Strip densification in the forward slip zone in powder rolling

1978 ◽  
Vol 17 (2) ◽  
pp. 87-90
Author(s):  
A. M. Musikhin
Keyword(s):  
Slip Zone ◽  
Powder Rolling ◽  
Forward Slip ◽  
Forward Slip Zone

scholarly journals Investigating the Contact Responses of the Roller Cavity Surfaces in the Compressor Blade Rolling Process

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Qichao Jin ◽  
Wenhu Wang ◽  
Ruisong Jiang
Keyword(s):  
Shear Stress ◽  
Contact Pressure ◽  
Rolling Process ◽  
Compressor Blade ◽  
Rolling Contact ◽  
Slip Zone ◽  
Sliding Velocity ◽  
Forward Slip ◽  
Forming Process ◽  
Forward Slip Zone

The investigation of the contact responses is the key for evaluating the local wear of dies in the plastic forming process. This paper investigated the contact load distributions and evolutions of the roller cavities in the compressor blade rolling process by the FEM. It was the first study to quantify the distributions and evolutions of the contact responses for rolling irregular components. The results indicated that the maximum contact pressure is generally present at the center of the contact interfaces, and the magnitudes of contact pressure decreased with evolution of the blade rolling process. The rolling contact interfaces can be divided into the backward slip zone, the stick zone, and the forward slip zone based on the shear stress distributions. The stick zone was a narrow belt which separated the forward and the backward slip zone, and the shear stress in the stick zone was nearly zero. The shear stress magnitudes in the forward slip zone were smaller than those in the backward slip zone, and the directions of shear stress in forward and backward slip zones were adverse. The magnitudes of shear stress over the forward and backward slip zones decreased with evolution of the blade rolling process. The distributions of local sliding were in a V-shape, the local sliding in the stick zone was nearly zero, and the bigger sliding in backward and forward slip zones was present at the boundaries of rolling entrance and exit sections. The local sliding velocity magnitudes in the backward slip zones were always bigger than those in the forward slip zones, and the magnitudes of local sliding at the rolling entrance sections were bigger than those at the rolling exit sections. In general, the local sliding velocity magnitudes increased firstly and decreased sharply at 2T/3. The current paper develops the distributions and evolutions of contact responses in the blade rolling process. The contact responses can be used for studying the wear of roller cavities to avoid the accuracy inconsistency of the shaped blade.

Stressed state of the forward slip zone in the region of deformation of a powder being rolled

1980 ◽  
Vol 19 (11) ◽  
pp. 750-753
Author(s):  
E. B. Lozhechnikov
Keyword(s):  
Stressed State ◽  
Slip Zone ◽  
Forward Slip ◽  
Forward Slip Zone

Simulation of cold rolling and skin rolling of strips in the deformation zone consisting only of a forward slip zone

2012 ◽  
Vol 2012 (11) ◽  
pp. 942-946 ◽  
Author(s):  
E. A. Garber ◽  
D. L. Shalaevskii ◽  
A. I. Traino
Keyword(s):  
Cold Rolling ◽  
Deformation Zone ◽  
Slip Zone ◽  
Forward Slip ◽  
Forward Slip Zone ◽  
Skin Rolling

Research on Behavior of Slab Surface Defects in Forward Slip Zone during V-H Rolling Process

2008 ◽  
Vol 575-578 ◽  
pp. 243-248 ◽  
Author(s):  
Hai Liang Yu ◽  
Xiang Hua Liu ◽  
Chang Sheng Li ◽  
Li Qing Chen
Keyword(s):  
Contact Pressure ◽  
Surface Defects ◽  
Rolling Direction ◽  
Longitudinal Crack ◽  
Crack Tip ◽  
Rolling Process ◽  
Slab Surface ◽  
Forward Slip ◽  
Significant Information ◽  
Forward Slip Zone

Behavior of the transversal crack and the longitudinal crack on slab surface during V-H rolling was simulated by the FEM. The contact pressure on crack surfaces and the crack-tip stress change rules during rolling were analyzed. Results show that the contact pressure on crack surfaces decreases and the tensile stress appears at crack tip in the zone of slippage on the delivery side, which may make the cracks propagation. For the phenomenon, the stress distribution along rolling direction and along width direction in rolling are analyzed, and the influence of forward slip on the closure and growth of the surface transversal crack and the surface longitudinal crack are discussed. Results support some significant information for researching the behavior of the slab surface defects in rolling process.

Forward slip in powder rolling

1976 ◽  
Vol 15 (5) ◽  
pp. 339-342 ◽  
Author(s):  
E. B. Lozhechnikov
Keyword(s):  
Powder Rolling ◽  
Forward Slip

scholarly journals In Situ Shear Test for Revealing the Mechanical Properties of the Gravelly Slip Zone Soil

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6531 ◽  
Author(s):  
Zongxing Zou ◽  
Qi Zhang ◽  
Chengren Xiong ◽  
Huiming Tang ◽  
Lei Fan ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Plastic Deformation ◽  
Shear Test ◽  
Slip Zone ◽  
Three Gorges Reservoir Area ◽  
Silty Clay ◽  
Sigmoid Function ◽  
In Situ Test ◽  
Deformation Stage

Slip zone soil is usually composed of clay or silty clay; in some special geological environments, it contains gravels, which make the properties of the slip zone soil more complex. Unfortunately, in many indoor shear tests, gravels are removed to meet the demands of apparatus size, and the in situ mechanical property of the gravelly slip zone soil is rarely studied. In this study, the shear mechanical property of the gravelly slip zone soil of Huangtupo landslide in the Three Gorges Reservoir area of China was investigated by the in situ shear test. The test results show that the shear deformation process of the gravelly slip zone soil includes an elastic deformation stage, elastic–plastic deformation stage, and plastic deformation stage. Four functions were introduced to express the shear constitutive model of the gravelly slip zone soil, and the asymmetric sigmoid function was demonstrated to be the optimum one to describe the relationship of the shear stress and shear displacement with a correlation coefficient of 0.986. The comparison between the in situ test and indoor direct shear test indicates that gravels increase the strength of the slip zone soil. Therefore, the shear strength parameters of the gravelly slip zone soil obtained by the in situ test are more preferable for evaluating the stability of the landslide and designing the anti-slide structures.

Carbonization of Carbonates and Fractionation of Stable Carbon Isotopes in a Dynamic Slip Zone

2020 ◽  
Vol 58 (9) ◽  
pp. 981-993
Author(s):  
Yu. A. Morozov ◽  
V. S. Sevastianov ◽  
A. Yu. Yurchenko ◽  
O. V. Kuznetsova
Keyword(s):  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Slip Zone ◽  
Stable Carbon ◽  
Dynamic Slip
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