Assessment of fatigue strength of weld root in ship structure: an approximate procedure

Petinov, S.V.; Kim, W. S.; Paik, Young-Min

doi:10.1533/saos.2005.0002

Cited by 10 publications

(4 citation statements)

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“…For reference, configuration and results of fatigue testing of welded specimens reported in (Petinov, et al, 2006) were used for numerical simulation of fatigue. The damage accumulation was based on the elastic-plastic cyclic properties of the material; the crack shape and extensions were simulated until almost complete failure of the joint, when the crack approached the outer surface of the weld and propagated along the weld in the throat plane.…”

Section: Development Of the Approachmentioning

confidence: 99%

“…The specimen characteristics and loading mode given in (Petinov, et al, 2006), Fig. 5, were used to design the FE model of the joint.…”

Section: Development Of the Approachmentioning

confidence: 99%

“…The fracture modes in (Petinov et al, 2006) were indicated only schematically; therefore the fractographic observations revealed in testing of similar fillet-welded joints where fatigue cracks propagated from the weld root (Fricke, et al, 2004) were used to support the above assumption, Fig. 6.…”

Section: Development Of the Approachmentioning

confidence: 99%

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Fatigue crack growth assessment by FEA-based simulation of damage accumulation

Petinov

Guchinsky

Korolev

2014

Proceedings of the International Conference „Innovative Materials, Structures and Technologies”

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Abstract. Fatigue crack extensions are typically predicted by application of the Linear fracture mechanics techniques. However, there is a problem of numerical estimations of the crack three-dimensional shape and front extension, which becomes insoluble when the crack approaches the back face of the analyzed detail. Also, considering material plasticity, especially at the stage preceding the through thickness crack extension or complete fracture of a detail, is beyond the scope of the technique. An approach based on the FEA simulation of fatigue damage accumulation has been developed. It allows assessing the crack initiation and propagation until complete failure of the detail affected. The approach is illustrated considering the example of fatigue failure of the non-continuous fillet-welded joint with incomplete penetration of weld material. The crack initiation in the cavity, its three-dimensional shape formation and evolution are simulated taking into account the elastic-plastic cyclic deformation of weld material until almost complete failure of the joint. The results of the analysis are in good agreement with the published experimental data.

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Section: Development Of the Approachmentioning

confidence: 99%

“…The specimen characteristics and loading mode given in (Petinov, et al, 2006), Fig. 5, were used to design the FE model of the joint.…”

Section: Development Of the Approachmentioning

confidence: 99%

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Fatigue crack growth assessment by FEA-based simulation of damage accumulation

Petinov

Guchinsky

Korolev

2014

Proceedings of the International Conference „Innovative Materials, Structures and Technologies”

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“…To determine fatigue strength of detail under action of stresses with asymmetric cycles [16,17] various types diagrams are developed. The most common diagrams are: а) diagram of limit stresses of cycle in coordinates σ max , σ min -σ m (Smith chart); b) diagram of limit amplitudes of cycle in coordinates σ α -σ m (Haigh diagram).…”

Section: Introductionmentioning

confidence: 99%

Approximation of limit amplitude diagram for destructive elements of safety devices

et al. 2020

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The maximum stress of the cycle should be limited not by yield strength but by tensile strength of detail material intended to be destructed. Therefore, such widespread linear approximations of Haigh diagram and conditions of Soderberg and Serensen-Kinasoshvili are not applicable for such details. Safety factor of fatigue strength of safety devices destructive elements should not exceed 1.0. Therefore, it is undesirable to use modified condition of Goodman for destructive elements. Two new variants of linear approximation of Haigh limit amplitudes diagram were developed. Both variants have proven their efficiency in design and operation of safety devices with destructive elements in framework of laboratory ‘Protection of metallurgical machines from breakdowns’ of the Chief mechanic department of PJSC ‘ILYICH IRON AND STEEL WORKS’ (Mariupol city, Ukraine).

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Fatigue Crack Assessment by the FEA-Assisted Simulation of Damage Accumulation

Petinov

2018

In-Service Fatigue Reliability of Structures

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Assessment of fatigue strength of weld root in ship structure: an approximate procedure

Cited by 10 publications

References 0 publications

Fatigue crack growth assessment by FEA-based simulation of damage accumulation

Fatigue crack growth assessment by FEA-based simulation of damage accumulation

Approximation of limit amplitude diagram for destructive elements of safety devices

Fatigue Crack Assessment by the FEA-Assisted Simulation of Damage Accumulation

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