PSI - Issue 71

Manas Samantaray et al. / Procedia Structural Integrity 71 (2025) 348–356

351

10 20 30 40

1.982 × 10 11 1.791 × 10 11 1.662 × 10 11 1.403 × 10 11

4.64 4.75 4.29 4.38

Table.6. Comparison between time and weight gain percentage.

Time (Hours)

Weight Gain in %

4 6 8

1.5 2.1 2.6 2.8 3.4

10 12

Table.7. Comparison between frequency and sound absorption coefficient.

Sound absorption coefficient (α)

Frequency in Hz

0-500 500-1000 1000-1500 1500-2000 2000-2500 2500-3000 3000-3500 3500-4000

0.15 0.24 0.38 0.61 0.84 0.94 0.98 0.99

2. Experimental Analysis In recent days, epoxy resins comprise a broad class of substances. Because of its high adherence to a variety of surfaces, stability, conformability and reduced shrinkage, epoxy is a great binder for paints, wires, moulds, composites, and other surfaces. A thermoset resin is one that uses curing agents, such heat or radiation, to harden or cure. One of the most widely utilized thermosets in structural and specialty composite applications nowadays is epoxy, also referred to as epoxy resin. Because epoxy resins have a high degree of crosslinking, they are exceedingly robust. Additional material from textile waste and tailor’s waste garbage is used as pre consumer textile waste. By using a rag remover, the fibres are extracted from textile waste. The fibres retrieved from waste materials are called "bad fibres" (Figure 1). Cotton fibre provides moderate strength, and flexibility contributes to mechanical stability. The strip is then used as a preform. It is meant to be used by hand. As indicated in Figure 3, the foundation material consisted of L12 epoxy resin and K6 curing agent. The study examines the effect of carding speed on arrangement of reinforcements, which impacts the characteristic of developed material. The experiment examines various roller speeds (50,100,150,200 and 250) to find the optimal carding speed of waste cotton fibre. We selected a cheap cotton cloth for the study, ensuring it had the appropriate measurements and weight based on the fiber volume percentage and then combined the cotton cloth with waste cotton fibers in a standard ratio. The prepared cotton fabric was placed inside the mould and resin was poured into it to achieve ideal wetting of the fibre. The experiment was done by using a compression molding machine. Evaluation of the Composite Specimens' Mechanical Properties. The tensile, bending, notch strength of the samples were evaluated in accordance with ASTM D3039, ASTM D7264, and ISO 180:2000. Tensile test dimensions were 300, 30 and 5 millimeters. Composite sample 35:1 and of 100 mm were produced for bending test. The tests were conducted by using