Dynamics of a laminated composite beam with delamination and inclusions

Manoach, Emil; Warmiński, Jerzy; Mitura, Andrzej; Samborski, Sylwester

doi:10.1140/epjst/e2013-01952-6

Cited by 9 publications

(11 citation statements)

References 12 publications

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“…Taking into account the frequencies of free vibrations collected in Tab.1 the excitation frequency for the cantilever beam was chosen to be 2 Hz at the sampling frequency of 0.02 s. Such an approach was proposed by Manoach et al [25,26,27]. The load (pressure) was uniformly distributed along the beam.…”

Section: Cantilever Beammentioning

confidence: 99%

“…The vibration-based methods have been widely used in the plates and beams dynamics. For example, Manoach et al [25,26,27,24,48] analysed the frequencies and modes of free vibrations in order to identify damage in beam and plates. The most interesting aspect of these papers was introduction of the so-called Damage Index exploiting the information given by the Poincaré maps [19].…”

Section: Introductionmentioning

confidence: 99%

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A numerical-experimental study on damaged beams dynamics

Samborski

Wieczorkiewicz

Rusinek

2015

EiN

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Article citation info: IntroductionIn many contemporary structures various types of defects can appear leading to significant reduction of the element rigidity and changing its overall mechanical behaviour. A special challenge is detection and localization of hidden defects, which can have many forms depending on the scale of the problem, eg. dislocations, voids or inclusions in microscale [43,49,44,3] to macroscopic defects, such as delamination in laminated composites [31] or welds in metallic materials [53,50]. The current work is focused on testing the applicability of dynamic vibration-based, as well as the space analysis methods to defect detection and localization in 1D (beam) structures. The vibration-based methods have been widely used in the plates and beams dynamics. For example, Manoach et al. [25,26,27,24,48] analysed the frequencies and modes of free vibrations in order to identify damage in beam and plates. The most interesting aspect of these papers was introduction of the so-called Damage Index exploiting the information given by the Poincaré maps [19]. The authors of the current study aimed at testing other dynamical methods towards detection and localization of defects in structures, which led them to reach for time series analysis.Experimental time series, especially nonlinear, can be analyzed by means of the method of delay coordinates, which allows to reconstruct a phase space and Poincaré section. This procedure is precisely described in [2,32] and can be applied for analysis of experimental signals obtained from different kinds of real processes [12,5] and numerical simulations [40]. For instance, the delay coordinate technique is used for researching dynamics of robot joints [47] and to analyse nonlinear system with dry friction [40]. Interesting contribution in the field of phase space reconstruction is presented in [7,8,36] in which the method of delay coordinates is employed for experimental and numerically generated signals, also with noise. Another example can be an impact and a self-excited oscillator with CoulombAmontons friction [13].On the basis of delay coordinates method, a recurrence plot technique is introduced to analyse linear or non-linear stationary and also non-stationary time series [30]. The formal concept of recurrences was introduced by Henri Poincaré in his seminal work from 1890 [37], for which he won a prize sponsored by King Oscar II of Sweden and Norway [30]. Therein, Poincaré did not only discover the homoclinic tangl which lies at the root of the chaotic behaviour of orbits, but he also introduced (as a by-product) the concept of recurrences in conservative systems. Even though much mathematical work was carried out in the following years, Poincaré's pioneering work and his discovery of recurrence had to wait for more than 70 years for the development of fast and efficient computers to be exploited numerically. The use of powerful computers boosted chaos theory and allowed to study new and exciting systems. Some of the tedious computations needed to use the c...

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Section: Cantilever Beammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A numerical-experimental study on damaged beams dynamics

Samborski

Wieczorkiewicz

Rusinek

2015

EiN

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“…Note that the contemporary AE equipment also enables damage identification thanks to the advanced software tools for signal analysis such as the Fast Fourier Transform (FFT) [ 10 ]. Damage in the FRP composite structures can also be identified with other vibrational techniques that work well both in the experiment and in the FEM modeling [ 19 , 20 , 21 , 22 ]; they allow for friction or thermal effects and give an insight into the interlaminar forces/stress state in the dynamic regime, which is inevitable even in outwardly static problems (in a global sense), as the propagation of delamination can be piecewise rapid or even unstable. On the other hand, the abovementioned complicated studies omit the detailed modeling of the internal structure (resin, fibers, voids, etc.)…”

Section: Introductionmentioning

confidence: 99%

Stability and Load-Carrying Capacity of Thin-Walled FRP Composite Z-Profiles under Eccentric Compression

et al. 2020

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This study investigates the effect of eccentric compressive load on the stability, critical states and load-carrying capacity of thin-walled composite Z-profiles. Short thin-walled columns made of carbon fiber-reinforced plastic composite material fabricated by the autoclave technique are examined. In experimental tests, the thin-walled structures were compressed until a loss of their load-carrying capacity was obtained. The test parameters were measured to describe the structure’s behavior, including the phenomenon of composite material failure. The post-critical load-displacement equilibrium paths and the acoustic emission signal enabling analysis of the composite material condition during the loading process were measured. The scope of the study also included performing numerical simulations by finite element method to solve the problem of non-linear stability and to describe the phenomenon of composite material damage based on the progressive failure model. The obtained numerical results showed a good agreement with the experimental characteristics of real structures. The numerical results are compared with the experimental findings to validate the developed numerical model.

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“…In Manoach et al. 13 an experimental study of the dynamic behavior of beams with delamination was performed. In order to model the delamination in layered composite beams small inclusions of different materials were inserted, modeling the delamination.…”

Section: Introductionmentioning

confidence: 99%

Large amplitude vibrations of heated Timoshenko beams with delamination

Manoach

Warmiński

Warmińska

2015

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this work, the large amplitude vibration of a heated Timoshenko composite beam having delamination is studied. The model of delamination considers the contact interaction between sublaminates including normal forces, shear forces, and additional damping due to the interaction of sublaminates. This work is an extension of the previous analysis based on a model of the dynamic behavior of a beam with delamination considering additionally the nonlinearities due to large displacements and temperature changes. Numerical calculations are performed in order to estimate the influence of the delamination, the geometrically nonlinear terms, and elevated temperature on the response of the beam.

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Dynamics of a laminated composite beam with delamination and inclusions

Cited by 9 publications

References 12 publications

A numerical-experimental study on damaged beams dynamics

A numerical-experimental study on damaged beams dynamics

Stability and Load-Carrying Capacity of Thin-Walled FRP Composite Z-Profiles under Eccentric Compression

Large amplitude vibrations of heated Timoshenko beams with delamination

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