Investigation on the strength–size relationship in fibrous structures including composites

Pan, Ning; Chen, H. C; Thompson, James F.; Inglesby, Maria K.; Zeronian, S. H.

doi:10.1023/a:1004325907536

Cited by 10 publications

(10 citation statements)

References 13 publications

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“…Many studies [23][24][25][26][27] have shown that the tensile strength of single brittle filaments decreases with increasing length. This reported size effect is well documented for carbon fibres since they are almost completely brittle and show 100% elastic recovery below the fracture strength.…”

Section: Single Fibre Bundle Testingmentioning

confidence: 99%

Net shape spray deposition for compression moulding of discontinuous fibre composites for high performance applications

Luchoo

Harper

Bond

et al. 2010

Plastics, Rubber and Composites

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Details are presented of a novel carbon/epoxy spray deposition process for producing high performance, net shape charges for low flow compression moulding. The Bentley-Raycell automated carbon composite charge deposition (BRAC3D) process sprays powdered epoxy and chopped carbon bundles onto three-dimensional (3D) tools, offering a fully automated process with no touch labour. It has been demonstrated that fibre volume fractions of up to 54% are achievable for random discontinuous fibre architectures, with low void content (1?6%). This extends the volume fraction range currently offered by liquid moulding/preforming processes and potentially reduces part scrap rate, since the resin flow direction is through thickness rather than in-plane. Results from an experimental programme are presented, which aims to benchmark the BRAC3D material against commercial advanced moulding compounds. Ultimate tensile strength, tensile modulus and Charpy impact values are reported to be 272 MPa, 44?4 GPa and 128 kJ m 22 respectively, for the random fibre architecture at a fibre volume fraction of 54%. This equates to a 99% stiffness retention and a 59% strength retention compared to a continuous fibre, quasi-isotropic counterpart. Observed trends for increasing fibre volume fraction and fibre length have been compared against finite element predictions and an analytical inclusion model. Simulations from a parametric cost model indicate that the BRAC3D process is cost effective for production volumes exceeding 1100 ppa for a structural demonstrator component, compared with prepreg and resin transfer moulding.

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Section: Single Fibre Bundle Testingmentioning

confidence: 99%

Net shape spray deposition for compression moulding of discontinuous fibre composites for high performance applications

Luchoo

Harper

Bond

et al. 2010

Plastics, Rubber and Composites

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“…Recent research 101,102 has revealed more information about the importance of specimen length. Contrary to a common assumption that the initial modulus of a fiber is independent of its length, it was found that the initial modulus decreases as the gauge length is reduced, because the test length affects the strength and breaking strain of the product by different amounts.…”

Section: Size or Scale Problemsmentioning

confidence: 99%

“…Pan et al 102 have performed another experimental work to examine the size effect at different levels of fibrous structures with a series of tensile tests on single fibers, fiber bundles, and yarns. Three types of filaments, polypropylene, polyester, and nylon-66 were selected for the project.…”

Section: The Size Effect At Different Levels Of Fibrous Structuresmentioning

confidence: 99%

Physical properties of twisted structures. II. Industrial yarns, cords, and ropes

Pan

Brookstein

2001

J of Applied Polymer Sci

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ABSTRACT:In this article, we review the progress made in the area of industrial twisted fibrous structures. First, we focus on the general geometrical description of the structures, and then move to issues including the tensile behavior and fracture process. The effects of fiber bending and torsion, strain rate, and viscoelasticity are also discussed. The influences of both dynamic and fatigue loadings are studied as well. Discussion on the fiber blending and on the behavior of blended hybrid structures is provided. Further, a special section is included in which six specific topical areas, their significance toward textile science, and the progress made in these areas are introduced and summarized. Finally, experimental issues are discussed. Although this article is intended to serve as a complete review of the subject, because of the limit of both time and space, we can only focus on the areas in which we are most familiar. This article, therefore, is by no means exhaustive or authoritative in every topic discussed.

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“…The complexity of the strength research problems is determined by the fact that mechanical properties, including tensile strength, are the result of random and non-linear interactions of a huge number of fibers in the structure of the fibrous material [5]- [11]. Traditional methods that study the mechanical properties of fibrous materials are based on analytical modeling [12]- [17] or on regression models and models of artificial intelligence which in their turn are based on experimental data [3] [18]- [20]. These models do not take into account the characteristics of individual fibers and interactions between individual fibers.…”

Section: Introductionmentioning

confidence: 99%

A Combined Discrete Event—Agent Based Approach to Modeling Tensile Strength of One-Dimensional Fibrous Materials. Face Validation and Effect of the Basic Model Parameters

Cherkassky

Bumagin²

2015

JTST

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A combined method of discrete event and agent based modelling has been applied to the computer modelling and simulation of the tensile strength of one-dimensional fibrous materials (ODFM). This combined method is based on the concept of discrete event simulation as being applied to the modeling of the structure of the fiber flow and on the concept of agent based modelling for modelling and simulation of the fiber interaction within the structure of the fibrous material. Frictional and traction forces arise as the result of this fiber interaction. A model of the ODFM tensile strength, which is based on the slippage effect, is created and studied in this research. Only frictional and traction forces determine the tensile strength in this kind of the model. The article examines the validation problem of the slippage effect based tensile strength model and questions regarding the strength potential estimation through variation in the parameters of the model.

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Investigation on the strength–size relationship in fibrous structures including composites

Cited by 10 publications

References 13 publications

Net shape spray deposition for compression moulding of discontinuous fibre composites for high performance applications

Net shape spray deposition for compression moulding of discontinuous fibre composites for high performance applications

Physical properties of twisted structures. II. Industrial yarns, cords, and ropes

A Combined Discrete Event—Agent Based Approach to Modeling Tensile Strength of One-Dimensional Fibrous Materials. Face Validation and Effect of the Basic Model Parameters

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