Mechanical properties of sandwich composite made of syntactic foam core and GFRP skins

Salleh, Zulzamri; Islam, Mainul; Epaarachchi, Jayantha; Su, Haibin

doi:10.3934/matersci.2016.4.1704

Cited by 18 publications

(13 citation statements)

References 30 publications

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“…Still, syntactic foam core is mainly preferred because of its high bending rigidity, good thermal insulation, better acoustic damping characteristics, and lighter weight. 1,2 Using syntactic foam as core material enhances weight-saving in marine applications and improves the sandwich structure's performance. 1,[3][4][5][6][7][8] The bending stiffness of the composite material can also be improved by using syntactic foam as a core in the sandwich composite.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of mechanical characterization of hybrid sandwich composites with syntactic foam core for structural applications

Afolabi

Kanny

Mohan

2023

Composites and Advanced Materials

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In this work, mechanical performance on sandwich composites consisting of syntactic foam filled with hollow glass microsphere in an epoxy resin matrix as the core material and hybrid kenaf/glass fibers face-sheet based composites panel is studied. The main purpose of this work is to design a suitable lightweight composite panel material for structural application. Four different sequences of face-sheet reinforcement (e.g., kenaf-kenaf; glass-glass; glass-kenaf, and kenaf-glass) were adopted. In this study, the mechanical properties and failure modes are carefully investigated. The sandwich composites were characterized by compressive, tensile, and flexural properties. The results showed that compressive strength was highest at the “kenaf-glass” face-sheets, tensile strength was highest at “glass-glass” face-sheets, and flexural at “glass-glass” face-sheets with 52.1%, 67.6%, and 74.4% increase to “kenaf-kenaf” face-sheets, respectively. The tensile strength and modulus values with the specific strengths and modulus values showed that the mechanical properties of the sandwich composites can be influenced by hybridizing the face-sheet laminates of the composite. This shows that kenaf fiber has limited strength when used as reinforcement alone but gave an excellent performance when combined with glass fiber.

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Section: Introductionmentioning

confidence: 99%

“…1,2 Using syntactic foam as core material enhances weight-saving in marine applications and improves the sandwich structure's performance. 1,[3][4][5][6][7][8] The bending stiffness of the composite material can also be improved by using syntactic foam as a core in the sandwich composite.…”

Section: Introductionmentioning

confidence: 99%

Investigation of mechanical characterization of hybrid sandwich composites with syntactic foam core for structural applications

Afolabi

Kanny

Mohan

2023

Composites and Advanced Materials

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“…12,14 Isophthalic and orthophthalic polyesters, along with glass or carbon fibers, are commonly used resin materials in marine applications. 15 In a study conducted by Salleh et al, 16 syntactic foam core sandwich panels were investigated, comprising glass fiber-reinforced polymer skin and glass microballoons with varying weight percentages of glass microballoon contents. The findings revealed that higher glass microballoon content significantly influenced the load-deflection behavior of the syntactic foam core sandwich panels, resulting in increased deflections.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on mechanical performance of PVC foam‐based E‐glass isophthalic polyester composites

Ojha,

Bisaria,

Mohanty

et al. 2023

Polymer Composites

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The present research paper investigates the chemical, thermal, mechanical, thermo‐mechanical properties, and fractography of sandwich composites made from E‐glass‐reinforced isophthalic polyester with Poly Vinyl Chloride (PVC) foam as a core by hand. These composites are commonly used in marine applications and manufactured by hand lay‐up method. A comparison is made between the properties of the PVC foam polyester sandwich composite with E‐glass layers on both sides (SC1) and the PVC foam isophthalic polyester sandwich composite with double layers of E‐glass on both sides (SC2) in relation to single‐layer E‐glass. Fourier transform infrared (FTIR) spectroscopy is employed to analyze the chemical composition of the composites. Various mechanical properties, including impact strength, flexural strength (FS), fracture toughness, and tensile strength (TS), are evaluated for the fabricated composites. Thermo‐mechanical and thermal properties are examined using dynamic mechanical analysis and thermogravimetric analysis (TGA), respectively. The chemical analysis identifies the unsaturation sites of (CH2)n, carbonyl group CO of the ester group, and the stretching of CH and CH3. The mechanical properties of SC2 composites are observed to be superior to those of SC1 composites. TGA revealed that both SC1 and SC2 composites showcased comparable temperature‐dependent weight loss patterns. Nonetheless, the SC2 composite displayed elevated glass transition temperature values and superior damping properties, as indicated by its higher Tanδ values. Examination of the fractured surfaces using a scanning electron microscopy (SEM) micrograph reveals a honeycomb structure, matrix cracking, and fiber pullout.Highlights Examination of the chemical, thermal, mechanical, and thermo‐mechanical attributes of sandwich composites made from E‐glass‐reinforced isophthalic polyester with PVC foam as the core. Evaluation of the impact of E‐glass layering on the thickness of the composite skin. Analysis of interfacial properties through FTIR techniques. Assessment of mechanical properties like impact strength, FS, fracture toughness, and TS. Investigation of fracture surfaces using SEM.

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“…While the core materials can be made of honeycomb, corrugated plates, balsa wood, polymer, and aluminum foams, the face sheets are commonly made of very thin metal alloy sheets or fiber-reinforced polymer composites. The core material mainly resists shearing, provides civil infrastructures where lightweight and higher stiffness are the primary design considerations [9][10][11][12]. To characterize the mechanical behaviors of the sandwich composites, they are subjected to several testing methods under various loadings, e.g., low-velocity impact [13], flexural [14,15], edgewise and flatwise compression [9], and tensile [16] loads.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Out-of-Plane Compressive Performance of Lightweight Polymer Foam Core Sandwiches

Uzay

2021

Sakarya University Journal of Science

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This study investigates the flatwise compressive performance of the developed sandwiches with core stitching modification. Polyvinyl chloride (PVC) foam cores with a density of 0.048 g/cm 3 were stitched with 600-tex glass fiber yarns. Then the core materials were sandwiched with carbon/epoxy and glass/epoxy face sheets, respectively. The composite sandwich structures were produced by applying the vacuum bag method, and the composite layers were co-cured. The non-stitched foam core sandwiches were also manufactured as the benchmark. The developed sandwich panels were subjected to flatwise compression tests per the ASTM C365 Standard to obtain compressive properties. The mechanical testing showed that the stitched foam core sandwiches carried dramatically higher compressive loads and presented additional load peaks. Almost 80% and 90% enhancement were achieved in resistance to compressive forces for the sandwiches made of carbon/epoxy and glass/epoxy face sheets, respectively. Also, the increments in the compressive strength of the developed sandwich panels were found above 80% with a minimum weight penalty. Core stitching, providing the sandwich panels to have better out-of-plane strength, is a simple and less time-consuming through-thickness reinforcement process among the other core modification methods.

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Mechanical properties of sandwich composite made of syntactic foam core and GFRP skins

Cited by 18 publications

References 30 publications

Investigation of mechanical characterization of hybrid sandwich composites with syntactic foam core for structural applications

Investigation of mechanical characterization of hybrid sandwich composites with syntactic foam core for structural applications

Experimental investigation on mechanical performance of PVC foam‐based E‐glass isophthalic polyester composites

Enhancing the Out-of-Plane Compressive Performance of Lightweight Polymer Foam Core Sandwiches

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