Naslov
Influence of the Stress Rate on the Results of Tensile Testing

Autori
Ćorić, Danko ; Sakoman, Matija ; Dragojević, Roman

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Book of Abstracts and Conference Proceedings on USB of 20th International Conference on Materials, Tribology, Recycling, MATRIB 2019 / Šolić, Sanja ; Schauperl, Zdravko ; Pugar, Daniel - Zagreb : Hrvatsko društvo za materijale i tribologiju (HDMT), 2019, 119-126

Skup
20th International Conference on Materials (MATRIB 2019)

Mjesto i datum
Vela Luka, Hrvatska, 27.06.2019. - 29.06.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
tensile testing, stress rate, strain rate, mechanical properties, aluminium

Sažetak
In this paper the influence of testing rates on the results of tensile test was investigated. At different stress rates in the range of 2 to 100 MPas-1, the values of proof strength, tensile strength and percentage elongation after fracture have been determined. Tests shown a significant influence on the testing rate on the values of the measured properties. At higher testing rates, the value of the proof strength and tensile strength increases as the material ductility decreases. Increase in stress rate causes an increase in strain rate during elongation of the test piece on the testing machine, which induces higher material strengthening by cold working (strain hardening) mechanism that is reflected in the increase in mechanical characteristics. The correlation between the tested properties in relation to the testing rate has been successfully determined through the conducted tests. The test results indicate that elastic materials such as aluminum, characterized by more pronounced deformation increase during elongation on the testing machine must be examined at lower stress rates, due to lower influence of strain hardening.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA