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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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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

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

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

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 25 April 2024, https://urn.nsk.hr/urn:nbn:hr:235:652529

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 2024 April 25] Available at: https://urn.nsk.hr/urn:nbn:hr:235:652529

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

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TitleProcjena mehaničkih svojstava zavarenoga spoja primjenom instrumentirane Charpy metode
Title (english)Evaluation of welded joint mechanical properties by instrumented Charpy method
AuthorDavor Mandić
MentorŽeljko Alar (mentor)
Committee memberIvica Garašić (predsjednik povjerenstva)
Committee memberŽeljko Alar (član povjerenstva)
Committee memberDario Iljkić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2019-06-14, 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)
Languagecroatian
URN:NBNurn:nbn:hr:235:652529
Study programmeTitle: 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 resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
RepositoryRepository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb
Created on2019-09-25 09:59:38

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