Processing and Properties of a Polymer/Composite Double‐Layer Laminate

Salomi, A.; Greco, Antonio; Pacifico, T.; Rametta, Rocco; Maffezzoli, Alfonso

doi:10.1002/adv.20267

Cited by 10 publications

(6 citation statements)

References 18 publications

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“…Alternatively, reinforced rotomolded products can be produced by the inclusion of long fibers, by using thermoplastic prepreg in a bladder molding process [11,12]. This technology, however, has serious limitations for the production of complex geometries.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Mechanical Analysis of Polyethylene Homo-Composites Processed by Rotational Molding

et al. 2019

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This work is aimed at studying the suitability of ultra-high molecular weight polyethylene (UHMWPE) fibers for the production of polyethylene homo-composites processed by rotational molding. Initially pre-impregnated bars were produced by co-extrusion and compression molding of UHMWPE fibers and linear low-density polyethylene (LLDPE). A preliminary screening of different processing routes for the production of homo-composite reinforcing bars was performed, highlighting the relevance of fiber impregnation and crystalline structure on the mechanical properties. A combination of co-extrusion and compression molding was found to optimize the mechanical properties of the reinforcing bars, which were incorporated in the LLDPE matrix during a standard rotational molding process. Apart from fiber placement and an increase in processing time, processing of homo-composites did not require any modification of the existing production procedures. Plate bending tests performed on rotational molded homo-composites showed a modulus increase to a value three times higher than that of neat LLDPE. This increase was obtained by the addition of 4% of UHWMPE fibers and a negligible increase of the weight of the component. Dart impact tests also showed an increased toughness compared to neat LLPDE.

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Section: Introductionmentioning

confidence: 99%

Thermal and Mechanical Analysis of Polyethylene Homo-Composites Processed by Rotational Molding

et al. 2019

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“…Moreover, depending on loading direction, different flexural strengths were obtained for a structure. For instance, flexural strength of 40(1)-0.6-10(2) (22.5 MPa) was 16% higher than 10(2)-0.6-40(1) (19.1 MPa) which confirmed the dominant role of the skins on flexural strength of sandwich panels [25].…”

Section: Resultsmentioning

confidence: 85%

Mechanical characterization of asymmetric high density polyethylene/hemp composite sandwich panels with and without a foam core

Kavianiboroujeni

Cloutier

Rodrigue

2015

Jnl of Sandwich Structures & Materials

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This work investigates the effects of different design parameters such as hemp content in the skins (10-40% wt.), layer thickness (1 and 2 mm), and foaming agent content in the core (0% wt., 0.6% wt. and 1.2% wt.) on the flexural properties of three layer sandwich panels of hemp and high density polyethylene produced by compression molding. The results show that hemp content was the most significant parameter for the flexural properties of these panels. In addition, it was found that specific modulus and strength (per unit weight) were 30% and 36% higher when using a foam core, respectively.

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“…The failure of the sandwich specimen due to compressive failure of the skin is calculated by equating the moments within the sandwich specimen to the applied external bending moment. This gives a relation 30 where σ p (MPa) is the bending strength, M is the moment about the neutral axis, E is the tensile facing modulus, E p is the compressive modulus of elasticity of the skins and I is the second moment of area about the neutral axis. So, the peak strength P p (N) for this failure mode to occur can be predicted by equation (7).…”

Section: Resultsmentioning

confidence: 99%

Analytical and numerical study based on experimental investigation of different curved sandwich composites manufactured by filament winding process

Haddad

Guillaumat

Crozatier

2017

Journal of Composite Materials

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Sandwich structures, due to their high stiffness versus lightness ratio, are used progressively in high performance products. In order to design these structures with the most appropriate dimensions and material combinations, relevant mechanical properties must be well understood. This work aims to estimate the elastic properties of composite sandwiches from a curved structure taking into account the manufacturing process. In the case of filament winding process, specimens are necessarily cylindrical or barrel extracted. In our case, these types of structures are tested in 3-and 4-point bending to analyze their behavior experimentally using predictive models and design rules. Different conEgurations are adopted for bending tests to analyze and discuss global mechanical behavior. Furthermore, the acoustic emission technique is used to detect the initial appearance of damage mechanisms and to examine their evolution in terms of amplitude peaks and localization. Finally, a correlation between these acoustic emission signals and the damage initiation mechanisms is proposed, considering their effects on the mechanical behavior of each tested material.

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Processing and Properties of a Polymer/Composite Double‐Layer Laminate

Cited by 10 publications

References 18 publications

Thermal and Mechanical Analysis of Polyethylene Homo-Composites Processed by Rotational Molding

Thermal and Mechanical Analysis of Polyethylene Homo-Composites Processed by Rotational Molding

Mechanical characterization of asymmetric high density polyethylene/hemp composite sandwich panels with and without a foam core

Analytical and numerical study based on experimental investigation of different curved sandwich composites manufactured by filament winding process

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