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master's thesis
Utjecaj brzine deformacije na tvrdoću materijala u procesu sabijanja u hladnom stanju
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. urn:nbn:hr:235:558114
Šokec, Josip
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Šokec, J. (2022). Utjecaj brzine deformacije na tvrdoću materijala u procesu sabijanja u hladnom stanju (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:558114

Šokec, Josip. "Utjecaj brzine deformacije na tvrdoću materijala u procesu sabijanja u hladnom stanju." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:235:558114

Šokec, Josip. "Utjecaj brzine deformacije na tvrdoću materijala u procesu sabijanja u hladnom stanju." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:235:558114

Šokec, J. (2022). 'Utjecaj brzine deformacije na tvrdoću materijala u procesu sabijanja u hladnom stanju', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:558114

Šokec J. Utjecaj brzine deformacije na tvrdoću materijala u procesu sabijanja u hladnom stanju [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2022 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:235:558114

J. Šokec, "Utjecaj brzine deformacije na tvrdoću materijala u procesu sabijanja u hladnom stanju", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:235:558114

Metadata
TitleUtjecaj brzine deformacije na tvrdoću materijala u procesu sabijanja u hladnom stanju
Title (english)Impact of deformation rate on the hardness of the material in the cold upsetting process
AuthorJosip Šokec
MentorZdenka Keran (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2022-07-21, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Production Mechanical Engineering
Abstract
U ovom radu opisano je sabijanje aluminijskih i bakrenih valjčića na hidrauličnoj preši i gravitacijskom batu, te utjecaj sabijanja (hladne plastične deformacije) na tvrdoću metalnog materijala. Opisani su osnovni principi oblikovanja metala deformiranjem kao što su temeljni zakoni deformiranja, plastično tečenje materijala i mehanizmi očvršćivanja materijala. Također naglasak je stavljen i na vrstu te brzinu gibanja dislokacija, opis smjera i dimenzija gibanja dislokacija te gustoću dislokacija. U eksperimentalnom dijelu rada sabijeni su aluminijski i bakreni valjčići prvo na gravitacijskom batu pa na hidrauličnoj preši. Sveukupno je obavljeno po 5 sabijanja valjčića radi postizanja različite visine sabijanja na svakom od strojeva. Nakon sabijanja mjerila se tvrdoća uzoraka kako bi se pokazao utjecaj stupnja deformacije na tvrdoću. Svi rezultati prikazani su tablično i grafički. S obzirom na razliku u brzini deformiranja na batu i na preši, napravljena je usporedba promjene tvrdoće materijala u ovisnosti o brzini deformiranja. Koristeći MSC Marc Mentat program napravljena je simulacija sabijanja kako bi se utvrdio raspored naprezanja i utjecaj različite brzine deformacije na raspored i iznos naprezanja pojedinog materijala. Također uspoređeni su rezultati na hidrauličnoj preši i gravitacijskom batu.
Abstract (english)
This thesis describes the compression of aluminum and copper cylinders using a hydraulic press and a gravity drop hammer, and the influence of compression (cold plastic deformation) on the hardness of the metal material. The basic principles of metal forming are described, such as basic laws of deformation, plasticity of materials and mechanisms of material hardening. Emphasis is also placed on the type and speed of dislocation movement, description of the direction and dimensions of dislocation movement and dislocation density. In the experimental part, aluminum and copper cylinders were compressed first on a gravity drop hammer, and then on a hydraulic press. A total of 5 cylinder compaction were performed in order to achieve a different compaction height on each of the machines. After compression, the hardness of the samples was measured to show the influence of the degree of deformation on hardness. All the results are presented in tables and graphs. Considering the difference in the speed of deformation on the gravity drop hammer and hydraulic press, a comparison was made of the change in hardness of the material depending on the speed of deformation. Using the MSC Marc Mentat program, a cylinder compression simulation was conducted to determine the stress distribution and the influence of different strain rates on the distribution and amount of stress of a particular material. The results on the hydraulic press and on the gravity drop hammer were also compared.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:558114
Study programmeTitle: Mechanical Engineering; specializations in: Design, Process and Energy Engineering, Production Engineering, Engineering Modelling and Computer Simulation, Marine Engineering, Industrial Engineering and Management, Materials Engineering, Mechatronics and Robotics, Autonomous Systems
Course: Production Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-07-06 11:56:17