Stress-Strain Analysis of Cyclic Plastic Bending and Torsion

1978 ◽  
Vol 100 (2) ◽  
pp. 157-163 ◽  
Author(s):  
N. E. Dowling
Keyword(s):  
Cyclic Loading ◽  
Alloy Steel ◽  
Strain Analysis ◽  
Strain Curve ◽  
Cyclic Stress ◽  
Curve Analysis ◽  
Pure Bending ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Plastic Bending

Analysis of stresses, strains, and damping energies is considered for cyclic loading of simple geometries. For beams under pure bending and for circular shafts under torsion, it is shown that cyclic loading may be handled by analysis that differs from that applicable to monotonic loading only by the substitution of a cyclic stress-strain curve. Analysis and experiment are successfully compared for rectangular beams of an alloy steel.

A multiaxial stress-strain analysis for proportional cyclic loading

1993 ◽  
Vol 28 (2) ◽  
pp. 125-133 ◽  
Author(s):  
A Navarro ◽  
M W Brown ◽  
K J Miller
Keyword(s):  
Strain Analysis ◽  
Hysteresis Loops ◽  
Strain Curve ◽  
Cyclic Stress ◽  
Strain Hardening Exponent ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Flow Equations ◽  
Deformation Response ◽  
Tubular Specimens

A simplified treatment is presented for the analysis of tubular specimens subject to in-phase tension-torsion loads in the elasto-plastic regime. Use is made of a hardening function readily obtainable from the uniaxial cyclic stress-strain curve and hysteresis loops. Expressions are given for incremental as well as deformation theories of plasticity. The reversals of loading are modelled by referring the flow equations to the point of reversal and calculating distances from the point of reversal using a yield critertion. The method has been used to predict the deformation response of in-phase tests on an En15R steel, and comparisons with experimental data are provided. The material exhibited a non-Masing type behaviour. A power law rule is developed for predicting multiaxial cyclic response from uniaxial data by incorporating a hysteretic strain hardening exponent.

Analysis for Stress-Strain Curve during Stretching Coarse Yak Hair with Different Pretreating Condition

2012 ◽  
Vol 535-537 ◽  
pp. 1112-1115
Author(s):  
Jian Liu
Keyword(s):  
Strain Curve ◽  
Curve Analysis ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Hair Fiber ◽  
Action Force

The changes, on stress-strain curve of coarse yak hair piece with different pretreating condition, have been analyzed during stretching slenderization in this paper. The result shows that the reagent of pretreatment could break the S-S bond effectively to prepare for stretching, and the pretreatment reagent will damage the structure of yak hair fiber if the pretreating time is more than 10min. From curve analysis, it shows that the stretching speed raising will cause the strengthening point brought forward and the yak hair fiber will bear more action force when stretching, and slow stretching could reduce the damage effectively to the structure of yak hair fiber. In addition, part of fibers would have some slippage or breakage on yak hair pieces when stretching slenderization happen.

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