Journal of Composites

Research Article

Active Constrained Layer Damping of Smart Skew Laminated Composite Plates Using 1–3 Piezoelectric Composites

Table 1

Comparison of fundamental natural frequencies () of simply supported skew laminated composite plates integrated with the patches of negligible thickness.


Skew angle	Source	Symmetric cross-ply			Antisymmetric cross-ply			Antisymmetric angle-ply
		(90°/0°/90°/0°/90°)			(0°/90°/0°/90°)			(45°/−45°/45°/−45°)
		Modes			Modes			Modes
		1	2	3	1	2	3	1	2	3

0°	Reference [41]	1.5699	2.8917	3.7325	1.4829	2.4656	3.2522	1.7974	3.3351	3.3351
0°	Present FEM	1.5635	2.4383	3.5033	1.5076	2.4380	3.2254	1.8493	3.3359	3.3370
15°	Reference [41]	1.6874	3.0458	3.9600	1.5741	2.5351	3.0270	1.8313	3.2490	3.6724
15°	Present FEM	1.6571	2.9840	3.6505	1.5796	2.5775	2.9892	1.8675	3.2075	3.5810
30°	Reference [41]	2.0840	3.4023	4.6997	1.8871	2.9372	3.4489	2.0270	3.4431	4.2361
30°	Present FEM	1.9596	3.1690	4.6796	1.8226	2.9585	3.2357	1.9894	3.2365	4.3208
45°	Reference [41]	2.8925	4.1906	5.4149	2.5609	3.3126	4.0617	2.5609	3.3131	4.2772
45°	Present FEM	2.4811	4.4875	5.3289	2.2996	3.4773	4.4889	2.3194	3.4870	4.5009

* ; ω is the circular natural frequency.