Influencing the optimum AWJM key factors on drilling quality of biochar-interlaced glass fibre-reinforced epoxy composites: Multi-response optimisation approach KG Saravanan, S Gokulraj, M Rajesh, S Ram Prakash Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, 2026 In recent years, the inclusion of biochar fillers in the polymer matrix has been used to enhance the mechanical, dielectric and dynamic properties of the composite. High-performance structural components are often made using polymer composites. This work focuses on the development of glass fibre interleaved almond biochar filler (ABC-5, 10 and 15%) reinforced polymer composites through a hand layup process. The machinability of the composite was then investigated in abrasive water jet machining by considering the biochar filler quantity, water pressure (WP), traverse speed (TS) and standoff distance (SOD). The kerf angle (KA) and surface roughness (SR) were used to assess the machining performance. The addition of a biochar filler in the composite increases the SR and KA quality. The machining performance of the biochar-filled composite is better when there is an increase in water pressure and a decrease in SOD and TS. Analysis of Variance (ANOVA) reveals that the ABC% significantly influence the SR and KA trialed by JP. The combination of WP 200 MPa with ABC10% composite laminate results in decreased values of KA (1.09o) and SR (2.754 µm). The ideal parameters for achieving lower SR and KA are TS of 20 mm/min, 3 mm of SOD, 200 bar of WP and 10% biochar composite in combination. Moreover, scanning electron microscopic (SEM) images ensure the smoothness of the surface texture at high water pressure (WP) with 10% almond biochar composite laminate, cutting and finishing are smooth. The biochar fillers reinforced in hybrid composites exhibited good surface quality, free of pullouts and fibre delamination.
EXPERIMENTAL INVESTIGATION AND OPTIMIZATION ON ABRASIVE WATERJET DRILLING OF INCONEL-939 ALLOY Praveen Jayapalan, Rajesh Munusamy, Sandhya Jayakumar Journal of Engineering and Technology for Industrial Applications, 2026 Inconel 939, the nickle-based superalloy has exceptional properties that include its high thermal and mechanical behaviours. Owing to this properties Inconel 739 demand in various industries like aerospace, automobile. Machining is unavoidable to use Inconel 739 alloys. Abrasive water jet drilling (AWJD) adopted to analysis and Optimize the MRR (Material Removal Rate) and SR (Surface Roughness) by integrating the RSM (Response Surface Methodology)-CCD (Central Composite Design)-Desirability approach. The L27 Experiments conducted by adopting variation in the Pressure, Traverse Speed, Abrasive Flow Rate and Standoff gap distance. The developed model validated statistically, its suitable for further analysis. Analysis of Variations (ANOVA) illustrations the Pressure was high influential variable in the responses and optimization processes. The developed model of regression shows minimal error between predicted and actual values. Three dimensional plots and used for capture the parameters effect in the responses. Pressure was influencing the 72.7% and 78.8% on SR and MRR Respectively. Desirability approach shows the validation error less than the acceptable limits.
Enhancing Combustion, Performance and Emission Profiles Using Kapok Methyl Ester Blends with Hydrogen B Anbarasan, Kumaresan M, S Balamurugan, Munnusamy Rajesh SAE Technical Papers, 2026 This study investigates the potential of using a dual green alternative fuel combination, the one is hydrogen fuel and another one is biodiesel for enhancing the Performance, combustion and emission profile of a compression ignition engine. The kapok oil biodiesel was blended with Diesel in proportions of 20% (K20) and 40% (K40) by volume. The hydrogen gas was supplied at a constant flow of 4 liter per minute (LPM). The experimental fuels are neat diesel D100, K20 (80% Diesel and 20 % kapok methyl ester), K40 (60% Diesel + 40 % Kapok methyl ester), K20 + H4L (K20 with 4 LPM hydrogen) and K40+H4L (K40 with 4 LPM hydrogen). These test blends are investigated in a single cylinder direct injection CI engine under 0% to 100% load conditions at a fixed speed of 1500 rpm combustion, and emissions characteristic were evaluated and compared with base fuel. The outcomes indicated that the use of B20 and B40 blends without hydrogen led to reduced BTE because of their lower cetane number and calorific value. Additionally, higher viscosity of the blends resulted in increased BFSC. However, the introduction of hydrogen and the K20H fuel blend demonstrated notable emission improvements compared to conventional diesel, achieving reductions of 9–11% in unburned hydrocarbons, 5.3% in carbon monoxide, and approximately 8% in nitrogen oxides (NOₓ). These findings highlight the potential of K20H as a cleaner alternative fuel.
An overview of delamination in conventional and vibration assisted drilling on glass fiber reinforced polymer composites Journal of Chemical and Pharmaceutical Sciences, 2015
A review on delamination in conventional and vibrated assisted drilling in glass fiber reinforced polymer composites International Journal of Chemtech Research, 2014
