Ultrasonic evaluation of residual stresses in flat glass tempering: Comparing experimental investigation and numerical modeling

2006 ◽  
Vol 119 (6) ◽  
pp. 3773-3781 ◽  
Author(s):  
Marc Duquennoy ◽  
Dany Devos ◽  
Mohammadi Ouaftouh ◽  
Dominique Lochegnies ◽  
Eric Roméro
Keyword(s):  
Experimental Investigation ◽  
Numerical Modeling ◽  
Residual Stresses ◽  
Flat Glass ◽  
Ultrasonic Evaluation

Ultrasonic evaluation of residual stresses in flat glass tempering by an original double interferometric detection

Ultrasonics ◽  
2006 ◽  
Vol 44 ◽  
pp. e923-e927 ◽  
Author(s):  
D. Devos ◽  
M. Duquennoy ◽  
E. Roméro ◽  
F. Jenot ◽  
D. Lochegnies ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Flat Glass ◽  
Ultrasonic Evaluation ◽  
Interferometric Detection

Ultrasonic Evaluation of Compressive Residual Stress of Surface Treated Metals

2005 ◽  
Vol 490-491 ◽  
pp. 184-189 ◽  
Author(s):  
Farid Belahcene ◽  
Xiaolai Zhou ◽  
Jian Lu
Keyword(s):  
Experimental Data ◽  
Residual Stresses ◽  
Nondestructive Evaluation ◽  
Subsurface Layer ◽  
Surface Mechanical Attrition Treatment ◽  
Shallow Subsurface ◽  
Ultrasonic Evaluation ◽  
Mechanical Attrition ◽  
Machine Parts ◽  
Compressive Residual Stresses

Shot peening is an effective method of improving fatigue performance of machine parts in the industry by producing a thin surface layer of compressive residual stresses that prevents crack initiation and retards crack growth during service. Nondestructive evaluation of the prevailing compressive residual stresses in the shallow subsurface layer is realized by the critically refracted longitudinal (Lcr) waves. This paper presents experimental data obtained on SMAT (surface mechanical attrition treatment) steel alloy S355 sample. Comparative travel-time shows that there are statistically significant differences in treated and untreated specimen. With knowledge of the acoustoelastic constants which are obtained by a test calibration, the experimental data indicates that compressive residual stresses are distributed near subsurface (hundreds of micron). These stress results show that the Lcr technique is efficient for evaluation of residual stresses after the surface treatment.

Repeated underwater explosive forming: Experimental investigation and numerical modeling based on coupled Eulerian–Lagrangian approach

2022 ◽  
Vol 172 ◽  
pp. 108860
Author(s):  
S. Nasiri ◽  
M. Sadegh-Yazdi ◽  
S.M. Mousavi ◽  
M. Ziya-Shamami ◽  
T.M. Mostofi
Keyword(s):  
Experimental Investigation ◽  
Numerical Modeling ◽  
Lagrangian Approach ◽  
Explosive Forming

Numerical and Experimental Investigations on the Residual Stresses at the Centre of Flat Glass Disks After Thermal Tempering

2008 ◽  
Vol 39-40 ◽  
pp. 553-558 ◽  
Author(s):  
Frédéric Soulié ◽  
Norbert Siedow ◽  
John Anton ◽  
Dominique Lochegnies
Keyword(s):  
Residual Stresses ◽  
Scattered Light ◽  
Flat Glass ◽  
Experimental Investigations ◽  
Stress Profile ◽  
Air Cooling ◽  
Conductive Heat ◽  
Air Jets ◽  
Complete Procedure ◽  
Disk Centre

Flat glass disks are thermally tempered by air-cooling with two air jets at the centre of their surfaces. Numerical modelling and photoelasticity measurements are proposed to analyze the distribution of the residual stresses through the glass thickness at the centre of the tempered disks. For the modelling, glass properties dependent of the temperature are used for the conductive heat transfer. Radiation is modelled by an improved approximation method. By taking both structural and stress relaxations into account, the transient and residual stresses are computed along the disk thickness. For experimentation, a complete procedure is proposed to access to the stress state in the centre of the disks using a scattered light polariscope. The average distribution of the residual stresses is deduced from stress profile measurements taking four radial orientations at the disk centre into consideration. Comparison between numerical and experimental values is finally discussed for the residual surface and half-thickness stresses at the disk centre.

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