Fracture toughness of an epoxy system
| العنوان: | Fracture toughness of an epoxy system |
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| المؤلفون: | S. Mostovoy, E. J. Ripling |
| المصدر: | Journal of Applied Polymer Science. 10:1351-1371 |
| بيانات النشر: | Wiley, 1966. |
| سنة النشر: | 1966 |
| مصطلحات موضوعية: | Toughness, Specific modulus, Materials science, Polymers and Plastics, Young's modulus, General Chemistry, Epoxy, Surfaces, Coatings and Films, Cracking, symbols.namesake, Fracture toughness, visual_art, Materials Chemistry, symbols, visual_art.visual_art_medium, Adhesive, Composite material, Joint (geology) |
| الوصف: | The fracture toughness of epoxy used in the bulk and adhesive form was measured by a previously developed technique. The uniform double cantilever-beam specimen, which was described earlier, was modified to a tapered beam, which simplified the experimental procedure and calculations for obtaining toughness measurements. by varying the ratio of hardener to resin and post-cure temperature on a single epoxy system (DER 332-TEPA), it was found that the toughness of the epoxy used in either bulk or bond form varied by a factor of approximately five. A particular combination of composition and post-curing temperature generally yielded higher toughness in the bulk than in the bond form. This was not always the case, however. At high post-cure temperatures, where the bonds were very tough, their toughness exceeded that of the bulk material. Hence, it does not appear possible to predict joint toughness from bulk toughness measurements. The toughness of joints was found to be a single-valued function of tensile modulus. For the bulk material, on the other hand, the toughness obtained on the epoxy having a specific modulus depended on the combination of composition and post-cure temperature. Joint toughness for any combination of composition and post-cure temperature depended only on the cracking rate. If the epoxy was the type that caused cracks to jump rapidly, the epoxy was tough and vice versa. For a particular epoxy system, toughness was increased by driving the crack at an increasing rate. |
| تدمد: | 1097-4628 0021-8995 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::c3850a1492da9fbc3b11715abb2055a4 https://doi.org/10.1002/app.1966.070100913 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........c3850a1492da9fbc3b11715abb2055a4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10974628 00218995 |
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