The effect of lamina configuration and compaction pressure on mechanical properties of laminated gigantochloa apus composites

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.243993

Keywords:

laminated bamboo composites, gigantochloa apus, tensile strength, bending strength

Abstract

This study aims to investigate the mechanical properties of bamboo apus (gigantochloa apus) as a natural reinforced composite material. Bamboo’s laminates of gigantochloa apus were used as reinforcement on the epoxy resin matrix. The parameters examined in this study are the configuration of lamina and compaction pressure. Laminate configuration varies in the number, thickness and direction of the lamina. Compaction pressures of 1.5 MPa, 2 MPa, and 2.5 MPa were used to fabricate the Laminated Bamboo Composites (LBCs). The stem of bamboo with a length of 400 mm was split to obtain bamboo lamina with a size of 400×20 mm. The thickness of bamboo lamina is varied between 1 mm, 1.5 mm, and 2 mm. The bamboo lamina is then preserved by watering it with a preservative solution in the form of 2.5 % sodium tetraborate solution and dried in an oven until the water content reaches 10 %. LBCs were made with a hand lay-up method. After the LBCs were molded, they were pressed with 3 variations of dies compaction 1.5 MPa, 2 MPa and 2.5 MPa. The tensile and bending tests were carried out on the LBCs. Tensile testing is performed in accordance with ASTM standard D3039 and the bending tests were conducted based on ASTM standard D7264. The results show that at each compaction pressure, the highest tensile and bending strength was achieved by LBCs with a thickness of 1 mm of bamboo lamina and 7 layers of bamboo laminates. The LBC with thinner bamboo lamina reinforcement and more layers has the highest tensile strength and bending strength, even it has a lower mass fraction. The LBCs with laminates oriented 0° exhibited greater tensile and bending strengths than the LBCs with laminates structured –45°/+45° and 0°/90°. The LBCs with the 0° laminates direction is matrix fracture followed by lamina fracture. In the 0°/90° direction, matrix fracture is followed by delamination in the 90° and 0° laminates direction. Delamination and lamina clefting were observed in LBCs with laminates oriented +45°/–45°.

Supporting Agency

  • The authors acknowledge the Diponegoro University for the doctoral scholarship funding and their support of this research.

Author Biographies

Parlindungan Manik, Diponegoro University

Master of Engineering

Department of Mecahical Engineering

Agus Suprihanto, Diponegoro University

Doctor of Engineering

Department of Mechanical Engineering

Sri Nugroho, Diponegoro University

Doctor of Philosophy (PhD)

Department of Mechanical Engineering

Sulardjaka Sulardjaka, Diponegoro University

Doctor of Engineering

Department of Mechanical Engineering

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Published

2021-12-22

How to Cite

Manik, P., Suprihanto, A., Nugroho, S., & Sulardjaka, S. (2021). The effect of lamina configuration and compaction pressure on mechanical properties of laminated gigantochloa apus composites . Eastern-European Journal of Enterprise Technologies, 6(12 (114), 62–73. https://doi.org/10.15587/1729-4061.2021.243993

Issue

Vol. 6 No. 12 (114) (2021): Materials Science

Section

Materials Science

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Copyright (c) 2021 Parlindungan Manik, Agus Suprihanto, Sri Nugroho, Sulardjaka Sulardjaka

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