Effect of stacking sequence on mechanical strength of bamboo/Kevlar K29 inter-ply laminated hybrid composite

In this study, a hybrid composite of bamboo/Kevlar K29 with epoxy matrix has been developed with different staking sequences. The variation in mechanical properties, such as tensile, compressive and flexural of composite due to variation in staking sequence is analysed and presented. From the analysis, it is observed that the sandwich composite with Kevlar laminates at both the ends exhibits better tensile and compressive properties and on the other hand, the composite with both the bamboo layers on the upper side displays better flexural properties

EDM of Al7075-B4C-flyash hybrid metal matrix nano-composites and optimization of sustainable measures using genetic algorithm

Sustainability is an important approach in today’s manufacturing environment to achieve overall efficiency in terms of economic, environmental and social aspects. This research work aims to investigate the applicability of sustainability in electrical discharge machining (EDM) of Al7075-B4C-flyash hybrid metal matrix nano-composites (HMMNCs). The machining experiments are conducted using central composite design with voltage (V), current (I), pulse-on-time (Ton) and pulse-off-time (Toff) as process parameters and surface roughness and power consumption are being sustainable measures. Mathematical predictive models were developed using response surface methodology (RSM). The predicted performance of the model shows an error percentage 3.76% and 3.97% for surface roughness and power consumption respectively. The experimental results obtained are analysed using 3D contour plots and current and pulse-on-time found most dominating parameters. The sustainable measures are optimized simultaneously using the popular optimization tool i.e., genetic algorithm. The Pareto optimal fronts provide different optimum cutting conditions for production of components with minimum power consumption satisfying the desired surface roughness value. The approach is found to be an effective tool and can be developed with minimum effort and help shop floor engineer towards sustainable machining approach

Influence of TiC on Microstructure, Mechanical and Wear Properties of Magnesium alloy (AZ91D) Matrix Composites

164–169This paper deals with the wear and mechanical (tensile, compressive, and microhardness) properties of Mg/TiC composites over magnesium alloy (AZ91D). Magnesium based metal matrix (AZ91D) composites were synthesized by using TiC particles varying wt % from 0% to 20% with a step of 5% by stir casting. The mechanical properties shows there is significant improvement of ultimate tensile strength (UTS) & % elongation, compressive strength, and microhardness with % increase of TiC content in Mg alloy. The fracture mechanism of the tensile and compressive specimen was investigated by Scanning Electron Microscope (SEM). A Pin-on-Disk (POD) tribotester was used to determine the wear rate (WR) and specific wear rate (SWR) of the composites. The test was carried out in a dry sliding condition of varying load of 10N, 30N and 50 N corresponding to a constant sliding distance & sliding speed of 1000 m and 1 m/s respectively and the worn surface of the pin is examined by SEM after the test

Influence of TiC on Microstructure, Mechanical and Wear Properties of Magnesium alloy (AZ91D) Matrix Composites

This paper deals with the wear and mechanical (tensile, compressive, and microhardness) properties of Mg/TiC composites over magnesium alloy (AZ91D). Magnesium based metal matrix (AZ91D) composites were synthesized by using TiC particles varying wt % from 0% to 20% with a step of 5% by stir casting. The mechanical properties shows there is significant improvement of ultimate tensile strength (UTS) & % elongation, compressive strength, and microhardness with % increase of TiC content in Mg alloy. The fracture mechanism of the tensile and compressive specimen was investigated by Scanning Electron Microscope (SEM). A Pin-on-Disk (POD) tribotester was used to determine the wear rate (WR) and specific wear rate (SWR) of the composites. The test was carried out in a dry sliding condition of varying load of 10N, 30N and 50 N corresponding to a constant sliding distance & sliding speed of 1000 m and 1 m/s respectively and the worn surface of the pin is examined by SEM after the test

Effect of stacking sequence on mechanical strength of bamboo/Kevlar K29 inter-ply laminated hybrid composite

230-234In this study, a hybrid composite of bamboo/Kevlar K29 with epoxy matrix has been developed with different staking sequences. The variation in mechanical properties, such as tensile, compressive and flexural of composite due to variation in staking sequence is analysed and presented. From the analysis, it is observed that the sandwich composite with Kevlar laminates at both the ends exhibits better tensile and compressive properties and on the other hand, the composite with both the bamboo layers on the upper side displays better flexural properties

Influence of Kevlar Hybridization on Dielectric and Conductivity of Bamboo Fiber Reinforced Epoxy Composite

In a motive to develop a natural fiber-based dielectric material, bamboo fiber-reinforced epoxy composite is fabricated using hand layup technique and hybridized with Kevlar K29 fiber to enhance its properties. Dielectric and conductivity studies are performed using LCR meter on the composite samples as a function of frequency (100 Hz-1 MHz) and temperature (22–120°C). From the experiment, it is observed that the dielectric properties of bamboo-based natural composite are significantly enhanced by Kevlar hybridization. And also the influence of variation in frequency and temperature on the electrical properties i.e. dielectric and conductivity of the fabricated composite was studied. The morphological study is also carried out using scanning electron microscope (SEM)