Numeričko modeliranje udarnih oštećenja kompozitne motociklističke kacige

master's thesis

• Title (english): Numerical modelling of composite motorcycle helmet impact damage
• Author: Kristina Dumančić
• Mentor: Darko Ivančević (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-12-17, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

U ovome radu provedena je analiza udarnih opterećenja motociklističke kacige pomoću metode konačnih elemenata u programskom paketu Abaqus/Explicit.
U prvom poglavlju opisane su neke opće karakteristike koje se vežu za motociklističke kacige.
U drugom poglavlju navedena je ukratko povijest kaciga, kakvi tipovi kaciga postoje na tržištu, navedene su glavne komponente svake motociklističke kacige te su navedeni neki od materijala za izradu. Trećim poglavljem opisani su sigurnosni standardi za ispitivanje kaciga, opisana su ispitivanja koja standardi zahtijevaju te su prikazane usporedbe četiri najčešća standarda. Četvrtim poglavljem opisana je anatomija glave, navedene su glavne karakteristike i dijelovi lubanje i mozga te su prikazane neke od vrsta ozljeda prouzrokovanih udarnim opterećenjem. Peto i šesto poglavlje sadrži numerički model glave i same kacige. Navedene su sve korištene karakteristike, materijali te parametri za provedbu simulacija. U sedmom poglavlju dan je kraći opis međuslojnih oštećenja, odnosno delaminacija uz detaljnije objašnjen Virtual Crack Closure Technique (VCCT) kriterij. Osmim poglavljem prikazani su svi dobiveni rezultati provedenih simulacija te osvrti na iste, te posljednjim devetim poglavljem donesen je zaključak temeljen na dobivenim i prikazanim rezultatima.

Abstract (english)

The subject of this thesis is to perform a stress analysis of a motorcycle helmet under impact load using the finite element analysis offered in a software Abaqus/Explicit.
Chapter one describes general characteristics of a typical motorcycle helmet. Chapter two describes the history of helmets, the types of helmets available on market today and about main components and materials used to produce them. Safety standards for tests, tests themselves and standard comparisons are all shown in chapter three. Chapter four deals with the anatomy of a human head, specifically those of a skull and a brain and it also explains some of the more common injuries caused by impact load. Chapters five and six describe numerical models of a head and a helmet. All the characteristics, materials and parameters required for simulations are listed as well. Chapter seven provides a brief description of delamination, with a detailed description of the VCCT criterion. Chapter eight shows all the results acquired via simulations and explanations thereof. Chapter nine is essentially a conclusion based on aforementioned results.

• Keywords: motociklistička kaciga; numeričko modeliranje udara; kohezivna zona; kohezivni elementi; delaminacija; kriteriji popuštanja
• Keywords (english): motorcycle helmet; numerical modelling of damage; cohesive zone model; cohesive elements; delamination; failure criterion
• Language: croatian
• URN:NBN: urn:nbn:hr:235:899976
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-12-02 11:09:08