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Thesis for the Degree of Licentiate of Engineering
| Content Provider | Semantic Scholar |
|---|---|
| Author | Biel, Anders Stigh, Ulf |
| Copyright Year | 2013 |
| Abstract | The influence of the temperature on the cohesive laws for an epoxy adhesive is studied in the glassy region, i.e. below the glass transition temperature. Cohesive laws are measured in both Mode I and Mode II under quasi-static loading conditions in the temperature range −30 ≤ ≤ 80C. Three parameters of the cohesive laws are studied in detail; the elastic stiffness, the peak stress and the fracture energy. Methods for determining the elastic stiffness in Mode I and Mode II are derived and evaluated. Simplified bi-linear cohesive laws to be used at any temperature within the studied temperature range are derived for each loading mode. All parameters of the cohesive laws are measured experimentally using only two types of specimens. It is shown that most parameters are decreasing with an increasing temperature in both loading modes. The exception is the Mode I fracture energy which is shown to be independent of the temperature. The Mode II fracture energy is continuously decreasing with an increasing temperature. At 80°C the fracture energy is decreased to about 2/3 of the fracture energy at -30°C. The experimental results are verified by finite element analyses. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.his.se/PageFiles/4666/Cohesive_modelling_of_temperature_dependence_of_epoxy_based_adhesives_in_Mode_I_and_Mode_II_loading.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
