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UID:0-279@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20201223T163000

DTEND;TZID=Asia/Jerusalem:20201223T173000

DTSTAMP:20230525T070725Z

URL:https://aerospace.technion.ac.il/events/quantitative-correlation-betwe
 en-strains-measurement-and-damage-severity-in-a-structure-with-local-openi
 ng/

SUMMARY:Quantitative correlation between strains measurement and damage sev
 erity in a structure with local opening
DESCRIPTION:Lecturer:Itay Farajun\n Faculty:Department of Aerospace Enginee
 ring\n Institute:Technion – Israel Institute of Technology\n Location:ht
 tps://technion.zoom.us/j/8626539141\n Zoom: \n Abstract: \n Details: \n Wh
 ile SHM science and engineering have matured in recent decades\, by now in
 deed a coherent and well-established branch of structural mechanics\, most
  practicalities are of qualitative nature. The present work suggests a sim
 ple\, user friendly\, method for assessing both damage location and level 
 of damage deterioration along service life.\nSetting is within framework o
 f plane stress isotropic elasticity\, focusing on a representative configu
 ration of a large plate that contains a hole type damage at a distance fro
 m the boundaries\, with a-priori unknown location. Health monitoring is ba
 sed on inducing a remote uniform tension field and measuring strains at se
 lected points. The underlying assumption is that\, according to Saint-Vena
 nt principle\, at sufficient distance from the hole the field characterist
 ics are reasonably approximated by the classical Kirsch solution.\nStartin
 g with the simple case of circular hole we show how just a few strain meas
 urements can expose the location of the hole\, its radius and possible det
 erioration (increasing hole diameter). Next\, using Inglis and finite elem
 ent solutions\, we turn to more complicated shapes\, like elliptic and squ
 are holes\, and show how the monitoring procedure provides damage location
  and size of the “equivalent circular hole”. That notion will be exami
 ned in some detail\, including sensitivities\, reliability\, and limits of
  validity. Field strains induced by remote tension have been taken from FE
  computational analysis or from available analytical solutions.\nWe shall 
 argue that the predictive power of the suggested method\, even though of a
 pproximate nature\, provides a practical and simple tool of SHM. Possible 
 extension to anisotropic composite material and other types of structural 
 damage plates will be briefly discussed.\nZoom Meeting
CATEGORIES:Seminars
LOCATION:https://technion.zoom.us/j/8626539141

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