zaključna naloga Univerzitetnega študijskega programa I. stopnje Strojništvo - Razvojno raziskovalni program
Urh Štempihar Jazbec (Author), Miha Brojan (Mentor)

Abstract

V zaključni nalogi obravnavamo primer, ko so deformacijska stanja troslojnega kompozitnega nosilca odvisna od snovnih in geometrijskih lastnosti ter od zaostalih napetosti v posameznih plasteh nosilca. Izpeljali smo enačbe za izračun lege nevtralne osi in velikosti radija ukrivljenosti vzdolž celotnega nosilca. Na podlagi dobljenih enačb smo zapisali programsko kodo, ki nam poda deformacijsko obliko nosilca glede na izbrane lastnosti in predpisane zaostale napetosti. V posebnem primeru, ko imamo po vsem nosilcu konstantne snovne, geometrijske in zaostale napetosti, dobimo na tem odseku upogibnico, ki ustreza krožnemu loku. Numerično dobljene oblike smo primerjali z eksperimentalno dobljenimi. Rešili smo tudi inverzni primer, pri katerem smo s pomočjo analize slike deformiranega nosilca, ob znanih materialnih in geometrijskih lastnostih, določili potek zaostalih napetosti v posameznih plasteh. Pokazali smo, da izpeljane enačbe ustrezno opišejo dejansko deformacijo nosilca.

Keywords

diplomske naloge;kompozitni nosilec;zaostale napetosti;radij ukrivljenosti;upogib;analiza slike;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FS - Faculty of Mechanical Engineering
Publisher: [U. Štempihar Jazbec]
UDC: 539.413:624.016:519.6(043.2)
COBISS: 122388995 Link will open in a new window
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Other data

Secondary language: English
Secondary title: Inhomogeneous deformation of a three-layered composite beam due to residual stresses
Secondary abstract: In the final thesis, we consider the case where the deformation states of a three-layer composite beam depend on the material and geometrical properties and on the residual stresses in the individual layers of the beam. We have derived equations that govern the position of the neutral axis and the magnitude of the radius of curvature along the entire beam. Based on the equations obtained, we wrote a computer code that gives the shape of the deformed beam according to the selected properties and the prescribed residual stresses. In a special case, when the material, geometric and residual stresses are constant throughout the beam, a shape corresponding to a circular arc is obtained. The numerically obtained shapes were compared with those obtained experimentally. We have also solved the inverse problem using image analysis of the deformed beam with known material and geometric properties and determined the residual stresses in the individual layers. We have shown that the derived equations adequately describe the actual deformation of the beam.
Secondary keywords: thesis;composite beam;residual stresses;radius of curvature;bending;image analysis;
Type (COBISS): Final paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za strojništvo
Pages: XIV, 35 f.
ID: 16391510
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