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Dynamic mechanical characterization of epoxy composite reinforced with areca nut husk fiber

Muralidhar N., Kaliveeran Vadivuchezhian, Arumugam V., Srinivasula Reddy I.

Archive of Mechanical Engineering

2020

LXVII, nr 1

57--72

Natural fiber polymer composites are gaining focus as low cost and light weight composite material due to the availability and ecofriendly nature of the natural fiber. Fiber composites are widely used in civil engineering, marine and aerospace industries where dynamic loads and environmental loads persist. Dynamic analysis of these composites under different loading and environmental conditions is essential before their usage. The present study focuses on the dynamic behavior of areca nut husk reinforced epoxy composites under different loading frequencies (5 Hz, 10 Hz and 15 Hz) and different temperatures (ranging from 28◦C to 120◦C). The effect of loading and temperature on storage modulus, loss modulus and glass transition temperature was analyzed. Increase in storage modulus is observed with increase in loading frequency. The storage modulus decreases with increase in temperature. The glass transition temperature of the composite is determined to be 105◦C. The elastic modulus calculated from the DMA data is compared with three point bending test

Hydrostatic Resistance and Mechanical Behaviours of Breathable Layered Waterproof Fabrics

Razzaque A., Tesinova P., Hes L., Arumugam V.

Fibres & Textiles in Eastern Europe

2018

Vol. 26, no. 1 (127)

108--112

Breathable layered waterproof fabrics have good applications in the fields of sportswear, protective clothing and construction industries. The properties of these fabrics in allowing water vapour to pass through while preventing liquid water from entering have made them unique. The mechanical properties of these fabrics are also very important for the satisfaction of the wearers. The layered constructions of these fabrics with different characteristic properties contribute to the influence on their hydrostatic resistance, mechanical properties and water vapour permeability. This study presents an experiment on eight different types of hydrophobic and hydrophilic membrane laminated layered fabrics used as sportswear during hot or cold weather. The hydrostatic resistance, tensile strength, stiffness and water vapour permeability of these fabrics were evaluated by varying different fabric parameters in the experiment. It was found from the test results that the fabric density, thickness and weight as well as types of membranes and layers have a significant effect on those properties of the layered fabrics.

Oddychające warstwowe materiały wodoodporne mają szerokie zastosowanie w odzieży sportowej i ochronnej. Zdolność przepuszczania pary wodnej i dobre właściwości mechaniczne takich materiałów są korzystne pod kątem komfortu ich użytkowania. Zbadano osiem typów membran hydrofobowych i hydrofilowych, stosowanych do produkcji odzieży sportowej używanej w czasie upałów lub chłodów. Oceniono właściwości hydrostatyczne, wytrzymałość na rozciąganie, sztywność i przepuszczalność pary wodnej tychże materiałów. Na podstawie wyników badań stwierdzono, że gęstość, grubość i gramatura materiału, a także rodzaje membran i warstw mają znaczący wpływ na właściwości hydrostatyczne i mechaniczne oddychających warstwowych materiałów wodoodpornych.