \frac{σ_{y, m i n}}{σ_{U T S, m i n}}

T = \frac{σ_{1} + σ_{2} + σ_{3}}{3 σ_{vonMises}}

…”

Section: Design Of Test Specimenmentioning

confidence: 99%

See 3 more Smart Citations

The multiaxial weld root fatigue of butt welded joints subjected to uniaxial loading

Khurshid

Barsoum

et al. 2016

Fatigue Fract Eng Mat Struct

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A B S T R A C T In this study, the fatigue strength of inclined butt welds subjected to a proportional multiaxial stress state generated by uniaxial loading is studied in nominal and local stress concepts. The local methodologies studied included principal stress hypothesis, von Mises stress hypothesis and modified Wöhler curve method. Nominal methodologies included modified Gough-Pollard interaction equation, the design equation in Eurocode3 and the interaction equation in DNV standard. Results are evaluated along with data published in relevant literature. It is observed that both local and nominal stress assessment methods are able to estimate multiaxial fatigue strength. No obvious difference in fatigue strength is observed in the nominal stress concept, but the notch stress concept is able to capture a decrease in fatigue strength in shear-dominated joints. It is concluded that modified Wöhler curve method is a suitable tool for the evaluation of fatigue strength in joints dominated by both normal and shear stresses.Keywords fatigue strength; multiaxial stress ratio; multiaxial stress state; welded joints; weld inclination.N O M E N C L A T U R E FAT 95% = Fatigue strength corresponding to 2 × 10 6 cycles at failure with a survival probability of 95% and a confidence level of 75% FAT 50% = Fatigue strength corresponding to 2 × 10 6 cycles at failure with a survival probability of 50% and a confidence level of 75% E s = Elongation specified E = Young's modulus NA = Not applicable N f = Number of cycles to failure R = Stress ratio R y = Ratio of minimum yield to ultimate tensile strength of the material CV = Comparison value dependent on type of loading and material T = Triaxiality F = Applied load A = Weld throat area a = Weld throat size l = Weld length L = Length of flat plates t = Thickness of plates w = Specimen width w = Damage state variable f wd = Weld metal ultimate tensile strength k = Slope of SN curve k o = Slope of design SN curve Correspondence: M. Khurshid.

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Section: Design Of Test Specimenmentioning

confidence: 99%

Section: Design Of Test Specimenmentioning

confidence: 99%

Section: Design Of Test Specimenmentioning

confidence: 99%

“…Experimental validation of the methodology adopted here can be found elsewhere in. Stress–strain curves used as material input are similar to similar grade of steel investigated in.

ε_{L} = ε_{L U} e x p ([], prefix- ((), \frac{α_{s l}}{1 + m_{2}}) ((), ({}, \frac{σ_{1} + σ_{2} + σ_{3}}{3 * σ_{italicvonMises}}) - \frac{1}{3}))

\begin{matrix} left \\ α_{s l} = 2.2 \\ m_{2} = 0.60 (1 - R_{y}) \end{matrix}

ε_{L U} = 2 . l n ((), 1 + \frac{E_{s}}{100})

R_{y} = \frac{σ_{y, m i n}}{σ_{U T S, m i n}}

T = \frac{σ_{1} + σ_{2} + σ_{3}}{3 σ_{vonMises}}

…”

Section: Design Of Test Specimenmentioning

confidence: 99%

See 2 more Smart Citations

The multiaxial weld root fatigue of butt welded joints subjected to uniaxial loading

Khurshid

Barsoum

et al. 2016

Fatigue Fract Eng Mat Struct

Self Cite

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“…When the soft zone width ranges from 0.33 to 0.6 times of specimen thickness, the reduction of tensile strength of HSS butt joint is restricted to 3%-8% [3]. Once the width equals to specimen's thickness, 15% ultimate strength will be lost based on numerical analysis results [4]. In addition, from experimental study, higher heat input is usually accompanied by wider soft zone, worsen material properties in the HAZ and lower joint strength [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

12.12: Influence of welding on mechanical properties of high strength steel butt joints

et al. 2017

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In view of the fact that welding thermal cycle could adversely affect the mechanical properties of heat affected zone (HAZ) for quenched and tempered (QT) high strength steel (HSS) due to the transformation of microstructures, experiments were conducted to find out the correlation of welding heat input, hardness, microstructure and the tensile strength of HSS butt joints. Two S690 QT HSS butt joints were welded with 8mm thickness plates by shielded metal arc welding (SMAW), and 3.2mm and 5.0mm diameter electrodes were employed to achieve the conditions of different heat inputs. During welding, the thermal cycles near the weld bead were recorded by thermocouples. After the welding, the test specimens were cut out from the welded joints. Then, coupon tests were carried out to measure the tensile strength of joints. In addition, hardness tests and microstructure observation of HAZ on the well-polished specimens were conducted. The test results reveal that a soft layer was generated in the fine grain heat affected zone (FGHAZ) with a lower hardness value. Eventually, it affects tensile strength of S690 QT HSS to some extents. Additionally, it was also found that increase of heat input leads to longer cooling time and consequently higher degree of HAZ softening.

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Mesoscopic Tensile Deformation of Steel Cord with Diverse Layered Nonuniformity Based on Microcomputed Tomography Optimizing Simulation Model

Li,

Ma,

Kong

et al. 2024

steel research int.

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The finite‐element analysis plays a crucial role in enhancing the quality and predicting the safety of steel cord. The conventional parametric model for finite‐element analysis often overlooks the inhomogeneity of steel cord, making it difficult to achieve precise simulation. This article utilizes microcomputed tomography to track the mesoscopic deformation of real steel cord during stretching, reconstructing 3D digital images and quantitatively analyzing the corresponding rule for an optimized finite‐element modeling method. In comparison to the parametric model's experimental deviation of 28.37% in strain, the actual structural tensile model aligns with the tensile test with a deviation of only 2.88%, indicating high processing quality. In addition, when simulating the impact of layered nonuniformity on the fracture strain of cords, it is observed that a small degree of nonuniformity leads to an increase in compression between the cord filaments and subsequently enhances the fracture strain. This study provides a practical and dependable quantitative analysis on a mesoscopic scale to optimize the design and production of cords.

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Load Carrying Capacities of Butt Welded Joints in High Strength Steels

Cited by 22 publications

References 13 publications

The multiaxial weld root fatigue of butt welded joints subjected to uniaxial loading

The multiaxial weld root fatigue of butt welded joints subjected to uniaxial loading

12.12: Influence of welding on mechanical properties of high strength steel butt joints

Mesoscopic Tensile Deformation of Steel Cord with Diverse Layered Nonuniformity Based on Microcomputed Tomography Optimizing Simulation Model

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