Development and testing of airflow resistivity system for an acoustic material with rapid prototyping

Ibrahim, Mohamad Amir (2023) Development and testing of airflow resistivity system for an acoustic material with rapid prototyping. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, natural fiber can replace synthetic fiber as the new material for composites application in the various industrial sector because it is a more eco-friendly material compared to synthetic fiber. Natural fibers have more advantages than synthetic fibers because they are renewable, biodegradable, and carbon-neutral materials that may be used without diminishing or harming the environment. This research aims to improve the design of the airflow test rig compared to the previous design and to study the airflow resistivity of natural fiber that is rice husk based on the acoustic property of different thicknesses and densities of the natural fiber using the airflow test rig. The exact parameter of the cylinder is important to design it in SolidWorks software to make sure the specimen fits in the air flow test rig. 3D printing equipment is used to make the actual cylinder shape of the airflow test rig. The resistivity of airflow is an important requirement when using natural fiber as a material to make a product that has air flow such as bicycles, parachutes, and others. The airflow test rig is a device to measure the rate of airflow. Firstly, the mechanism of the airflow test rig is the vacuum will be attached to the airflow test rig to make a suction of airflow. Arduino Mega 2650 was used to collect the reading of differential pressure in the test rig while anemometer was used to collect the ouput velocity of airflow in the test rig. Lastly, the calculation have been made from the results of output velocity and differential pressure to obtain the air resistivity data from airflow test rig and data analysis have been made. The results of this research have been conclude that the air resistivity will decreases if the thickness increases and if density increases the airlow resistivity will decreases. All the objective was achieved. Last but not least, the research must be continued for further study because it use new material.

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