Experimental and finite element analysis of higher order behaviour of sandwich beams using digital projection moiré

Pourvais, Yousef; Asgari, Pegah; Moradi, Ali‐Reza; Rahmani, O.

doi:10.1016/j.polymertesting.2014.06.001

Cited by 9 publications

(9 citation statements)

References 34 publications

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“…The different deformation modes were observed under indentation loading for 6 composite sandwich panels exposed to 250 ℃ and 280 ℃ . Fig.…”

Section: Failure Mechanismmentioning

confidence: 99%

“…Fiber reinforced polymer composite sandwich panel (FRPCSP) with lattice truss cores are increasingly used in aerospace and shipping industry, which have been designed and fabricated during the last decade [1][2][3][4][5][6]. Their mechanical behaviors have been tested and analyzed at room temperature, and the superior mechanical properties have been revealed [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Localized damage response of carbon fiber reinforced polymer composite sandwich panel after thermal exposure

et al. 2016

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An experimental study was conducted to investigate the effect of thermal exposure on indentation behaviors of carbon fiber reinforced polymer composite sandwich panel (CFRPCSP) with pyramidal truss cores. Composite sandwich panelswere fabricated by the hot press molding method. Subsequently, composite sandwich panels were exposed to different temperatures for 6 h. After thermal exposure, quasi-static indentation tests were carried out at room temperature. Then, the effect of thermal exposure on the failure mechanism, indentation load and energy absorption were analyzed and discussed. The results showed that the indentation load and energy absorption decreased as exposure temperature increased, which was caused by the degradation of the matrix properties and fiber-matrix interface properties at high temperature. In addition to the decreasing of the indentation load and energy absorption, the failure modes also changed with exposure temperature. It is expected that this study can provide useful information for the design and application of composite sandwich panel with pyramidal truss cores at high temperature.

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“…The different deformation modes were observed under indentation loading for 6 composite sandwich panels exposed to 250 ℃ and 280 ℃ . Fig.…”

Section: Failure Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Localized damage response of carbon fiber reinforced polymer composite sandwich panel after thermal exposure

et al. 2016

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“…Although the ability of building new products from the combination of different layers seems to be unlimited, sandwich structures have always been considered as challenging materials, and the challenge is two-fold: on the one hand, to make such materials easy to produce at the industrial scale without sacrificing performances and taking into account possible problems due to the manufacturing technology [11,12] and, on the other hand, to be able to design, characterize and quality-check them by using new approaches [13] able to give a good description of the behavior also under non-standard conditions (see for instance [14]). For this reason, this enormous potential is rarely fully exploited in civilian sectors mainly due to the cost of design, prototype-making and testing activities, thus sticking to off-the-shelf options that do not completely fulfil the application requirements.…”

Section: Introductionmentioning

confidence: 99%

Application of the Wave Propagation Approach to Sandwich Structures: Vibro-Acoustic Properties of Aluminum Honeycomb Materials

et al. 2018

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Featured Application: Acoustic design and characterization of sandwich panels.Abstract: Sandwich structures are manufactured using multiple combinations of materials for core and laminates. The real performances are influenced by variability in the composing layers and even by the uncertainties introduced while bonding them together. Therefore, experimental tests are usually the preferred way to assess the most important parameters required to develop and to characterize the product, the main downsides lying in their cost and time consumption. This work explores a practical application of the wave propagation approach by means of a case study, in which some significant properties of an aluminum honeycomb panel are obtained starting from simple vibro-acoustic tests carried out on beam specimens. After determining the frequency-dependent bending stiffness function, the sound transmission loss is predicted and compared with the experimental results obtained in sound transmission suites. The same vibro-acoustic tests are used to estimate the core shear modulus. Finally, a parametric study is proposed to show how this technique can be effectively used in the early design stage, when producing physical samples is often impossible due to time and money constraints. The method proved to be a reliable and powerful tool in all the tested applications, providing good results with limited computational effort.

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“…Considering to the works [10][11][12] projection moiré is a simple method to obtain the eigenmodes that would allow to predict the possible non-qualitative graphical images that could occur during printing process.…”

Section: Introductionmentioning

confidence: 99%

Study of defectoscopy of partially biodegradable LDPE films

Kibirkštis¹,

Miliūnas²,

Vaitasius³

et al. 2017

Vib. proced.

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Physical characteristics of the loaded new developed partially biodegradable LDPE polymeric films (containing sorbit, molasses and chitosan additives) with defects and without have been investigated experimentally by using the method of projection moiré. The first eigenmodes are analysed, graphical results of their investigation are presented. It was determined that the shape of the first vibrations eigenmode and the characteristics of vibrations have changed when the polymeric film had a tear defect. The results obtained could be applied for the determination of characteristics and qualities of new developed LDPE polymeric films.

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Experimental and finite element analysis of higher order behaviour of sandwich beams using digital projection moiré

Cited by 9 publications

References 34 publications

Localized damage response of carbon fiber reinforced polymer composite sandwich panel after thermal exposure

Localized damage response of carbon fiber reinforced polymer composite sandwich panel after thermal exposure

Application of the Wave Propagation Approach to Sandwich Structures: Vibro-Acoustic Properties of Aluminum Honeycomb Materials

Study of defectoscopy of partially biodegradable LDPE films

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