Analysis of Hysteresis Loop on the Basis of Variable-Amplitude Loading

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.250.94 ◽

2016 ◽

Vol 250 ◽

pp. 94-99

Author(s):

Bogdan Ligaj

Keyword(s):

Plastic Strain ◽

Hysteresis Loop ◽

Strain Energy ◽

Energy Parameter ◽

Stress Strain ◽

Variable Amplitude Loading ◽

Loading Cycle ◽

Variable Amplitude ◽

Plastic Strain Energy

The aim of this paper is to present a method to be used for analysis of stress-strain loops under variable amplitude loading. The method for determination of plastic strain energy parameter ΔWpl consists in determination of envelopes around stress-strain branches (increasing and decreasing) formed in effect of application of a loading program. The method involves development of envelopes to determine energy parameter from the highest (for the highest loading cycle) to the lowest (for the lowest cycle). The paper includes results of stress-strain loop for steel C45.

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Effect of Stress Ratio on the Cumulative Value of Energy Dissipation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.598.125 ◽

2014 ◽

Vol 598 ◽

pp. 125-132 ◽

Cited By ~ 6

Author(s):

Bogdan Ligaj

Keyword(s):

Energy Dissipation ◽

Plastic Strain ◽

Strain Energy ◽

Stress Ratio ◽

Constant Amplitude ◽

Stress Strain ◽

Similar Nature ◽

Plastic Strain Energy ◽

Cumulative Plastic Strain ◽

The Relationship

Aim of this work is to analyze the stress-strain loops recorded during the study c45 steel under programmable stress for constant amplitude loads of the stress ratio: R = -2.0, R = -1.0 and R = -0.5. The results presented in the paper of cumulative plastic strain energy show that the nature of the relationship ΣΔWpl-N for loads of different values of stress ratio R is similar. Course of changes of relationship ΣΔWpl-N for loads with R = -0.5 and R = -2.0 shows a similar nature and range of changes in the value ΣΔWpl, despite significantly different parameters of load.

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Influence of Temperature on the Cyclic Properties of Martensitic Cast Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.726.150 ◽

2012 ◽

Vol 726 ◽

pp. 150-155 ◽

Cited By ~ 6

Author(s):

Stanislaw Mrozinski ◽

Radoslaw Skocki

Keyword(s):

Plastic Strain ◽

Hysteresis Loop ◽

Strain Amplitude ◽

Strain Energy ◽

Stress Amplitude ◽

Cast Steel ◽

Plastic Strain Amplitude ◽

Influence Of Temperature ◽

Influence Of Temperature On ◽

Plastic Strain Energy

This paper attempts to describe changes of the cyclic properties of martensitic cast steel in the function of the number of loading cycles under temperature of 25 and 600oC was made. The cyclic properties were described by means of three hysteresis loop parameters: stress amplitude, plastic strain amplitude, plastic strain energy. It was stated martensitic cast steel always undergoes clear softening which is independent of the temperature and level of total strain.

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