A study on the constitutive equation effects in the fracture initiation of AA5450 sheets

Date

2019-01-01

Author

Dizaji, Shahram A.
Darendeliler, Haluk
Kaftanoğlu, Bilgin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

191
views

0
downloads

© Springer Nature Singapore Pte Ltd. 2019.Determination of the fracture initiation in the sheet metal forming applications can be achieved successfully using ductile fracture criteria (DFCs) and finite element codes together. In this study three different uncoupled, energy based ductile fracture criteria have been employed to predict the onset of the fracture in the AA5450 aluminum alloy sheets. Also, two different constitutive models namely, isotropic von-Mises and anisotropic Hill, have been implemented to the finite element code ABAQUS through VUMAT subroutine to investigate the effect of constitutive equations on the applicability of the utilized DFCs. It was shown that the constitutive model has significant influence on the estimation of the time and place of the fracture initiation in the sheets.

Subject Keywords

Ductile fracture, Constitutive equations, FLCF

URI

https://hdl.handle.net/11511/57302

DOI

https://doi.org/10.1007/978-981-13-0411-8_8

Collections

Department of Mechanical Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Development of a Micromechanics Based Cohesive Zone Model and Application for Ductile Fracture Yalçınkaya, Tuncay; Tandoğan, İzzet Tarık (2019-01-01) In this paper, derivation and implementation of a micromechanically motivated traction separation law for cohesive zone modeling of ductile fracture is discussed. The formulation of the framework is based on the growth of pores in an array of representative volume elements where pores are idealized as cylinders. Two relations are derived under normal and shear loading for mode-I and mixed-mode respectively, based on the upper bound for a perfectly plastic material (Yalcinkaya and Cocks (2015), Yalcinkaya an...
A fractographic study on toughening of epoxy resin using ground tyre rubber Kaynak, Cevdet; Akovali, G. (2001-01-01) This study is a fractographic examination of epoxy resin modified with scrap car tyre regrinds used as toughening phase. Five different surface treatment techniques, used to improve the compatibility at the interface between the rubber particles and the epoxy matrix, were: oxygen plasma, two silane coupling agents, acrylic acid and acrylic acid/benzoylperoxide mixture. Rubber parts of ground scrap car tyres with a size range of 355-500 mum after surface treatment were mixed with epoxy. This mixture was pour...
A Study on the tensile strength of compacted Ankara clay and kaolin clay Dağar, Volkan; Çokça, Erdal; Department of Civil Engineering (2017) Tensile strength of clay, is a major mechanical parameter and is the main controlling parameter of tensile crack development which is generally encountered in geostructures. The researches to determine the tensile strength of clays are very limited. There are two kinds of methods which are used to measure the tensile strength of soils and these are named as, indirect and direct methods. In this experimental study, a direct tensile test apparatus was developed for measurement and understanding of the tensile...
Prediction of forming limit curve at fracture for sheet metal using new ductile fracture criterion Dizaji, Shahram Abbasnejad; Darendeliler, Haluk; KAFTANOĞLU, BİLGİN (Elsevier BV, 2018-05-01) The application of ductile fracture criteria (DFCs) in numerical analysis of sheet metal forming processes can lead to the accurate determination of the fracture initiation. In this study, a new uncoupled ductile fracture criterion (DFC) has been developed which considers the effects of material parameters on the forming limit curves (FLCs) and can be easily implemented in the finite element codes. Two different constitutive models have been employed with the new DFC in order to evaluate the results obtaine...
A Study on Tensile Strength of Compacted Fine-Grained Soils Dagar, Volkan; Çokça, Erdal (Springer Science and Business Media LLC, 2020-08-01) The tensile strength of clay is a major mechanical parameter and the main controlling parameter of tensile crack development which is generally encountered in geostructures. In this experimental study, 8-shaped direct tensile test and split tensile test were used to measure the tensile strength of compacted clay soil. Unconfined compression tests on the same clay samples were also carried out. Tensile strength and unconfined compression test results were compared. Laboratory tests were performed on Ankara c...

Citation Formats

S. A. Dizaji, H. Darendeliler, and B. Kaftanoğlu, “A study on the constitutive equation effects in the fracture initiation of AA5450 sheets,” 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57302.