4D printed actuators transform energy into mechanical motion in response to specific stimuli. They are employed to conduct a range of unique tasks such as self-assembling, and conceive compact systems with a low manufacturing and maintenance costs. Previous investigations by our research group have focused on the development of novel multifunctional soft polymers with an integrated electro-thermo-mechanical control system, providing a platform for embedded artificial intelligence motors. This technology may not be suitable to meet the high loading requirements of the space sector, particularly in cases where heavy-duty robots and the deployment of large structures subjected to high torques are necessary. This limitation arises from the inherent trade-off between compliance and stiffness in traditional structural materials. Shape-changing objects require a certain level of compliance to undergo large rotations and deformations, which is often at odds with the requirements for structural integrity and load-bearing capabilities.
Aim and Objectives of the proposed PhD thesis:
This project aims to develop a fully instrumented 4D printed multifunctional composite actuator with improved loading capacity able to tailor its deformation autonomously. The actuator will be part of a close-loop control framework including: (i) a 3D printed embedded sensors, (ii) an electro-thermal 3D printed multifunctional composite actuator, and (iii) an integrated controller. We hypothesise that a novel hybrid actuator based on polymer/ unidirectional fibre composites layers will have superior load-carrying capacity at room temperature, while providing the necessary compliance when increasing the temperature during actuation.
The project entails three partial objectives:
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Objective 1. |
Manufacturing, instrumentation, verification and validation of 4D printed composite actuators. |
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Objective 2. |
Development of a force-intensity-temperature-deformation close loop autonomous controller, including modelling by Finite Element Analysis. |
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Objective 3. |
Development of prototypes, including deployable structures. Analysis of recovery rate, reversibility and performance. |
Acquired skills
The PhD student will have the opportunity to extent his knowledge in multifunctional materials, additive manufacturing, electro-thermo-mechanical testing, instrumentation & control, non-linear mechanics and computational mechanics. Multiple opportunities to develop soft skills and conduct scientific networking will be offered.
Informal inquiries can be made to:
Further Information:
The University of Edinburgh is committed to equality of opportunity for all its staff and students, and promotes a culture of inclusivity. Please see details here: https://www.ed.ac.uk/equality-diversity
Closing Date:
Principal Supervisor:
Eligibility:
Minimum entry qualification - an Honours degree at 2:1 or above (or International equivalent) in a relevant science or engineering discipline, possibly supported by an MSc Degree. Further information on English language requirements for EU/Overseas applicants.
Funding:
Applications are welcomed from self-funded students, or students who are applying for scholarships from the University of Edinburgh or elsewhere.
