Calculation-experimental method for determining crack resistance of materials under biaxial loading

Boiko, A. V.; Karpenko, L. N.; Лебедев, А. А.; Muzika, N.R.; Zagornyak, Oleg

doi:10.1016/s0013-7944(99)00064-8

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…When the restraints imposed on the outer boundaries are close to the case of displacement-controlled loading, the fracture response strongly depends on the crack length both in the quantitative and qualitative senses [45]. Earlier it was shown [15] that the asymptotic values of the energy dissipation rate R for the MM(T) and MM(T-TC) specimens (Fig.…”

Section: Fig (5) Problem Domains Abcd Attached To Different Loadingmentioning

confidence: 99%

Displacement-Based Assessment of Ductile Tearing under Low-Constraint Conditions

Naumenko¹,

Lenzion²,

Limansky³

2008

TOMEJ

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This paper deals with several issues in the ductile tearing assessment relevant to the fracture criteria and test methods covering the determination of the crack growth resistance under low-constraint conditions. Specifically, the effects of the specimen geometry and size, type and length of the original stress raiser, boundary restraints, load biaxiality, loading history, and plastic anisotropy were studied experimentally. With regard to the problem of transferring crack growth data, our results demonstrate that underlying assumptions of the current concept of ductile tearing evoke a suspicion from different points of view. To clarify the reasons for a gap between the model descriptions and measurements, we put forward an innovative engineering concept enabling through-life assessment of the fracture process in sheet metals.

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Section: Fig (5) Problem Domains Abcd Attached To Different Loadingmentioning

confidence: 99%

Displacement-Based Assessment of Ductile Tearing under Low-Constraint Conditions

Naumenko¹,

Lenzion²,

Limansky³

2008

TOMEJ

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“…Moreover, calcium as a surface-active additive tends to come out of the phase and crystallite volumes onto a newly formed surface. The studies [7,9] are devoted to the macrostructure quality evaluation of 13G1SU steel castings treated with calcium-containing wire, practically defect-free, along the segregated bands of point discontinuity, axial and "clustered" cracks, and surface carbonization.…”

mentioning

confidence: 99%

“…Thus, in view of the thermodynamic activity of a calcium modifier to such detrimental elements as phosphorus and sulfur, note that the removal and bonding of contaminating impurities dissolved in steel into stable compounds with simultaneous globularity of nonmetallic inclusions are caused by the calcium effect on ductile steel properties, in particular fracture toughness, which can also be influenced by a stress state and residual stress levels [9,10]. As was shown in [5,6] and other studies of the calcium effect on the quality of shipbuilding steels, the maximum ductility level and the mildest contamination with nonmetallic inclusions are ensured at calcium contents within 0.002-0.004%.…”

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confidence: 99%

Physicomechanical Aspects of Structural Steel Long-Term Service in Seawater

et al. 2021

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Results of studying the effect of a calcium modifier of 10KhSND low-alloy steel on its physicomechanical characteristics are presented. The rolled sheets of commercially produced shipbuilding steel, wherein before teeming during melting a ferroalumocalcium alloy was added, were used for investigation. The corrosion rate of examined steel in a model aggressive medium, as well as its fatigue resistance in salt water in torsion, axial loading, and bending tests against the calcium concentration, was elucidated. The effect of calcium concentrations on the austenite grain sizes and dispersity of nonmetallic inclusions, as well as the fracture toughness characteristics (critical stress intensity factor and crack opening) at different temperatures was examined. The microstructure of fracture facets of shipbuilding steel specimens of long-term service on brittle fracture along pearlite grains and ductile fracture along ferrite ones for as-received steel was revealed. Nonmetallic inclusions in specimen fractures of shipbuilding steel at different calcium concentrations were studied. Their quantity grows considerably with its service terms, which exerts negative influence on the corrosion and mechanical properties of the metal. The calcium alloying of steel is shown to contribute to its corrosion resistance and fracture toughness on long-term service in seawater. The recommendations are given as regards optimal modifier concentrations in the shipbuilding metal, which is consistent with minimum austenite grain sizes and dispersity of nonmetallic inclusions.

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Some Mechanical Characteristics of Structural Steels of Cooling Systems of Continuous Operation

2021

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Calculation-experimental method for determining crack resistance of materials under biaxial loading

Cited by 8 publications

References 3 publications

Displacement-Based Assessment of Ductile Tearing under Low-Constraint Conditions

Displacement-Based Assessment of Ductile Tearing under Low-Constraint Conditions

Physicomechanical Aspects of Structural Steel Long-Term Service in Seawater

Some Mechanical Characteristics of Structural Steels of Cooling Systems of Continuous Operation

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