Prediction of tensile strength of discontinuous carbon fiber/polypropylene composite with fiber orientation distribution

Hashimoto, Masahiro; Okabe, Tomonaga; Sasayama, Toshiki; Matsutani, Hiroaki; Nishikawa, Masaaki

doi:10.1016/j.compositesa.2012.05.006

Cited by 74 publications

(48 citation statements)

References 14 publications

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“…Therefore, it is important to take into account the variability in the microstructure of RCs in order to predict their strength, especially when the dimensions of the reinforcing units are relatively large. This means that a deterministic equivalent laminate assumption might be suitable for DFCs based on small individually-dispersed fibres [20][21][22], but stochastic effects must be considered to predict the strength of TBDCs with large tows.…”

Section: Modelling Rcs Using the Equivalent Laminate Assumptionmentioning

confidence: 99%

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Experimental investigation of randomly-oriented tow-based discontinuous composites and their equivalent laminates

Pimenta

Singgih

et al. 2017

Composites Part A: Applied Science and Manufacturing

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The equivalent laminate assumption is a commonly-used method to model the random architecture of discontinuous composites, but which has never been validated experimentally. This study aims to verify the equivalent laminate assumption, focusing on tow-based discontinuous composites (TBDCs), which have higher fibre-content and thus improved modulus and strength, compared to conventional discontinuous-fibre composites. This verification was achieved by manufacturing and testing (i) actual TBDCs with randomly oriented tows and (ii) their equivalent laminates (ELs), at two different tow thicknesses. The results show that ELs exhibit the same failure mechanisms as TBDCs, and are similarly weakened by an increase in tow thickness. However, ELs lack the spatial variability in local fibre-content and local tow orientations, which makes ELs stronger than TBDCs. Therefore, the equivalent laminate assumption is suitable for predicting the modulus of discontinuous composites, but cannot predict their strength without considering the local variability in their microstructure.

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Section: Modelling Rcs Using the Equivalent Laminate Assumptionmentioning

confidence: 99%

“…Random TBDC Equivalent ply-by-ply laminate tows [2,[20][21][22][23]. The equivalent laminate assumption represents the random orientations of discontinuous composites into a ply-by-ply equivalent laminate, which contains unidirectional discontinuous plies at different orientations, usually forming a quasi-isotropic lay-up (see Figure 1).…”

Section: = ?mentioning

confidence: 99%

Experimental investigation of randomly-oriented tow-based discontinuous composites and their equivalent laminates

Pimenta

Singgih

et al. 2017

Composites Part A: Applied Science and Manufacturing

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show abstract

“…assuming perfect bonding for interface). To avoid computation instability, the maximum local damage value for fibre and matrix constituent was set to 0.9 [8].…”

Section: Damage Model Of Micro Constituentsmentioning

confidence: 99%

A Multi-Scale Approach to Predict the Impact Resistance of Braided Composites using Progress Failure

Hayat

2017

Advanced Composites Letters

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A novel multi-scale approach based on micromechanics of failure together with the progressive damage models of the fibre and matrix constituents is presented to predict the impact resistance of braided composites. The meso-and micro-scale unitcells of the braided composites with both thermosetting and thermos-plastic resin systems, were employed, and the effective properties of the braided tows, in the meso unit cell, were updated using the micro unit cell for which the degradation of constituent material properties were incorporated.

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“…GLS theory has also been extended to composites with discontinuous or damaged fibers [16,23] and applied with reasonable success to short-fiber PMCs [24,25] and MMCs [26,27]. Even randomly oriented discontinuous fibers can be treated within the GLS framework by using a "fiber orientation factor," measured from the composite modulus, to determine the appropriate effective fiber volume fraction in a unidirectional GLS model [24,25]. In all cases, the GLS model tacitly assumes that composite properties are "fiber-dominated" (which is the desirable regime of behavior), so the model would be inapplicable for matrix-dominated composites.…”

Section: Introductionmentioning

confidence: 99%

Rational design of fiber-reinforced hybrid composites: A global load sharing analysis

Rajan

2015

Composites Science and Technology

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Prediction of tensile strength of discontinuous carbon fiber/polypropylene composite with fiber orientation distribution

Cited by 74 publications

References 14 publications

Experimental investigation of randomly-oriented tow-based discontinuous composites and their equivalent laminates

Experimental investigation of randomly-oriented tow-based discontinuous composites and their equivalent laminates

A Multi-Scale Approach to Predict the Impact Resistance of Braided Composites using Progress Failure

Rational design of fiber-reinforced hybrid composites: A global load sharing analysis

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