Applicability of J.N. Newman Ship Wave Integral Equation of Linear Thin Ship Theory for a Fuller Hull Form Solved by Final Root Method
J.N. Newman ship wave integral of a linear thin ship theory Rw is a well-known equation for analysing wave energy generated by moving ships. The equation derived on the assumption that the wave energy radiated downstream by a 3-dimensional ship is equal to the wave resist...
Tool Life and Surface Roughness in Dry High Speed Milling of Aluminum Alloy 7075-T6 Using Bull Nose Carbide Insert
The paper reports the findings of the experimental work to study the impact of machining parameters, particularly cutting speed, feed rate, and axial depth of cut towards cutting tool life and machined surface roughness in high-speed milling aluminium alloy 7075-T6 with bullnose cutter&...
Time Step Sensitivity Analysis of a Flow-Driven Savonius Rotor
The difficulty in choosing the right combination of time step and time increment in simulating a flow-driven rotating rotor is largely attributed to the wind speed dependent time constant which is defined as the elapsed time for the rotor to reach its stable rotational speed.&...
Power Consumption in Milling of Titanium Grade-2 under an Improved Cutting Fluid Supply System
The machining of titanium is very costly due to the high market price of the material, required cutting tool and power consumption among others. Titanium is among the hardness engineering material and currently, its weight-to-strength ratio makes it one of the most attractive mater...
Performance Evaluation on the Smartness of Malaysian Timber
Smart wood materials have been widely developed as green alternatives to the current infrastructures. The main property of wood that contributes to its smartness is hygroscopic, the ability of exchanging water with its environment. The objective of this work is to review and evalua...
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Effect of Maleic Anhydride Polypropylene on the Properties of Spear Grass Fiber in Reinforced Polypropylene and Ethylene Propylene Diene Monomer Composites
Polypropylene ethylene propylene diene monomer (PP/EPDM) polymer composites reinforced by spear grass (10, 20, 30, 40, and 50 wt. %) were prepared with and without compatibilizer. The maleic anhydride polypropylene (MAPP) was applied as compatibilizer to the composites. The water absorption&...
Discrete-Time Linear System of New Series Motor Four-Quadrant Drive Direct Current Chopper Numerically Represented by Taylor Series: Part 1: Driving Mode Operation
This paper proposes a numerical method using Taylor series in representing a new series motor of a four-quadrant drive direct current chopper (FQDC) in driving mode operation for electric vehicle’s application. The representation has three main purposes which are for troubleshooting, error...
Digital Proportional Integral Derivative (PID) Controller for Closed-Loop Direct Current Control of an Electric Vehicle Traction Tuned Using Pole Placement
Direct current (DC) series motors have a higher starting torque compared to other types of motors, and their power is in the kilowatt range. The standard speed is applied for electric vehicles (EVs) with a series motor, and four quadrants direct current chopper (FQDC) can ...
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