Micromechanical modelling of oil palm empty fruit bunch fibres containing silica bodies. (September 2016)

• Record Type: Journal Article
• Authors: Omar, Farah Nadia; Hanipah, Suhaiza Hanim; Xiang, Loo Yu; Mohammed, Mohd Afandi P.; Baharuddin, Azhari Samsu; Abdullah, Jaafar
• Is Part Of: Journal of the mechanical behavior of biomedical materials. Volume 62(2016)
• Page Start: 106
• Page End: 118
• Publication Date: 2016-09
• Subjects: ADF Acid detergent fibre -- ADL Acid detergent liquid -- ATR Attenuated total reflectance -- CZM Cohesive zone model -- CW Cell wall -- FTIR Fourier Transform infrared -- NDF Neutral detergent fibre -- OPEFB Oil palm empty fruit bunch -- PRN Parallel rheological network -- RVE Representative volume element -- SEM Scanning electron microscope -- µ-CT X-ray micro-tomography; Finite-element-micromechanics -- Silica-body-fibre-interface -- X-ray-micro-tomography; Biomedical materials -- Periodicals; Biomedical materials -- Mechanical properties -- Periodicals; Biomedical materials; Biomedical materials -- Mechanical properties; Periodicals; Electronic journals; 610.28
• DOI: 10.1016/j.jmbbm.2016.04.043
• Languages: English
• ISSNs: 1751-6161

Abstract

Abstract: Experimental and numerical investigation was conducted to study the micromechanics of oil palm empty fruit bunch fibres containing silica bodies. The finite viscoelastic–plastic material model called Parallel Rheological Network model was proposed, that fitted well with cyclic and stress relaxation tensile tests of the fibres. Representative volume element and microstructure models were developed using finite element method, where the models information was obtained from microscopy and X-ray micro-tomography analyses. Simulation results showed that difference of the fibres model with silica bodies and those without ones is larger under shear than compression and tension. However, in comparison to geometrical effect (i.e. silica bodies), it is suggested that ultrastructure components of the fibres (modelled using finite viscoelastic–plastic model) is responsible for the complex mechanical behaviour of oil palm fibres. This can be due to cellulose, hemicellulose and lignin components and the interface behaviour, as reported on other lignocellulosic materials.