Dwivedi, Swapnil and Agarwal, Anil
(2018)
Modeling and Design of Pultruded FRP Members.
Masters thesis, Indian Institute of Technology Hyderabad.
Abstract
Pultruded glass fiber reinforced plastics were tested experimentally and modeled using Finite element software Abaqus. Coupon testing was done for material characterization. Coupons were tested in tension, compression, bearing and provisions of respective ASTM codes were followed while performing experiments. Youngs modulus, Maximum load and Maximum stress of coupon specimens under tension and compression were determined.
Experimental testing of short hollow tubes (230mm diameter,6mm thick and 300mm long) was performed under axial compression. Maximum load, Maximum stress and Youngs modulus of all specimens were determined. A comparison of Youngs modulus obtained from coupon testing as well as from short hollow tubes was done.
Numerical modeling of pultruded H beams was done in abaqus and correlation between mid-span deflection obtained from experiments and numerical modeling was determined.
Optimization studies on seven-meter-long pole was done. Fiber orientation in mats and number of rovings were varied keeping volume fraction same to see the effect on stiffness of GFRP pole. Longitudinal fibers behaved better than any other fibers in stiffness determination
To study shear effects a 0.5 meter GFRP pole was modeled with same stacking sequence as that of seven-meter-long GFRP pole. As expected fibers in +45 and -45 directions behaved better than other fibers in stiffness determination.
Four composite plates were prepared by hand layup technique. One composite plate was made with 10 mats and in other plates number of rovings and mats were varied.
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