Mechanical behavior of microcellular, natural fiber reinforced composites at various strain rates and temperatures

Kern, William T.; Kim, Wonsuk; Argento, A.; Lee, Ellen; Mielewski, Deborah F.

doi:10.1016/j.polymertesting.2014.05.008

Cited by 11 publications

(9 citation statements)

References 17 publications

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“…Voids tend to result in stress concentrations on their material surface at points furthest from the axis of the loading direction. The interaction of these effects produces a structure that previous experiments by the present authors have shown to be stiffer and more brittle than pure PP, but with very little change in ultimate tensile strength [32]. The addition of microcells reduces overall stress levels at all strains by redistributing microstructural stress fields.…”

Section: Introductionmentioning

confidence: 46%

“…Here, as shown in Fig. 8, the net stress-strain curves of the composites are determined from the FEA models and compared to experimental results in [32]. The FEA curves are well matched in general to the experiments in both solid ( Fig.…”

Section: Non-aligned-fiber Modelsmentioning

confidence: 70%

“…On the basis of available research [36][37][38][39] and SEM observations from the current study, the geometric parameters listed in Table 1 were used in the models. The fiber lengths of 167 and 333μm were selected from the typical short fiber specimens, and the 667 and 1000 μm lengths were determined from the typical long fiber specimens, manufactured and tested in [32]. loading test for characterization of the composites.…”

Section: Finite Element Modelingmentioning

confidence: 99%

“…Properties of natural fiber composites have received less study in this regard [1-3, 5, 16-22], and little research exists that investigates the microstructural behaviors of these composites [18,[23][24][25][26][27][28][29][30][31]. This is particularly true for the fiber in the current study, wheat straw [32], that is typically thicker and shorter than more-commonly used natural fibers such as jute. Microstructural voids added by gas-foaming in the mold [18, 23-25, 27, 28, 33, 34] offer a potential element of commercial value, but also add complexity in modeling.…”

Section: Introductionmentioning

confidence: 99%

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Finite element analysis and microscopy of natural fiber composites containing microcellular voids

et al. 2016

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Mechanical behaviors of chopped, natural fiber composites with and without closed-cell microcellular foamed structures are investigated using finite element analysis (FEA), with references to previously conducted experimental measurements of the stress-strain characteristics of analogous test specimens and their microscopic images. Analytical and FEA models are compared for a simple, aligned fiber case; the FEA models are then extended to composites having more general fiber arrangements. These FEA results are compared to experimental stressstrain data. Scanning electron microscopy (SEM) images of fracture surfaces from test specimens are analyzed, and correlations between numerically predicted behaviors and fracture paths, and fracture surface images are discussed. The FEA results reflect experimental trends well including the effects of fibers and the presence of voids. These have also been found to induce specific regions of stress concentration. Inspection of fracture surfaces reveals transition from ductile to brittle behavior at low strain rates, generally brittle failure modes, and little evidence of fibers stressed to their tensile limits.

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Section: Introductionmentioning

confidence: 46%

Section: Non-aligned-fiber Modelsmentioning

confidence: 70%

Section: Finite Element Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Finite element analysis and microscopy of natural fiber composites containing microcellular voids

et al. 2016

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“…at the Massachusetts Institute of Technology (MIT), and the microcellular foam material has been studied extensively for the past 20 years . Supercritical fluid foaming technology has been successfully used in microcellular thermoplastic foaming …”

Section: Introductionmentioning

confidence: 99%

Solid‐state microcellular high temperature vulcanized (HTV) silicone rubber foam with carbon dioxide

Yang

Song

et al. 2017

J of Applied Polymer Sci

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A series of microcellular high temperature vulcanized (HTV) silicone rubber foams were prepared using CO 2 as a physical blowing agent. Rheological properties, gas diffusive behavior, and foaming parameters of silicone rubber were investigated. The results show that saturation pressure has a significant effect on the diffusivity of CO 2 in HTV silicone rubber matrix. The gas concentration and diffusivity increase from 2.45 wt % to 3.24 wt %, and from 1.62 3 10 25 cm 2 /s to 7.83 3 10 25 cm 2 /s as the saturation pressure increases from 2 MPa to 5 MPa, respectively. The value of the gas diffusivity in HTV silicone rubber is almost 1000 times higher than that of the gas diffusivity in polyetherimide (PEI) matrix. Additionally, microcellular HTV silicone rubber foams with the smallest cell diameter of 9.8 lm and cell density exceeding 10 8 cells/cm 3 are achieved.

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Dynamic behavior of bio-based materials

Demarty,

Lefèbvre,

Notta-Cuvier

et al. 2024

Dynamic Behavior of Materials

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Mechanical behavior of microcellular, natural fiber reinforced composites at various strain rates and temperatures

Cited by 11 publications

References 17 publications

Finite element analysis and microscopy of natural fiber composites containing microcellular voids

Finite element analysis and microscopy of natural fiber composites containing microcellular voids

Solid‐state microcellular high temperature vulcanized (HTV) silicone rubber foam with carbon dioxide

Dynamic behavior of bio-based materials

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