Thesis-2000-Aziz.pdf (11.64 MB)
The influence of thermohumid conditions on compression-after-impact properties of fibre-reinforced laminate materials
thesis
posted on 2018-07-20, 14:20 authored by Roslan A. AzizAdvance composite materials based mainly on epoxy resins are being used
in increasing amounts in aerospace components due to their high strength:weight
ratio. Such components have to survive in a range of temperature and humid
environments in different parts of the world. The current generation of epoxy resins
used in high performance fibre reinforced laminates absorb moisture from the
atmosphere. Moisture absorption by the epoxy resins leads to a reduction in glass
transition temperature and to a softening of the resin with a loss of resin stiffness
and strength.
In certain applications the components have to survive low impacts from
dropped tools and rough handling during maintenance. Low energy impacts of this
nature are considered potentially dangerous mainly because the damage might be
left undetected. Even where no visible impact damage is observed at the surface,
matrix cracking and interlaminar failure can occur, and the load carrying properties
of the composite components is considerably reduced.
A compression after impact (CAI) test is widely used in industry as the major
screening parameters for materials selection. The aim of the work reported in this
thesis was to determine the influence of thermohumid conditions on CAI properties
and to assess the degradation behaviour of composite laminates under these
thermohumid conditions. [Continues.]
Funding
Malaysia, Government.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Publisher
© Roslan Abd AzizPublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2000Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.Language
- en