Journal Published Online: 21 July 2023
Volume 51, Issue 6

Mechanical, Acoustical, and Morphological Characterization of Impact Damage on the Effect of Temperature in Hybrid Polymer Composites

CODEN: JTEVAB

Abstract

This work focuses on the investigation of impact damage resistance of basalt/epoxy, hemp/epoxy, and hybrid/epoxy composites under different temperatures of 30°C, 50°C, and 65°C. Unidirectional basalt and nonwoven hemp fibers were reinforced with LY556 epoxy resin using a hand layup technique. Mechanical, acoustical, and morphological analyses were performed to study the impact damage behaviors of composites. To start with, the specimens were subjected to a drop weight impact test with an impact velocity and incident energy of 1.5 m/s and 2.17 J, respectively. Subsequently, the three-point bending test was conducted on the impacted specimens with acoustic emission (AE) monitoring to evaluate the residual flexural strength and failure modes. The mechanical results showed that the hybrid/epoxy composites impacted at 50°C have better impact damage resistance attributed to low absorbed energy, deformation, residual dent, and higher residual strength. AE results showed that the matrix cracking failure modes were reduced with increasing temperature, whereas other failure modes were increased. Furthermore, the different damage mechanisms were correlated with the scanning electron microscopy images. The results provided evidence that the hybridization of natural fiber composites can be a suitable material for the application of impact loading at elevated temperatures.

Author Information

Chelliah, Suresh Kumar
Department of Aeronautical Engineering, Bharath Institute of Higher Education and Research, Chennai, Tamilnadu, India
Kannivel, Saravanakumar
Department of Aerospace Engineering, SRM Institute of Science & Technology, Chennai, Tamilnadu, India
Vellayaraj, Arumugam
Department of Aerospace Engineering, Madras Institute of Technology Campus, Chromepet, Anna University, Chennai, Tamilnadu, India
Pages: 15
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Details
Stock #: JTE20220581
ISSN: 0090-3973
DOI: 10.1520/JTE20220581