Development of Improved Flexural and Impact Performance of Kevlar/Carbon/Glass Fibers Reinforced Polymer Hybrid Composites

• Published in: Journal of composites science Vol. 6; no. 9; p. 245
• Main Authors: Rout, Sonali, Nayak, Ramesh Kumar, Patnaik, Suresh Chandra, Yazdani Nezhad, Hamed
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.09.2022
• Subjects: Aramid fiber reinforced plastics; Carbon fibers; carbon/glass/kevlar hybrid composites; Composite materials; Engineering; Fiber composites; Fiber reinforced polymers; flexural; Flexural strength; Fracture surfaces; FRP laminates; Glass fiber reinforced plastics; Hardness; Hybrid composites; Hybridization; Impact strength; Izod impact; Kevlar (trademark); Laminates; Mechanical properties; Polymer matrix composites; Polymers; stacking sequence; Stacking sequence (composite materials); Synergistic effect; India
• ISSN: 2504-477X; 2504-477X
• DOI: 10.3390/jcs6090245

The present investigation focuses on developing cost-effective Carbon/Glass/Kevlar fiber-reinforced polymer hybrid composite laminates for achieving its synergistic effect on flexural and impact performance. It investigates the effect of stacking sequence induced by the use of different fiber types (Kevlar = K, glass = G, and carbon = C) on the flexural and impact performance of the composites. Five hybrid composites (labelled as A = [G2K3G2], B = [KG2CG2K], C = [CKGCGKC], D = [CGKCKGC], E = [CK2CK2C]) and three plain (i.e., non-hybrid) composites (F = [K]7, G = [G]7, H = [C]7) have been fabricated through manual pre-preg lay-up manufacturing techniques. The flexural strength and modulus, hardness, and Izod impact strength have been evaluated for the fabricated composites and compared. The results showed that the D-type hybrid composite achieves the maximum positive hybrid effect as compared to other hybrid composites, possesses a hardness of 59 BHN, a flexural strength of 380 MPa, and modulus of 36 GPa, and impact strength of 80 KJ/m2. The fracture surfaces of the hybrid composite specimen have been analysed using scanning electron microscopy, and compared against the properties achieved for enabling correlations. Furthermore, the cost-efficiency of the hybridization in terms of flexural strength/cost, modulus/cost, and impact strength/cost ratio were evaluated for potential engineering and design applications.