Oblique surface cracking and crack closure in an orthotropic medium under contact loading

Toktaş, Selim Ercihan; Dağ, Serkan

doi:10.1016/j.tafmec.2020.102729

Cited by 13 publications

(5 citation statements)

References 66 publications

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“…Previous studies regarding purely mechanical contact loading show that the edge crack is fully open for relatively larger values of the friction coefficient. 25,53 the algorithm developed to compute contact stresses and mode-(1) and mode-(2) SIFs are provided in Figure 4.…”

Section: Finite Element Modeling and Analysismentioning

confidence: 99%

Cracking of a functionally graded coating due to sliding contact with heat generation

Balci,

Dag,

Yildirim

2023

Fatigue Fract Eng Mat Struct

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In this work, the thermal contact problem of a rigid flat punch sliding over functionally graded material (FGM) coating with a surface crack is investigated. The surface of a homogeneous isotropic substrate is ideally coated by FGM. The coefficient of friction on the contact surface is assumed to be constant, and dry Coulomb friction law is applied. The major purpose of this study is to compute the stress intensity factors at the tip of a surface crack under thermomechanical loading. In this perspective, the thermoelastic contact and the surface crack problems are modeled using finite element method. An iterative solution procedure based on finite elements is developed to solve the contact/crack problem until generated frictional heat reach the steady‐state condition. Obtained results are compared to those available in the open literature, and a good agreement is observed. Presented results involve stress intensity factors computed under various thermoelastic sliding conditions.

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Section: Finite Element Modeling and Analysismentioning

confidence: 99%

Cracking of a functionally graded coating due to sliding contact with heat generation

Balci,

Dag,

Yildirim

2023

Fatigue Fract Eng Mat Struct

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“…Moreover, Kumar et al [ 5 ] investigated the crack propagation in orthotropic plates under thermal-mechanical loading using the extended finite element method (XFEM). Toktas and Dag [ 6 ] investigated oblique surface cracking in orthotropic components. Tankasala et al [ 7 ] studied the crack propagation variations in an orthotropic solid under pure mode I loading.…”

Section: Introductionmentioning

confidence: 99%

Tensile-Tearing Fracture Analysis of U-Notched Spruce Samples

et al. 2022

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Spruce wood (Picea Mariana) is a highly orthotropic material whose fracture behavior in the presence of U-shaped notches and under combined tensile-tearing loading (so-called mixed-mode I/III loading) is analyzed in this work. Thus, several tests are carried out on U-notched samples with different notch tip radii (1 mm, 2 mm, and 4 mm) under various combinations of loading modes I and III (pure mode I, pure mode III, and three mixed-mode I/III loadings), from which both the experimental fracture loads and the fracture angles of the specimens are obtained. Because of the linear elastic behavior of the spruce wood, the point stress (PS) and mean stress (MS) methods, both being stress-based criteria, are used in combination with the Virtual Isotropic Material Concept (VIMC) for predicting the fracture loads and the fracture angles. By employing the VIMC, the spruce wood as an orthotropic material is modeled as a homogeneous and isotropic material with linear elastic behavior. The stress components required for calculating the experimental values of notch stress intensity factors are obtained by finite element (FE) analyses of the test configuration using commercial FE software from the fracture loads obtained experimentally. The discrepancies between the experimental and theoretical results of the critical notch stress intensity factors are obtained between −12.1% and −15% for the PS criterion and between −5.9% and −14.6% for the MS criterion, respectively. The discrepancies related to fracture initiation angle range from −1.0% to +12.1% for the PS criterion and from +1.5% to +12.2% for the MS criterion, respectively. Thus, both the PS and MS models have good accuracy when compared with the experimental data. It is also found that both failure criteria underestimate the fracture resistance of spruce wood under mixed-mode I/III loading.

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“…Rousseau and Tippur [26] investigated the crack tip behaviour in a compositionally graded glass-filled epoxy under low-velocity impact loading by experimentation. Toktas and Dag [27] presented an analysis of an inclined surface crack in an FGM under contact loading. Shukla et al [28] presented a comprehensive review of dynamic fracture studies in FGMs.…”

Section: Introductionmentioning

confidence: 99%

Peridynamic simulation of dynamic fracture in functionally graded materials subjected to impact load

Candaş

Öterkuş

İmrak

2021

Engineering with Computers

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Dynamic crack propagation assessment in functionally graded materials (FGMs) with micro-cracks is accomplished using bond-based Peridynamics (PD). The dynamic fracture behaviour of various FGMs' material models is studied in Kalthoff-Winkler experiment. Dynamic crack growth predictions and associated material damage of the specimen under dynamic loading conditions are considered. The effect of micro-cracks near macro-crack tips on the toughening mechanism is evaluated in terms of crack propagation velocities. Stochastically pre-located micro-cracks are modelled to obtain the toughening effect in the material. Additionally, the velocities and time required for fracture are compared in different FGM cases. It is frankly found that if a crack propagates in the harder region of the specimen, velocities decrease and toughness increase in contrast to the softer region. Furthermore, micro-cracks around a macro-crack decelerate the crack propagation and enhance toughening mechanism in FGM body depending on gradation of material properties.

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Oblique surface cracking and crack closure in an orthotropic medium under contact loading

Cited by 13 publications

References 66 publications

Cracking of a functionally graded coating due to sliding contact with heat generation

Cracking of a functionally graded coating due to sliding contact with heat generation

Tensile-Tearing Fracture Analysis of U-Notched Spruce Samples

Peridynamic simulation of dynamic fracture in functionally graded materials subjected to impact load

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