A New Parameter for the Hysteretic Stress-Strain Behavior of Metals

1975 ◽  
Vol 97 (1) ◽  
pp. 33-38 ◽  
Author(s):  
H. R. Jhansale
Keyword(s):  
Steady State ◽  
Cyclic Hardening ◽  
Cyclic Stress ◽  
Stress Strain ◽  
Transient Phenomena ◽  
Strain Behavior ◽  
Structural Metals ◽  
Input Variables ◽  
Transient And Steady State

Analysis of transient and steady state stress-strain hysteresis behavior of several structural metals reveals a new parameter, defined as the “Yield Range Increment”, which uniquely denotes the various transient phenomena including cyclic hardening, softening, relaxation, and creep and the steady state cyclic stress-strain behavior. All transient and steady state hysteresis branches of a given material appear to be identical in shape, after their Yield Range Increments, which are suitable portions of the initial “elastic” parts, are deleted. A mathematical model incorporating the Yield Range Increment is proposed. With the determination of the functional relationship between the newly proposed parameter and the several input variables of cyclic loading, this approach should lead to a unified approach for describing the cyclic stress-strain response of materials.

Cyclic Stress-Strain Behavior of Reinforcing Steel Including Effect of Buckling

1999 ◽  
Vol 125 (6) ◽  
pp. 605-612 ◽  
Author(s):  
Mario E. Rodriguez ◽  
Juan C. Botero ◽  
Jaime Villa
Keyword(s):  
Cyclic Stress ◽  
Reinforcing Steel ◽  
Stress Strain ◽  
Strain Behavior

Cyclic stress–strain behavior and load sharing in duplex stainless steels: Aspects of modeling and experiments

2007 ◽  
Vol 55 (16) ◽  
pp. 5359-5368 ◽  
Author(s):  
R. Lillbacka ◽  
G. Chai ◽  
M. Ekh ◽  
P. Liu ◽  
E. Johnson ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Load Sharing ◽  
Cyclic Stress ◽  
Duplex Stainless Steels ◽  
Stress Strain ◽  
Strain Behavior ◽  
Modeling And Experiments

Low-Cycle Fatigue Evaluation Using the Weld Master S-N Curve

2006 ◽  
Author(s):  
P. Dong ◽  
Z. Cao ◽  
J. K. Hong
Keyword(s):  
Test Data ◽  
Low Cycle Fatigue ◽  
Strain Curve ◽  
Cyclic Stress ◽  
Structural Stress ◽  
Stress Strain ◽  
Strain Behavior ◽  
Scale Test ◽  
Stress Estimation ◽  
Fatigue Evaluation

In the context of fatigue evaluation in the low-cycle regime, the use of the master S-N curve in conjunction with elastic FE-based structural stress calculations is presented. An elastic pseudo structural stress estimation is introduced by assuming that Neuber’s rule applies in relating structural stress and strain concentration at a weld to the material’s cyclic stress-strain behavior. With the pseudo structural stress procedure, recent sources of recent full scale test data on pipe and vessel welds were analyzed as a validation of the proposed procedure. The estimated fatigue lives versus actual test lives show a reasonable agreement. Finally, the feasibility of using monotonic stress-strain curves as a first approximation is also examined for applications when cyclic stress-strain curve may not be readily found. The analysis results indicate that the life estimations using monotonic stress-strain curves are reasonable, with the recent test data falling within mean ± 2σ, where σ represents the standard deviation of the master S-N curve.

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