An Experimental and Numerical Study to Evaluate the Crack Path Under Mixed Mode Loading on PVC Foams

Bruno, Domenico; Fabbrocino, Francesco; Funari, ‪Marco Francesco; Greco, Fabrizio; Lonetti, Paolo; Spadea, Saverio

doi:10.1007/978-3-030-41057-5_31

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…Sandwich structures are multilayer physical members composed of two stiff face sheets bonded to a core layer. Core layers usually consist of metallic and non-metallic honeycomb core, open and closed cell foams, and balsa wood [1][2][3][4][5]. One of the promising ways to reduce material cost and weight is to utilize honeycomb structures of various shapes.…”

Section: Introductionmentioning

confidence: 99%

Sound Transmission Loss of a Honeycomb Sandwich Cylindrical Shell with Functionally Graded Porous Layers

et al. 2022

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To examine the acousto-structural behavior of a sandwich cylindrical shell benefiting from hexagonal honeycomb structures in its core and functionally graded porous (FGP) layers on its outer and inner surfaces, a comprehensive study based on an analytical model which also considers the effect of an external flow is conducted. A homogenous orthotropic model is used for the honeycomb core while its corresponding material features are found from the modified Gibson’s equation. The distribution pattern of FGP parts is either even or logarithmic-uneven, and a special rule-of-mixture relation governs their properties. Based on the first-order shear deformation theory (FSDT), Hamilton’s principle is exploited to derive the final coupled vibro-acoustic equations, which are then solved analytically to allow us to calculate the amount of sound transmission loss (STL) through the whole structure. This acoustic property is further investigated in the frequency domain by changing a set of parameters, i.e., Mach number, wave approach angle, structure’s radius, volume fraction, index of functionally graded material (FGM), and different honeycomb properties. Overall, good agreement is observed between the result of the present study and previous findings.

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Section: Introductionmentioning

confidence: 99%

Sound Transmission Loss of a Honeycomb Sandwich Cylindrical Shell with Functionally Graded Porous Layers

et al. 2022

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“…In the field of RC beams reinforced with FRCM and SRG system, a challenging area is monitoring the strain evolution on the strengthened area. In this framework, Digital Image Correlation (DIC) technique is spreading a great interest in the research community because of its low costs, effectiveness and capacity to monitoring the displacements and strains during experimental tests [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

The Effectiveness of the DIC as a Measurement System in SRG Shear Strengthened Reinforced Concrete Beams

Funari

Verre

2021

Crystals

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Steel Reinforced Grout (SRG) materials are generating considerable interest as strengthening system of reinforced concrete (RC) structures. They are finding increasing use in several civil engineering applications mainly due to the advantages they offer over traditional material such as high strength to weight ratio, ease of application, durability and low price. This paper describes the results of an experimental investigation carried out on SRG shear strengthened RC beams and gives evidence of the Digital Image Correlation (DIC) effectiveness as a measurement system. The tests performed had two main objectives: (i) assess the effectiveness of continuous and discontinuous U-wrapped jackets comprising a different number of layers and strips; (ii) assess the shear crack distribution during the tests by means of the DIC measurements. The results confirmed that reinforcing RC beams with SRG jackets can increase the load-bearing capacity; when the beam was reinforced with a continuous two-layered SRG strip, an increase of 84% was observed (compared to the unreinforced beam). The Linear Variable Differential Transformers (LVDT) measurements validated the results obtained by means of the DIC.

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“…As a consequence, in order to avoid some of the issues previously mentioned, numerical models based on moving mesh methodology (a numerical tool widely used in various engineering problems [27,28]) were developed.…”

Section: Introductionmentioning

confidence: 99%

A Moving Interface Finite Element Formulation to Predict Dynamic Edge Debonding in FRP-Strengthened Concrete Beams in Service Conditions

Funari

Spadea

Fabbrocino

2020

Fibers

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A new methodology to predict interfacial debonding phenomena in fibre-reinforced polymer (FRP) concrete beams in the serviceability load condition is proposed. The numerical model, formulated in a bi-dimensional context, incorporates moving mesh modelling of cohesive interfaces in order to simulate crack initiation and propagation between concrete and FRP strengthening. Interface elements are used to predict debonding mechanisms. The concrete beams, as well as the FRP strengthening, follow a one-dimensional model based on Timoshenko beam kinematics theory, whereas the adhesive layer is simulated by using a 2D plane stress formulation. The implementation, which is developed in the framework of a finite element (FE) formulation, as well as the solution scheme and a numerical case study are presented.

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An Experimental and Numerical Study to Evaluate the Crack Path Under Mixed Mode Loading on PVC Foams

Cited by 5 publications

References 25 publications

Sound Transmission Loss of a Honeycomb Sandwich Cylindrical Shell with Functionally Graded Porous Layers

Sound Transmission Loss of a Honeycomb Sandwich Cylindrical Shell with Functionally Graded Porous Layers

The Effectiveness of the DIC as a Measurement System in SRG Shear Strengthened Reinforced Concrete Beams

A Moving Interface Finite Element Formulation to Predict Dynamic Edge Debonding in FRP-Strengthened Concrete Beams in Service Conditions

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