Procjena mehaničkih svojstava zavarenoga spoja primjenom instrumentirane Charpy metode

Mandić, Davor

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doctoral thesis

Procjena mehaničkih svojstava zavarenoga spoja primjenom instrumentirane Charpy metode

Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2019. urn:nbn:hr:235:652529

Mandić, Davor

University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

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APA 6th Edition

Mandić, D. (2019). Procjena mehaničkih svojstava zavarenoga spoja primjenom instrumentirane Charpy metode (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:652529

MLA 8th Edition

Mandić, Davor. "Procjena mehaničkih svojstava zavarenoga spoja primjenom instrumentirane Charpy metode." Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2019. https://urn.nsk.hr/urn:nbn:hr:235:652529

Chicago 17th Edition

Harvard

Mandić, D. (2019). 'Procjena mehaničkih svojstava zavarenoga spoja primjenom instrumentirane Charpy metode', Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 01 October 2023, https://urn.nsk.hr/urn:nbn:hr:235:652529

Vancouver

Mandić D. Procjena mehaničkih svojstava zavarenoga spoja primjenom instrumentirane Charpy metode [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2019 [cited 2023 October 01] Available at: https://urn.nsk.hr/urn:nbn:hr:235:652529

IEEE

D. Mandić, "Procjena mehaničkih svojstava zavarenoga spoja primjenom instrumentirane Charpy metode", Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:235:652529

Cite this item: https://urn.nsk.hr/urn:nbn:hr:235:652529

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Title	Procjena mehaničkih svojstava zavarenoga spoja primjenom instrumentirane Charpy metode
Title (english)	Evaluation of welded joint mechanical properties by instrumented Charpy method
Author	Davor Mandić
Mentor	Željko Alar (mentor)
Committee member	Ivica Garašić (predsjednik povjerenstva)
Committee member	Željko Alar (član povjerenstva)
Committee member	Dario Iljkić (član povjerenstva)
Granter	University of Zagreb Faculty of Mechanical Engineering and Naval Architecture Zagreb
Defense date and country	2019-06-14, Croatia
Scientific / art field, discipline and subdiscipline	TECHNICAL SCIENCES Mechanical Engineering
Universal decimal classification (UDC)	621 - Mechanical engineering. Nuclear technology. Machinery
Abstract	Najpoznatija metoda za određivanje udarnog rada loma te procjenu ponašanja materijala u uvjetima udarnog opterećenja je Charpyjeva metoda. U ovom znanstveno-istraživačkom radu uspoređeni su rezultati ispitivanja dobiveni pomoću instrumentirane Charpy metode s rezultatima dobivenim statičkim vlačnim ispitivanjem u svrhu procjene prihvatljivosti rezultata ispitivanja instrumentiranom Charpy metodom kod zavarenih spojeva. Tu se prije svega misli na karakteristične sile (sila pri granici razvlačenja i maksimalna sila) te naprezanju pri granici razvlačenja i naprezanju pri maksimalnoj sili. U svrhu ispitivanja uzorci za Charpyjevu i statičku vlačnu metodu izrađeni su iz osnovnog materijala, metala zavara i zone utjecaja topline. Iz dijagrama sila-vrijeme i sila-pomak, dobivenih instrumentiranom Charpy metodom, određene su vrijednosti karakterističnih sila i dinamičkih čvrstoća pri istim silama. Norma za instrumentiranu Charpy metodu daje samo okvirne naputke na koji način odrediti vrijednosti karakterističnih sila, stoga se je prišlo pronalaženju nove metode njihove procjene koja je korištena u ovom radu. U svrhu proračuna dinamičke čvrstoće pri granici razvlačenja i dinamičke lomne žilavosti koristile su se poznate metode, dok je za proračun vrijednosti dinamičke vlačne čvrstoće korištena nova metoda procjene. Rezultati ispitivanja pokazali su dobru korelaciju između rezultata dobivenih instrumentiranom Charpyjevom metodom i rezultata dobivenih statičkim vlačnim pokusom što otvara mogućnost za daljnja istraživanja na tom području.
Abstract (english)	The best known method for determining absorbed energy and evaluation of material behaviour under the impact conditions is Charpy impact test. In this research results of the mechanical properties obtained from instrumented Charpy method were compared with results obtained from static tensile test. The purpose is to evaluate the acceptability of the results obtained from the instrumented Charpy method of welded joints. Yield force, maximum force, dynamic yield strength and dynamic tensile strength are in the main focus of this work. Samples for instrumented Charpy method and for static tensile test are machined from the base material, weld metal and head affected zone. Yield and maximum forces, as well as the dynamic strengths at the stated forces were estimated from the force-time diagram and force-displacement diagram obtained from instrumented Charpy method. Standard for instrumented Charpy method gives only the general guide how to estimate values of the stated forces, hence the new method for its estimation is introduced. To estimate the dynamic yield strength and dynamic fracture toughness, common methods were used. New method was introduced to estimate dynamic tensile strength. Test results show good correlation between results given by instrumented Charpy method and results given by static tensile test which opens the possibility for further researches.
Keywords
Keywords (english)
Language	croatian
URN:NBN	urn:nbn:hr:235:652529
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
Terms of use
Repository	Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb
Created on	2019-09-25 09:59:38