Dynamic Fracture Criteria Evaluation of Bridge Structural Steel

Žiliukas, A.; Gintalas, Marius

doi:10.3846/bjrbe.2011.12

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…Paeglitis 2013); the studies frequently involve advanced methods developed and recommended for analysis of bridge emergency states (e.g. Kossakowski 2012aKossakowski , 2012bŽiliukas, Gintalas 2011).…”

Section: Introductionmentioning

confidence: 99%

Fatigue strength of an over one hundred year old railway bridge

Kossakowski

2013

The Baltic Journal of Road and Bridge Engineering

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The paper analyzes the fatigue strength of steel sampled from a railway bridge with a service life of over hundred years. The fatigue strength of the material was used to analyze the structural capacity of this railway bridge with such life expectancy operating under variable cyclic loading. The assessment was made using the requirements of the current design codes. It was found that the load-bearing capacity of structures made of materials similar to the analyzed steel may decrease significantly. In case of railway bridges and viaducts made of puddled steel with a service life exceeding 100 years, a significant reduction in the fatigue strength under normal stress is expected. Under shear stress, however, a significant excess of fatigue strength is predicted.

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Section: Introductionmentioning

confidence: 99%

Fatigue strength of an over one hundred year old railway bridge

Kossakowski

2013

The Baltic Journal of Road and Bridge Engineering

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New Equation for the Plastic Correction Factor η for J-Integral Determination from Test Results of Three-Point-Bend Specimens

Gintalas

Žiliukas

Ainsworth

2014

Materials Performance and Characterization

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When material yielding occurs, the stress intensity factor, K, no longer correctly characterizes the magnitude of the stress field around the crack tip. For significant amounts of yielding, the J-integral approach is applied as an advanced tool. In practice, for many engineering applications, the non-linear plasticity effects are of importance and therefore material behavior beyond yield needs an accurate description for input to tools for assessment. This work presents J-integral values of two different steel grades (1006 and 4340) using a newly developed analytical approach for the correction factors ηpl, which takes into account the elastic–plastic properties of the material. The evaluation approach is based on absorbed energies in a Charpy-sized specimen during the elastic and plastic deformation phases. Values of these energy terms were obtained via numerical simulation of 1006 and 4340 steel Charpy-sized specimens loaded in three-point-bending. This work highlights the effect of materials plastic properties on the J-integral. Different steel grades show different amounts of plasticity defined by the strain-hardening exponent and the strain-hardening constant and these influence the fracture parameters. Application of the plastic correction factor ηpl to Charpy-sized specimens, considering the respective plastic properties of the materials, leads to values of ηpl equal to 2.286 for 1006 steel and 2.621 for 4340 steel.

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Dynamic Fracture Criteria Evaluation of Bridge Structural Steel

Cited by 2 publications

References 11 publications

Fatigue strength of an over one hundred year old railway bridge

Fatigue strength of an over one hundred year old railway bridge

New Equation for the Plastic Correction Factor η for J-Integral Determination from Test Results of Three-Point-Bend Specimens

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