Relationship between Heat Generation at Single Edge Penetrating Crack in Strip Specimen and Vibrational Modes of Specimen in Sonic-IR Method

Sonic IR is an emerging NDE technique being developed at the Wayne State University that has potential crack detectability both in metallic and non-metallic materials. The technique has applications in various sectors of NDE including aerospace, automotive, transportation, pressure vessel, and piping and manufacturing. Although it is established that friction caused by rubbing between the faying surfaces (i.e. tightly closed surfaces of closed surface cracks) or other material flaws under sonic load generates heat, the relationship of the quality and quantity of heat generation mechanics are not yet well known. In this paper a simple aluminum plate sample with generated cracks is studied through both experimentation and finite element (FE) modeling and simulation. The dynamics of Sonic IR for a simple metallic sample are analyzed with LS-DYNA3D finite element program. The FE analysis does support the frictional heat generation due to the rubbing of the faying surfaces of the crack faces. FE analysis also allows visualization of crack faces rubbing mode. The experiments show the infrared signal level as the indication of heat generation, captured in real time video frames. In FE simulation the energy plot at the crack interface is an indicator of heat generation and the energy plots are compared with the infrared signal plot. The results of varying test parameters in experiments as well as FE simulations are also discussed.

Download Full-text

Fundamental Study on Vibration of Inspection Object and Heat Generation at Defect in Sonic-IR Test

The Proceedings of Mechanical Engineering Congress Japan ◽

10.1299/jsmemecj.2019.j40130 ◽

2019 ◽

Vol 2019 (0) ◽

pp. J40130

Author(s):

Hirotaka TANABE ◽

Yui IZUMI ◽

Yuki AKIMICHI

Keyword(s):

Heat Generation ◽

Fundamental Study ◽

Sonic Ir

Download Full-text

Heat Generation and Transport in the Earth

10.1017/cbo9780511781773 ◽

2010 ◽

Cited By ~ 31

Author(s):

Claude Jaupart ◽

Jean-Claude Mareschal

Keyword(s):

Heat Generation ◽

The Earth

Download Full-text

Anomalous vibrational modes in acetanilide as studied by inelastic neutron scattering

Journal de Physique I ◽

10.1051/jp1:1992256 ◽

1992 ◽

Vol 2 (10) ◽

pp. 1929-1939 ◽

Cited By ~ 9

Author(s):

Mariette Barthes ◽

Juegen Eckert ◽

Susanna W. Johnson ◽

Jacques Moret ◽

Basil I. Swanson ◽

...

Keyword(s):

Neutron Scattering ◽

Inelastic Neutron Scattering ◽

Inelastic Neutron ◽

Vibrational Modes

Download Full-text

Isotope Shift of Local Vibrational Modes at Transition-Metal Impurities in Semiconductors*

Zeitschrift für Physikalische Chemie ◽

10.1524/zpch.1996.1.1.295 ◽

1996 ◽

Vol 1 (1) ◽

pp. 295-304

Author(s):

C. Schrepel ◽

C. Göbel ◽

U. Scherz ◽

P. Thurian ◽

G. Kaczmarczyk ◽

...

Keyword(s):

Transition Metal ◽

Isotope Shift ◽

Vibrational Modes ◽

Metal Impurities ◽

Impurities In Semiconductors ◽

Transition Metal Impurities ◽

Local Vibrational Modes

Download Full-text

Numerical Study of the Combined Free-Forced Convection and Mass Transfer Flow Past a Vertical Porous Plate in a Porous Medium with Heat Generation and Thermal Diffusion

Nonlinear Analysis Modelling and Control ◽

10.15388/na.2006.11.4.14737 ◽

2006 ◽

Vol 11 (4) ◽

pp. 331-343 ◽

Cited By ~ 19

Author(s):

M. S. Alam ◽

M. M. Rahman ◽

M. A. Samad

Keyword(s):

Mass Transfer ◽

Flow Field ◽

Differential Equations ◽

Forced Convection ◽

Heat Generation ◽

Numerical Study ◽

Porous Plate ◽

Integration Scheme ◽

Suction Parameter ◽

Transfer Flow

The problem of combined free-forced convection and mass transfer flow over a vertical porous flat plate, in presence of heat generation and thermaldiffusion, is studied numerically. The non-linear partial differential equations and their boundary conditions, describing the problem under consideration, are transformed into a system of ordinary differential equations by using usual similarity transformations. This system is solved numerically by applying Nachtsheim-Swigert shooting iteration technique together with Runge-Kutta sixth order integration scheme. The effects of suction parameter, heat generation parameter and Soret number are examined on the flow field of a hydrogen-air mixture as a non-chemical reacting fluid pair. The analysis of the obtained results showed that the flow field is significantly influenced by these parameters.

Download Full-text