Project 2- Markforged 3D printer
The overarching aim of this project is to develop a high negative passion ratio (Auxetic structures) 3d printed continuous fibre-reinforced composite auxetic structures.
Auxetic structures are an emerging class of cellular structures with negative Poisson’s ratio, which have a wide range of advantageous properties such as energy absorption, increased shear stiffness, and increased plane strain fracture toughness. Applications spanning various areas of everyday life. Such applications can be found in, for example, smart fasteners, filters, armouring, and many others. These examples cover only a small number of the possible applications of auxetic structures, which shows potential in numerous other applications. 3D printing of continuous fibre-reinforced thermoplastic composites (CFRTPCs) is a new manufacturing method that is capable of fabricating continuous fibre composites through in-nozzle impregnation of continuous fibre, and thermoplastic matrix was developed, which can be produced by Markforged 3D printer at our lab. This project aims to design, manufacture, and test high negative passion ratio 3d printed continuous fibre-reinforced composite auxetic structures. To achieve the project aim, the following tasks or objectives are required to complete
Identify the auxetic structure that can achieve (a high negative Poisson ratio, high deformation, fibre printed pass is compatible with the shape)
Design the CAD model and identify the geometrical parameters
Print tensile test samples
FEA analysis using materials properties of the tensile samples. ( optimisation of the shape)
3D print the samples and validation with the simulation
SEM analysis of the broken samples
|EQUIPMENT & RESOURCES INVOLVED
Markforged 3D printer
CAD software(inventor, Anysis)
Other resources and equipment: filaments (Nylon, CFRP, GFRC, Kevlar)
|BRIEF DESCRIPTION OF WORK
The project will start with initial literature-based research, which will help you have an understanding of the different aspects of the project, such as auxetic structures and 3D printing. This literature research may also help you identify and develop experimental methods that you will use later in your project. You will need to identify the type of auxetic structure you will design and what materials you are going to use. On the other hand, you will identify possible fibre composite materials and characterise their mechanical properties. Next, you will design and optimise the auxetic structure and predict the passion ratio. The optimum ones will be validated using the Instron machine to investigate the failure, deformation, stress-strain, young modules, etc. SEM analysis will be carried out to check the failure mechanics, broken fibres, etc.
|WOULD SUIT STUDENTS WITH A SPECIAL INTEREST/EXPERTISE IN:
This project would suit creative students who enjoy both experimental and design work, especially those with interest in one or more of the following:
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