Predicting variability in transverse effective elastic moduli and failure initiation strengths in UD composite microstructures due to randomness in fiber location and morphology

Bhuiyan, Faisal H.; Sanei, Seyed Hamid Reza; Fertig, Ray S.

doi:10.1016/j.compstruct.2020.111887

Cited by 30 publications

(14 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The smallest RVE edge length used in this analysis is 312.5 µm, 22 times larger than the fiber radius. In accordance with the literature, this RVE size is large enough to represent the local mechanical properties [46]. The V f distributions show that there is a V f gradient through the cross-section, with increasing fiber content towards the center of the profile.…”

Section: Fiber Distribution Through the Cross-sectionsupporting

confidence: 84%

“…The mesoscale process modeling scheme developed in this study can also be used in a multiscale process modeling framework in future studies. The location dependent spatial fiber distribution can be implemented into advanced microscale methods to estimate the fiber distribution dependent thermal [53] and mechanical [46] properties which can be used in a multiscale process modeling scheme. Location dependent coupling between micromeso-macro levels in a multi-scale analysis would give valuable insight into pultruded profiles' structural limits.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Mesoscale Process Modeling of a Thick Pultruded Composite with Variability in Fiber Volume Fraction

et al. 2021

View full text Add to dashboard Cite

Pultruded fiber-reinforced polymer composites are susceptible to microstructural nonuniformity such as variability in fiber volume fraction (Vf), which can have a profound effect on process-induced residual stress. Until now, this effect of non-uniform Vf distribution has been hardly addressed in the process models. In the present study, we characterized the Vf distribution and accompanying nonuniformity in a unidirectional fiber-reinforced pultruded profile using optical light microscopy. The identified nonuniformity in Vf was subsequently implemented in a mesoscale thermal–chemical–mechanical process model, developed explicitly for the pultrusion process. In our process model, the constitutive material behavior was defined locally with respect to the corresponding fiber volume fraction value in different-sized representative volume elements. The effect of nonuniformity on the temperature and cure degree evolution, and residual stress was analyzed in depth. The results show that the nonuniformity in fiber volume fraction across the cross-section increased the absolute magnitude of the predicted residual stress, leading to a more scattered residual stress distribution. The observed Vf gradient promotes tensile residual stress at the core and compressive residual stress at the outer regions. Consequently, it is concluded that it is essential to take the effects of nonuniformity in fiber distribution into account for residual stress estimations, and the proposed numerical framework was found to be an efficient tool to study this aspect.

show abstract

Section: Fiber Distribution Through the Cross-sectionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Mesoscale Process Modeling of a Thick Pultruded Composite with Variability in Fiber Volume Fraction

et al. 2021

View full text Add to dashboard Cite

show abstract

“…A non-uniform V f also implies a different distribution of material properties, which is often neglected in modelling longitudinal tension. In contrast, the effect of local fibre volume fraction variability was shown to influence the failure behaviour in the transverse direction in unidirectional composites [4,21].…”

Section: Introductionmentioning

confidence: 86%

“…Unidirectional carbon fibre composites show their best performance when loaded in longitudinal tension. Nevertheless, due to the intrinsic complexity of the material, the material properties present a large variability [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Microscale material variability and its effect on longitudinal tensile failure of unidirectional carbon fibre composites

Malgioglio

Pimenta

Matveeva

et al. 2021

Composite Structures

View full text Add to dashboard Cite

“…The reliable application of composites depends on the accurate evaluation and prediction of their mechanical properties [ 5 , 6 ]. Numerous studies have used uniaxial tests to identify the properties of composites, contributing to a wider application of CFRP [ 4 , 7 , 8 , 9 , 10 , 11 , 12 ]. However, the uniaxial mechanical tests are limited in characterizing the real mechanical responses of composites under the complex loading state in engineering applications, for example, the filament wound pressure vessels (FWPV) [ 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Biaxial Properties of CFRP with the Novel-Designed Cruciform Specimens

Zhang

Zhu²,

et al. 2022

Materials

View full text Add to dashboard Cite

The biaxial loading properties of carbon-fiber-reinforced polymer (CFRP) are critical for evaluating the performance of composite structures under the complex stress state. There are currently no standardized specimens for the CFRP biaxial experiments. This work developed a new design criterion for the cruciform specimen coupled with the Hashin criterion. The finite element analysis was conducted to investigate the effect of geometric parameters on the stress distribution in the test area. The embedded continuous laying method (ECLM) was proposed to achieve the thinning of the center of the test region without introducing defects. The manufacturing quality of the cruciform specimens was verified by the ultrasonic C-scanning test. The biaxial test platform consisting of the biaxial loading system, digital image correlation (DIC) system, strain electrical measurement system, and acoustic emission detection system was constructed. The biaxial tensile tests under different biaxial loading ratios were conducted. The results showed that the biaxial failure efficiently occurred in the test area of the cruciform specimens designed and manufactured in this paper. The failure modes and morphology were characterized using macro/microscopic experimental techniques. The biaxial failure envelope was obtained. The results can be used to guide the design of composite structures under biaxial stress.

show abstract

Predicting variability in transverse effective elastic moduli and failure initiation strengths in UD composite microstructures due to randomness in fiber location and morphology

Cited by 30 publications

References 60 publications

Mesoscale Process Modeling of a Thick Pultruded Composite with Variability in Fiber Volume Fraction

Mesoscale Process Modeling of a Thick Pultruded Composite with Variability in Fiber Volume Fraction

Microscale material variability and its effect on longitudinal tensile failure of unidirectional carbon fibre composites

Investigation of Biaxial Properties of CFRP with the Novel-Designed Cruciform Specimens

Contact Info

Product

Resources

About