Experimental investigation on cyclic deformation behaviour of primary heat transport piping materials: Masing analysis of hysteresis loops

2010 ◽  
Vol 63 (2-3) ◽  
pp. 559-563
Author(s):  
S. Sivaprasad ◽  
Surajit Kumar Paul ◽  
N. Narasaiah ◽  
S. Tarafder
Keyword(s):  
Experimental Investigation ◽  
Heat Transport ◽  
Cyclic Deformation ◽  
Deformation Behaviour ◽  
Hysteresis Loops

scholarly journals Axial-torsional fatigue and cyclic deformation of 304L stainless steel at room temperature

2019 ◽  
Vol 300 ◽  
pp. 08004
Author(s):  
Cainã Bemfica ◽  
Edgar Mamiya ◽  
Fábio Castro
Keyword(s):  
Stainless Steel ◽  
Cyclic Deformation ◽  
Room Temperature ◽  
Axial Stress ◽  
Deformation Behaviour ◽  
Hysteresis Loops ◽  
Secondary Hardening ◽  
304L Stainless Steel ◽  
Proportional Loading ◽  
Torsional Fatigue

This work investigates the axial-torsional fatigue and cyclic deformation behaviour of 304L stainless steel at room temperature. Four fully reversed strain-controlled loading paths (axial, torsional, proportional axial-torsional, and 90º out-of-phase axial-torsional) and a fully-reversed shear strain-controlled with static axial stress loading were investigated. For axial, torsional, torsional with static stress and few proportional experiments, an initial cyclic softening was followed by secondary hardening related to martensitic transformation. Secondary hardening was not observed for non-proportional loading nor for some proportional experiments. The influence of the non-stabilized cyclic deformation behaviour on the fatigue life estimates of two multiaxial critical plane fatigue models (Smith–Watson–Topper and Fatemi–Socie) was investigated. Life estimates based on the stress-strain hysteresis loops corresponding to the maximum softening and to the half-life were similar for the two models.

scholarly journals Experimental Investigation of Rate-Dependent Inner Hysteresis Loops in PZT

2005 ◽  
Vol 881 ◽  
Author(s):  
Alexander York ◽  
Stefan Seelecke
Keyword(s):  
Experimental Investigation ◽  
Systematic Study ◽  
Domain Switching ◽  
Piezoelectric Materials ◽  
Relaxation Times ◽  
Hysteresis Loops ◽  
Loading Rates ◽  
Rate Dependent ◽  
Realistic Modeling ◽  
Kinetics Of

AbstractThe rate-dependence of piezoelectric materials resulting from the kinetics of domain switching is an important factor that needs to be included in realistic modeling attempts. This paper provides a systematic study of the rate-dependent hysteresis behavior of a commercially available PZT stack actuator. Experiments covering full as well as minor loops are conducted at different loading rates with polarization and strain recorded. In addition, the creep behavior at different constant levels of the electric field is observed. This provides evidence of kinetics being characterized by strongly varying relaxation times that can be associated with different switching mechanisms.

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