Adhesive bonding between dissimilar materials
Typ
Examensarbete för masterexamen
Program
Publicerad
2020
Författare
Jaber, Anders
Jönsson, Frida
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
This master thesis is done at a Defense & Security Company in cooperation with
the department of Industrial and Materials Science at Chalmers University of Technology.
This thesis is an evaluation of adhesive bonds between composite to composite, and
composite to metal in different environments. The different environments are simulated
only by temperature variations to represent environmental conditions of land,
sea and air. The evaluation is done through a literature study and experimental
mechanical testing. The literature study resulted in a theoretical background that
comprises knowledge about composites, adhesive joints and surface treatments prior
to adhesive bonding.
The experimental part of the evaluation is done to determine the tensile shear
strength of a single-lap bond, with a test method similar to ISO4578. The material
combinations tested are mostly based on usability for the Defense & Security
Company, resulting in tests of glass fiber reinforced polymer (GFRP) adhered to
GFRP, GFRP adhered to aluminium and aramid fiber reinforced polymer (AFRP)
adhered to aluminium.
All test series were bonded with the adhesive film, FM 300-2M. All combinations
were tested in room temperature and at elevated temperature. GFRP to aluminium
and AFRP to aluminium were tested after pre-conditioning by temperature cycling.
Sandblasting was used as surface treatment for all the test samples. Production
of the test samples and the adhesion process were done externally at Elitkomposit
AB and the tensile shear testing was conducted at the Defense & Security Company.
When bonding GFRP to GFRP the results showed that mechanical joints could be
replaced with single-lap adhesive bonds. However, the results from the dissimilar
test series were promising as the shear strength was high, but the it varied within
each test series. Therefore, the mechanical joints can not be replaced based on these
results. Further evaluation and testing are recommended in order to replace mechanical
joints with adhesive bonds when dissimilar material are used.
Beskrivning
Ämne/nyckelord
Adhesive bonding , tensile shear testing , single-lap , adhesive bond , GFRP , AFRP , Aluminium 6082-T6 , Polymer Matrix Composite , Fiber reinforced composite , thermal cycling