Use this URL to cite or link to this record in EThOS:
Title: Crashworthiness improvements to automotive sandwich composites using tufting
Author: Hartley, Jamie W.
ISNI:       0000 0004 9347 1361
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2020
Availability of Full Text:
Access from EThOS:
Access from Institution:
With the growing demand for battery electric vehicles (BEVs), a focus within the automotive industry is ensuring vehicle performance can meet customer demands. Electric powertrains are inevitably much heavier than existing internal combustion systems, which severely limits the range of the vehicle. To compensate for this, automotive manufacturers are now looking to exploit fibre-reinforced composites (FRPs) to reduce the structural weight of the vehicle. One route to achieving this is using lightweight composite sandwich structures, which show great potential because of their good mechanical performance and low density, as well good damping properties. However, relatively poor interfacial properties render these structures unreliable when it comes to the demanding safety requirements that must be in place to protect the vehicle occupants during a crash. Through-thickness tufting has recently been demonstrated to be a promising method for reinforcing dry sandwich preforms, showing improvements in the crash performance whilst offering improvements in processability over more conventional through-thickness reinforcement methods. However, while promising results have been demonstrated there is still much to be understood of the failure behaviour of these structures, as well as the influence that design and manufacturing variables can have on this. This work aims to develop a deeper understanding in this field, to help influence and improve the future design of these structures. This is achieved using several novel experimental techniques designed to capture the behaviour of these structures at a level of detail not seen before. Testing has looked at the failure mechanics of tufted sandwich structures, as well as the influence of the tuft structure and material selection from an automotive-focused viewpoint. The output of this work proposes desired design choices and failure behaviour for high energy absorption, as well as possible design improvements for increased structural efficiency, and offering suggestions for the future direction of research.
Supervisor: Ward, Carwyn ; Partridge, Ivana Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available