Heat dissipation measurements in low stress cyclic loading of metallic materials: From internal friction to micro-plasticity

2009 ◽  
Vol 41 (8) ◽  
pp. 928-942 ◽  
Author(s):  
F. Maquin ◽  
F. Pierron
Keyword(s):  
Cyclic Loading ◽  
Internal Friction ◽  
Heat Dissipation ◽  
Metallic Materials

Nondestructive Evaluation of Fatigue in Titanium Alloys

1999 ◽  
Vol 591 ◽  
Author(s):  
H. Rösner ◽  
N. Meyendorf ◽  
S. Sathish ◽  
T.E. Matikas
Keyword(s):  
Cyclic Loading ◽  
Dislocation Density ◽  
Surface Temperature ◽  
Nondestructive Evaluation ◽  
Titanium Alloys ◽  
Fatigue Damage ◽  
Damage Accumulation ◽  
Heat Dissipation ◽  
Stacking Faults ◽  
Continuous Change

ABSTRACTDissipated heat has been measured by thermographic technique during fatigue experiments on Ti-6AI-4V. Surface temperature of the specimen was found sensitive to the amount of fatigue damage accumulated in the material. An increased heat dissipation due to fatigue can be related to continuous change in the microstructure (increased dislocation density, stacking faults etc.) of the material. A method based on passive thermography can be proposed to monitor damage accumulation in Ti-6Al-4V due to cyclic loading.

Influence of the free surface and the mean stress on the heat dissipation in steels under cyclic loading

2009 ◽  
Vol 31 (8-9) ◽  
pp. 1407-1412 ◽  
Author(s):  
Charles Mareau ◽  
Véronique Favier ◽  
Bastien Weber ◽  
André Galtier
Keyword(s):  
Free Surface ◽  
Cyclic Loading ◽  
Heat Dissipation ◽  
Mean Stress ◽  
The Mean

Measurement of uniform and localized heat dissipation induced by cyclic loading

1998 ◽  
Vol 38 (4) ◽  
pp. 289-294 ◽  
Author(s):  
T. K. Jacobsen ◽  
B. F. Sørensen ◽  
P. Brøndsted
Keyword(s):  
Cyclic Loading ◽  
Heat Dissipation

scholarly journals Preisach Elasto-Plastic Model for Mild Steel Hysteretic Behavior-Experimental and Theoretical Considerations

Sensors ◽  
2021 ◽  
Vol 21 (10) ◽  
pp. 3546
Author(s):  
Dragoslav Sumarac ◽  
Petar Knezevic ◽  
Cemal Dolicanin ◽  
Maosen Cao
Keyword(s):  
Cyclic Loading ◽  
Mild Steel ◽  
Heat Dissipation ◽  
Split Ring Resonator ◽  
Theoretical Background ◽  
Hysteretic Behavior ◽  
Preisach Model ◽  
Predicting Behavior ◽  
Theoretical Considerations ◽  
Theoretical Results

The Preisach model already successfully implemented for axial and bending cyclic loading is applied for modeling of the plateau problem for mild steel. It is shown that after the first cycle plateau disappears an extension of the existing Preisach model is needed. Heat dissipation and locked-in energy is calculated due to plastic deformation using the Preisach model. Theoretical results are verified by experiments performed on mild steel S275. The comparison of theoretical and experimental results is evident, showing the capability of the Presicah model in predicting behavior of structures under cyclic loading in the elastoplastic region. The purpose of this paper is to establish a theoretical background for embedded sensors like regenerated fiber Bragg gratings (RFBG) for measurement of strains and temperature in real structures. In addition, the present paper brings a theoretical base for application of nested split-ring resonator (NSRR) probes in measurements of plastic strain in real structures.

Internal Friction in Metallic Materials

2007 ◽  
Author(s):  
Mikhail S. Blanter ◽  
Igor S. Golovin ◽  
Hartmut Neuhäuser ◽  
Hans-Rainer Sinning
Keyword(s):  
Internal Friction ◽  
Metallic Materials

High Damping in Ferroelectric and Ferrimagnetic Ceramics

2006 ◽  
Vol 319 ◽  
pp. 157-166 ◽  
Author(s):  
Gilbert Fantozzi ◽  
E.M. Bourim ◽  
Sh. Kazemi
Keyword(s):  
Internal Friction ◽  
Curie Temperature ◽  
Domain Walls ◽  
Relaxation Mechanism ◽  
Ferroelectric Ceramics ◽  
Metallic Materials ◽  
Magnetic Domains ◽  
Damping Materials ◽  
High Level ◽  
Curie Temperature Tc

High damping materials exhibiting a loss factor higher than 10-2 are generally considered as polymer or metallic materials. But, it will be interesting to consider ferroelectric or ferrimagnetic ceramics, in which internal friction can be due to the motion of ferroelectric or magnetic domains. High level of internal friction can be obtained in these ceramics in a given temperature range. In the case of ferroelectric ceramics, hard ferroelectrics, such as BaTiO3 or PZT, can show some relaxation peaks below the Curie temperature due the motion of domain walls and the interaction between the domain walls and the oxygen vacancies or cationic vacancies. In the case of ferrimagnetic ceramics, some anelastic manifestations due to the ferrimagnetic domain walls appear below the Curie Temperature TC. These peaks are linked to the interaction of domain walls with cation vacancies or cation interstitials or the lattice. Above the Curie temperature, a relaxation mechanism due to the exchange of cations Mn3+ and their vacancies on octahedral sites should occur.

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