The Mechanical Peformance Of A Sustainable Hybrid Core Made From Corncob Waste/Polyurethane With Geogrid Reinforcement

Dicky Permana Adji  Santosa; Wijang Wisnu  Raharjo; Dody  Ariawan

doi:10.6180/jase.202512_28(12).0015

The Mechanical Peformance Of A Sustainable Hybrid Core Made From Corncob Waste/Polyurethane With Geogrid Reinforcement

Dicky Permana Adji Santosa¹, Wijang Wisnu Raharjo²This email address is being protected from spambots. You need JavaScript enabled to view it., and Dody Ariawan²

¹Graduate Student of Mechanical Engineering, Sebelas Maret University, Jl. Ir. Sutami 36A, Surakarta, Indonesia

²Mechanical Engineering Department, Sebelas Maret University, Jl. Ir. Sutami 36A, Surakarta 57126, Indonesia

Received: October 29, 2024
Accepted: February 25, 2025
Publication Date: April 23, 2025

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202512_28(12).0015

The core is a lightweight structure located between two thin and rigid layers in a sandwich composite. A slight addition to the core can enhance the stiffness and strength of the composite. To reduce weight, the core is produced in the form of foam, honeycomb, or wave structures. However, during loading, the applied force can cause cracks in the core. These cracks can propagate and lead to the failure of the sandwich structure. To address this issue, modifications to the core are necessary by adding reinforcement structures. A core with additional reinforcement structures is called a hybrid core. This study aims to investigate the improvement of the mechanical performance of sustainable cores by adding reinforcement structures. The added reinforcement consists of geogrids, with variations in the number of layers being 1, 2, and 3 layers. The test results showed that the core with three layers of geogrid achieved the highest bending strength, flatwise compression strength, and edgewise compression strength, with values of 1.03 MPa, 0.52 MPa, and 0.45 MPa, respectively. The results indicate an increase in strength with the addition of more geogrid layers. The hybrid core system with additional geogrid layers functions to stabilize the core against bending and compressive stress loads. The test results can be used as a reference for materials in the construction of earthquake-resistant walls.

Keywords: Hybrid Core; Polyurethane; Corn Cob; Geogrid, Mechanical Performance

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