Analytical Modeling of Strain Rate Distribution During Friction Stir Processing

2007 ◽  
Vol 17 (2) ◽  
pp. 168-177 ◽  
Author(s):  
B.M. Darras ◽  
M.K. Khraisheh
Keyword(s):  
Strain Rate ◽  
Friction Stir Processing ◽  
Analytical Modeling ◽  
Rate Distribution ◽  
Friction Stir ◽  
Strain Rate Distribution

scholarly journals An An Analysis of Strain Rate Distribution Using Streamline Model and A Quick Stop Device in Metal Cutting

2019 ◽  
Vol 22 (2) ◽  
pp. 136-142
Author(s):  
Osama Ali Kadhim ◽  
Fathi A. Alshamma
Keyword(s):  
Strain Rate ◽  
Chip Formation ◽  
Metal Cutting ◽  
Equivalent Strain ◽  
Element Analysis ◽  
Rate Distribution ◽  
Equivalent Strain Rate ◽  
Cumulative Plastic Strain ◽  
Cutting Speeds ◽  
Strain Rate Distribution

In this paper, a quick stop device technique and the streamline model were employed to study the chip formation in metal cutting. The behavior of chip deformation at the primary shear zone was described by this model. Orthogonal test of turning process over a workpiece of the 6061-T6 aluminum alloy at different cutting speeds was carried out. The results of the equivalent strain rate and cumulative plastic strain were used to describe the complexity of chip formation. Finite element analysis by ABAQUS/explicit package was also employed to verify the streamline model. Some behavior of formation and strain rate distribution differs from the experimental results, but the overall trend and maximum results are approximately close. In addition, the quick stop device technique is described in detail. Which could be used in other kinds of studies, such as the metallurgical observation.

High-Strain-Rate Superplasticity in Mg-Y-Nd Alloy Prepared by Submerged Friction Stir Processing

2015 ◽  
Vol 18 (2) ◽  
pp. 312-318 ◽  
Author(s):  
Genghua Cao ◽  
Datong Zhang ◽  
Fang Chai ◽  
Wen Zhang ◽  
Cheng Qiu
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Friction Stir Processing ◽  
High Strain ◽  
Friction Stir

scholarly journals Study of the Shear Strain and Shear Strain Rate Progression During Titanium Machining

2018 ◽  
Vol 140 (5) ◽  
Author(s):  
Brian Davis ◽  
David Dabrow ◽  
Peter Ifju ◽  
Guoxian Xiao ◽  
Steven Y. Liang ◽  
...  
Keyword(s):  
Strain Rate ◽  
Shear Strain ◽  
Chip Formation ◽  
Chip Morphology ◽  
Machining Process ◽  
Image Correlation ◽  
Shear Strain Rate ◽  
Rate Distribution ◽  
Continuous Chip ◽  
Strain Rate Distribution

Machining is among the most versatile material removal processes in the manufacturing industry. To better optimize the machining process, the knowledge of shear strains and shear strain rates within the primary shear zone (PSZ) during chip formation has been of great interest. The objective of this study is to study the strain and strain rate progression within the PSZ both in the chip flow direction and along the thickness direction during machining equal channel angular extrusion (ECAE) processed titanium (Ti). ECAE-processed ultrafine-grained Ti has been machined at cutting speeds of 0.1 and 0.5 m/s, and the shear strain and the shear strain rate have been determined using high speed imaging and digital image correlation (DIC). It is found that the chip morphology is saw-tooth at 0.1 m/s while continuous at 0.5 m/s. The cumulative shear strain and the incremental shear strain rate of the saw-tooth chip morphology can reach approximately 3.9 and 2.4 × 103 s−1, respectively, and those of the continuous chip morphology may be approximately 1.3 and 5.0 × 103 s−1, respectively. There is a distinct peak shift in the shear strain rate distribution during saw-tooth chip formation while there is a stable peak position of the strain rate distribution during continuous chip formation. The PSZ thickness during saw-tooth chip formation is more localized and smaller than that during continuous chip formation (28 versus 35 μm).

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