Effect of fiber and bond strength variations on the tensile stiffness and strength of fiber networks

Borodulina, Svetlana; Motamedian, Hamid Reza; Kulachenko, Artem

doi:10.1016/j.ijsolstr.2016.12.013

Cited by 52 publications

(43 citation statements)

References 26 publications

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“…However, simulations have shown that even floppy or sub-isostatic networks can be rigidified by an external deformation 13,17,18 or by the presence of additional interactions such as a bending rigidity. 6,10,11,[19][20][21][22][23] These recent studies suggest that if the static network structure and the element strength of a soft athermal material are known, the material response can be predicted based on the physical concept of rigidity.…”

Section: Introductionmentioning

confidence: 99%

The role of temperature in the rigidity-controlled fracture of elastic networks

et al. 2020

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Section: Introductionmentioning

confidence: 99%

The role of temperature in the rigidity-controlled fracture of elastic networks

et al. 2020

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“…To do so, the generated network was discretized using nonlinear 3-node Timoshenko/Reissner beam elements (Ibrahimbegović 1995) with either solid or hollow rectangular cross-sections. The inter-fiber bonds were simulated as bonded (adhesive) beam-tobeam contact elements (Motamedian 2016(Motamedian , 2018) with a separation criteria. A more detailed description and demonstration of application of the formulations can be found in (Borodulina et al 2016;Kulachenko 2018, 2019).…”

Section: Simulation Methodsmentioning

confidence: 99%

“…The inter-fiber bonds were simulated as bonded (adhesive) beam-tobeam contact elements (Motamedian 2016(Motamedian , 2018) with a separation criteria. A more detailed description and demonstration of application of the formulations can be found in (Borodulina et al 2016;Kulachenko 2018, 2019). The geometric, mechanical, and discretization parameters that were used in the simulations are listed in Table 10.…”

Section: Simulation Methodsmentioning

confidence: 99%

Mechanisms of strength and stiffness improvement of paper after PFI refining with a focus on the effect of fines

2019

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Refining (i.e., mechanical beating of pulp) is a common procedure that is used in paper-making to improve the mechanical properties of the final product. The improvements caused by refining are mainly attributed to increased density and to a better bonding between fibers. In this work, we study how various mechanisms that can be triggered by refining affect the tensile behavior of the sheets. Consequently, we use direct numerical simulations of fiber networks. We relate our finding to the experimental measurements that we conducted on handsheets. We have found that fibrillar fines with size distributions below the resolution of modern state-of-the art pulp characterization tools have a substantial contribution to the increased strength and stiffness of the sheets.

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“…Furthermore, these values are related and comply with the tensile properties of natural fiber composites [48], while the difference between the precursor fiber in tensile strength is ascribed to their slightly different microstructure, which is affected by extrusion speed, temperature, and residence time of the materials in the extrusion line and the size of the spinneret [49]. Further, the tensile deformation and damage of fibers are strongly affected by both defects and orientation [50], while the chemical bonding has a severe impact on stiffness and tensile strength of fiber network [51].…”

Section: Tensile Testing Of Precursor Fibersmentioning

confidence: 99%

Synthesis and Processing of Melt Spun Materials from Esterified Lignin with Lactic Acid

et al. 2019

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In this study, the carbon fiber manufacturing process is investigated, using high-density polyethylene (HDPE) and esterified lignin either with lactic acid (LA) or with poly(lactic acid) (PLA) as precursors. More specifically, lignin was modified using either LA or PLA in order to increase its chemical affinity with HDPE. The modified compounds were continuously melt spun to fibrous materials by blending with HDPE in order to fabricate a carbon fiber precursor. The obtained products were characterized with respect to their morphology, as well as their structure and chemical composition. Moreover, an assessment of both physical and structural transformations after modification of lignin with LA and PLA was performed in order to evaluate the spinning ability of the composite fibers, as well as the thermal processing to carbon fibers. This bottom–up approach seems to be able to provide a viable route considering large scale production in order to transform lignin in value-added product. Tensile tests revealed that the chemical lignin modification allowed an enhancement in its spinning ability due to its compatibility improvement with the commercial low-cost and thermoplastic HDPE polymer. Finally, stabilization and carbonization thermal processing was performed in order to obtain carbon fibers.

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Effect of fiber and bond strength variations on the tensile stiffness and strength of fiber networks

Cited by 52 publications

References 26 publications

The role of temperature in the rigidity-controlled fracture of elastic networks

The role of temperature in the rigidity-controlled fracture of elastic networks

Mechanisms of strength and stiffness improvement of paper after PFI refining with a focus on the effect of fines

Synthesis and Processing of Melt Spun Materials from Esterified Lignin with Lactic Acid

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