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Multiple through-the-width delamination detection for a composite beam using magnetostrictive patch
This paper deals with detection of multiple through-the-width delaminations for a laminated beam using smart magnetostrictive material patch. A dynamic analytical model is developed using the classical beam theory and the assumption of constant peel and shear strains through bond line thickness. A magnetostrictive patch is perfectly bonded on the top surface of a host laminated beam. One of the magnetostrictive patch segments is employed as an actuator to excite the beam system, whereas the rest are employed as sensors to measure the required magnetic flux density passing through each magnetostrictive patch segment. Two typical multiple delamination patterns, namely the original-pattern and the counter-pattern, are considered in this investigation. By monitoring the variation trend of magnetic flux density distributions along beam length, multiple delaminations within a laminated beam system can be clearly identified. It is revealed by the parameter study that the magnetic flux density distribution for the laminated beam having multiple delaminations can be significantly affected by the electric field applied to the magnetostrictive patch, delamination pattern, length, location, gap, and the thickness of delaminated components. A comparison of the first three frequencies between the present analytical and finite element analysis models shows that there is a good agreement between these two models.
Multiple through-the-width delamination detection for a composite beam using magnetostrictive patch
This paper deals with detection of multiple through-the-width delaminations for a laminated beam using smart magnetostrictive material patch. A dynamic analytical model is developed using the classical beam theory and the assumption of constant peel and shear strains through bond line thickness. A magnetostrictive patch is perfectly bonded on the top surface of a host laminated beam. One of the magnetostrictive patch segments is employed as an actuator to excite the beam system, whereas the rest are employed as sensors to measure the required magnetic flux density passing through each magnetostrictive patch segment. Two typical multiple delamination patterns, namely the original-pattern and the counter-pattern, are considered in this investigation. By monitoring the variation trend of magnetic flux density distributions along beam length, multiple delaminations within a laminated beam system can be clearly identified. It is revealed by the parameter study that the magnetic flux density distribution for the laminated beam having multiple delaminations can be significantly affected by the electric field applied to the magnetostrictive patch, delamination pattern, length, location, gap, and the thickness of delaminated components. A comparison of the first three frequencies between the present analytical and finite element analysis models shows that there is a good agreement between these two models.
Multiple through-the-width delamination detection for a composite beam using magnetostrictive patch
Tan, Ping (author) / Tong, Liyong (author)
2006
20 Seiten, 32 Quellen
Conference paper
English
Aktor , Feldeffekt , Finite-Elemente-Methode , intelligenter Werkstoff , magnetischer Fluss , magnetisches Messverfahren , magnetostriktives Bauelement , Messen mechanischer Größen , Monitoring , Scherbeanspruchung , Schichtablösung , Schichtwerkstoff , Träger (Bauwesen) , Verbundkonstruktion , Wirkung elektrischer Felder
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