Moisture absorption and mechanical degradation studies of polyurethane foam cored E-glass-reinforced vinyl-ester sandwich composites

Manujesh, B J; Rao, Vijayalakshmi; Aan, MP Sham

doi:10.1177/0731684413503720

Cited by 20 publications

(11 citation statements)

References 30 publications

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“…A similar finding has also been discussed by Li and Weitsman . Several other studies also observed that the polymeric foam core degrades after a long‐time exposure to fluid, see for example Avilés and Aguilar‐Montero and Manujesh et al . Morganti et al studied the effects of moisture on sandwich composites and reported that fluid diffusion degraded the matrix elastic properties and induced microcracks between fibers and matrix.…”

Section: Introductionsupporting

confidence: 71%

Multi‐scale analysis of diffusion of fluid in sandwich composites

et al. 2019

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This study presents a multiscale analysis for describing the fluid diffusion in polymeric sandwich composites, comprising of glass-epoxy fiber reinforced polymer (FRP) skins and polyurethane foam core. The multiscale framework includes the unit-cell micromechanics model for determining the overall diffusion behavior in the FRP skins by incorporating different diffusivities of the fiber and matrix and the diffusion model for foam core. In addition, multiscale diffusion tests have been conducted for the sandwich composites, FRP skins, foam core, and epoxy resin. The specimens were immersed in deionized water at 50 C. The capability in predicting the overall diffusion behavior of sandwich composites while recognizing the different diffusion processes of the constituents is not only beneficial for designing polymeric sandwich composites with desired performance but also enhances understanding on the durability of polymeric sandwich composites. POLYM. COMPOS., 40:3520-3532, 2019.

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Section: Introductionsupporting

confidence: 71%

Multi‐scale analysis of diffusion of fluid in sandwich composites

et al. 2019

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“…Apart from the mechanical behavior of PUF sandwiches, some researchers in past years have studied their response in other areas such as moisture absorption, insulating behavior and damping response etc. Manujesh et al studied the effects of moisture absorption on the mechanical behavior of PUF sandwich composites. Four different types of sandwich specimens were manufactured using woven roving (WR), chopped strand mat (CSM), stitched bond mat (SBM) and chopped strand stitched mat (CSM‐S) fabrics for face sheets.…”

Section: Puf Core Sandwich Structuresmentioning

confidence: 99%

“…A, Specimen with PUF core density of 100 kg/m 3 . B, Specimen with PUF core density of 300 kg/m 3 [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Puf Core Sandwich Structuresmentioning

confidence: 99%

A review on recent advances in sandwich structures based on polyurethane foam cores

et al. 2020

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Sandwich composites with a polyurethane foam (PUF) core have become a versatile set of materials with applications ranging from basic construction elements to advanced engineering materials. This diverse range of applications has provided these sandwich materials with a distinctive position in today's engineering world. This review focuses on the broad research that has been carried out on PUF core‐based sandwich composites over the years—especially in the last decade. Thorough details have been presented focusing on basic PUF core sandwich structures, advanced PUF core sandwich composites with different kinds of reinforcements and complex structures such as hybrid sandwich panels. All the research presented here has been categorized carefully, such as the types of materials used in various studies, the types of reinforcements and testing techniques used, including mechanical, electrical, dynamic, thermal and acoustic methods etc. Comparisons have also been made based on similar materials, similar testing procedures and similar application areas. Research areas have been highlighted by giving a deep insight into the most promising research, manufacturing techniques and improvement procedures. Major consumption areas and application sectors for PUF core sandwich composites have also been discussed in this review. Finally, conclusions have been made based on the results found from a literature investigation.

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“…Additional studies [11][12][13] have also indicated that polymer foams' mechanical properties are substantially affected by moisture absorption. Several researchers [14][15][16] investigated the mechanical degradation of foam-cored sandwich structures exposed to varying hygrothermal conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimentation and simulation of moisture diffusion in foam-cored polyurethane sandwich structure

Huo

Mohamed

Nicholas

et al. 2015

Jnl of Sandwich Structures & Materials

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The moisture diffusion behavior of two-part thermoset polyurethane neat resin, woven E-glass fiber-reinforced polyurethane face sheet, closed-cell rigid polyurethane foam core and their corresponding sandwich specimens was investigated in this study. The vacuum-assisted resin transfer molding process was used to manufacture the polyurethane sandwich panels. Open-edge moisture diffusion experiment was conducted for sandwich panel and its constituents by immersing each type of samples in distilled water at room temperature for nearly seven months. Moisture diffusivities and solubility for neat resin, face sheet and foam core specimens were characterized according to the experimental analysis. The moisture diffusion behavior for closed-cell polyurethane foam was found to deviate significantly from classical Fick's law, and a multi-stage diffusion model was thus proposed to explain this deviation using a time-dependent diffusivity scheme. A user-defined subroutine was developed to implement this scheme into the commercial finite element analysis code ABAQUS. A three-dimensional dynamic finite element model was developed to predict the moisture diffusion behavior in neat resin, face sheet, foam core and sandwich specimens. This finite element model was then validated by comparing simulation results with experimental findings.

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Moisture absorption and mechanical degradation studies of polyurethane foam cored E-glass-reinforced vinyl-ester sandwich composites

Cited by 20 publications

References 30 publications

Multi‐scale analysis of diffusion of fluid in sandwich composites

Multi‐scale analysis of diffusion of fluid in sandwich composites

A review on recent advances in sandwich structures based on polyurethane foam cores

Experimentation and simulation of moisture diffusion in foam-cored polyurethane sandwich structure

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