Vibration analysis of delaminated composite beams and plates using a higher-order finite element

Hu, Ning; Fukunaga, H.; Kameyama, Masaki; Aramaki, Yasuhiro; Chang, Fu Kuo

doi:10.1016/s0020-7403(02)00026-7

Cited by 92 publications

(44 citation statements)

References 20 publications

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“…They modeled the delaminated region by using additional boundary conditions at the delamination fronts. Finite element methods using the higher-order deformation theory were presented by Chattopadhyay et al [13], Radu and Chattopadhyay [14] and Hu et al [15].…”

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confidence: 99%

Vibration of composite beams with two overlapping delaminations

2005

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Delaminations in composite laminates may develop from small cracks due to fabrication and impact loading, or from places of high stress concentration. The locations of the delaminations are not determinate. In this research, an analytical solution for the free vibration of a composite beam with two overlapping delaminations is presented. The delaminated beam is analyzed as seven interconnected beams using the delaminations as their boundaries. The continuity and equilibrium conditions are satisfied between the adjoining regions of the beams. Classical beam theory is applied to each of the beams. Complex vibration behaviors emerge for different sizes and locations of the delaminations. Comparison with analytical results reported in the literature verifies the validity of the present solution.

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confidence: 99%

Vibration of composite beams with two overlapping delaminations

2005

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“…The simulation is performed with the material and the geometrical properties considered in Hu et al [5] and Qiao and Chen [28] considered to be very small (0.0005 • ) by extending the first domain of the rotating taper plate throughout the length of the plate without dropping the plies so that the comparison of the present FEM could be performed with the natural frequencies derived for the uniform delaminated composite plate as presented in Hu et al [5] and Qiao and Chen [28]. The fundamental frequencies of intact and mid-plane width delaminated tapered composite plates evaluated for various delamination length are presented in Table 3.…”

Section: Validation With Available Literaturementioning

confidence: 99%

“…Rao and Gupta [4] investigated the influences of twist, offset, rotating speed, depth variation and breadth ratios on the natural frequencies and bending mode shapes of twisting beams numerically. Hu et al [5] developed a configuration for moderately thick composite laminates by using C 0 -type four-noded finite elements and seven degrees of freedom per node. The continuity conditions at the delamination junction were satisfied using the penalty function method.…”

Section: Introductionmentioning

confidence: 99%

Dynamic instability analysis of rotating delaminated tapered composite plates subjected to periodic in-plane loading

Arumugam

Rajamohan

2016

Arch Appl Mech

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In this study, the dynamic instability analysis of rotating delaminated thickness tapered composite plates with different taper configurations subjected to periodic in-plane loads is performed. The governing differential equations of motion of the various configurations of a rotating thickness mid-plane delaminated tapered laminated composite plate are presented in the finite element formulation based on classical laminated plate theory including various rotational effects. The finite element formulation developed for the dynamic instability analysis of rotating delaminated tapered composite plate is validated by comparing the parametric exciting frequencies evaluated using the present finite element method (FEM) with those presented in available literature and comparing the natural frequencies of rotating delaminated tapered composite plate evaluated using the present FEM with experimentally measured results. Various parametric studies are also performed to study the effect of taper configurations, rotational speed, delamination length, delamination location and in-plane periodic loads on stability of the structure. It was seen that the influences of rotating speed on the principal DIR spectra among taper configurations and uniform plate are significant and the normalized width of principal and second instability regions of parametric resonance frequencies increase in the order of uniform, TC3, TC2 and TC1 for all the rotating speeds.

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“…Some parametric studies on the dynamic behavior of delaminated plates in case of various boundary conditions, different lay-ups and changing geometries were presented. Hu et al (2002) studied the vibration of moderately thick laminated plates containing delaminations using FST finite element method. The effects of delamination on changing the vibration behavior of the geometry were inspected.…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Variable Stiffness Composite Laminated Plates with Delamination Using Spline-FSM

Fazilati

2017

Lat. Am. j. solids struct.

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The dynamic behavior of variable stiffness composite laminated (VSCL) plate with curvilinear fiber orientation subjected to inplane end-loads is investigated. A variable stiffness design can increase the laminated composite structural performance and also provides flexibility for trading-offs between various structural properties. In each ply of the VSCL plate, the fiber-orientation angle assumed to be changed linearly with respect to horizontal geometry coordinate. The spline finite strip method based on both classical as well as higher order shear deformation plate theories is formulated to explain the structural behavior. The panel is assumed containing internal square delamination regions with friction and contact conditions at delaminated interfaces are not considered. In order to demonstrate the capabilities of the developed method in predicting the structural dynamic behavior, some representing results are obtained and compared with those available in the literature. The effects of change in curvilinear fiber orientation angles on the structural stability is studied. The obtained results show very good conformity in comparison with those exists in the available literature.

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Vibration analysis of delaminated composite beams and plates using a higher-order finite element

Cited by 92 publications

References 20 publications

Vibration of composite beams with two overlapping delaminations

Vibration of composite beams with two overlapping delaminations

Dynamic instability analysis of rotating delaminated tapered composite plates subjected to periodic in-plane loading

Stability Analysis of Variable Stiffness Composite Laminated Plates with Delamination Using Spline-FSM

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