An Experimental Study on the Low Velocity Impact Behavior of Hybrid Epoxy Composites

Bunea, Marina; Birsan, Iulian Gabriel; Cîrciumaru, Adrian

doi:10.37358/mp.20.2.5364

Cited by 2 publications

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…43,44 The interlaminar stresses are maximum between those layers with the greatest ply orientation angle difference, which creates large delamination among plies in this area. [45][46][47][48][49] Delamination causes the impactor to rebound. If the penetration appears, then the damaged area is the size of the impactor diameter.…”

Section: Impact Damage In Carbon Fiber-reinforced Compositesmentioning

confidence: 99%

Recovery of impact-damaged carbon fiber–reinforced composites using induction heating

Bayazeid

Poon²,

Subeshan

et al. 2021

Journal of Composite Materials

View full text Add to dashboard Cite

Carbon fiber–reinforced composites (CFRCs) have been used extensively in structural applications within the aerospace and automotive manufacturing industries. However, several other applications have been recognized. These take advantage of the additional properties of CFRCs, which lead to providing better performance for structures. However, in their service environment, these CFRCs are inevitably susceptible to impact damage from multiple sources, and they must be able to recover from impacts to meet structural requirements. This study directs an experimental investigation of using induction heating (IH) for an impact-damaged CFRC. Here, IH process parameters, including the effects of electromagnetic frequency and generator power on the recovery of impact-damaged CFRC, have been analyzed. The anisotropic conductivity characteristics and the relationship between the drop-weight impact depth and conductivity of CFRC garnered much attention. This paper also offers the electromagnetic properties of CFRC for various applications. In this study, CFRC cured samples were obtained from Cetex® TC1200 PEEK, AS4 145 gsm, 16 unidirectional plies. Three variants of CFRC samples were tested: undamaged samples; samples with impact damage introduced in the center by a drop-weight impact test, according to the ASTM D7136/7136M standard; and samples with drop-weight impact damage recovered using the IH system. This work presents the results of the tensile strength of CFRC samples to assess the comparison of undamaged samples, samples damaged after the drop-weight impact test, and samples recovered after the drop-weight impact test. IH is appropriate for the recovery of impact-damaged CFRC samples, aiding in the conversion of electromagnetic energy to heat in order to generate mechanisms on components to recover the impact-damaged CFRC samples. Experimental results show that the impact-damaged area of the recovered CFRC samples is 37.0% less than that of damaged CFRC samples, and tensile strength results also improved after the impact-damaged CFRC samples were recovered. These results show that the IH method can effectively improve the impact damage performance of CFRC. The outcome of this study is promising for use in many applications, especially in the aerospace and automotive industries.

show abstract

Section: Impact Damage In Carbon Fiber-reinforced Compositesmentioning

confidence: 99%

Recovery of impact-damaged carbon fiber–reinforced composites using induction heating

Bayazeid

Poon²,

Subeshan

et al. 2021

Journal of Composite Materials

View full text Add to dashboard Cite

show abstract

Damage Mechanisms and Mechanical Behavior of Epoxy Composites after Low Velocity Impact

Bunea

2024

Composite Materials - Science and Engineering [Working Title]

View full text Add to dashboard Cite

This study provides a comprehensive review of existing research on the low velocity impact response, post-impact mechanical strength, and damage mechanisms of epoxy hybrid composites reinforced with fibers or fabrics. It focuses on the investigation of the influence of various factors on the impact damage mechanisms, such as matrix cracking, delamination, fiber breakage, and fiber pullout, which significantly reduce the residual mechanical properties of these composites. Herein, it is discussed the ways of optimizing impact response, post-impact mechanical properties, and resistance to damage by hybridization, incorporation of fillers into epoxy matrix, and insertion of metal wires between certain layers. This study reveals that the impact energy level, impact angle, impactor size, and shape significantly affect damage severity and energy absorption. The hybrid composites with specific fiber combinations and ply orientations can enhance impact resistance and post-impact mechanical strength. The combination of different fibers can offer tailored properties and improved impact behavior compared to pure fabric composites. By adding fillers to epoxy matrix and metal wires between certain plies, it can reduce residual deformations and damage degree. The natural fiber-reinforced epoxy composites exhibit high impact strength due to their fiber structure and can be a sustainable alternative to synthetic fibers.

show abstract

An Experimental Study on the Low Velocity Impact Behavior of Hybrid Epoxy Composites

Cited by 2 publications

References 36 publications

Recovery of impact-damaged carbon fiber–reinforced composites using induction heating

Recovery of impact-damaged carbon fiber–reinforced composites using induction heating

Damage Mechanisms and Mechanical Behavior of Epoxy Composites after Low Velocity Impact

Contact Info

Product

Resources

About