Delamination properties of translaminar-reinforced composites

Tamužs, Vitauts; Tarasovs, S.; Vilks, U. K.

doi:10.1016/s0266-3538(03)00042-3

Cited by 68 publications

(45 citation statements)

References 6 publications

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“…In addition, modified beam theory (MBT) assumes that C 1/3 is a linear function of crack length, but this is only true in the case when fracture toughness has a constant value during crack propagation. In the case of large scale bridging, the experimental points form a curved line, and therefore linear fitting procedures cannot be used to find the correction [6,18]. Nonlinear fracture mechanics would be a better approach to evaluate fracture parameters in DCB [44].…”

Section: Finite Element Validationmentioning

confidence: 99%

“…Nevertheless, the FE model provides insight to explain the observed effect of MWCNTs on interlaminar fracture of CFRP. LEFM is utilized to calculate fracture toughness in this investigation following ASTM D5528 standards and others [3,6,13,14,34] to compare between different specimens and study the effect of COOH-MWCNTs on the delamination growth. Comparisons between the experimental and numerical results for the delamination growth vs. load (Figure 19a,b) and delamination growth vs. displacement (Figure 19c,d) for the neat and 0.5 wt% MWCNTs specimens have been made.…”

Section: Finite Element Validationmentioning

confidence: 99%

“…Delamination between composite layers is often initiated by imperfections introduced during the layup fabrication process. Micro-crack propagation then follows in regions of relatively high void content under conditions of transverse loading, impact stresses, fatigue, or various environmental factors [3,6]. Many studies have successfully quantified the relatively low fracture toughness of laminated composites.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have successfully quantified the relatively low fracture toughness of laminated composites. For example, Tamuzs et al reported that the critical energy release rate of laminate composites does not commonly exceed 0.2-0.4 kJ/m 2 [6]. For the past several decades, the improvement of interlaminar fracture toughness in composites with brittle matrices has been a critical area of research and investigation.…”

Section: Introductionmentioning

confidence: 99%

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Interlaminar Fracture Toughness of CFRP Laminates Incorporating Multi-Walled Carbon Nanotubes

et al. 2015

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Carbon fiber reinforced polymer (CFRP) laminates exhibit limited fracture toughness due to characteristic interlaminar fiber-matrix cracking and delamination. In this article, we demonstrate that the fracture toughness of CFRP laminates can be improved by the addition of multi-walled carbon nanotubes (MWCNTs). Experimental investigations and numerical modeling were performed to determine the effects of using MWCNTs in CFRP laminates. The CFRP specimens were produced using an epoxy nanocomposite matrix reinforced with carboxyl functionalized multi-walled carbon nanotubes (COOH-MWCNTs). Four MWCNTs contents of 0.0%, 0.5%, 1.0%, and 1.5% per weight of the epoxy resin/hardener mixture were examined. Double cantilever beam (DCB) tests were performed to determine the mode I interlaminar fracture toughness of the unidirectional CFRP composites. This composite material property was quantified using the critical energy release rate, GIC. The experimental results show a 25%, 20%, and 17% increase in the maximum interlaminar fracture toughness of the CFRP composites with the addition of 0.5, 1.0, and 1.5 wt% MWCNTs, respectively. Microstructural investigations using Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) verify that chemical reactions took place between the COOH-MWCNTs and the epoxy resin, supporting the improvements experimentally observed in the interlaminar fracture toughness

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Section: Finite Element Validationmentioning

confidence: 99%

Section: Finite Element Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interlaminar Fracture Toughness of CFRP Laminates Incorporating Multi-Walled Carbon Nanotubes

et al. 2015

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“…Reported values for mode I delamination toughness vary widely depending on the stitch density and architecture. A typical 2D-woven carbon-fibre epoxy composite would be expected to have a propagation G IC of approximately 600-800 J/m 2 [16,17] whilst 3D woven composites have reported to have propagation G IC from approximately 1400-6400 J/m 2 [16,18,19].…”

Section: Introductionmentioning

confidence: 99%