Fatigue behavior analysis and multi-scale modelling of chopped carbon fiber chip-reinforced composites under tension-tension loading condition

Tang, Haibin; Zhou, Guowei; Chen, Zhangxing; Huang, Liangliang; Avery, Katherine; Li, Yang; Liu, Haolong; Guo, Hao; Kang, Hong Tae; Zeng, Deliang; Engler-Pinto, Carlos; Su, Xuming

doi:10.1016/j.compstruct.2019.02.041

Cited by 29 publications

(8 citation statements)

References 31 publications

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“…The orientation of the tows proved significant in the determination of the different SN curves. However, it had no significant effect on the normalised SN curves, also considering the curve for a similar randomly oriented CF-SMC presented in [14,31].…”

Section: Contributions To the State Of The Artmentioning

confidence: 84%

“…They observed mainly tow debonding and inter-tow matrix cracking. In another study [31], Tang et al showed how matrix cracking inside or at the edge of the tows is the prevailing damage mechanism in the early stage of the cyclic loading. It was observed that tows oriented perpendicularly to the load direction tend to develop such cracks earlier.…”

Section: Introductionmentioning

confidence: 99%

“…Areas with lower local stiffness are therefore preferential failure site not just in static loading, but also in fatigue loading. Delamination was the main propagation mechanism in [31].…”

Section: Introductionmentioning

confidence: 99%

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Morphology-induced fatigue crack arresting in carbon fibre sheet moulding compounds

Martulli

Muyshondt

Kerschbaum

et al. 2020

International Journal of Fatigue

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Carbon Fibre Sheet Moulding Compounds (CF-SMCs) are tow-based composite materials. Interrupted fatigue tests, combined with computed tomography, were performed here to investigate the damage mechanisms in high in-mould flow CF-SMC.The tow-based microstructure created obstacles for fatigue damage propagation, increasing the CF-SMC's resistance against cyclic loading. Failure is shown to nucleate inside the tows, but inter-tow crack propagation tends to be hindered by the presence of the other tows. Tows oriented perpendicularly to the initial fatigue crack stop the crack itself, showing an intrinsic crack arrest mechanism. Additionally, pre-existing manufacturing cracks or voids do not propagate at all. As a result, flatter slopes of the SN diagrams were observed for CF-SMC than for other carbon or glass fibre composites with short, long and even continuous fibres.

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Section: Contributions To the State Of The Artmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Morphology-induced fatigue crack arresting in carbon fibre sheet moulding compounds

Martulli

Muyshondt

Kerschbaum

et al. 2020

International Journal of Fatigue

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“…2,3 For complex geometry components, such as those with rib-like features, thickness changes, and holes, discontinuous long fibres (DLF) composed of chopped strands of pre-impregnated composite tape have proven to be useful when compression moulded. 4,5 The success of this method has been demonstrated by several authors including van Wijngaarden, 6 Howell, 7 and Egu emann. 8 Demand for compression-moulded DLF composites is growing in the aerospace industry and manufacturers like Greene Tweed 9,10 have demonstrated its potential for commercial use.…”

Section: Introductionmentioning

confidence: 97%

Warpage investigation of carbon/PEEK discontinuous long fibre thin panels

Collins

Batista

Hubert

2021

Journal of Composite Materials

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Discontinuous Long Fibre (DLF) composites, composed of randomly-oriented strands of chopped unidirectional pre-impregnated tape, have been used in the aerospace industry to produce intricate, net-shape parts with complex features – replacing complicated metallic brackets with single, lightweight parts. Carbon/PEEK DLF composites suffer from warpage problems driven by several factors including their high processing temperatures and semi-crystalline matrix shrinkage. This work aims to characterize warpage of thin-gauge parts and pursue mitigation. Results showed that the magnitude of warpage reduces with decreasing strand size and increasing thickness. At thicknesses greater than 2 mm, warpage appeared relatively stable. The introduction of ribbed features was explored as a mean of mitigating warpage by increasing part stiffness. No significant impact on the magnitude of warpage was observed within parts. However, the addition of ribs helped to control the warped shape of the part.

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“…In line with the overarching goal of ICME to reduce the time and the cost in the discovery and development of novel CFRP composites structures, multi-scale computational models have been established and embraced in our previous work and those of other researchers [12][13][14][15][16][17][18][19][20][21][22][23][24]. A majority of those models deliver the concerned information embedded in equations and parameters from lower-scale simulations to higher-scale, which is termed as the bottom-up hierarchical approach [17].…”

Section: Introductionmentioning

confidence: 99%

An integrated computational materials engineering framework to analyze the failure behaviors of carbon fiber reinforced polymer composites for lightweight vehicle applications

Sun

Zhou

Meng

et al. 2021

Composites Science and Technology

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A bottom-up multi-scale modeling approach is used to develop an Integrated Computational Materials Engineering (ICME) framework for carbon fiber reinforced polymer (CFRP) composites, which has the potential to reduce development to deployment lead time for structural applications in lightweight vehicles. In this work, we develop and integrate computational models comprising of four size scales to fully describe and characterize three types of CFRP composites. In detail, the properties of the interphase region are determined by an analytical gradient model and molecular dynamics analysis at the nano-scale, which is then incorporated into micro-scale unidirectional (UD) representative volume element (RVE) models to characterize the failure strengths and envelopes of UD CFRP composites. Then, the results are leveraged to propose an elasto-plastic-damage constitutive law for UD composites to study the fiber tows of woven composites as well as the chips of sheet molding compound (SMC) composites. Subsequently, the failure mechanisms and failure strengths of woven and SMC composites are predicted by the meso-scale RVE models. Finally, building upon the models and results from lower scales, we show that a homogenized macro-scale model can capture the mechanical performance of a hat-sectionshaped part under four-point bending. Along with the model integration, we will also demonstrate that the computational results are in good agreement with experiments conducted at different scales. The present study illustrates the potential and significance of integrated multi-scale computational modeling tools that can virtually evaluate the performance of CFRP composites and provide design guidance for CFRP composites used in structural applications.

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Fatigue behavior analysis and multi-scale modelling of chopped carbon fiber chip-reinforced composites under tension-tension loading condition

Cited by 29 publications

References 31 publications

Morphology-induced fatigue crack arresting in carbon fibre sheet moulding compounds

Morphology-induced fatigue crack arresting in carbon fibre sheet moulding compounds

Warpage investigation of carbon/PEEK discontinuous long fibre thin panels

An integrated computational materials engineering framework to analyze the failure behaviors of carbon fiber reinforced polymer composites for lightweight vehicle applications

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