Development of CFRE composite scarf adhesive joints with SiC and Al2O3 nanoparticle

Self Cite

In this work, Epocast 50-A1/946 epoxy have been modified with different weight percentages (0.25, 0.5, 0.75, 0.1, 1.25, and 1.5 wt%) of multiwalled carbon nanotubes (MWCNTs). Because of Epocast epoxy was primarily developed for joining and repairing of composite aircraft structural components, the optimum weight percentage of MWCNTs must be determined based on trade-offs between the optimum tensile, inplane shear and toughness properties of the developed MWCNTs-composites, which is the objective of this study. The effect of MWCNTs on the toughness and inplane shear was studied using single-edge notch tension and Iosipescu shear tests, respectively. The experimental results showed that the composite materials with 0.75 wt% MWCNTs has the highest improvement in the in-plane shear properties compared to the neat epoxy. While the maximum improvements in the tensile and toughness properties were observed at 0.5 wt% MWCNTs. Eleven models were selected from an extensive literature survey, for predicting the in-plane shear moduli of the developed MWCNTs-composites. The modified rule of mixture can effectively predict the in-plane shear moduli of the composites with MWCNTs up to 0.75 wt%. While the nonlinear behavior of the modified Halpin-Tsai model with exponential shape function is the closest to the experimental results up to 1.5 wt% MWCNTs. POLYM. COMPOS., 00:000-000, 2016.

Section: Methodsmentioning

confidence: 99%

“…Khashaba et al [1,3] attributed this result to the higher s sn /r n ratio (5 11.4), which was calculated at 58 scarf angle (h) from the following equation:…”

Section: Introductionmentioning

confidence: 99%

“… Coordinate system of SAJ: s‐n is the adhesive coordinate system and x‐y is the joint coordinate system . [Color figure can be viewed at http://wileyonlinelibrary.com.…”

Section: Introductionmentioning

confidence: 99%

\frac{σ_{n}}{τ_{s n}} = \tan θ

…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improvement of toughness and shear properties of multiwalled carbon nanotubes/epoxy composites

Khashaba

2016

Self Cite

“…And the hygrothermal failure modes were all adhesive failure. Recent investigations carried out by Khashaba et al utilized nanoparticles and carbon nanotubes modified epoxide adhesive materials in scarf joints, which showed significant improvement in strength compared to neat epoxide adhesive. Likewise, a marginal decrease in joint strength after humidity condition was obtained, but sharp drop appeared when the test temperature was above 50°C.…”

Section: Introductionmentioning

confidence: 99%

Hygrothermal effects on mechanical behavior of scarf repaired carbon‐epoxy laminates subject to axial compression loads: Experiment and numerical simulation

Cheng

Zhang

et al. 2016

Experimental and numerical study are carried out to investigate hygrothermal effects on the mechanical behavior and damage propagation of scarf repaired carbon fiber reinforced plastic (CFRP) laminates. Experimental tests were carried out under four environment conditions: room temperature/dry, room temperature/ wet, elevated temperature (958C)/dry and elevated temperature (958C)/wet. Results showed no decrease in compression strength after moisture absorption, whereas the reduction under elevated temperature were 15.5% and 17.2% for dry and wet specimens, respectively. Furthermore, a finite element model was developed to simulate the failure process and predict structural strength, in which moisture diffusion, hygrothermal stress analysis and progressive damage model were considered. Good agreement was achieved between the predicted compression strength and experimental results. It is revealed that the damage in the adhesive initiates adjacent to 08 plies and propagates in circumferential direction. Water absorption causes initial damage in the edge of the adhesive layer, while it does not reduce the compression strength. And elevated temperature leads to earlier damage in adhesive. After large part of the adhesive layer damaged, damages in parent laminate occur and propagate transversely to the free edge sides until the final structural collapse, which is similar with the experimental phenomenon. POLYM. COM-POS., 39:904-914,

Advances in nanomaterials as exceptional fillers to reinforce carbon fiber‐reinforced polymers composites and their emerging applications

Luo,

Shi,

Qiao

et al. 2024

Carbon fiber reinforced polymer (CFRP) composites exhibit excellent characteristics such as light weight, high specific strength, specific stiffness, and chemical stability, making them customizable to meet the specific demands of various sectors such as the automotive, aerospace, defense, biomedical, and energy industries. However, the inert surface of carbon fibers (CFs) results in a poor interface compatibility with polymer matrices, leading to numerous interfacial defects and pores in prepared CFRP composites. These drawbacks significantly limit the application of CFRP composites in high‐end fields. The higher surface area and smaller size of nanomaterials provide multiple advantages for high‐performance CFRP composites that enhance the mechanical properties, impact resistance and interface adhesion between the fiber and the matrix. Hence, this review firstly summarizes the interfacial behavior and interface enhancement mechanisms for CFRP composites. Subsequently, we comprehensively review the recent advances in various nanomaterials‐modified CFRP composites, including carbon‐based nanoparticles, silicon‐based nanomaterials and metal nanomaterials, et al. Besides, we also present the applications of CFRP in emerging fields, such as military, aerospace, automotive, sports equipment, and medical, etc. Finally, we also prospected the challenges and future development trends of CFRP composites, aiming to provide new ideas and insights for future research on nanomaterial modifications and promote the development of high‐performance CFRP composites.Highlights The interface reinforced theory of CFRP is comprehensively summarized. Different types of nanoparticles that can be used for reinforcement in CFRP composites and nanomaterials modification methods are reviewed. Application of CFRP composites in various fields is presented. Challenges and future development directions of preparation of high‐performance CFRP composites are proposed.