Numeričko modeliranje procesa deformiranja kompozitne sendvič strukture

undergraduate thesis

• Title (english): Numerical modelling of a composite sandwich structure deformation process
• Author: Ivan Radoš
• Mentor: Zdenko Tonković (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

U ovom radu prikazano je numeričko modeliranje i računalna simulacija procesa deformiranja sendvič konstrukcije za slučaj savijanja u tri točke. Sendvič konstrukcija sastoji se od tankih aluminijskih limova koji čine ljusku te aluminijske saće koje predstavlja jezgru sendvič konstrukcije. U numeričkoj analizi jezgra je opisana na 3 načina: homogenizirani model aluminijskih saća u kojem su određene konstante krutosti u odnosu na geometriju i materijal ćelije prema literaturi [10], homogenizirani model aluminijskih saća u kojem su konstante krutosti preuzete od proizvođača te model stvarne konstrukcije ćelije aluminijskih saća. Rezultati su prikazani u obliku dijagrama sila-pomak te su izračunate vrijednosti krutosti i savojnog modula elastičnosti. U svrhu validacije numeričkih modela proizvedeni su uzorci sendvič konstrukcije te je naknadno provedeno ispitivanje uzoraka kod savijanja u tri točke. Rezultati numeričkih modela i testiranih uzoraka su uspoređeni.

Abstract (english)

This thesis presents numerical modelling and computer simulation of the sandwich structure deformation process in a three-point bend test. The sandwich structure consists of thin aluminium sheets that form a skin and aluminium honeycomb that represents the core of the sandwich structure. In the numerical analysis, the core is described in 3 ways: a homogenized model of aluminium honeycombs in which stiffness constants are determined in relation to the geometry and cell material according to the literature [10], a homogenized model of aluminium honeycombs in which stiffness constants are taken from manufacturers and the actual model of the aluminium honeycomb cell. The results are presented in the form of a force-displacement diagram and the calculated values of the stiffness and the flexural modulus of elasticity. For the purpose of validation of numerical models, samples of sandwich construction were produced and subsequent testing of samples in three-point bend test was performed. The results of the numerical models and the tested samples were compared.

• Keywords: sendvič konstrukcija; jezgra; aluminijske saće; test savijanja u tri točke; homogenizirani model; numerička analiza
• Keywords (english): sandwich structure; core; aluminium honeycombs; three-point bend test; homogenized model; numerical analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:235:997126
• Study programme: Title: Mechanical Engineering; specializations in: Design, Process and Energy Engineering, Production Engineering, Engineering Modelling and Computer Simulation, Marine Engineering, Industrial Engineering and Management, Materials Engineering; Course: Design; 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: 2021-09-24 10:38:51