Fracture toughness of rigid polymeric foams: A review

Marșavina, Liviu; Linul, Emanoil

doi:10.1111/ffe.13327

Cited by 45 publications

(17 citation statements)

References 119 publications

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“…Despite the type of use, once micro-cracks have been created within FRP materials, the sincerity of the composite construction is automatically negotiated. On the other hand, exposure to high operating temperatures can lead to the occurrence of the softening phenomenon and to the degradation of the main properties [144][145][146][147].…”

Section: Environmental Propertiesmentioning

confidence: 99%

Manufacturing Technologies of Carbon/Glass Fiber-Reinforced Polymer Composites and Their Properties: A Review

Rajak¹,

Wagh²,

Linul

2021

Polymers

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131

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Over the last few years, there has been a growing interest in the study of lightweight composite materials. Due to their tailorable properties and unique characteristics (high strength, flexibility and stiffness), glass (GFs) and carbon (CFs) fibers are widely used in the production of advanced polymer matrix composites. Glass Fiber-Reinforced Polymer (GFRP) and Carbon Fiber-Reinforced Polymer (CFRP) composites have been developed by different fabrication methods and are extensively used for diverse engineering applications. A considerable amount of research papers have been published on GFRP and CFRP composites, but most of them focused on particular aspects. Therefore, in this review paper, a detailed classification of the existing types of GFs and CFs, highlighting their basic properties, is presented. Further, the oldest to the newest manufacturing techniques of GFRP and CFRP composites have been collected and described in detail. Furthermore, advantages, limitations and future trends of manufacturing methodologies are emphasized. The main properties (mechanical, vibrational, environmental, tribological and thermal) of GFRP and CFRP composites were summarized and documented with results from the literature. Finally, applications and future research directions of FRP composites are addressed. The database presented herein enables a comprehensive understanding of the GFRP and CFRP composites’ behavior and it can serve as a basis for developing models for predicting their behavior.

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Section: Environmental Propertiesmentioning

confidence: 99%

Manufacturing Technologies of Carbon/Glass Fiber-Reinforced Polymer Composites and Their Properties: A Review

Rajak¹,

Wagh²,

Linul

2021

Polymers

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131

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“…On other hand, the fracture criterion based on the stress intensity factor K I and on the critical value, also known as fracture toughness K IC : K I ≤ K IC , could be successfully applied to structures made of PUR foams. The size effect shows that for large PUR foams structures the linear elastic fracture mechanics applies [13,27] and the fracture parameters have a crucial role on the integrity assessment.…”

Section: Discussionmentioning

confidence: 99%

“…However, often the methodology proposed in [7] was adopted for determination of fracture toughness of polymeric foams, considering Single Edge Notched Specimens loaded in Three-Point Bending [8][9][10], respectively Compact Tension specimens [11]. Jelitto and Schneider [12] revised the experimental methods and the fracture toughness data of porous materials including PUR foams, respectively Marsavina and Linul [13] presented a review of the fracture of polymeric foams.…”

Section: Introductionmentioning

confidence: 99%

Is Fracture Toughness of PUR Foams a Material Property? A Statistical Approach

et al. 2020

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The published data on the experimentally determined fracture toughness of foams are based on a small number of specimens, having a lack of statistical consistency. The paper proposes a statistical approach on the fracture toughness results of rigid polyurethane (PUR) foams of three different densities. Five types of fracture tests were considered. The results were statistically analyzed using six types of regressions and a meta-analysis to identify the factors influencing the fracture toughness. The statistical analysis indicates that the fracture toughness represents a material property because does not depend on the specimen type. The density plays a major role in the fracture toughness of PUR foams. The irregular shape of the cells induced small anisotropy for low-density foams (100 kg/m3 and 145 kg/m3). This effect could not be observed for the foam with 300 kg/m3 density, for which the cells have a more regular spherical shape. The statistical analysis indicates that the influence of the loading speed is very weak.

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“…Micromechanical models allow the prediction of the mechanical properties of cellular materials based on the properties of solid material from the cell edges (density of solid material ρ s , Young's modulus E s , yield stress σ ys ), density of cellular material ρ*, and some cellular topology characteristics: length or diameter of cells l and cell wall thickness t. 24,25…”

Section: Cellular Materialsmentioning

confidence: 99%

The application of the Theory of Critical Distances to nonhomogeneous materials

Marșavina

Sapora

Susmel

et al. 2023

Fatigue Fract Eng Mat Struct

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The Theory of Critical Distances (TCD) has undoubtedly represented a breakthrough in the brittle failure assessment of engineering materials containing defects, crack, or notches. The basic idea on which the simplest formulation of the TCD is based is to evaluate an effective stress at a characteristic distance from the tip of the defect/crack/notch and compare it with an inherent fracture strength. Is the critical distance related to the material (micro) structure? Whereas a correlation was already proved for homogeneous materials, the current attention to nonhomogeneous ones has brought the question back to the fore. The goal of the present work is therefore twofold: (i) to extend the use of the TCD, through the simple yet effective Point Method (PM), for the static failure assessment of inhomogeneous materials, such as cellular, biological, and additively manufactured (AM) materials; and (ii) to look for a correlation between critical distance and internal (micro) structure.

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Fracture toughness of rigid polymeric foams: A review

Cited by 45 publications

References 119 publications

Manufacturing Technologies of Carbon/Glass Fiber-Reinforced Polymer Composites and Their Properties: A Review

Manufacturing Technologies of Carbon/Glass Fiber-Reinforced Polymer Composites and Their Properties: A Review

Is Fracture Toughness of PUR Foams a Material Property? A Statistical Approach

The application of the Theory of Critical Distances to nonhomogeneous materials

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