Životni vijek kompozitnog kliznog ležaja

doctoral thesis

• Title (english): Life time of composite bearing
• Author: Branko Katana
• Mentor: Milan Opalić (mentor)
• Committee member: Mladen Šercer (predsjednik povjerenstva)
• Committee member: Milan Opalić (član povjerenstva)
• Committee member: Dragan Žeželj (član povjerenstva)
• Committee member: Krešimir Grilec (član povjerenstva)
• Committee member: Milan Kljajin (član povjerenstva)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2017-06-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)
• Universal decimal classification (UDC): 621 - Mechanical engineering. Nuclear technology. Machinery ; 620 - Materials testing. Power stations. Economics of energy

Abstract

Razvojem novih materijala na osnovi polimera, s određenim mehaničkim i tribološkim svojstvima, dolazi do postupnog smanjenja primjene materijala na osnovi metala. Značajan razvoj dogodio se u području kompozitnih materijala, koji se često primjenjuju u svim granama industrije. Predmet rada je usporedba triboloških svojstava kompozitnih materijala s tradicionalnim metalnim materijalima u funkciji kliznog ležaja. Kompozitni ležajni materijali pripadaju skupini nelinearno elastičnih materijala, kod kojih krivulja opterećenja i rasterećenja u dijagramu naprezanje – deformacija nije polinom prvog stupnja. Strukturu kompozitnih materijala čine matrica kao što je npr. matrica od PTFE-a (politetrafloretilen) ili poliestera te ojačalo, koje povezano čine kompozit. Kompleksnost strukture kompozitnih materijala zahtjevno je opisati matematičkim modelima što otežava proračun predviđenog radnog vijeka u funkciji vremena i opterećenja. S ciljem postizanja točnijih vrijednosti predviđenog radnog vijeka kompozitnih ležajnih materijala potrebno je provesti eksperimentalno istraživanje. Rezultate eksperimentalnog mjerenja moguće je usporediti s vrijednostima dobivenim proračunom ili MKE (metoda konačnih elemenata) analizom. U okviru doktorskog rada provest će se istraživanje operetivosti kompozitnih ležajnih materijala.

Abstract (english)

Development of new materials based on a polymers with certain mechanical and tribological properties, leading to a gradual reduction of materials on the metal base. A significant development occurred in the field of composite materials, which are widely used in all branches of industry. The subject of this paper is to compare the tribological properties of composite materials with traditional materials based on metal in function as slide bearing. Composite bearing materials belong to the group of non-linear materials, in which the loading and unloading curve in the stress - strain diagram is not a polynomial of the first degree. The structure of the composite material consists of fabric such as PTFE (polytetrafluoroethylene) and polyester resin, which connects matrix composites in the finish product. The complexity of the composite structure is challenge to describe as mathematical model which makes it difficult for calculation of planned service life in terms of time and work load. To achieve more accurate value of the estimated working life time of the composite bearing material is necessary to conduct experimental research. The results of experimental measurements can be compared with those obtained by calculation or FEM (Finite Element Method) analysis. As part of the doctoral thesis will be carried out research of load on bearing composite material.

• Keywords: kompozitni materijali; klizni ležaj; granica opteretivosti
• Keywords (english): composite materials; slide bearing; load capacity
• Language: croatian
• URN:NBN: urn:nbn:hr:235:877497
• Study programme: Title: Mechanical Engineering and Naval Architecture; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje tehničkih znanosti (doktor/doktorica znanosti, područje tehničkih znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-04-09 22:24:44