On the mechanical response of randomly reinforced chopped-fibers composites: Data and model

Ioniţă, Axinte; Weitsman, Y.

doi:10.1016/j.compscitech.2006.01.019

Cited by 49 publications

(19 citation statements)

References 4 publications

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“…The laminated random strand (LRS) method was recently proposed by Ionita and Weitsman [2006] as an alternative, approximate, approach that allows for the rapid evaluation of a large number of fiber arrangements in a mostly in-plane random fiber orientation. Based on the composite laminate theory, and approximating the geometry as a series of pseudolayers of randomly oriented strands, the method does not account explicitly for out-of-plane fiber orientations or for strand overlaps.…”

Section: Validation Approachesmentioning

confidence: 99%

“…We note that due to the completely automated nature of the analysis meshing may fail in regions of high geometric complexity, which requires that the model is also automatically checked for complete meshing of all components, as well as for the existence of distorted elements, as shown by the failed meshing check block in Figure 8. In order to analyze the transverse isotropy of the material we consider a measure similar to the one adopted by Ionita and Weitsman [2006]: We also propose a measure of statistical inhomogeneity in the material,…”

Section: Automated Fem Analysismentioning

confidence: 99%

“…First, we rely on the orientation averaging scheme of Advani and Tucker [1987] to determine the elastic constants of the random composite based on those of the equivalent material with fully aligned fibers. Second, we employ the LRS method recently proposed by Ionita and Weitsman [2006] as a way of rapidly evaluating the properties of large numbers of fiber arrangements.…”

Section: Validation Approachesmentioning

confidence: 99%

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Numerical characterization of material elastic properties for random fiber composites

Iorga

Pan

Pelegri

2008

JOMMS

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This paper presents a numerical investigation of the material elastic properties for short-length mostly in-plane random fiber composites, based on microscale geometrical modeling. The particular case considered is that of materials in which the majority of fibers' orientations are contained or slightly deviate from a dominant plane. Representative volume elements for two types of random fiber composite material geometries with different fiber aspect ratios and volume fractions are generated using a novel technique. The elastic properties of the equivalent homogeneous material are determined using direct three-dimensional finite element analysis. A windowing-type analysis is employed to investigate the influence of the fiber distribution homogeneity on the homogenized elastic properties. The results are compared and validated using two alternative approaches -first, by orientation averaging of the stiffness tensor of the equivalent unidirectional composite determined by direct FEM analysis and, second, by employing the laminated random strand method.

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Section: Validation Approachesmentioning

confidence: 99%

Section: Automated Fem Analysismentioning

confidence: 99%

Section: Validation Approachesmentioning

confidence: 99%

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Numerical characterization of material elastic properties for random fiber composites

Iorga

Pan

Pelegri

2008

JOMMS

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“…This is the reason why some numerical methods have been also proposed to obtain approximate solutions [7,4]. In particular, the finite element method has been considered to study composites with arbitrarily distributed or well oriented fibers [8,12,13]. For instance, in the work of Radtke et al [12], a partition of unity finite element method has been developed to estimate elastic properties of thin fibers reinforced composites.…”

Section: Introductionmentioning

confidence: 98%

A nonlinear finite element formulation for large deflection analysis of 2D composite structures

Tiar

Zouari

Kébir

et al. 2016

Composite Structures

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“…These are due to their excellent strength to weight ratio, resistance to corrosion, ease of fabrication into esthetically rounded and aerodynamic curvatures, excellent damping properties and impact energy absorption qualities. The polymer matrixes are exceptionally complex materials whose mechanical properties depend on chemistry; processing and thermomechanical history . During their manufacture, the temperature has to be right to achieve a quality product.…”

Section: Introductionmentioning

confidence: 99%

Effects of cure‐hold‐temperature and step‐wise cool‐down path on the service strength of fiber‐mat reinforced composites

et al. 2017

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The study considered the influence of the cure hold temperature and the techniques applied in cooling to room temperature on the strength of random fiber reinforced thermoset composites. Tensile and Charpy impact tests were carried‐out on chopped strand mat E‐glass fiber reinforced‐polyester composites cured at temperatures ranging between 30°C and 150°C and subsequently cooled through different paths. The composites contained 3 plies for the tensile test specimens, and 10 plies for the Charpy impact test specimens. The matrix was prepared from the same bulk and formulation. From the tests, samples oven cured at 85°C/3 hr and cooled under natural convection cool‐down path were found to give the highest tensile strength of 96 MPa while the laminate cured at 30°C room temperature produced the lowest strength of 69 MPa. Also, samples cured at 85°C under natural convection cooling gave an average impact strength value of 550 kJ/m2, which is second to fridge cooled samples of 650 kJ/m2 average value. There is therefore need for oven‐cure followed by quenching to obtain maximum strength in polyester laminate applications. POLYM. COMPOS., 39:3935–3943, 2018. © 2017 Society of Plastics Engineers

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On the mechanical response of randomly reinforced chopped-fibers composites: Data and model

Cited by 49 publications

References 4 publications

Numerical characterization of material elastic properties for random fiber composites

Numerical characterization of material elastic properties for random fiber composites

A nonlinear finite element formulation for large deflection analysis of 2D composite structures

Effects of cure‐hold‐temperature and step‐wise cool‐down path on the service strength of fiber‐mat reinforced composites

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