Modeliranje širenja pukotine zamora u 2D strukturama primenom CPCN-FEM pristupa koji se zasniva na čvorovima

  • Noureddine Mahmoudi University Dr.Moulai Tahar SAIDA
  • Mohammed Bentahar Univerzitet u Saidi "Dr. Mulaj Tahar", Tehnički fakultet, Odeljenje za građevinarstvo i hidrauliku, Saida, Narodna Demokratska Republika Alžir
  • Hachemi Nedir Univerzitet "Mustafa Stambuli", Laboratorija za kvantnu fiziku materije i matematičko modeliranje (LPQ3M), Maskara, Narodna Demokratska Republika Alžir
  • Moulai Arbi Youcef Univerzitet Mustapha Stambouli, Maskara, Narodna Demokratska Republika Alžir. https://orcid.org/0000-0002-6534-8820
Ključne reči: širenje pukotina, faktor intenziteta napona (SIF), metoda konačnih elemenata, CPCN-FEM, koordinate čvorova, mehanika loma

Sažetak


Uvod/cilj: Cilj ovog rada je modeliranje širenja pukotina nastalih usled zamora uvođenjem numeričke metode CPCN-FEM (eng. Crack Propagation by Coordinates of Nodes – Finite Element Method) koja predviđa putanje pukotina sistematskim generisanjem koordinata čvorova oko fronta pukotine. Metode: Pristup definiše četiri glavna čvora za kontrolu pravca širenja i izračunava faktore intenziteta napona (K I) i (K II), kao i ugao nagiba pukotine (β).

Metoda je implementirana u FORTRAN-u radi automatizacije praćenja čvorova, ažuriranja koordinata i postepenog napredovanja pukotine u dvodimenzionalnom elastičnom izotropnom modelu. Simulacije se sprovode i upoređuju sa analitičkim rešenjima putanje pukotine koristeći Ričardov kriterijum za određivanje orijentacije pukotine.

Rezultati: Numerički model je reprodukovao očekivane putanje pukotina uz visoko podudaranje sa analitičkim predviđanjima i pokazao stabilno ponašanje pomeranja kroz više slučajeva širenja. Integritet mreže je očuvan tokom svih koraka širenja.

Zaključak: Rezultati pokazuju da metoda CPCN-FEM predstavlja tačnu, efikasnu i mrežno stabilnu tehniku za modeliranje širenja pukotina nastalih usled zamora koja pruža pouzdana predviđanja evolucije putanje pukotine u mehanici loma.

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2026/01/23
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