Investigation and prediction of mechanical properties of hot water treated jute/poly(lactic acid) composite laminates using response surface methodology and genetic algorithm

Abstract

The main objective of this work was to estimate the usefulness of response surface methodology (RSM) and genetic algorithm (GA) in modeling and predicting the strength of jute/poly(lactic acid) (PLA) composite laminates. Firstly, the impact of the hot water treatment on the thermal, molecular structure, and morphological characterizations as well as kinetic analysis of jute fibers were performed by Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM). The FTIR results showed that the hot water treatments reduced the content of lignin, hemicellulose, and impurities of the fibers. Hot water treated fibers exhibited higher thermal stabilities compared with untreated fibers as shown with TGA results. The SEM results showed effect contact surface area improved after the hot water treatment, leading to better mechanical properties of bio‐composites. Secondly, the influences of the ply orientation, plies and fiber content on the tensile strength and flexural strength of the hot water treated fibers composites were evaluated by RSM. RSM with the Box Behnken Design was utilized to establish the quadratic models of two objectives in response to input parameters. Analysis of variance (ANOVA) was used to determine percentage contribution of various parameters on two quality objectives. According to the ANOVA results, ply orientation had the most important impact on tensile strength while the ply orientation‐fiber content interaction had the most important impact on flexural strength. Finally, multi‐objective optimization was carried out to maximize tensile strength and flexural strength using the desirability function and GA. The optimized results both showed an acceptable relative error between experimental and optimized values.

Thermal aging effect on mechanical properties of polyamide 6 matrix composites produced by TFP and compression molding

“…To achieve this goal, a model was constructed using RSM, a wellregarded approach for modeling complex systems. 36,37 It is commonly employed when the relationship between factors and a response is complex and not easily explained by linear models. RSM involves creating a mathematical model, typically a polynomial equation, to represent the relationship between the input variables and the response.…”

“…The primary objective of this study is to elucidate the influence of holding time and aging on mechanical behavior of produced composite materials. To achieve this goal, a model was constructed using RSM, a well‐regarded approach for modeling complex systems 36,37 . It is commonly employed when the relationship between factors and a response is complex and not easily explained by linear models.…”

Cardanol derivatives as compatibilizers for strengthening and toughening polylactic acid/bamboo fiber bio‐composites

“…23 Zhang et al discovered that the thermal stability and mechanical properties of jute fibers/PLA composites were improved after the hot water treatment. 24 Recently, the development of bio-based plasticizer with low toxic and migration rate using renewable resources has become a popular trend. [25][26][27][28] In particular, polyethylene glycol and tributyl acetyl citrate can be used as nontoxic, environmentally friendly, and biocompatible plasticizers for PLA/BF composites, [29][30][31] albeit with limited effect on their toughness.…”

“…Physical treatments involve using mechanical or thermal techniques to alter the BF surface 23 . Zhang et al discovered that the thermal stability and mechanical properties of jute fibers/PLA composites were improved after the hot water treatment 24 …”