Estimation of Lamina Stiffness and Strength of Quadriaxial Non-Crimp Fabric Composites Based on Semi-Laminar Considerations

Cao, Yingbin; Yang, Feng; Wang, Wenzhi; Danqing, Wu; Zhu, Zhengzheng

doi:10.3390/app6090267

Cited by 5 publications

(4 citation statements)

References 28 publications

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“…Even if the term non-crimped fabrics (NCFs) [117][118][119] refers to semi-finished fiber products that do not contain any fiber misalignment, they usually contain small level in-plane fiber waviness due to stitches or binder yarns. This is an inherent feature of the material similar to undulations in woven fabrics.…”

Section: Stitches In Non-crimped Fabricsmentioning

confidence: 99%

“…This is an inherent feature of the material similar to undulations in woven fabrics. Amongst many other studies, Cao et al [118] numerically studied the effect of in-plane fiber distortions in quadriaxial non-crimped fabrics (QNCF) induced by the stitching yarn on the mechanical properties using meso-scale finite element simulations. The effects of in-plane fiber distortions on the longitudinal elastic modulus were found to be insignificant.…”

Section: Stitches In Non-crimped Fabricsmentioning

confidence: 99%

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Mechanisms of Origin and Classification of Out-of-Plane Fiber Waviness in Composite Materials—A Review

2020

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Out-of-plane fiber waviness, also referred to as wrinkling, is considered one of the most significant effects that occur in composite materials. It significantly affects mechanical properties, such as stiffness, strength and fatigue and; therefore, dramatically reduces the load-carrying capacity of the material. Fiber waviness is inherent to various manufacturing processes of fiber-reinforced composite parts. They cannot be completely avoided and thus have to be tolerated and considered as an integral part of the structure. Because of this influenceable but in many cases unavoidable nature of fiber waviness, it might be more appropriate to consider fiber waviness as effects or features rather than defects. Hence, it is important to understand the impact of different process parameters on the formation of fiber waviness in order to reduce or, in the best case, completely avoid them as early as possible in the product and process development phases. Mostly depending on the chosen geometry of the part and the specific manufacturing process used, different types of fiber waviness result. In this study, various types of waviness are investigated and a classification scheme is developed for categorization purposes. Numerous mechanisms of wrinkling were analyzed, leading to several recommendations to prevent wrinkle formation, not only during composite processing, but also at an earlier design stage, where generally several influence factors are defined.

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Section: Stitches In Non-crimped Fabricsmentioning

confidence: 99%

Section: Stitches In Non-crimped Fabricsmentioning

confidence: 99%

Mechanisms of Origin and Classification of Out-of-Plane Fiber Waviness in Composite Materials—A Review

2020

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“…Cao et al. 14 investigated the effect of in-plane fiber misorientation on the mechanical properties of a quadriaxial non-crimp fabric composite using a multiscale modelling frame work. A small decrease in the longitudinal stiffness, while a significant decrease in the longitudinal strength due to fiber misorientation was reported.…”

Section: Introductionmentioning

confidence: 99%

A multiscale framework for predicting the mechanical properties of unidirectional non-crimp fabric composites with manufacturing induced defects

Rouf

Worswick

Montesano

2020

Journal of Composite Materials

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The aim of this study was to evaluate the effect of manufacturing induced in-plane tow misalignment and out-of-plane tow crimp on the mechanical properties of a heavy-tow unidirectional non-crimp fabric (UD-NCF) composite. The elastic constants and failure onset (strength) are predicted by employing a multiscale computational approach. Micro-scale finite element (FE) models that explicitly represent the fibers and matrix within the tow microstructure were used to predict the effective properties of the tow. Meso-scale FE models comprised of the homogenized tows and surrounding matrix were used to predict the properties of a UD NCF composite lamina. Four meso-scale models, identified as ideal, crimp, misalignment and real, were considered in this study. No manufacturing defects were represented in the ideal model, while out-of-plane crimp, in-plane misalignment and both out-of-plane crimp and in-plane misalignment were accounted for in the crimp model, misalignment model and real model, respectively. Predicted lamina stiffness based on the real model are found to be in an excellent agreement with available experimental data, which was not always the case for the other three models. The longitudinal and transverse strength predictions are found to be dependent on the chosen local failure criteria for each model. Max-stress and Puck’s fiber failure criteria provide an excellent estimate of longitudinal strength while the Puck’s inter-fiber failure and Tsai-Hill criteria predict transverse strength with good accuracy. The feasibility to accurately predict the mechanical properties of heavy tow non-crimp fabric composites by incorporating their inherent micro-structural defects is demonstrated in this study.

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“…With the rapid development of modern industrial technology, particle-reinforced metal matrix composites, which combine the ductility and toughness of metal phase with the high strength of the reinforced particles, have been widely used due to their high specific strength and high specific rigidity [1][2][3][4]. As is well known, the mechanical behaviors of composites with complex microstructures are closely dependent on many factors, such as inclusion volume fraction, inclusion shapes, etc.…”

Section: Introductionmentioning

confidence: 99%

The Interphase Influences on the Particle-Reinforced Composites with Periodic Particle Configuration

Chu

Zhai

et al. 2017

Applied Sciences

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This work improved upon an effective micromechanical method to analyze the mechanical properties of three-dimensional particle-reinforced composites (PRC) with consideration of the interfacial debonding. By incorporating the interfacial debonding model, Mises yield criterion, and failure theory, the effects of particle shape, particle volume fraction, and loading condition on the mechanical properties are studied. A comparison of simulation results obtained from the established method and published experimental data is presented. Good consistency can be found in this study. On this basis, the interfacial cohesive strength and particle shape effects on the biaxial failure strength of particle-reinforced composites with interfacial debonding were also studied. The results revealed that both interfacial strength and particle shape have significant effects on biaxial tensile failure strength. However, the different interfacial strength influence on failure envelope can hardly be discerned in biaxial compressive loading.

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Estimation of Lamina Stiffness and Strength of Quadriaxial Non-Crimp Fabric Composites Based on Semi-Laminar Considerations

Cited by 5 publications

References 28 publications

Mechanisms of Origin and Classification of Out-of-Plane Fiber Waviness in Composite Materials—A Review

Mechanisms of Origin and Classification of Out-of-Plane Fiber Waviness in Composite Materials—A Review

A multiscale framework for predicting the mechanical properties of unidirectional non-crimp fabric composites with manufacturing induced defects

The Interphase Influences on the Particle-Reinforced Composites with Periodic Particle Configuration

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