1,721,146 research outputs found
"Un algoritmo per la contemporanea definizione di discontinuità geometriche e determinazione del fattore di concentrazione delle sollecitazioni da dati termoelastici"
No full text"Location of geometric discontinuities and assessment of stress concentration factor from thermoelastic data only"
No full textDispositivo modulare per la diagnostica strutturale di materiali e strutture varie, mediante tecniche termografiche ad eccitazioni multiple
No full textModular Device for structural analysis of various materials and structures, trough multiple excitations thermographic techniques
No full textData Correction for Thermoelastic Stress Analysis on Titanium Components
No full textThermoelastic Stress Analysis (TSA) is based on the thermoelastic effect, well described by a linear relationship between change in body temperature and state of stress in the presence of local adiabatic conditions. In TSA material properties are usually considered constant and a peak to peak variation of the state of stress provides a linearly correlated peak to peak temperature variation. For titanium and aluminium alloys thermoelastic properties of materials are not constant and, in fact, the second order effect due to mean stress on thermoelastic signal is not negligible any more. If neglected for these kind of materials, this second order effect could lead to an error that can be higher than 20 %. In this work a new procedure of thermal signal processing is investigated to obtain the corrected thermoelastic data through a new approach based on revised thermoelastic theory
Data Processing Procedures for Defects Evaluation in Composite Materials by Means of Stimulated Thermography
No full text
Combined thermoelastic and thermographic data for the evaluation of crack growth in industrial components
No full textCharacterisation of steel welded joints by infrared thermographic methods
No full textDespite the large number of proposals in the field of fatigue prediction of welded joints, there is no worldwide accepted and unified theory which can be easily applicable to any load condition. Real life components, in fact, differ in geometry and/or type of load from the structural design considered by the Standards, hence a lot of precautionary safety factors are used, leading to an underestimation of the actual fatigue life of joints. Infrared thermography has a great potential in this field. In fact, it enables a full-field stress analysis with an adequate spatial resolution so that the complexity of the stress state at the weld toe and its time evolution are taken into account, emphasising anomalies that may predict structural failure. This paper presents a new method for the evaluation of the fatigue limit, focusing on interesting results derived from the analysis of thermoelastic signal phase evolution. Variations in the value of signal phase indicate a non-elastic behaviour and plastic dissipation in the material
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