The research of the influence of moisture on the fracture characteristics of polymers with an emphasis on the comparison with influence of temperature is presented in the Master Thesis. Of the main interest has been the influence on the following parameters that indicate the ductile-brittle transition under the impact loading: indicated total work to fracture, indicated elongation at fracture and indicated maximal force during the test. Test specimens made of a particular polyamide (PA-6.6) have been tested in the as delivered and in the different moistened states. The results confirm the analogy between the influence of moisture and the influence of temperature in the case of large deformations and dynamic loading, including the ductile-brittle transition. This indirectly confirms correctness of the free volume theory.

V disertaciji je obravnavan upogib enoosnih konstrukcijskih elementov iz materiala z oblikovnim spominom. Raziskava je osredotočena na modeliranje upogiba v področju superelastičnosti, ki je ena od posebnih lastnosti materialov z oblikovnim spominom. Izdelan in predstavljen je model, na osnovi katerega je bil izdelan računalniški program za numerično modeliranje napetostno-deformacijskega stanja v osno in upogibno obremenjenem konstrukcijskem elementu iz materiala z oblikovnim spominom v področju superelastičnosti. Model je preverjen eksperimentalno z nateznimi in upogibnimi preizkusi na vzorcih iz zlitine NiTi in CuZnAl.