Thermal buckling of braided flax woven polylactic acid composites

Abstract

This study presents influence of thermal environment on buckling behaviour of natural fibre braided yarn fabric reinforced polylactic acid composite beams. The thermal buckling study is carried out using an in-house built experimental set up for beam like composites exposed to different types of in-plane temperature variations. Influences of temperature variations, direction of loading and volume fraction of fibre are studied in detail. Results indicate that deflection behaviour of natural fibre braided fabric/polylactic acid beam is entirely different from the polylactic acid beam. Enhancement of natural fibre braided fabric reinforcement on thermal deflection is observed only at higher temperature as less deflection is observed for polylactic acid beams at lower temperature range (25°C to 45°C). According to the nature of heating, maximum deflection in the range of 0.503 cm to 1.082 cm corresponding to the temperature range of 63.443°C to 67.917°C is observed for polylactic acid beams. For natural fibre braided fabric/polylactic acid beams, the maximum deflection range is 0.826 cm to 0.105 cm corresponding to the temperature range of 57.031°C to 44.742°C according to the heating condition. Thermal deflection of natural fibre braided fabric beam is sensitive to testing orientation of the beam and maximum deflection for warp loading is 29% to 54% lower than the weft loading.

Relation between water absorption and mechanical properties of flax 3D braided yarn woven fabric PLA bio-degradable composites

“…Similarly, the braided composite's tensile strength and flexural strength are 202% and 108% higher than the short-random fibre composites. Also, Kanakannavar et al 21,22 presented that the addition of NF plain woven fabric with braided yarn with the PLA polymer has good wear resistance and resistance to thermal deflection properties compared to pristine PLA.…”

Biodegradation properties and thermogravimetric analysis of 3D braided flax PLA textile composites

“…Based on these studies, effort has been put to analyse the properties of the natural fiber 3 D braided yarn plain woven fabric (NFBF) reinforced fully biodegradable composites. The wear resistance and thermal buckling resistance properties of the PLA composites are improved with the reinforcement of textile fabric with 3 D braided flax yarn compared to neat PLA [36,37].…”

Performance and Mechanical Characterization of Tufted and Untufted Woven Pine Apple Leaf Fibre Reinforced with Poly Lactic Acid Green Composites

“…Engineering Materials: Properties and Processing Technologies Fabrication of composites: Initially we prepared the (WPALF/PLA) pre laminate by dissolving pure PLA pellets in dichloromethane by using mechanical stirrer and hand layup technique was used to prepare the tufted and untufted woven pine apple leaf fiber reinforced composites. The required dissolved PLA solution is applied to the bottom of the sandwich mat with the help of steel roller which is used for uniform distribution of the PLA solution [7]. The same process was followed up for the another side of the sandwich mat and the mold will be closed by applying manual load, kept the sandwich pre laminate in the hot micro wave oven to maintained the temperature up to 48⁰ c to remove the excess amount of dichloromethane and moisture content for about 48 hours.…”

“…The same process was followed up for the another side of the sandwich mat and the mold will be closed by applying manual load, kept the sandwich pre laminate in the hot micro wave oven to maintained the temperature up to 48⁰ c to remove the excess amount of dichloromethane and moisture content for about 48 hours. Following up the process the pre laminate in the steel mold (300x300x3mm) have to fixed inside the compression molding machine and maintained with constant temperature up to 180⁰c [7]. Then we are applying load gradually from 2MPa to 5MPa for 15 minutes to avoid the formation of voids, and crack inside of composite laminates.…”

“…Then we are applying load gradually from 2MPa to 5MPa for 15 minutes to avoid the formation of voids, and crack inside of composite laminates. After completing the compression molding process the closed mold will be maintained at room temperature for 24 hours for curing the sandwich composite laminates [7,8]. And then the specimens were cut using water jet machine according to the ASTM standard dimensions.…”