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Browsing by Author "FIRAT, MEHMET/0000-0002-3973-4736"

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A Numerical Prediction for Hole-Splitting Damage of DP Steels Based on Plastic Work Criterion Using a Polynomial Stress Potential

Firat, M; Aksen, TA; Sener, B; Esener, E (2023)

The main purpose of this study is to exhibit failure prediction capability of polynomial-based yield functions with a basic damage model. For this purpose, a constitutive model considering anisotropic plasticity and ductile ...
Analysis of ESAFORM 2021 cup drawing benchmark of an Al alloy, critical factors for accuracy and efficiency of FE simulations

Habraken, Anne Marie; Aksen, Toros Arda; Alves, Jose L.; Amaral, Rui L.; Betaieb, Ehssen; Chandola, Nitin; Corallo, Luca; Cruz, Daniel J.; Duchene, Laurent; Engel, Bernd; Esener, Emre; Firat, Mehmet (SPRINGER FRANCE, 2022)

This article details the ESAFORM Benchmark 2021. The deep drawing cup of a 1 mm thick, AA 6016-T4 sheet with a strong cube texture was simulated by 11 teams relying on phenomenological or crystal plasticity approaches, ...
Blank thinning predictions of an aluminum alloy in hole expansion process using finite element method

Aksen, Toros Arda; Firat, Mehmet (SPRINGER INTERNATIONAL PUBLISHING AG, 2021)

The main objective of this study is to accurately predict the thinning behavior of AA6016-O aluminum alloy in the hole expansion test. In order to perform this aim, three yield functions, namely isotropic von Mises, quadratic ...
Earing prediction of 2090-T3 aluminum-cups using a complete homogenous fourth-order polynomial yield function

Firat, Mehmet; Sener, Bora; Aksen, Toros Arda; Esener, Emre (2022)

Earing can be described as difference in cup wall height due to planar anisotropy of the sheet metals, and both prediction and minimization of this defect are critical steps of drawing process design to save material and ...
Modeling plastic anisotropy evolution of AISI 304 steel sheets by a polynomial yield function

Sener, Bora; Esener, Emre; Firat, Mehmet (SPRINGER INTERNATIONAL PUBLISHING AG, 2021)

In this study, a numerical model for the evolution of plastic anisotropy is investigated for the purpose of stamping method design by Finite Element (FE) analysis and proved experimentally via process simulations of a ...
Round bar notch shape optimization for tensile stress concentration testing

Ozsoy, M; Aksen, TA; Eksi, S; Ozsoy, N; Firat, M (2023)

Notched structures in machine parts for several reasons cause discontinuity and stress concentration. It is essential to optimize these stress concentrations in notched parts. This study determined the best notch shape by ...