A proposal for the onset of chip segmentation in machining

Sonntag, Robert; Chandrasekaran, N.

doi:10.1016/0921-5093(89)90541-8

Cited by 14 publications

(8 citation statements)

References 16 publications

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“…[34,35]). The most classical of them are the chip segmentation frequency and the chip segmentation length.…”

Section: Evaluation Of the Chip Segmentation Intensity Using The New mentioning

confidence: 96%

“…), while up to 90th analytical approaches are the main proposed analyses (e.g. [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]). Using an analytical modelling, Sowerby and Chandrasekaran [34] proposed a factor based on the damage accumulation, to detect the onset of chip segmentation.…”

Section: Introductionmentioning

confidence: 99%

“…Clearly, the estimation of the CR parameter is valid only for continuous chips. Besides, the other parameters such as CAD: ''critical accumulated damage parameter'' introduced by Sowerby and Chandrasekaran [34] and the ''FLP: Flow Localisation Parameter'' by Xie et al [35] can be used only as indicators of the onset of the shear instability. So, usually the chip morphology is described qualitatively as continuous, serrated, segmented or fragmented morphology.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of a new Segmentation Intensity Ratio “SIR” to characterize the chip segmentation process in machining ductile metals

Atlati

Haddag

Nouari

et al. 2011

International Journal of Machine Tools and Manufacture

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“…[34,35]). The most classical of them are the chip segmentation frequency and the chip segmentation length.…”

Section: Evaluation Of the Chip Segmentation Intensity Using The New mentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of a new Segmentation Intensity Ratio “SIR” to characterize the chip segmentation process in machining ductile metals

Atlati

Haddag

Nouari

et al. 2011

International Journal of Machine Tools and Manufacture

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“…Obtaining complete stress solutions become imperative, in order to use the grid distortion data to estimate damage during upset forging and to predict failure (Sowerby and Chandrasekaran 1986a, b). Other applications that demand complete solutions include predictions relating to chip segmentation during machining (Sowerby and Chandrasekaran 1989), machinability (Sathyanarayanan et al 1989;Subramanian et al 1987), etc. based on a void growth model (Sowerby and Chandrasekaran 1986a).…”

Section: Introductionmentioning

confidence: 99%

A new computational strategy for analysing plastic deformation processes

Chandrasekaran

1992

Bull. Mater. Sci.

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The paper describes a computer-based methodology for evaluating various strain and stress components within the body of a material undergoing plastic deformation. The strategy uses as input the grid distortion data, which provides the magnitudes of macroscopic particle velocities at discrete (nodal) points. To facilitate computation of the various strain-rate and strain components by explicit differentiation, B-spline functional relationships have been established for this data employing interpolating techniques. Numerical solutions obtained using this methodology have been compared with FEM predictions, which indicate that the results are in good agreement. Further, using plasticity theory, a set of partial differential equations have been established to describe the stress gradients induced due to materials processing. The mathematical formulations in the work are described only in polar coordinates, but the program VISlO can also handle tla~ nodal displacements prescribed in rectangular coordinates too.

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“…Sowerby and Chandrasekaran [24] presented a method to predict the chip segmentation using a critical damage factor. Later, Marusich and Ortiz [25] estimated the crack propagation in serrated chip using the dynamic fracture factor together with the maximum loop stress criterion.…”

Section: Introductionmentioning

confidence: 99%

Onset and evolution of discontinuously segmented chip flow in ultra-high-speed cutting Ti-6Al-4V

et al. 2016

Int J Adv Manuf Technol

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Increasing the cutting speed to an ultra-high level usually gives rise to a chip flow transition from continuously serrated to discontinuously segmented, which is one of the most fundamental and challenging problems in metal cutting. In this work, we experimentally performed the ultra-high-speed cutting on Ti-6Al-4V with a maximum cutting speed of 210 m/s, focusing on the physical phenomena accompanying the discontinuously segmented chip flow. It reveals that the discontinuously segmented chip flow can be attributed to the shear fracture induced by the fully matured shear banding, and there exists a ductile-brittle transition of the shear fracture as the cutting speed increases to an ultra-high level. In addition, the critical condition for the onset of segmented chip flow is presented using the momentum diffusion-based shear band evolution model, which gives good prediction for the chip segmentation.

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A proposal for the onset of chip segmentation in machining

Cited by 14 publications

References 16 publications

Analysis of a new Segmentation Intensity Ratio “SIR” to characterize the chip segmentation process in machining ductile metals

Analysis of a new Segmentation Intensity Ratio “SIR” to characterize the chip segmentation process in machining ductile metals

A new computational strategy for analysing plastic deformation processes

Onset and evolution of discontinuously segmented chip flow in ultra-high-speed cutting Ti-6Al-4V

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