Study of the strain anisotropy of metals during nonmonotonic plastic deformation in a linear stress state

1990 ◽  
Vol 22 (12) ◽  
pp. 1780-1783 ◽  
Author(s):  
D. V. Khvan ◽  
O. A. Rozenberg ◽  
Yu. A. Tsekhanov
Keyword(s):  
Plastic Deformation ◽  
Stress State ◽  
Strain Anisotropy

An Elastic-Plastic Solver of the Wheel-Rail Contact

2010 ◽  
Author(s):  
Constantin I. Ba˘rbiˆnt¸a˘ ◽  
Sulleyman Yaldiz ◽  
Alina Dragomir ◽  
Spiridon S. Cret¸u
Keyword(s):  
Plastic Deformation ◽  
Stress State ◽  
Plastic Material ◽  
Computer Code ◽  
Load Level ◽  
Analysis Model ◽  
Elastic Plastic ◽  
Circular Arcs ◽  
Plastic Analysis ◽  
Perfect Plastic

Wheel and rail in service undergo continual wear and plastic deformation at the surface, so that in time all wheel profiles will be different. The optimization by grinding a worn rail profile to minimize contact stresses requires the development of a software to reconstruct a rail profile using circular arcs. A working algorithm, able to be incorporated into a computer code, has been developed to solve the stress state in the general case of non-Hertzian contacts. To limit the pressure, an elastic-perfect plastic material has been incorporated into the computer code. The pressure distribution and the corresponding stresses states have been investigated for pure normal loadings, as well as for the combined, normal and tangential loadings. The elastic-plastic analysis model allows fast investigations regarding the influence of different parameters such as load level, contact geometry including the geometry of the worn profiles.

Stress state of metal in multistage plastic deformation

2015 ◽  
Vol 35 (1) ◽  
pp. 1-2
Author(s):  
S. V. Parshin ◽  
V. S. Parshin
Keyword(s):  
Plastic Deformation ◽  
Stress State

The Influence of Different Stress States on 16MnR Deformation Capacity

2013 ◽  
Vol 716 ◽  
pp. 590-594
Author(s):  
Shi Lei Zhao ◽  
Yi Liang Zhang ◽  
Gong Feng Jiang
Keyword(s):  
Plastic Deformation ◽  
Stress State ◽  
Equivalent Stress ◽  
Great Influence ◽  
Equivalent Strain ◽  
Complex Stress State ◽  
Biaxial Stress ◽  
Deformation Capacity ◽  
Engineering Structures ◽  
Stress States

16MnR is the typical material of pressure equipment which worked under complex stress state in engineering application. In order to be close to the actual combined tension-shearing stress state and explore the relationship of deformation capacity and different stress state, many groups of combined tension-torsion tests on 16MnR specimens were designed and the equivalent stress-strain relation under different stress state was obtained. The concept of stress triaxiaty (TS value) was cited to characterize the different stress state and the result showed different stress states have a great influence on the material plastic deformation capacity, TS value turns larger, the plastic deformation weakened; 16MnR has a strongest plastic deformation capacity in pure torsion; the level of tensile stress had no significant effect on the maximum stress in the biaxial stress state, but has a significant inverse relationship with the maximum equivalent strain .At last, the mathematical relationship between maximum equivalent-strain and stress triaxiaty could be found. If the stress state of one point in the engineering structures is certain, the maximum equivalent-strain can be estimated.

scholarly journals CUTTING FORCE DECREASE AT LEADING METAL PLASTIC DEFORMATION

2018 ◽  
Vol 2018 (7) ◽  
pp. 13-18
Author(s):  
Сергей Амбросимов ◽  
Sergey Ambrosimov
Keyword(s):  
Plastic Deformation ◽  
Stress State ◽  
Cutting Force ◽  
Cutting Process ◽  
Power Balance ◽  
View Point ◽  
Force Effect ◽  
Process Study ◽  
History Of ◽  
Material Ductility

The paper reports the analysis of models for the investigation of a cutting force effect decrease at work-able hardened material cutting from the view point of the theory of dislocation and power balance. There is shown a promising model of cutting process study with a leading deformation allowing the computation of cutting force decrease at a leading plastic deformation which is based on the theory of destruction and step-wise takes into account material ductility resource dep-letion. There is presented a description of the model of cutting with a leading plastic deformation and cutting area elastic-plastic stretching for the process of deform-ing-cutting drawing. The model takes into account the history of failure accumulation and changes of stress state indices at each stage of combined working.

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