Articles written in Sadhana
Volume 47 All articles Published: 10 June 2022 Article ID 0111
Effect of particle doping on the mechanical behavior of 2D woven (0°/90°) jute fabric (plain weave) reinforced polymer matrix composites
VIVEK SINGH PARSHANT KUMAR V K SRIVASTAVA
The performance and functionality of natural fiber reinforced polymer composites can be enhanced many folds by incorporating hard filler particulates which may significantly increase mechanical properties. This study was aimed to hybridize the jute fabric reinforced polymer (JFRP) based laminated composites with cement particulates for the enhancement of their mechanical properties. The laminated cement particulates filled jute fabric reinforced polymer (CmJFRP) and JFRP composites were fabricated via hand lay-up method. The weight fraction of cement particles was varied as 1%, 3%, and 5%. The thickness of the composites was also varied as 3.1 mm, 4.4 mm, and 6.3 mm (i.e. by varying the number of lamina). The mechanical behavior of the composites was assessed via tensile test, microhardness, Izod impact test, and critical buckling load. The tensile tests revealed that CmJFRP composites exhibit lower tensile strength than that of JFRP composites, which was mainly ascribed to the agglomeration of cement particles at the fiber/matrix interface. The microhardness, impact strength, and critical buckling load were higher for CmJFRP composites as compared to JFRP composites. The scanning electron microscopy of the fractured composites revealed that crack front changed its plane and direction when it encountered the cement particles.
Volume 47 All articles Published: 12 July 2022 Article ID 0138
Compact 4-port planar MIMO antenna with enhanced isolation for WLAN/WiMAX applications
ADITYA KUMAR SINGHS AJAY KUMAR DWIVEDIS K N NAGESH VIVEK SINGH R S YADAVV
A quad-port MIMO antenna is constructed and studied in this communication with single resonating bands (wideband) for WLAN & WiMAX applications. It is designed by etching out a circular slot from a patch placed on the front side of the substrate & a feeder line on the backside of the substrate. The proposed structure has ≤-10 dB impedance bandwidth of 2540 MHz (4.36–6.90 GHz). To legitimize the work attributes of the proposed MIMO antenna, diversity parameters such as total active reflection coefficient; envelope correlationcoefficient (ECC) & diversity gain are calculated. The isolation is more than 25 dB, justifying the suggested design’s acceptability as a quad-port MIMO antenna. The suggested design’s examination revealed the steady performance and a high degree of agreement between the simulated and measured findings.
Volume 48, 2023
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