Malagi, S.Anawal, R.Gorabal, S.V.Doddamani, M.2026-02-052019Journal of Mechanical Engineering Research and Developments, 2019, 42, 5, pp. 93-9610241752https://doi.org/10.26480/jmerd.05.2019.93.96https://idr.nitk.ac.in/handle/123456789/24788The present study focuses on flexural and quasi-static compression behavior of high-density polyethylene (HDPE)/walnut shell (WS) composites. Flexural and quasi-static compression specimens by 20, 40 and 60 wt. % of WS are synthesized by polymer injection (PI) molding. The flexural modulus and strength are observed to increase with increase in the wt.% of WS. Compared to pure HDPE, the flexural modulus and strength increased in the range of 205-403% and 49-58% respectively. Further quasi-static compression tests are carried at 0.001, 0.01, 0.1 s-1 strain rates. Compressive modulus of HDPE/WS specimens is lower as compared to pure HDPE samples for all the strain rates. Compressive yield strength of HDPE/WS specimens shows increasing trend with increase in the strain rates. Scanning electron microscopy (SEM) is employed to study the fractography of the samples. © 2019 Zibeline International Publishing Sdn. Bhd. All rights reserved.FlexuralHDPEPolymer injectionQuasi-static compressionWalnut shell