Experimental and Computational Study of Ductile Fracture in Small Punch Tests

Experimental and Computational Study of Ductile Fracture in Small Punch Tests

A unified experimental-computational study on ductile fracture initiation and propagation during small punch testing is presented. Tests are carried out at room temperature with unnotched disks of different thicknesses where large-scale yielding prevails. In thinner specimens, the fracture occurs wi...

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Bibliographic Details
Main Authors: Betül Gülçimen Çakan, Celal Soyarslan, Swantje Bargmann, Peter Hähner
Format: Article
Language:English
Published: MDPI AG 2017-10-01
Series:Materials
Subjects:
small punch test
P91 steel
ductile fracture
gurson’s plasticity model
nonlocal plasticity
Online Access:https://www.mdpi.com/1996-1944/10/10/1185
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spelling doaj-07a7b17c8d6a4722b3bd27925c42787c2020-11-24T22:10:56ZengMDPI AGMaterials1996-19442017-10-011010118510.3390/ma10101185ma10101185Experimental and Computational Study of Ductile Fracture in Small Punch TestsBetül Gülçimen Çakan0Celal Soyarslan1Swantje Bargmann2Peter Hähner3Department of Mechanical Engineering, Uludağ University, Görükle, 16059 Bursa, TurkeyChair of Solid Mechanics, School of Mechanical Engineering and Safety Engineering, University of Wuppertal, 42119 Wuppertal, GermanyChair of Solid Mechanics, School of Mechanical Engineering and Safety Engineering, University of Wuppertal, 42119 Wuppertal, GermanyNuclear Safety and Security Directorate, Joint Research Centre, European Commission, NL-1755 LE Petten, The NetherlandsA unified experimental-computational study on ductile fracture initiation and propagation during small punch testing is presented. Tests are carried out at room temperature with unnotched disks of different thicknesses where large-scale yielding prevails. In thinner specimens, the fracture occurs with severe necking under membrane tension, whereas for thicker ones a through thickness shearing mode prevails changing the crack orientation relative to the loading direction. Computational studies involve finite element simulations using a shear modified Gurson-Tvergaard-Needleman porous plasticity model with an integral-type nonlocal formulation. The predicted punch load-displacement curves and deformed profiles are in good agreement with the experimental results.https://www.mdpi.com/1996-1944/10/10/1185small punch testP91 steelductile fracturegurson’s plasticity modelnonlocal plasticity
collection DOAJ
language English
format Article
sources DOAJ
author Betül Gülçimen Çakan
Celal Soyarslan
Swantje Bargmann
Peter Hähner
spellingShingle Betül Gülçimen Çakan
Celal Soyarslan
Swantje Bargmann
Peter Hähner
Experimental and Computational Study of Ductile Fracture in Small Punch Tests
Materials
small punch test
P91 steel
ductile fracture
gurson’s plasticity model
nonlocal plasticity
author_facet Betül Gülçimen Çakan
Celal Soyarslan
Swantje Bargmann
Peter Hähner
author_sort Betül Gülçimen Çakan
title Experimental and Computational Study of Ductile Fracture in Small Punch Tests
title_short Experimental and Computational Study of Ductile Fracture in Small Punch Tests
title_full Experimental and Computational Study of Ductile Fracture in Small Punch Tests
title_fullStr Experimental and Computational Study of Ductile Fracture in Small Punch Tests
title_full_unstemmed Experimental and Computational Study of Ductile Fracture in Small Punch Tests
title_sort experimental and computational study of ductile fracture in small punch tests
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2017-10-01
description A unified experimental-computational study on ductile fracture initiation and propagation during small punch testing is presented. Tests are carried out at room temperature with unnotched disks of different thicknesses where large-scale yielding prevails. In thinner specimens, the fracture occurs with severe necking under membrane tension, whereas for thicker ones a through thickness shearing mode prevails changing the crack orientation relative to the loading direction. Computational studies involve finite element simulations using a shear modified Gurson-Tvergaard-Needleman porous plasticity model with an integral-type nonlocal formulation. The predicted punch load-displacement curves and deformed profiles are in good agreement with the experimental results.
topic small punch test
P91 steel
ductile fracture
gurson’s plasticity model
nonlocal plasticity
url https://www.mdpi.com/1996-1944/10/10/1185
work_keys_str_mv AT betulgulcimencakan experimentalandcomputationalstudyofductilefractureinsmallpunchtests
AT celalsoyarslan experimentalandcomputationalstudyofductilefractureinsmallpunchtests
AT swantjebargmann experimentalandcomputationalstudyofductilefractureinsmallpunchtests
AT peterhahner experimentalandcomputationalstudyofductilefractureinsmallpunchtests
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