The influence of different weaving patterns on tensile, acoustic, and vibration behavior of intra‐ply Kevlar and pineapple leaf fiber (PALF) hybrid woven fabric reinforced epoxy matrix composites was investigated. Intra‐ply hybrid Kevlar/PALF woven fabrics were analyzed by three weaves: plain, twill, and basket. Also, epoxy matrix, pure Kevlar, and PALF woven fabric composites were analyzed for comparison purposes. Results revealed that the basket‐type hybrid composites exhibited a higher tensile strength of 77 MPa compared to plain (63 MPa) and twill‐type (73 MPa) hybrid composites. Plain and twill weave hybrid composites presented higher sound transmission loss levels of 28.9 and 30.5 dB, respectively, at higher frequency levels. Free vibration analysis showed that the PALF composites had higher damping and a lower natural frequency whereas the pure Kevlar and hybrid composites (KP1, KP2, and KP3) exhibited lower damping and higher natural frequencies.

In the present study, different weaving patterns (plain, twill, and basket types) on intra‐ply Kevlar and pineapple leaf fiber (PALF) woven hybrid fabrics with epoxy matrix composites were fabricated using compression molding process and their thermomechanical and dynamic mechanical characteristics were examined. From the results, it was evident that pure Kevlar composites have the best flexural, impact, and interlaminar shear strength properties of all composites. However, the basket type weaving pattern on intra‐ply hybrid composites possesses better flexural strength of 282 MPa and flexural modulus of 6 GPa, the impact strength of 16.3 kJ/m2, interlaminar shear strength of 3.43 MPa. Moreover, it is observed that the pure Kevlar and twill type weaving patterns have better thermal stability compared to the remaining composites. The dynamic mechanical analysis results observed plain type intra‐ply hybrid composites possess enhanced storage modulus, loss modulus, and tan delta values due to their greater interfacial adhesion between Kevlar and PALF fiber with epoxy matrix. The differential scanning calorimetry results showed both basket weave and twill weave hybrid composites had the greatest glass transition temperature values of 78 and 76°C, respectively. Further, the thermomechanical analysis showed basket type hybrid composites have the lowest coefficient of thermal expansion and highest glass transition temperature value of 63.34°C. To conclude, these intra‐ply hybrid composites have enhanced mechanical strength and thermal stability, indicating suitable automotive interior parts applications.

In this investigation, the different weaving pattern of intra ply Kevlar and pineapple leaf fiber (PALF) reinforced with epoxy hybrid composites was fabricated using the compression molding method. Solid particle erosion wear properties, water absorption, and thickness swelling behavior were tested. Solid particle erosion wear properties were tested using an air‐jet erosion tester. The various factors for solid particle erosion test were taken as impingement angle, exposure time, and weaving pattern. The weaving pattern was varied as plain type, twill type, basket type. The result showed that basket weave type and pure Kevlar fiber reinforced epoxy composites have better water absorption and thickness swelling properties. The results from the solid particle erosion test indicated that twill type and pure Kevlar fiber reinforced epoxy composites showed superior erosion wear resistance compared to other composites. Further, the statistical analysis was carried out using Taguchi analysis and their results showed that twill type Kevlar/PALF reinforced with epoxy composite was a minimum erosion wear rate at 90° of impingement angle and 6 min exposure time. The erosion mechanism of the surface eroded composite specimens was investigated using scanning electron microscopy.

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