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FME Transactions
2017, vol. 45, br. 1, str. 109-116
jezik rada: engleski
vrsta rada: neklasifikovan
objavljeno: 31/03/2017
doi: 10.5937/fmet1701109B
Creative Commons License 4.0
Kalibrisanje konstitutivnih modela korišćenjem instrumentalnog utiskivanja i stohastičke inverzne analize
Univerzitet u Beogradu, Mašinski fakultet

e-adresa: vbuljak@mas.bg.ac.rs

Projekat

CERMAT2 - New ceramic technologies and novel multifunctional ceramic devices and structures (EU-FP7 - 606878)

Sažetak

Eksperiment instrumentalnog utiskivanja se sve više koristi za karakterizaciju materijala različitog tipa. Razvijene metode kombinuju ovaj test sa kompjuterskom simulacijom u okviru inverznih analiza sa ciljem dobijanja parametara koji ulaze u jednačine različitih konstitutivnih modela. Izlaz iz ovakvih procedura predstavljaju vrednosti traženih parametara u determinističkom smislu, dok je za praktičnu inženjersku upotrebu poželjno raspolagati i sa procenom tačnosti dobijenih vrednosti. U ovom radu prikazana je numeričko-eksperimentalna metoda zasnovana na inverznoj analizi koja kao ulazni podatak koristi eksperimentalno izmerenu krivu utiskivanja (kriva koja daje zavisnost primenjene sila u funkciji ostvarene dubine utiskivanja). Numeričke simulacije testa utiskivanja su značajno ubrzame primenom redukovanog modela zasnovanog na pravilnoj ortogonalnoj dekompoziciji a posebno razvijenom za ovu svrhu. Rezultijući inverzni problem je rešen u stohastičkom kontekstu korišćenjem Monte Karlo simulacija kao i Kalmanovih filtera. Dobijeni rezultati su komparativno prezentovani u cilju poređenja dobijene tačnosti i računarske efikasnosti.

Ključne reči

Stochastic material characterization; indentation test; drucker-prager model; inverse analyses

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