Burst strength of glass fibre/epoxy composite pipes subjected to impact loading

An article discussed during the International Conference on Applications and Design in Mechanical Engineering 2015 (ICADME2015)

icadme2015

The main objective of this experimental study was to investigate the effects of low velocity impact loading on the pressure bearing capacity of the E-glass/epoxy composite pipes. The pipes were produced by the conventional filament winding technique comprises of six axisymmetric layers with (±55°)3 winding angles. The specimens were impacted at three different energy levels which are 5 J, 7.5 J, and 10 J using an instrumented drop weight impact testing machine (IMATEK IM10). The samples were then filled with water and subjected to burst test until distinct leakage failure is observed. The results indicate that the peak force and contact time increases with increased of impact energy. For impacted samples, the pressure tests show that the burst strength of the pipes decreases with increase in energy levels during impact loading. During the burst tests, several damage types named leakage and eruption were observed.

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Design and Analysis of a Laminated Composite Leaf Spring

spring compositeThe paper, published in « International Journal of Current Engineering and Technology » deals with the basic design of a laminated leaf spring and analyzing the composite material values for different orientations of the fiber. For this purpose the laminated leaf springs are made of steel and composite material of unidirectional E-glass/ Epoxy, with the same dimensions. A static test rig is fabricated to conduct deformation test under various loading conditions for both the above materials. The deformations are compared for both the above materials. A three dimensional model of entire leaf spring is modeled using Solid Works. The static analysis is done using ANSYS. It is observed that the deflections in the Composite leaf spring are greater than the steel leaf spring for the same load. The stresses in the Composite leaf spring are less than the steel. And, the spring weight of the Composite leaf spring is observed to be 70% lower than the steel.

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