Issue 58

E.S.M.M. Soliman, Frattura ed Integrità Strutturale, 58 (2021) 151-165; DOI: 10.3221/IGF-ESIS.58.11

  K F

(25)

where K is stiffness of beam, F is load and δ is static deflection or zero frequency deflection. In this study, the severity of crack can be expressed as crack damage severity (%) which is estimated using the following equation:

 K K undamaged damaged

  K

 100

(26)

K undamaged

where Δ K is crack damage severity, K undamaged is stiffness of undamaged beam and K damaged is stiffness of damaged beam.

Figure 10: Variation of first bending mode frequency vs. µ and Ψ .

Figure 11: Variation of second bending mode frequency vs. µ and Ψ .

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