Quasi-static and dynamic characterization of unidirectional non-crimp carbon fiber fabric composites processed by HP-RTM

Cherniaev, Aleksandr; Zeng, Yu; Cronin, Duane S.; Montesano, John

doi:10.1016/j.polymertesting.2019.03.036

Cited by 15 publications

(8 citation statements)

References 21 publications

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“…Table 8 presents the predicted longitudinal tensile strengths based on failure onset, and experimentally measured tensile strength by Cherniaev et al. 43 For the ideal model, the longitudinal strengths predicted computationally using the Max-stress, Hashin-FF, and Puck FF criteria were similar in magnitude. However, the ideal model based predicted longitudinal strengths were found to be significantly higher than the experimental ones.…”

Section: Resultsmentioning

confidence: 88%

“…High pressure resin transfer molding (HP-RTM) was used to process the composite panels in a two-part mold using a constant temperature of 120 °C and a cure pressure of approximately 91 bar for 5 minutes (see Cherniaev et al. 43 for additional details). Each panel consisted of 7 aligned layers of the UD NCF.…”

Section: Development Of Finite Element Modelsmentioning

confidence: 99%

“…The matrix material properties (elastic modulus (E m ), tensile strength (X m ), and Poisson’s ratio ( ν m ) were experimentally measured by Cherniaev et al. 43 and are presented in Table 2.…”

Section: Development Of Finite Element Modelsmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 88%

Section: Development Of Finite Element Modelsmentioning

confidence: 99%

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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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“…Composite materials comprising heavy-tow non-crimp fabric (NCF) reinforcements are increasingly considered for use in primary load-bearing structures due to their excellent specific mechanical properties and relatively low cost when compared to other liquid composite molded materials reinforced with woven or braided fabrics. NCFs can be combined with a snap-cure resin to fabricate high-volume production automotive structural components with short cycle times [ 1 ]. Automotive structures experience loads under a range of quasi-static and dynamic loading conditions during service (typically <300 s −1 ); therefore, widespread adoption of NCF composites in automobiles requires a comprehensive understanding of their constitutive behavior at various strain rates [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Strain Rate on the Transverse Tension and Compression Behavior of a Unidirectional Non-Crimp Fabric Carbon Fiber/Snap-Cure Epoxy Composite

et al. 2021

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The strain rate-dependent behavior of a unidirectional non-crimp fabric (UD-NCF) carbon fiber/snap-cure epoxy composite loaded along the transverse direction under quasi-static and dynamic conditions was characterized. Transverse tension and compression tests at quasi-static and intermediate strain rates were performed using hydraulic testing machines, while a split Hopkinson pressure bar (SHPB) apparatus was used for transverse compression tests at high strain rates. A pulse shaper was used on the SHPB apparatus to ensure dynamic equilibrium was achieved and that the test specimens deformed homogenously with a nearly constant strain rate. The transverse tensile strength at a strain rate of 16 s−1 increased by 16% when compared to that at quasi-static strain rates, while distinct localized fracture surface morphology was observed for specimens tested at different strain rates. The transverse compressive yield stress and strength at a strain rate of 325 s−1 increased by 94% and 96%, respectively, when compared to those at quasi-static strain rates. The initial fracture plane orientation for the transverse compression tests was captured with high-speed cameras and found to increase with increasing strain rate. The study provides an important data set for the strain rate-dependent response of a UD-NCF composite material, while the qualitative fracture surface observations provide a deeper understanding of the failure characteristics.

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“…al. examined quasi-static properties and strain rate dependent mechanical responses of non-crimp fabric (NCF) composites manufactured using the HP-RTM process [26]. They observed a distinctive strain rate sensitivity of the NCF composite along the transverse direction.…”

Section: Introductionmentioning

confidence: 99%

CSAI analysis of non-crimp fabric cross-ply laminate manufactured through wet compression molding process

Hong

Choi

Kim

et al. 2021

Composite Structures

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The main purpose of the present work is to demonstrate mechanical performance of a wet-compressionmolding (WCM) composite product through conventional compressive-strength-after-impact (CSAI) analysis. Biaxial non-crimp fabric (NCF) is utilized to manufacture laminated composite panels. Specimens are cut from the panels and tested to characterize fundamental mechanical properties of the NCF composite. The volume fractions of fibers and voids are also measured to evaluate the quality of the WCM product. Impact tests are carried out to examine impact resistance of the composite structure. Numerous impact characteristics at various energy levels are quantitatively measured. Internal failure patterns and damage extent are revealed via Xray CT. Compression tests on the impacted plates are followed to evaluate structural integrity and damage tolerance (SIDT). 3D DIC technique is employed and distinct buckling responses dependent on impact energy levels are successfully visualized. Experimental results are showing a promising potential of the WCM process as one of the alternatives to the conventional autoclave-based fabrication method.

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Quasi-static and dynamic characterization of unidirectional non-crimp carbon fiber fabric composites processed by HP-RTM

Cited by 15 publications

References 21 publications

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

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

Effect of Strain Rate on the Transverse Tension and Compression Behavior of a Unidirectional Non-Crimp Fabric Carbon Fiber/Snap-Cure Epoxy Composite

CSAI analysis of non-crimp fabric cross-ply laminate manufactured through wet compression molding process

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