A constitutive model for 3D printed continuous fiber reinforced composite structures with variable fiber content

Hou, Zhanghao; Tian, Xiaoyong; Zheng, Ziqi; Zhang, Junkang; Zhe, LU; Li, Dichen; Malakhov, Andrei V.; Полилов, А. Н.

doi:10.1016/j.compositesb.2020.107893

Cited by 107 publications

(33 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Micromechanics models have been used to predict mechanical properties of 3D-printed composite parts. 22,23 A summary of the mechanical properties of 3D-printed fiber-reinforced polymers can be found in Brenken et al 24 Properties of composite materials are highly function of fiber volume fractions. 25,26 While longitudinal properties of 3D-printed composites for a specific fiber volume fraction have been studied, a comprehensive testing of 3D-printed continuous fiber composites for a wide range of fiber volume fractions with different fiber orientations has not been conducted.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluating the effect of variable fiber content on mechanical properties of additively manufactured continuous carbon fiber composites

Hetrick

Sanei

Bakis

et al. 2020

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

Fiber volume fraction is a driving factor in mechanical properties of composites. Micromechanical models are typically used to predict the effective properties of composites with different fiber volume fractions. Since the microstructure of 3D-printed composites is intrinsically different than conventional composites, such predictions need to be evaluated for 3D-printed composites. This investigation evaluates the ability of the Voigt, Reuss, and Halpin–Tsai models to capture the dependence of modulus and strength of 3D-printed composites on varying fiber volume fraction. Tensile coupons were printed with continuous carbon fiber-reinforced Onyx matrix using a Markforged Mark Two printer. Specimens were printed at five different volume fractions with unidirectional fibers oriented at either [Formula: see text] to obtain longitudinal, shear, and transverse properties, respectively. It is shown that the Voigt model provides an excellent fit for the longitudinal tensile strength and a reasonable fit for the longitudinal modulus with varied fiber content. For the transverse direction, while the Reuss model fails to capture the transverse modulus trend, the Halpin–Tsai model provides a reasonable fit as it incorporates more experimental parameters. Like conventional composites, addition of fibers degrades the transverse strength, and the transverse strength decreases with increasing fiber volume fraction. The shear modulus variation with fiber content could not be fitted reasonably with either Halpin–Tsai model or Reuss model.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluating the effect of variable fiber content on mechanical properties of additively manufactured continuous carbon fiber composites

Hetrick

Sanei

Bakis

et al. 2020

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

show abstract

“…Compared with short Kevlar fiber, fiber content can be further improved with continuous Kevlar fiber, meanwhile, the position and orientation of fibers can be controlled through precise design of printing path 15 . Hou et al 16 investigated the effects of fiber content on stiffness and strength of 3D‐printed continuous Kevlar fiber‐reinforced composites, both these two properties increased with the increase of fiber content. The effects of print parameters such as fiber laying pattern, fiber diameter, and layer height on tensile and bending properties of Kevlar fiber‐reinforced composites were explored by Akhoundi et al, 17 fiber laying pattern plays an essential role in mechanical property and rectangular arrangement of continuous fiber is the optimal choice.…”

Section: Introductionmentioning

confidence: 99%

Features of acoustic emission and micro‐CT of 3D‐printed continuous Kevlar fiber‐reinforced composites during progressive damage under flexural load

Liu

Wang

Song

et al. 2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

Failure mechanism and its characterization methods of 3D‐printed fiber‐reinforced composites are still needed thorough investigation. In this work, typical 3D‐printed composites reinforced with 10% and 20% continuous Kevlar fiber are prepared, respectively, three point bending progressive damage experiments are carried out, and the damage evolution are real‐time monitored by acoustic emission (AE) technology. When load reaches the maximum value and failure point, microcomputed tomography (micro‐CT) observations are performed for loaded specimens to explore inside damages. Results show that bending strength of Specimen B (20% fiber) increases by 23% relative to Specimen A (10% fiber). Cumulative count and energy of AE signals are higher for Specimen B, and K‐means clustering algorithm is employed for deep analysis of AE signals. Three damage modes including matrix crack, fiber/matrix debonding, and fiber fracture are clustered and validated by micro‐CT, indicating that the combination of AE and micro‐CT is effective for the characterization of damage evolution of composites. Debonding due to poor adhesion between fiber and matrix is the main damage mode of 3D‐printed Kevlar fiber‐reinforced composites, and damages of Specimen B concentrated in the later stage. This work provides failure characterization methods for 3D‐printed fiber‐reinforced composites.

show abstract

“…Continuous fiber reinforced thermoplastic (CFRT) composites have attracted more and more attention from automotive and aerospace industries due to their unique advantages such as light weight , high strength, good impact resistance, short molding cycle and recyclability [1][2][3][4]. The forming methods of CFRT composites mainly include hot press molding [5], pultrusion [6], resin transfer molding [7], out-of-autoclave consolidation [8].…”

Section: Introductionmentioning

confidence: 99%

Research on the fabrication of continuous carbon fiber reinforced polyamide 6 composites by means of ultrasonic vibration

Liu

Zhai²,

Li³

et al. 2022

Preprint

View full text Add to dashboard Cite

Because of the high viscosity and poor fluidity of thermoplastic resin, it is easy to form void in thermoplastic composites fabricated by traditional methods. The introduction of ultrasonic vibration into the fabrication of thermoplastic composites promotes the flow of thermoplastic resin and improve the quality of thermoplastic composites. In this study, continuous carbon fiber reinforced polyamide 6 (CF/PA 6) composites were fabricated by ultrasonic vibration. The effects of ultrasonic amplitude and welding time on the temperature variations of the CF/PA 6 stack during the fabrication process were firstly studied. Meanwhile, the process of impregnation evolution was observed. Then, the quality of CF/PA 6 composites with different ultrasonic vibration parameters were evaluated from the aspects of carbon fiber (CF) fabric structure, carbon fiber diameter, void content, fiber volume fraction, and the flexural strength. The results show that increasing the ultrasonic amplitude and welding time can increase the fiber volume fraction and decrease the void content of CF/PA 6 composites. However, increasing ultrasonic amplitude and welding time result in a smaller carbon fiber diameter and worse CF-PA 6 interface properties. The CF fabric structure is sensitive to ultrasonic vibration parameters. Ultrasonic amplitude and welding time exceeding a certain threshold reduce the flexural strength of CF/PA 6 composites. The flexural strength of the composites is improved by increasing the ultrasonic amplitude and welding time within a limited window. Different from flexural strength, the flexural modulus of the composite increases with the increase of ultrasonic amplitude and welding time due to more compact CF fabrics in the composite laminates. In addition, the failure mode of composites is sensitive to the ultrasonic vibration parameters.

show abstract

A constitutive model for 3D printed continuous fiber reinforced composite structures with variable fiber content

Cited by 107 publications

References 32 publications

Evaluating the effect of variable fiber content on mechanical properties of additively manufactured continuous carbon fiber composites

Evaluating the effect of variable fiber content on mechanical properties of additively manufactured continuous carbon fiber composites

Features of acoustic emission and micro‐CT of 3D‐printed continuous Kevlar fiber‐reinforced composites during progressive damage under flexural load

Research on the fabrication of continuous carbon fiber reinforced polyamide 6 composites by means of ultrasonic vibration

Contact Info

Product

Resources

About