Mechanical Properties of Activated Carbon (AC) Coir Fibers Reinforced with Epoxy Resin

Salleh, Zulzamri; Yusop, Mohd Yuzri Mohd; Rosdi, M.S.

doi:10.15282/jmes.5.2013.9.0060

Cited by 21 publications

(16 citation statements)

References 13 publications

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“…It is worth noting that using thermoset resin such as epoxy and polyester is strongly recommended as the matrix in developing natural fiber composites for structural applications [30]. Research into the feasibility of reinforcing epoxy or polyester with natural fibers has been reported in several literature [31][32][33][34]. A comprehensive theoretical framework for the new sandwich structure panel developed in this research under flexural loading was thoroughly discussed [35], while the statistical analysis of the flexural test was reported earlier [36].…”

Section: Introductionmentioning

confidence: 99%

Flexural behaviour of hybrid sandwich panel with natural fiber composites as the intermediate layer

Fajrin¹,

Zhuge²,

Bullen³

et al. 2016

J. MECH. ENG. SCI.

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Polymeric composites reinforced with natural fibers have raised more attention as the alternative building materials. In this work, natural fiber composites prepared from jute and hemp fiber were proposed for the intermediate layer of a hybrid sandwich panel. This paper presented the flexural behavior of the newly developed hybrid sandwich panel which included the comparison of the ultimate load, load-deflection behavior, load-strain behavior and failure modes. The study was designed as a single factor experiment where the performance of hybrid sandwich panels containing jute fiber composite (JFC) and hemp fiber composite (HFC) as the intermediate layer was compared to the control (CTR) which was a conventional sandwich panel without an intermediate layer. A static flexural test under a four-point bending load scheme was performed in accordance with the ASTM C 393-00 standard. Aluminium sheet was used as the skins, while expanded polystyrene (EPS) was employed for the core. The testing was performed using a 100 kN servohydraulic machine with a loading rate of 5 mm/min. The applied load, displacement and strains were obtained using data logger. The results demonstrated that the hybrid sandwich panel exhibited a more superior performance than the conventional sandwich panels. The intermediate layer contributed significantly to enhancing the load carrying capacity of the hybrid sandwich panel. The load carrying capacity of hybrid panel with the JFC intermediate layer was 29.60% higher than the conventional sandwich panel, and correspondingly 93.46% higher for the sandwich panel with the HFC intermediate layer.The hybrid sandwich panels also developed a much larger area under the load-deflection curve, indicating greater toughness. The introduction of intermediate layer helped the hybrid sandwich panels to sustain a larger strain prior to reach their ultimate loads, resulting in a higher deformation capability. Indentation and core shear were observed as the failure mode of the conventional sandwich panel. Meanwhile, core shear and delamination were identified as the failure mode of the hybrid sandwich panel.

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Section: Introductionmentioning

confidence: 99%

Flexural behaviour of hybrid sandwich panel with natural fiber composites as the intermediate layer

Fajrin¹,

Zhuge²,

Bullen³

et al. 2016

J. MECH. ENG. SCI.

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show abstract

“…They found that true stress is directly linked to holding temperature and time [11]. Saleh et al [12] investigated the mechanical properties of composite materials by the tensile, impact, and creep tests and found that CKCF carbon composites have better mechanical properties in comparison of CRCF and CYCF carbon composites. Hariprasad et al [13] investigated the tensile and impact strengths of an alkali-treated banana-coir epoxy hybrid composite and found that tensile and impact strengths are more than untreated banana-coir epoxy hybrid composite, whereas the flexural strength of the untreated banana-coir epoxy hybrid composite was more.…”

Section: Introductionmentioning

confidence: 99%

Investigation of micro-structure and mechanical properties of three steel alloys

Jha¹

2017

Int. J. Automot. Mech. Eng.

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The significant demands of steel in industrial applications and automotive and building industries are increasing. Thus, there is a need for the improvement of its mechanical properties by adding suitable alloy elements to them so that they have more strengthweight ratio. The objective of this research is to study the effect of adding various alloys to steel material and their effects on tensile and impact strengths, hardness, and microstructure. The tensile test was conducted on a round bar standard specimens of three kinds of steel having different compositions to investigate their mechanical properties. The results of tensile tests are given in tables, based on their stress-strain curves plotted to facilitate the design engineer to know the strength and accordingly design lightweight structures from this material. After the test, the microstructure of the fracture surface was observed using an inverted microscope. The tensile and impact strengths and hardness of carbon steel, EN 8 steel, and mild steel were evaluated and compared based on the chemical composition and microstructural observation. The experimental result showed that the increasing percentage of carbon and silicon in EN 8 steel increased its ultimate tensile and yielded strengths but reduced the percentage elongation compared to carbon steel. Similarly, less content of manganese with an increased content of nickel enhanced the impact strength of the mild steel but slightly reduced the tensile strength and hardness of mild steel compared to EN 8 steel.

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“…The VCCT has been commonly employed by various researchers to simulate the mode III delamination of carbon/epoxy [6,[14][15][16] and glass/epoxy [3,5,[17][18][19][20] composite laminates. Nevertheless, in recent years, the CZM has gained its popularity in simulating the delamination behaviour of laminated composites.…”

Section: Introductionmentioning

confidence: 99%

Cohesive zone modelling of Mode III delamination using the edge crack torsion test

Israr¹,

Wong²,

Tamin³

2017

J. MECH. ENG. SCI.

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In the experimental studies of mode III delamination using the edge crack torsion test, the crack initiation and propagation measurement are always difficult. This information could be obtained through numerical modelling. The objective of this study is to propose a guideline to model mode III delamination behaviour using cohesive elements. Finite element models of an edge crack torsion specimen were developed based on the data from the literature. The delamination behaviour of the specimen along the pre-crack, which was located at the mid-thickness location, was modelled using cohesive elements. Through parametric studies, it was found that for reliable numerical modelling, a mesh size of 0.5 mm was suggested, which provided three elements in the cohesive zone. As for the interface strength, it was recommended to choose 80 MPa. In addition, a viscosity parameter of 110 -3 was found to be a good choice for reasonable computational time and converged numerical results. Besides, the interface stiffness was suggested to be 410 6 MPa/mm. Furthermore, the fracture process zone contour revealed that the delamination was started at a normalised location of approximately 0.7. Not only that, the fracture energy and strain distribution plots have shown the delamination was mode III dominated within the normalised distance of 0.34-0.86. The results from this study suggested that cohesive zone modelling is a useful method for the detailed analysis of the mode III delamination of an ECT specimen. The numerical modelling approach suggested from this study could be applied to ECT specimens at various different initial crack lengths. It also has the potential to be used to simulate the mode III delamination of other various types of laminated composites.

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Mechanical Properties of Activated Carbon (AC) Coir Fibers Reinforced with Epoxy Resin

Cited by 21 publications

References 13 publications

Flexural behaviour of hybrid sandwich panel with natural fiber composites as the intermediate layer

Flexural behaviour of hybrid sandwich panel with natural fiber composites as the intermediate layer

Investigation of micro-structure and mechanical properties of three steel alloys

Cohesive zone modelling of Mode III delamination using the edge crack torsion test

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