Development of a lightweight, high strength of flexible structure for underwater sensor holder using Selective Laser Sintering (SLS)

Badrul Hisham, Siti Aisyah (2022) Development of a lightweight, high strength of flexible structure for underwater sensor holder using Selective Laser Sintering (SLS). Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Melaka River is attraction of tourist from all over Malaysia and world wide causing the increasing number of tourist to Malaysia. Meanwhile, Perbadanan Pembangunan Sungai dan Pantai Melaka (PPSPM) working so hard to sustain the of Melaka River starting from Batu Hampar to Bandar Hilir. One of the method is measuring the water level at Melaka River so that the river cruise boat can working follows the minimum water level of river. While taking the measurement the structure is click together in front of the boat and will face a lot of circumtances like waves, air-resistant and water pressure. Accurate reading will get when the sensor starting to measure from water surface until riverbed if the sensor fully sink into the water the reading is not accurate. In this study, design and material playing big role to produce the best product design that meet user requirements. It is a challenge to provide PPSM with a durable, easy to maintain together without compromise the functionality and accuracy of its sensors and the data delivery to the end users. The part design need to go through design analysis in Finite Element Analysis (FEA) to figure out which part is under stress, yield strength and deformation. Since the sensor holder will bend with consistent load from the underwater sensor. The colour bar from FEA will be discretized to aid in the understanding how large an area of certain stress level is. Selective Laser Sintering is selected method that will fabricate the product material. The best conceptual design choosen based on factor of safety which is 5 with the highest design score for Product Design Specification (PDS) which 17 points. The selection material Nylon 12 or PA-12 are because it has good material properties such as hardness, tensile strength and resistance to abrasion. Based on analysis, design and development of flexible structure it will give accurate data reading of water level with high strength and lightweight structure.

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