Adhesive joints on glass fiber vinyl ester lamina
Maden Limbu, Babish (2018)
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Lataukset:
Maden Limbu, Babish
Yrkeshögskolan Arcada
2018
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2018060512585
https://urn.fi/URN:NBN:fi:amk-2018060512585
Tiivistelmä
Thesis motive is to experimentally analyse adhesive joint strength and adhesive bonding on glass fiber vinyl ester laminate through 3 point bending test and peel test. Study also shows adhesive joint strength as a function of scarf angle, adhesives, adhesives mixed with additives, initial surface treatment and peel strength.
Procedure is structured by ISO and ASTM’s surface preperation, 3 point bending and peel test standards.
Glass fiber vinyl ester laminate is sanded on sanding machine with 120 gird sandpaper on various angles and bonded with WS 105 Epoxy, polyester, vinyl ester, loctite 435 with cellulose, silica and 3 other additives as adhesive. Cured samples are re-sanded to its initial shape. Maximum force data and peel strength data is collected and analyzed.
Scarf joint theory as a function of angle is proven to be true by this study. From stress data, it is observed that WS 105 Epoxy is stronger adhesive bonding resin than polyester, vinyl ester and loctite 435. Cellulose and silica additive increases bonding strength and viscosity while phenol microballs, microballs SG and glass fiber paste only increased viscosity. Adhesive joint strength at 86° degree scarf angle with cellulose and silica additive mixed with Epoxy was able to create cohesive failure of adherent achieving 30,87% of laminate’s original strength. Tapered end on scarf joint edge is necessary to prevent peeling stress thus proving Volkersen and Klein theory of adhesive joint strength due to bond line thickness on adhesive joints. Cellulose additive increases peel resistance.
Procedure is structured by ISO and ASTM’s surface preperation, 3 point bending and peel test standards.
Glass fiber vinyl ester laminate is sanded on sanding machine with 120 gird sandpaper on various angles and bonded with WS 105 Epoxy, polyester, vinyl ester, loctite 435 with cellulose, silica and 3 other additives as adhesive. Cured samples are re-sanded to its initial shape. Maximum force data and peel strength data is collected and analyzed.
Scarf joint theory as a function of angle is proven to be true by this study. From stress data, it is observed that WS 105 Epoxy is stronger adhesive bonding resin than polyester, vinyl ester and loctite 435. Cellulose and silica additive increases bonding strength and viscosity while phenol microballs, microballs SG and glass fiber paste only increased viscosity. Adhesive joint strength at 86° degree scarf angle with cellulose and silica additive mixed with Epoxy was able to create cohesive failure of adherent achieving 30,87% of laminate’s original strength. Tapered end on scarf joint edge is necessary to prevent peeling stress thus proving Volkersen and Klein theory of adhesive joint strength due to bond line thickness on adhesive joints. Cellulose additive increases peel resistance.