Bending deflection of sandwich beams considering local effect of concentrated force

Cernescu, Anghel; Romanoff, Jani

doi:10.1016/j.compstruct.2015.08.074

Cited by 10 publications

(8 citation statements)

References 10 publications

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“…In the literature, numerous works on these subjects and describing the different structures of materials are presented. Here are just a few of the many works describing the bending characterization [6][7][8][9][10] and falling weight impact test devices that have been reported [11][12][13]. In addition to the knowledge of the mechanical behaviour of these sandwich structures, the structural complexity of these ones requires additional means.…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission description from a damage and failure scenario of rotomoulded polyolefin sandwich structure subjected to internal pressure for storage applications

Lainé

Grandidier

Cruz

et al. 2020

Mechanics & Industry

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The aim of this paper is to study the damage mechanisms in a sandwich polymer structure that contains three layers: two polyolefin skins and the foam core (skin–foam–skin). Specific tests on structure associated with the acoustic emission (AE) technique and tomographic observations (RX) are used to identify the damage. Initially, a conventional tensile test was performed to correlate the acoustic emission with the initiation of plasticity and damage to a polyethylene sample. The results obtained are close to those observed in other studies and it is possible to separate the signal from cavitation and propagation of necking. The technique is then employed to capture the rupture of a polymer skin on a multilayer rotomoulded structure (bottle). Tests were carried out on this bottle under internal water pressure. Three tests are performed with more or less early interruptions in order to identify the first damage and understand their evolution. Different quantities (average frequency, RA value, etc.) are observed in order to quantify and understand the perceived damage. With the AE/RX correlation and mechanical behaviour, a scenario of structural damage is proposed.

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Section: Introductionmentioning

confidence: 99%

Acoustic emission description from a damage and failure scenario of rotomoulded polyolefin sandwich structure subjected to internal pressure for storage applications

Lainé

Grandidier

Cruz

et al. 2020

Mechanics & Industry

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“…In order to validate the software, experimental data reported by [6] were compared with the results obtained by Sancomp. The author performed a three-point bending test in sandwich beams composed by aluminium and foam core, measuring their transverse displacement.…”

Section: Resultsmentioning

confidence: 99%

“…Second [5][6], in a first moment, the behavior of a sandwich beam can be analyzed according to the use of the classical beam theories, as long as being considered the different proprieties of the involved materials, and the transverse shear effect in the displacements. Therefore, it is necessary to use Timoshenko's theory or a higher order in the transverse shear.…”

Section: Sandwich Beam Bendingmentioning

confidence: 99%

Analysis of Sandwich Beams Using Timoshenko's Beam Theory Assisted by Software

Silva¹,

Menezes²,

Amico³

2017

Anais Do(a) VI International Symposium on Solid Mechanics

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“…On the other hand, sandwich concept selection brings also some problems related to its macrostructure [8,15,16]. The result of sandwich wall geometrical and material parameters is layered, and thus considerably inhomogeneous element, where some its aspects of mechanical behavior can vary considerably compared to conventional homogeneous wall [17].…”

Section: Introductionmentioning

confidence: 99%

On Flexural Stiffness of Polymer Sandwich Walls

Šuba

Fojtl

Sýkorová

et al. 2016

MSF

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Abstract. This paper deals with the flexural stiffness of sandwich structures based on fiberglass and polymeric foams. The influence of geometrical and material parameters on the resulting effective flexural stiffness of the sandwich structure is being studied experimentally, analytically and using FEM models. The effective elasticity module of the sandwich-structured element is being studied and it's theoretical and model dependencies on the stiffness of the foam core are being investigated. These dependencies are then compared with experimentally observed values. This study shows it is necessary to pay special attention to the issue of flexural stiffness of walls when designing sandwich shell products in order to prevent possible failures in the practical applications of these types of structures.

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Bending deflection of sandwich beams considering local effect of concentrated force

Cited by 10 publications

References 10 publications

Acoustic emission description from a damage and failure scenario of rotomoulded polyolefin sandwich structure subjected to internal pressure for storage applications

Acoustic emission description from a damage and failure scenario of rotomoulded polyolefin sandwich structure subjected to internal pressure for storage applications

Analysis of Sandwich Beams Using Timoshenko's Beam Theory Assisted by Software

On Flexural Stiffness of Polymer Sandwich Walls

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