Elastic-plastic strain concentrations produced by various skew holes in a flat plate under uniaxial tension

1971 ◽  
Vol 11 (3) ◽  
pp. 133-141 ◽  
Author(s):  
Charles A. Rau
Keyword(s):  
Plastic Strain ◽  
Flat Plate ◽  
Uniaxial Tension ◽  
Elastic Plastic

Elastic-Plastic Deformation of a Single Grooved Flat Plate Under Longitudinal Shear

1963 ◽  
Vol 85 (4) ◽  
pp. 585-591 ◽  
Author(s):  
Michael F. Koskinen
Keyword(s):  
Plastic Deformation ◽  
Plastic Strain ◽  
Plastic Zone ◽  
Flat Plate ◽  
High Stress ◽  
Longitudinal Shear ◽  
Elastic Plastic ◽  
Semiempirical Equation ◽  
Stress Levels ◽  
Plastic Case

The development of plastic strain is followed from the elastic through the partially plastic to the fully plastic condition for a nonstrainhardening material. Adjacent to the zone of deformation in the fully plastic case is a region of limited plastic deformation. The growth of the plastic zone is compared with predictions based on the elastic-plastic solution for a semi-infinite solid and the elastic solution for a plate. Agreement is good at low stress levels. At high stress levels, a relatively simple semiempirical equation is proposed. Predictions based on elasticity theory alone are shown to be seriously in error.

Bifurcation in compressible elastic/plastic cylinders under uniaxial tension

1985 ◽  
Vol 42 (1) ◽  
pp. 33-54 ◽  
Author(s):  
J. P. Miles ◽  
U. A. Nuwayhid
Keyword(s):  
Uniaxial Tension ◽  
Elastic Plastic

Elastic-Plastic Microcontact Analysis of a Sphere and a Flat Plate

2007 ◽  
Vol 23 (4) ◽  
pp. 341-352 ◽  
Author(s):  
J. L. Liou ◽  
J. F. Lin
Keyword(s):  
Surface Roughness ◽  
Flat Plate ◽  
Contact Pressure ◽  
Contact Area ◽  
Normal Load ◽  
Contact Load ◽  
Asperity Contact ◽  
Elastic Plastic ◽  
Deformation Regime ◽  
Maximum Contact

ABSTRACTThe elastic-plastic microcontact model of a sphere in contact with a flat plate is developed in the present study to investigate the effect of surface roughness on the total contact area and contact load. From the study done by the finite element method, the dimensionless asperity contact area, average contact pressure, and contact load in the elastoplastic regime are assumed to be a power form as a function of dimensionless interference (δ/δec). The coefficients and exponents of the power form expressions can be determined by the boundary conditions set at the two ends of the elastoplastic deformation regime. The contact pressures evaluated by the present model are compared with those predicted by the Hertz theory, without considering the surface roughness and the reported model, including the roughness effect, but only manipulating in the elastic regime. The area of non-zero contact pressure is enlarged if the surface roughness is considered in the microcontact behavior. The maximum contact pressure is lowered by the presence of surface roughness if the contact load is fixed. Under a normal load, both the contact pressure and the contact area are elevated by raising the plasticity index for the surface of the same surface roughness.

The Elastic-Plastic Analysis of Tubes—IV: Thermal Ratchetting

1992 ◽  
Vol 114 (2) ◽  
pp. 236-245 ◽  
Author(s):  
W. Jiang
Keyword(s):  
Steady State ◽  
Plastic Strain ◽  
Centrifugal Force ◽  
Kinematic Hardening ◽  
Elastic Plastic ◽  
External Pressures ◽  
Plastic Analysis ◽  
Steady Solutions ◽  
Number Of Cycles

This paper continues the investigation of the shakedown behavior of tubes subjected to cyclic centrifugal force and temperature, and sustained internal and external pressures. It is found that when ratchetting occurs, the plastic strain builds up with each cycle, but finally reaches a steady state after a large number of cycles for kinematic hardening materials. The steady solutions for three kinds of ratchetting behavior are found and given in this paper.

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