Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496024
Title: High strain rate modelling of adhesive bonded joints (especially in automobiles)
Author: Clarke, Matthew
Awarding Body: Oxford Brookes University
Current Institution: Oxford Brookes University
Date of Award: 2008
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Abstract:
The behaviour of single lap joints under conditions of varying strain rate was studied. The joints were formed with aluminium adherends of varying thickness to investigate interactions between adherend yield and joint failure. This allowed an assessment to be made as to when the strain rate had a significant effect on the behaviour of the joints. The validity of the results and an understanding of the influence of strain rate was confirmed by carrying out tests and simulation of two adhesive bonded aluminium structures. These were chosen to be representative of an assembly in a vehicle structure. The accuracy of the characterisation of the adhesive was confirmed by loading of T-shaped specimens. Crush tube specimens were tested to confirm the capability to simulate high strain loading of a bonded structure using the methods developed. It was found that it is practical to use LS-Dyna for simulating dynamic loading of an adhesive bonded structure. A novel contribution has therefore been made to improve understanding of how bonded joints are affected by the rate of loading. This showed that adherend yield influences significantly the failure of bonded joints in certain joint configurations. In such configurations, the strain rate sensitivity of the joint system is governed by the strain rate sensitivity of the adherend material. This finding leads to the conclusion that it is possible to use adhesive materials data from quasi-static tests in simulations of dynamic loading of bonded structures. These findings were confirmed through testing and simulation of two representative bonded structures.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.496024  DOI: Not available
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