Fluid Mechanics Approach to Machining at High Speeds: Part I: Justification of Potential Flow Models

Kazban, R. V.; Mason, Joshua

doi:10.1080/10910340701696864

Cited by 11 publications

(5 citation statements)

References 15 publications

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“…Through a perturbation series approach to the Navier-Stokes equations, it is possible to show that potential flow can be used as a first approximation to model high-speed, very high-speed, or ultra-high-speed machining events, as the authors have shown in the first part of this study (Kazban and Mason, 2007). This surprising, new conclusion is dependent upon several assumptions, including…”

Section: Introductionmentioning

confidence: 78%

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Fluid Mechanics Approach to Machining at High Speeds: Part Ii: A Potential Flow Model

Kazban

Mason

2007

Machining Science and Technology

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& Finite element models of machining at high speeds usually assume that there is a stagnation point at the tool tip as is the norm in the machining community. However, at ultra-high speeds the yield strength of the workpiece is easily exceeded in the material around the tool tip, allowing that material to ''flow'' and possibly allowing the stagnation point to migrate away from the tool tip. A potential flow solution is used to model the behavior of the material around a sharp tool tip during machining at high speeds. Interestingly, the flow solution predicts that there is a stagnation point on the rake face, not at the tool tip as is usually assumed. Because the stagnation point is not at the tool tip, the flow solution predicts a significant amount of deformation in the workpiece resulting in large residual strains and a possible related temperature rise on the finished surface.

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Section: Introductionmentioning

confidence: 78%

“…0). Additional terms in the perturbation series add additional complexity and make this solution more accurate for larger Re (for details, see Kazban and Mason, 2007).…”

Section: Introductionmentioning

confidence: 99%

Fluid Mechanics Approach to Machining at High Speeds: Part Ii: A Potential Flow Model

Kazban

Mason

2007

Machining Science and Technology

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“…In the case of OHP, the reverse polarized could travel to the bulk liquid. For instance, the flowing liquid was viscid, and incompressible by the Newtonian liquid, then peristaltic flow at the PF-TENG cell-liquid interface, the continuity and Navier Stokes equations clench worthy and can be modified for the ion's drive in the IHP 51 , 52 . where ρ and υ fluid remain the density, and velocity of the working fluid, correspondingly.…”

Section: Resultsmentioning

confidence: 99%

Harvesting of flow current through implanted hydrophobic PTFE surface within silicone-pipe as liquid nanogenerator

Cheedarala

Song

2022

Sci Rep

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Harvesting of flow current through implanted hydrophobic surface within silicone pipe as liquid nanogenerators where Tap water (TW), and DI water (DIw) as liquid reservoirs to successfully convert induced mechanical energy into electrical energy. Here, we used a commercial PTFE film for the generation of a hydrophobic surface as a source of mechanical energy. The surface roughness of the hydrophobic surface is confirmed using atomic force microscopy, and contact angle analyses. The generation of power through the interaction of TW and DI with inbuilt PTFE in silicone tube is described. The higher output voltage (Voc), and short circuit currents (Isc) were attained through an interaction of TW and DIw with N-PTFE. The lower Voc, and Isc’s were produced when DI water interacts with N-PTFE electrode, whereas TW produced higher Voc and Isc’s, respectively, due to a lack of free mobile ions in DIw than TW. The TW-Sh-TENG and DIw-Sh-TENG are produced the maximum peak-to-peak Voc, and Isc of 29.5 V and 17.4 V and 3.7 μA, and 2.9 μA, respectively. Significant power output enhancement of ~ 300% from TW-Sh-TENG from DIw-N-TENG due to the formation of higher surface roughness and lead to the slipping of water droplets by super-hydrophobicity.

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“…Kazban [23] studied the change in the flow stress of duplex stainless steel with the strain rate and found that the change in flow stress is similar to that of a Newtonian fluid after a certain strain rate value. The comparison of stress-strain rate relationship between duplex stainless steel and a Newtonian fluid is shown in Figure 2.…”

Section: Shear Zone Analysismentioning

confidence: 99%

Identification of the Constitutive Parameters of Viscosity and the Prediction of the Cutting Force of S32760 Duplex Stainless Steel under a High Strain Rate

Zhang

Yang

et al. 2023

Applied Sciences

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The mechanical properties of S32760 duplex stainless steel under dynamic loading conditions at high strain rates are significantly different from those under quasi-static conditions. As a result of large strain, high strain rate, and high temperature, the analysis of the cutting process needs to factor in the influence of the viscous behavior of the material on the plastic deformation process. Based on the viscous effect of the two phases and the mixing rule, a mechanical threshold stress (MTS) constitutive model of S32760 duplex stainless steel considering the viscous effect is established to analyze the effect of strain rate on flow stress. An inverse identification method of the constitutive parameters based on Oxley's theory is proposed. The constitutive parameters of S32760 duplex stainless steel were reversely modified using an equal shear zone model and an orthogonal cutting experiment. The results show that the viscosity of the austenite phase was greater than that of the ferrite phase, and the strain rate had the greatest influence on the viscosity effect in the constitutive model. The prediction error of the constitutive model constructed in this manuscript was less than 4%, which had high accuracy.

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Fluid Mechanics Approach to Machining at High Speeds: Part I: Justification of Potential Flow Models

Cited by 11 publications

References 15 publications

Fluid Mechanics Approach to Machining at High Speeds: Part Ii: A Potential Flow Model

Fluid Mechanics Approach to Machining at High Speeds: Part Ii: A Potential Flow Model

Harvesting of flow current through implanted hydrophobic PTFE surface within silicone-pipe as liquid nanogenerator

Identification of the Constitutive Parameters of Viscosity and the Prediction of the Cutting Force of S32760 Duplex Stainless Steel under a High Strain Rate

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