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Finite element analysis of fracture resistance parameters for stationary semi-elliptical surface cracks in high strength steel

Analiza parametara otpornosti na lom metodom konačnih elemenata, kod stacionarnih polueliptičnih prslina u čeliku povišene čvrstoće

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2015
131-IVK3-2015-ED-BM-AS.pdf (607.4Kb)
Authors
Doncheva, Elisaveta
Međo, Bojan
Sedmak, Aleksandar
article (publishedVersion)
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Abstract
This study deals with numerical simulations based on elastic-plastic finite element method for nonlinear stress analyses on pre-cracked tensile specimens with high strength properties. The influence of crack geometry on fracture resistance properties is considered with numerical analysis on models with two different cracks. Results on fracture resistance parameters are obtained for both simulated tensile panels with different crack lengths and width, referred as short and long crack. The obtained numerical results for crack resistance behaviour of tensile specimens are compared with data results from existing experimental investigations on specimens with same shape and material properties. Also, comparison is made with results obtained from similar standard experimental procedure. It is shown, that a proper combination of numerical and experimental procedures can lead research to significantly accurate results when investigating the fracture response of materials.
U ovom radu se razmatraju numeričke simulacije na bazi elastoplastičnih konačnih elemenata kod nelinearnih naponskih analiza zateznih epruveta sa prslinom, od materijala povišene čvrstoće. Uticaj geometrije prsline na otpornost prema lomu je razmatran u numeričkoj analizi na modelima sa dve različite prsline. Rezultati parametara loma su dobijeni kako za simulaciju zateznih ploča različitih dužina prsline i širina, koje čine tzv. kratke i duge prsline. Poređenjem dobijenih numeričkih rezultata za otpornost na lom zateznih epruveta sa rezultatima odgovarajućih eksperimentalnih ispitivanja epruveta istih oblika i osobina materijala, kao i poređenje sa rezultatima dobijenim sličnim standardnim eksperimentalnim postupcima, pokazuje se da pravilna kombinacija numeričkih i eksperimentalnih procedura može usmeriti istraživanje u dobijanju mnogo preciznijih rezultata u istraživanju svojstava otpornosti na lom materijala.
Keywords:
J integral / finite element method / plastic behaviour / J integral / metoda konačnih elemenata / plastično ponašanje
Source:
Integritet i vek konstrukcija, 2015, 15, 3, 131-134
Publisher:
  • Society for Structural Integrity and Life, Institute for Material Testing
Funding / projects:
  • info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/35040/RS// (RS-35040)
  • info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/35024/RS// (RS-35024)
  • info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172019/RS// (RS-172019)

ISSN: 1451-3749

WoS: 000450115600001

Scopus: 2-s2.0-84962786756
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URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2937
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet

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