Elasto-plastični proračun maksimalne dopuštene nosivosti okvira kontejnerske cisterne

undergraduate thesis

• Title (english): Elasto-plastic limit load calculation of storage tank frame
• Author: Božidar Jolić
• Mentor: Tomislav Jarak (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2019-03-01, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U ovom završnom radu proveden je elasto-plastični proračun maksimalne dopuštene nosivosti okvira kontejnerske cisterne. Proračuni su provedeni numerički pomoću programskog paketa Abaqus.
Prvo je dan kratki opis metoda teorije plastičnosti korištenih u ovom radu te njenu zadaću u analizi opterećivanja konstrukcija. Za proračun konstrukcija u našem slučaju koristili smo elastično idealno-plastično ponašanje materijala. U sljedećem poglavlju opisana je plastična analiza konstrukcija pomoću pristupa krutog plastičnog zgloba, zatim elasto-plastičnog zgloba te pristupa širenja plastičnih područja. Nakon toga opisali smo metodu konačnih elemenata te korištene konačne elemente u ovom radu, a to su okvirni konačni elementi. Ukratko smo objasnili i princip na koji način programski paket Abaqus rješava zadane probleme. Nakon toga provedena je verifikacija korištenih numeričkih metoda na jednostavnim primjerima kako bi utvrdili ispravnost odabranog konačnog elementa te dokazali ispravnost provedene analize u smislu poklapanja analitičkih rješenja sa numeričkim.
Nakon verifikacije provedena je elasto-plastična analiza deformacija, naprezanja i pomaka u prostornoj okvirnoj konstrukciji pomoću trodimenzijskih grednih i okvirnih konačnih elemenata.

Abstract (english)

In this work, an elasto-plastic calculation of the maximum permissible load capacity of the container tank frame has been performed. Calculations were executed in a numerical way by using the program package Abaqus.
Firstly, a short review of some basic approaches of theory of plasticity there were used in this work is given, and the application of the theory of plasticity in the structural analysis is explained. For the calculations, we used the elastic ideal plastic material behaviour. The next section describes elasto-plastic analyses by adopting the assumptions about the rigid plastic hinge, the elasto-plastic hinge and the method of expansion of plastic zones inside the material. Subsequently, we described the Finite element Method as well as the frame elements used in the work. We have briefly explained the principles how the Abaqus software package solves the problems.Afterwards, the verification on simple examples has been performed to determine the correctness of the selected finite elements and to prove the validity of the chosen analysis methods. The numerical solutions were compared to the relevant analytical solutions.
Finally, the elasto-plastic analysis of strains, stresses and displacements in a spatial three-dimensional frame construction is presented, executed by using three-dimensional beam and frame finite elements.

• Keywords: granično opterećenje; plastične deformacije; plastični zglobovi; okvirni elementi; metoda konačnih elemenata; Abaqus
• Keywords (english): limit load; plastic strains; plastic hinges; frame elements; finite element method; Abaqus
• Language: croatian
• URN:NBN: urn:nbn:hr:235:511270
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-05-23 00:01:34