Plastic Material Analysis and Bonding in Small Aquatic Vessels
Academic Level at Time of Presentation
Senior
Major
Engineering Physics (Mechanical)
Minor
Mathematics
List all Project Mentors & Advisor(s)
Dr. Ted Theide
Presentation Format
Poster Presentation - Murray State Access only
Abstract/Description
This project presents the design and development of a suitable vessel for small-scale aquatic applications. Traditionally plastics are fabricated using blow molding to create a single seamless form. However, for small-scale prototyping with limited resources, this method of fabrication is unsustainable in the short term, non-industrial design applications. As a result, an existing longer hull is selected and shortened to meet the required project length requirements. The project evaluates multiple initial hull designs, ultimately selecting the Sun Dolphin 2-Person Sportsman Fishing Boat due to its buoyancy, size, and ability to support the required systems. The modification of the initial design emphasizes transportability and ease of access at the cost of durability. Shortening the hull presents several challenges, particularly in bonding plastics and creating a suitable seam to maintain structural integrity. Plastic welding along with mechanical fasteners is selected as the primary joining method, and various plastic welding techniques are analyzed to determine the most effective solution. Following testing and analysis, the specialty heat gun nozzle plastic weld is the selected joining method and is applied along with mechanical fasteners to the modified hull. Once joined, the hull is refilled with insulation, styrofoam, and wood to reinforce connection points and support the loads of additional external systems. This project provides a sustainable solution for shortening an existing plastic aquatic vessel while maintaining watertight seal, structural integrity, and functional viability for use in small aquatic operations.
Spring Scholars Week 2026
Honors College Senior Thesis Presentations
Plastic Material Analysis and Bonding in Small Aquatic Vessels
This project presents the design and development of a suitable vessel for small-scale aquatic applications. Traditionally plastics are fabricated using blow molding to create a single seamless form. However, for small-scale prototyping with limited resources, this method of fabrication is unsustainable in the short term, non-industrial design applications. As a result, an existing longer hull is selected and shortened to meet the required project length requirements. The project evaluates multiple initial hull designs, ultimately selecting the Sun Dolphin 2-Person Sportsman Fishing Boat due to its buoyancy, size, and ability to support the required systems. The modification of the initial design emphasizes transportability and ease of access at the cost of durability. Shortening the hull presents several challenges, particularly in bonding plastics and creating a suitable seam to maintain structural integrity. Plastic welding along with mechanical fasteners is selected as the primary joining method, and various plastic welding techniques are analyzed to determine the most effective solution. Following testing and analysis, the specialty heat gun nozzle plastic weld is the selected joining method and is applied along with mechanical fasteners to the modified hull. Once joined, the hull is refilled with insulation, styrofoam, and wood to reinforce connection points and support the loads of additional external systems. This project provides a sustainable solution for shortening an existing plastic aquatic vessel while maintaining watertight seal, structural integrity, and functional viability for use in small aquatic operations.