Modelling the static stress–strain state around the fan-structure in the shear rupture head

Тарасов, Б. Г.; Sadovskii, V. M.; Sadovskaya, O. V.; Cassidy, Mark; Randolph, Mark

doi:10.1016/j.apm.2018.01.020

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…Even if the component itself works under a uniaxial load, notches or corrosion defects of the complex lead to a multiaxial stress state in local area, which leads to fatigue failure [1][2][3][4][5][6]. Therefore, the study of multiaxial fatigue is much closer to the engineering practice than that of uniaxial fatigue, and how to prevent multiaxial fatigue failure becomes extremely important in engineering practice [7,8]. Multiaxial fatigue refers to the fatigue under the action of multiple stresses or strains.…”

Section: Introductionmentioning

confidence: 99%

Fatigue and Life Prediction of S135 High-Strength Drill Pipe Steel under Tension–Torsion Multiaxial Loading

et al. 2022

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This paper investigates the fatigue behavior of S135 high-strength drill pipe steel under tension–torsion multiaxial loading. Based on the concept of critical plane during fatigue, the fatigue model under the combined loading of tension–torsion is established. The proposed model is validated, and the predicted results are in good agreement with the experimental testing results. The maximum relative errors between the estimation and the experiment are mostly within the range of factor two to three for proportional, and 90° non-proportional tension–torsion loading. Meanwhile, the failure mechanism is also discussed through fracture analysis.

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Section: Introductionmentioning

confidence: 99%

Fatigue and Life Prediction of S135 High-Strength Drill Pipe Steel under Tension–Torsion Multiaxial Loading

et al. 2022

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“…In the past few years, mathematical models have been adopted to study the stress-strain response of soils [23][24][25][26][27][28][29][30][31]. In term of the stress-strain behaviors of cemented soil, a large number of researches have been reported [2,3,5,6,[13][14][15][16][17][18][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Models for Stress–Strain Behavior of Nano Magnesia-Cement-Reinforced Seashore Soft Soil

Wang

Zhang

et al. 2020

Mathematics

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The stress–strain behavior of nano magnesia-cement-reinforced seashore soft soil (Nmcs) under different circumstances exhibits various characteristics, e.g., strain-hardening behavior, falling behavior, S-type falling behavior, and strong softening behavior. This study therefore proposes a REP (reinforced exponential and power function)-based mathematical model to simulate the various stress–strain behaviors of Nmcs under varying conditions. Firstly, the mathematical characteristics of different constitutive behaviors of Nmcs are explicitly discussed. Secondly, the conventional mathematical models and their applicability for modeling stress–strain behavior of cemented soil are examined. Based on the mathematical characteristics of different stress–strain curves and the features of different conventional models, a simple mathematical REP model for simulating the hardening behavior, modified falling behavior and strong softening behavior is proposed. Moreover, a CEL (coupled exponential and linear) model improved from the REP model is also put forth for simulating the S-type stress–strain behavior of Nmcs. Comparisons between conventional models and the proposed REP-based models are made which verify the feasibility of the proposed models. The proposed REP-based models may facilitate researchers in the assessment and estimation of stress–strain constitutive behaviors of Nmcs subjected to different scenarios.

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“…The study of dynamic crack propagation has primarily been focused on comparatively homogeneous materials such as steel, glass and amorphous polymers like polymetylmetakrylat (PMMA) [12][13][14][15]. Interesting exceptions exist primarily within the area of geosciences, where dynamic crack propagation has been studied in rock and rock-like materials [16][17][18][19]. Quasi-static crack propagation in heterogeneous (though not necessarily porous) materials has been studied extensively in e.g.…”

Section: Introductionmentioning

confidence: 99%

Offsetting Losses: Bargaining Power and Rebel Attacks on Peacekeepers

2016

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Many naturally occurring materials, such as wood and bone, have intricate porous microstructures and high stiffness and toughness to density ratios. Here, the influence of pores in a material on crack dynamics in brittle fracture is investigated. A dynamic phase field finite element model is used to study the effects of pores with respect to crack path, crack propagation velocity and energy release rate in a strip specimen geometry with circular pores. Four different ordered pore distributions are considered, as well as randomly distributed pores. The results show that the crack is attracted by the pores; this attraction is stronger when there is more energy available for crack growth. Crack propagation through pores also enables higher crack propagation velocities than are normally seen in strip specimens without pores (i.e. homogeneous material), without a corresponding increase in energy release rate. It is further noticed that as the porosity of an initially solid material increases, the crack tip is increasingly likely to become shielded or arrested, which may be a key to the high relative strength often exhibited by naturally occurring porous materials. We also find that when a pore is of the same size as the characteristic internal length then the pore does not localise damage. Since the characteristic internal length only regularises the damage field and not the strain end kinetic energy distributions, crack dynamics are still affected by small pores.

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Modelling the static stress–strain state around the fan-structure in the shear rupture head

Cited by 6 publications

References 13 publications

Fatigue and Life Prediction of S135 High-Strength Drill Pipe Steel under Tension–Torsion Multiaxial Loading

Fatigue and Life Prediction of S135 High-Strength Drill Pipe Steel under Tension–Torsion Multiaxial Loading

Mathematical Models for Stress–Strain Behavior of Nano Magnesia-Cement-Reinforced Seashore Soft Soil

Offsetting Losses: Bargaining Power and Rebel Attacks on Peacekeepers

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