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Determination of Elastic Plastic Fracture Toughness Parameters for a Compact Tension Specimen Using the Finite Element Method

  • Uğur Özdemir and Çinar Yeni
Published/Copyright: May 26, 2013
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Materials Testing
From the journal Materials Testing Volume 54 Issue 6

Abstract

In this study, elastic-plastic fracture toughness of an aluminum alloy is investigated. J-integral was calculated using the finite element software and formulation. Crack tip opening displacement (CTOD) is determined by using the plastic hinge model (δph) and direct measurement (δ5). J-Δ a and CTOD-Δ a resistance curves are constructed and compared with those obtained from formulation and those generated from test data, respectively. Good agreement has been obtained between the test results, the formulation and the results of the finite element analysis. The relationship between δph and δ5 is nonlinear and as CTOD increases δ5 becomes larger than δph. The relationship between J-integral and CTOD is found to be linear for both δph and δ5. It has been seen that the proportionality constant dn considerably depends on the method of calculation of CTOD.

Kurzfassung

In der diesem Beitrag zugrunde liegenden Studie wurde das bruchmechanische Verhalten einer Aluminiumlegierung untersucht. Hierzu wurde das J-Integral unter Verwendung einer Finite Elemente Software mit der entsprechenden Formulierung bestimmt. Der CTOD-Wert wurde mittels des plastischen Hinge-Modells (δ ph) sowie anhand direkter Messung (δ5) ermittelt. Die J-Δa und CTOD-Δa Widerstandkurven wurden entwickelt sowie jeweils mit den formulierten und mit denen aus Testdaten generierten verglichen. Es konnte eine gute Übereinstimmung zwischen den Testergebnissen, der Formulierung und den Ergebnissen der Finite Elemente Analysen erzielt werden. Das Verhältnis zwischen δph und δ5 ist nichtlinear und wenn der CTOD-Wert ansteigt, wird δ5 größer als δph. Das Verhältnis zwischen dem J-Integral und dem CTOD-Wert war sowohl für δph als auch für δ5 linear. Es konnte festgestellt werden, dass die Proportionalitätskonstante dn bemerkenswert von dem Kalkulationsverfahren des CTOD-Wertes abhängt.

Uğur Özdemir studied Mechanical Engineering at the Mustafa Kemal University, Turkey, in 2001. He has carried out the experimental work of him M. Sc. thesis at GKSS Research Center, Germany, in diffusion bonding of TiAl alloys and earned his M. Sc. from the Mustafa Kemal University, in 2003. He is doing Ph.D in elastic-plastic fracture mechanics of laser welded materials at Dokuz Eylül University, Turkey.

Çinar Yeni was born in 1967. She has carried out the experimental work of her M. Sc. and Ph. D. theses at Helmholtz-Zentrum Geesthacht (formerly named as GKSS Research Center), Germany, in fatigue and elastic-plastic fracture mechanics subjects and also participated in projects on noval welding methods during her post-doc studies. She is currently working as an associate professor at Dokuz Eylül University, Turkey. Her main areas of interest are fatigue and fracture of welded materials, namely laser and friction stir welding.

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Published Online: 2013-05-26
Published in Print: 2012-06-01

© 2012, Carl Hanser Verlag, München

Articles in the same Issue

  1. Inhalt/Contents
  2. Inhalt
  3. Fachbeiträge/Technical Contributions
  4. Effect of Heat Treatment Conditions on Microstructure and Mechanical Properties of Long Term Serviced Fe25Cr-35Ni Alloy
  5. Characterization of Eutectic Sn-Cu Solder Alloy Properties Improved by Additions of Ni, Co and In
  6. Recycling of Aluminium Alloy Scraps by Pressure-Assisted Investment Casting for Aluminium Foam Manufacture
  7. X-ray Residual Stress Analysis of Nitrided Low Alloyed Steels
  8. Determination of Elastic Plastic Fracture Toughness Parameters for a Compact Tension Specimen Using the Finite Element Method
  9. Structural Damage Detection Using Modal Parameters and Particle Swarm Optimization
  10. Examination of Microstructure and Wear Behaviour of a Roller Material Produced by Centrifugal Casting
  11. Effects of Co as an Alloying Element and Heat Treatment Processes on the Properties of High Speed Steels
  12. Application of Genetic Algorithm (GA) for Optimum Design of Module, Shaft Diameter and Bearing for Bevel Gearbox
  13. Evaluation and Optimization of Operating Parameters Affecting the Davis Tube Magnetic Tester by Using 2nd Factorial Design
  14. Terahertz Time Domain Spectroscopy for Non-Destructive Testing of Hazardous Liquids
  15. Vorschau/Preview
  16. Vorschau
  17. Kalender/Calendar
  18. Kalender
https://doi.org/10.3139/120.110345

Articles in the same Issue

  1. Inhalt/Contents
  2. Inhalt
  3. Fachbeiträge/Technical Contributions
  4. Effect of Heat Treatment Conditions on Microstructure and Mechanical Properties of Long Term Serviced Fe25Cr-35Ni Alloy
  5. Characterization of Eutectic Sn-Cu Solder Alloy Properties Improved by Additions of Ni, Co and In
  6. Recycling of Aluminium Alloy Scraps by Pressure-Assisted Investment Casting for Aluminium Foam Manufacture
  7. X-ray Residual Stress Analysis of Nitrided Low Alloyed Steels
  8. Determination of Elastic Plastic Fracture Toughness Parameters for a Compact Tension Specimen Using the Finite Element Method
  9. Structural Damage Detection Using Modal Parameters and Particle Swarm Optimization
  10. Examination of Microstructure and Wear Behaviour of a Roller Material Produced by Centrifugal Casting
  11. Effects of Co as an Alloying Element and Heat Treatment Processes on the Properties of High Speed Steels
  12. Application of Genetic Algorithm (GA) for Optimum Design of Module, Shaft Diameter and Bearing for Bevel Gearbox
  13. Evaluation and Optimization of Operating Parameters Affecting the Davis Tube Magnetic Tester by Using 2nd Factorial Design
  14. Terahertz Time Domain Spectroscopy for Non-Destructive Testing of Hazardous Liquids
  15. Vorschau/Preview
  16. Vorschau
  17. Kalender/Calendar
  18. Kalender
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