Mathematical model and optimisation for tensile strength of human hair reinforced polyester composites

Rao, P. Divakara; Kiran, C. Udaya; Prasad, K.

doi:10.1504/ijcmsse.2019.101658

Cited by 2 publications

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“…After washing, the coconut fiber and human hair were dried at room temperature for 24 hours. Then the human hair fiber is cut at a size of 3 cm because the size of 3 cm has a high tensile strength for human hair fiber [12]. The coco fiber used is a long coir fiber with a length following the size of the composite mold.…”

Section: Fig 1 Hand-layup Methods [17]mentioning

confidence: 99%

“…The tensile strength of the polyester matrix composite reinforced with human hair fiber with a fiber length variation of 1-5 cm has also been studied. The conclusion is that with a human hair fiber size of 3 cm, the highest tensile strength is 31.45 MPa [12]. Previous studies on the investigation of the mechanical behavior of human hair fibers and the various effects of volume fractions have also been discussed with human hair fiber volume fractions of 0, 5, 10, 15, and 20% on mixing epoxy matrix composites.…”

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2022

Jurnal Polimesin

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Currently, composite applications range from the automotive, marine, and even aircraft sectors. One of the composites that have attracted a lot of attention from researchers is composites with natural fibres because natural fibre composites can be used as an alternative to synthetic or plastic materials. The low-density nature of natural fibres can provide good stiffness and strength as in fiberglass-reinforced composites. Coconut coir fibre and human hair waste are the basic materials for the manufacture of composites in this study. Because the amount is abundant so it is easy to obtain. The purpose of this study was to determine the effect of the variation of the best volume fraction of natural fibre composites with polyester matrix on the mechanical properties. The method used is hand layup with 3 variations of fibre volume fraction and polyester matrix, respectively 10:90, 15:85, and 20:80 and with the size of short hair fibres with a size of 3 cm and long coconut fibres with sizes according to the length of the print. The ratio of human hair fibre and coconut fibber is 1:1. Each fraction was tested 3 times to be more accurate. The results of the average tensile strength test with the largest ASTM D638 standard are at the volume fraction of 10:90 with a tensile strength of 19.2 MPa and the average impact test strength with the largest ISO 179-1 standard at the volume fraction of 20:80 is 17, 67 kJ/m². This study showed that the higher the fibres fraction in the composite, the lower the tensile strength but the higher the impact strength. Vice versa, the lower the fibre fraction in the composite, the tensile strength increases but the impact strength decreases.

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Section: Fig 1 Hand-layup Methods [17]mentioning

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2022

Jurnal Polimesin

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Response Surface Methodology Using Observational Data: A Systematic Literature Review

2022

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In the response surface methodology (RSM), the designed experiment helps create interfactor orthogonality and interpretable response models for the purpose of process and design optimization. However, along with the development of data-recording technology, observational data have emerged as an alternative to experimental data, and they contain potential information on design/process parameters (as factors) and product characteristics that are useful for RSM analysis. Recent studies in various fields have proposed modifications to the standard RSM procedures to adopt observational data and attain considerable results despite some limitations. This paper aims to explore various methods to incorporate observational data in the RSM through a systematic literature review. More than 400 papers were retrieved from the Scopus database, and 83 were selected and carefully reviewed. To adopt observational data, modifications to the procedures of RSM analysis include the design of the experiment (DoE), response modeling, and design/process optimization. The proposed approaches were then mapped to capture the sequence of the modified RSM analysis. The findings highlight the novelty of observational-data-based RSM (RSM-OD) for generating reproducible results involving the discussion of the treatments for observational data as an alternative to the DoE, the refinement of the RSM model to fit the data, and the adaptation of the optimization technique. Future potential research, such as the improvement of factor orthogonality and RSM model modifications, is also discussed.

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Mathematical model and optimisation for tensile strength of human hair reinforced polyester composites

Cited by 2 publications

References 5 publications

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Response Surface Methodology Using Observational Data: A Systematic Literature Review

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