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undergraduate thesis
Teorijska i eksperimentalna analiza izvijanja ekscentrično opterećenih štapova
2022. urn:nbn:hr:157:021177
Matković, Luka
University of Rijeka
Faculty of Civil Engineering
Department of Load Bearing Structures and Technical Mechanics
Chair of Technical Mechanics

Cite this document

Matković, L. (2022). Teorijska i eksperimentalna analiza izvijanja ekscentrično opterećenih štapova (Undergraduate thesis). Rijeka: University of Rijeka, Faculty of Civil Engineering. Retrieved from https://urn.nsk.hr/urn:nbn:hr:157:021177

Matković, Luka. "Teorijska i eksperimentalna analiza izvijanja ekscentrično opterećenih štapova." Undergraduate thesis, University of Rijeka, Faculty of Civil Engineering, 2022. https://urn.nsk.hr/urn:nbn:hr:157:021177

Matković, Luka. "Teorijska i eksperimentalna analiza izvijanja ekscentrično opterećenih štapova." Undergraduate thesis, University of Rijeka, Faculty of Civil Engineering, 2022. https://urn.nsk.hr/urn:nbn:hr:157:021177

Matković, L. (2022). 'Teorijska i eksperimentalna analiza izvijanja ekscentrično opterećenih štapova', Undergraduate thesis, University of Rijeka, Faculty of Civil Engineering, accessed 08 May 2024, https://urn.nsk.hr/urn:nbn:hr:157:021177

Matković L. Teorijska i eksperimentalna analiza izvijanja ekscentrično opterećenih štapova [Undergraduate thesis]. Rijeka: University of Rijeka, Faculty of Civil Engineering; 2022 [cited 2024 May 08] Available at: https://urn.nsk.hr/urn:nbn:hr:157:021177

L. Matković, "Teorijska i eksperimentalna analiza izvijanja ekscentrično opterećenih štapova", Undergraduate thesis, University of Rijeka, Faculty of Civil Engineering, Rijeka, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:157:021177

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Metadata
TitleTeorijska i eksperimentalna analiza izvijanja ekscentrično opterećenih štapova
Title (english)Theoretical and Experimental Analysis of Buckling of Eccentrically Loaded Rods
AuthorLuka Matković
MentorLeo Škec (mentor)
Committee memberLeo Škec (predsjednik povjerenstva)
GranterUniversity of Rijeka
Faculty of Civil Engineering
(Department of Load Bearing Structures and Technical Mechanics)
(Chair of Technical Mechanics)
Rijeka
Defense date and country2022-09-09, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Basic Technical Sciences
Technical Mechanics (Mechanics of Rigid and Deformable Bodies)
Abstract
Poznato je da se ravni vitki konstrukcijski elementi pri određenoj tlačnoj uzdužnoj sili počinju izvijati. Ta sila se naziva Eulerova kritična sila izvijanja. Dostizanjem te sile element gubi stabilnost, što znači da, osim ako se tlačno osno opterećenje ne ukloni, nepovratno gubi svoj početni ravni položaj i poprima savinuti oblik. Ukoliko je element opterećen ekscentričnom tlačnom silom (čije je hvatište izvan težišta poprečnog presjeka), takva sila dodatno uzrokuje momente savijanja pa izvijanje nastaje prije postizanja Eulerove kritične sile. U ovom radu su izvedeni teorijski izrazi za Eulerovu kritičnu silu štapa zglobno oslonjenog na oba kraja te izrazi za progib, maksimalni moment savijanja i maksimalno naprezanje kada je takav štap opterećen ekscentričnom tlačnom silom. Zatim je laboratorijskim ispitivanjima provjerena njihova točnost. Zaključeno je da teorijski model zadovoljavajuće predviđa ponašanje tlačno opterećenih štapova, ali se u stvarnosti, zbog različitih nesavršenosti, štapovi se pri istoj sili deformiraju više, a Eulerova kritična sila se nikada ne dosegne.
Abstract (english)
It is well known that slender structural elements buckle at a certain compressive axial force. This force is called Euler's critical buckling force. When this force is reached, the element loses its stability, which means that, unless the compressive axial load is removed, it irreversibly loses its initial straight configuration and becomes bent. If an element is loaded by an eccentric compressive force (whose point of application is outside the centroid of the cross section), such a force additionally creates bending moments so that buckling takes place before reaching the Euler’s critical force. In this work theoretical expressions for Euler’s critical force have been derived for a rod with pinned supports at both ends, as well as expressions for the deflections, maximal bending moment and maximum stress in the case where such a rod is loaded by an eccentric compressive force. Subsequently, the accuracy of those expressions has been assessed. It was concluded that the theoretical model’s prediction of the behaviour of the compressive rods is satisfactory, but in reality, due to different imperfections, at the same force, rods deform more and the Euler’s critical load is never reached.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:157:021177
Study programmeTitle: Civil Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka građevinarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka građevinarstva)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
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Created on2022-10-03 11:06:24