A Case Study: Results and discussion

Figure 28.4 (a) Mechanical impedance for damage in element 1 of ply 3

Figure 28.4 (b) Mechanical impedance for damage in element 2 of ply 3

Figure 28.5 (a) Mechanical impedance for damage in element 1 of ply 4

Figure 28.5 (b) Mechanical impedance for damage in element 2 of ply 4

Further, delamination leads to shift in peak to a lower frequency value and presence of additional local peaks, especially in low frequency range. Thus, mechanical impedance responses may be effectively utilized in qualitative prediction of damages in composite laminate.